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44. Between which two integers would the solution to 4^x = 50 lie? Second, find the exact solution by changing to logarithmic form and solving.

Answers

Answer 1

Answer: To find the two integers between which the solution to 4^x = 50 lies, we can take the logarithm base 4 of both sides of the equation: x = log4(50). The logarithm of 50 with base 4 is approximately 2.3219. Since the logarithm of a number is always positive, the solution to 4^x = 50 lies between 2 and 3.

To find the exact solution, we can change the equation to logarithmic form by taking the logarithm base 4 of both sides: log4(4^x) = log4(50)

Using the logarithmic identity: log(b^x) = x*log(b)

So we have: x*log(4) = log(50)

Dividing both sides by log(4), we have:

x = log(50) / log(4)

To find the exact solution we can approximate log(50) / log(4) using a calculator or logarithm tables. The exact solution is x ≈ 2.32192809488736218170856773213.

So, the exact solution is x = 2.32192809488736218170856773213, which is between 2 and 3, as stated before.

Step-by-step explanation:


Related Questions

(PLEASE HELP IM GIVING OUT BRAINLIST PLEASE help help).


The number of papers ms. Motley grades increases exponentially as
time goes on. On the first day she grades 9 papers , on the second day she grades 27 papers and on the third day she grades 31 papers

How many will she grade in five days?

After many days will it take her to grade 6,000 papers?

Answers

The papers graded exponentially at the end of 5 days are 134, and it will take approximately around 12 days to complete 6000 papers.

What is exponential function?

A function is considered to be exponentially growing if its value rises faster than any polynomial. The function e^x, serves as a good illustration.

The exponential growth is given by the following formula:

[tex]A = Pe^{rt}[/tex]

where, A is the final amount, P is the initial amount, r is the rate and t is the time.

For t = 0, the number of papers graded are, 9, hence the value of P = 9.

To calculate the rate at which the work is done, substitute the value of P = 9, A = 27 and t = 2 in the equation:

[tex]27 = 9 e^{2r}\\3 = e^{2r}[/tex]

Taking ln on both sides of the equation:

[tex]ln (3) = ln(e^{2r})\\\\ln(3) = 2r[/tex]

1.09 = 2r

r = 0.54

To calculate the number of papers graded in five days, substitute the value of P = 9, t = 5 and r = 0.54.

[tex]A = 9 e^{(0.54)(5)}[/tex]

A = 134

Hence, the papers graded at the end of 5 days are 134.

To complete grading 6000 papers, the time taken will be:

6000 = 9e^(0.54)(t)

666.66 = e^(0.54)(t)

Taking ln on both sides of the equation:

ln (666.66) = ln(e^(0.54)(t))

6.50 = (0.54)(t)

t = 12.04

Hence, it will take approximately around 12 days to complete 6000 papers.

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based on the histogram shown, of the following, which is closest to the average (arithmetic mean) number of seeds per apple?

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The closest to the average(arithmetic mean) number of seeds per apple is 6.

What is average ?

An average, also known as a mean, is a measure of central tendency that represents the typical value of a set of data. To calculate the average of a set of numbers, you add them up and then divide by the number of items in the set. For example, the average of the numbers 2, 4, 6, and 8 is (2 + 4 + 6).

Average =  Total number of seeds/12

⇒ Average = 2×3+4×5+1×6+2×7+3×9/12

​⇒ Average = 73/12

⇒ Average ≈6

The closest to the average(arithmetic mean) number of seeds per apple is 6.

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Mathematical 8. PRACTICE Model Math Christy purchased 6.75 pounds of licorice. How much licorice does she need to put in each bag if she divides the total amount into 10 equal-sized bags?​

Answers

Answer:i think it is yes! this )--89+98

Step-by-step explanation:

Find the average of the following set of integers. −20,−54,−93,37,45

Answers

The average of given set of integers is -17.

What is the average?

In maths, the average value in a set of numbers is the middle value, calculated by dividing the total of all the values by the number of values. When we need to find the average of a set of data, we add up all the values and then divide this total by the number of values.

The given set of integers are -20, -54, -93, 37 and 45.

Here, average = Sum of all the observations/Number of observations

= (-20-54-93+37+45)/5

= -85/5

= -17

Therefore, the average of given set of integers is -17.

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Question 6
Find the area of triangle ABC:
AD is 1cm and BC is 1cm and D is 90

Answers

The area of triangle ABC is 0.5cm² where base and height are given.

Describe Area.

Triangle area is used to measure the size of a region on a surface. The area of a form or planar lamina is referred to as the plane region or plane area, as opposed to surface area, which denotes the area of an open surface or the boundary of a three-dimensional object.

The area of a triangle can be compared to the volume of material at a specific thickness needed to make a model of the form or the amount of paint needed to cover a surface in a single coat. It is equivalent to a solid's volume or a curve's length in two dimensions (a three-dimensional concept).

From the given figure, we can say that

Height = AD = 1cm

Base = BC = 1cm

Area of Triangle = Base × Height/2

Area = 1 × 1 /2

Area = 0.5 cm²

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When assessing schedule feasibility, a systems analyst must consider the interaction between time and costs.true or false

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True, When assessing schedule feasibility, a systems analyst must consider the interaction between time and costs.

When assessing the viability of scheduling a project, an organisation determines the anticipated completion time. The feasibility analysis assists in identifying any potential obstacles the proposed project may encounter, such as: Internal project constraints, including those related to technology, finances, and resources

The expansion and acceptance of project management training have undergone significant changes over the past few years, and it is projected that these developments will continue and accelerate. And as project management becomes more popular, feasibility studies become more important. It may be exhilarating to begin a difficult, extensive project that will have a significant influence on your organization.

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Exercise 5 The table shows the number of registered electric cars in Norway in the period 2016-2021.

Number of
year electric cars
2016 - 97,532
2017 - 138,983
2018 - 195,351
2019 - 260,692
2020 - 337,201
2021 - 455,277

Task A: Create an exponential model for the development in the number of electric cars for the years 2016-2021.

Task B: Use the model from task a to estimate the number of electric cars in 2025.​

Answers

An exponential model has the formula A is A0(b)t/c, so, we get 1071371.

How Do You Create a Model of Exponential Growth?The formula for exponential growthOne plus the growth rate r is added. Find the growth rate, replace it with the appropriate value in the formula, and then add one.Raise the product of one and r to the power of x. Identify the period of time during which population increase takes place.multiply by the starting point.Analyze the outcomes.An exponential model has the formula A = A0(b)t/c, where A0 is the starting quantity of the thing being modeled.t is the amount of time that has passed.A is equal to the sum at time t.B is the growth factor, and c is the amount of time it takes for it to manifest.

A = A0(b)t/c,

97532 ( 455277)1/ 41446 = 1071371.

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write the word sentence as an equation: 5 is one-forth of a number c

(don't solve. just write an equation)

Answers

The equation of the word sentence, "5 is one-fourth of a number c" is: 5 = 1/4c.

How to Write a Word Sentence as an Equation?

To write a word sentence as an equation, you need to identify the variables and the operations being described in the sentence, and then use mathematical symbols to represent them.

For example, we are given the sentence "5 is one-fourth of a number c,", in this case, the variable is "c" and the operation is "one-fourth of," which is represented by the fraction 1/4 or the multiplication by 1/4.

Therefore, the equation would be:

5 = 1/4c.

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Can any anyone explain X^3=-125 ?
This is solving polynomial equations.

Answers

The value of x in the equation,  X^3= -125 is -5.

How do we arrive at the solution for x?

To find x in the above polynomial equation, we need to collect like terms and equate the expression to 0. To begin we can arrange the expression this way:

x^3 + 125 = 0

This means that we should find the figure which when multiplied three times would equate to 125. This figure is -5. So, when solved, we have:

-5³ + 125 = 0

-125 +125 = 0

So, the value for x in the equation above is -5.

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The distance between -19 and 12 is

Answers

Answer:

The distance between -19 and 12 is 31.

Step-by-step explanation:

32.- The high costs of the California real estate market have caused families who cannot afford to buy larger houses to consider backyard sheds as an expansion option. Many are using their patio structures to build their studios, art rooms, and hobby areas, as well as for additional storage. The median price for a custom-built backyard clapboard frame is $3,100 (Newsweek, September 29, 2003). Assume that the standard deviation is $1,200.

Answers

The z-score for a backyard structure costing $2300 is -0.67.

How to calculate the z score?

The standard score in statistics is the amount of standard deviations that a raw score deviates from or exceeds the mean of the phenomenon being observed or measured. Standard scores are positive for raw scores above the mean and negative for raw scores below the mean.

The Z-score quantifies the deviation between a given value and the standard deviation. The Z-score, also known as the standard score, indicates how many standard deviations a given data point deviates from the mean. In essence, standard deviation represents the degree of variability present in a given data set.

The z score will be:

= (2300 - 3100) / 1200

= -0.67.

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The high costs in the California real estate market have caused families who cannot afford to buy bigger homes to consider backyard sheds as an alternative form of housing expansion. Many are using the backyard structures for home offices, art studios, and hobby areas as well as for additional storage. The mean price of a customized wooden, shingled backyard structure is $3100 (Newsweek, September 29, 2003). Assume that the standard deviation is $1200.

a. What is the z-score for a backyard structure costing $2300?

Please, very important for me, I’ll give brainliest if you want

Answers

The quartic function y = 0.5 · x⁴ - x³ - 15.5 · x² + 30 · x + 21 contains roots 4 - √2 and - 3 + √6 and intercept - 21.

How to derive a quartic function

Quartic functions are polynomials of grade 4, whose factor form is introduced below:

y = a · (x - r₁) · (x - r₂) · (x - r₃) · (x - r₄)

Where:

a - Lead coefficientr₁, r₂, r₃, r₄ - Roots

According to statement, the quartic equation has an intercept of - 21 and two real roots: 4 - √2, - 3 + √6. The two remaining roots can be found based on features exhibited by quadratic formula and that quartic functions are the product of two quadratic functions: 4 + √2, - 3 - √6

Now we proceed to expand the quartic function:

y = a · (x - 4 + √2) · (x - 4 - √2) · (x + 3 - √6) · (x + 3 + √6)

y = a · (x² - 8 · x + 14) · (x² + 6 · x + 3)

y = a · [x² · (x² - 8 · x + 14) + 6 · x · (x² - 8 · x + 14) + 3 · (x² - 8 · x + 14)]

y = a · (x⁴ - 8 · x³ + 14 · x² + 6 · x³ - 48 · x² + 84 · x + 3 · x² - 24 · x + 42)

y = a · (x⁴ - 2 · x³ - 31 · x² + 60 · x + 42)

And we find the lead coefficient:

- 21 = 42 · a

a = - 0.5

And we obtain the quartic function in standard form:

y = 0.5 · x⁴ - x³ - 15.5 · x² + 30 · x + 21

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Suppose your MP3 player contains 100 songs. 10 of those songs ae by your favorite group (say U2). Suppose the shuffle feature is used to play the songs in random order: What is the probability that the first U2 song heard is the Sth song played? What is the probability that one of the first five songs played is U2 song?

Answers

The probability that the first MP3 song heard is the fifth song played is:

[tex]\frac{C^9^0_4.C^1^0_1}{C^1^0^0_5}[/tex] =  [tex]\frac{2,555,190. 10}{75,287,520}[/tex] ≈ 0.3394

The probability that there are exactly two MP3 songs in the first five songs played is:

[tex]\frac{C^1^0_2.C^9^0_3}{C^1^0^0_5}[/tex] [tex]= \frac{45.117,480}{75,287,520}[/tex] ≈ 0.0702

Now, According to the question:

The 1st MP3 player songs heard is the 5th song played means that first 4 songs are not MP3 songs (there are 100 - 10 = 90 such songs) and the 5th song is MP3 song (there are 10 such songs). Hence, the probability that the first MP3 song heard is the fifth song played is:

[tex]\frac{C^9^0_4.C^1^0_1}{C^1^0^0_5}[/tex] =  [tex]\frac{2,555,190. 10}{75,287,520}[/tex] ≈ 0.3394

There are exactly two MP3 songs in the first five songs played means there are 2 MP3 songs and 3 not MP3 songs (the number when these songs are played do not matter). Hence, the probability that there are exactly two MP3 songs in the first five songs played is:

[tex]\frac{C^1^0_2.C^9^0_3}{C^1^0^0_5}[/tex] [tex]= \frac{45.117,480}{75,287,520}[/tex] ≈ 0.0702

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find the unit vector orthogonal to the plane through the points p, q and r which has a positive y-component.

Answers

The unit vector orthogonal to the plane can be found by taking the cross product of the vectors p-q and p-r. The vector should have a positive y-component if the cross product points in the positive y direction.

To find a unit vector orthogonal to the plane through the points p, q, and r, with a positive y-component, we will use the cross product of two of the vectors. The cross product of two vectors is a vector perpendicular to both of them. First, we will create vector p-q, which is a vector from point p to point q. We can do this by subtracting the coordinates of point q from the coordinates of point p. Next, we will create vector p-r, which is a vector from point p to point r. We can do this by subtracting the coordinates of point r from the coordinates of point p. Finally, we will take the cross product of the two vectors. This will give us a vector orthogonal to the plane through the three points. If the vector has a positive y-component, then it is the unit vector orthogonal to the plane that we are looking for.

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Rewrite this number in appropriate scientific notation:
459,000

Answers

Answer:

4.59 × 10^(5)

Step-by-step explanation:

Answer: 4.59 x 10^5

Step-by-step explanation:

If we move the decimal place over 5 times in the answer we get 459,000.

I hope this was able to help you :D



If nm, find the value of x and the value of z.

Answers

In the triangles value of x is 10.39 and z is 2.6.

What are the sides of right angle triangle?

We can see from the diagram that both triangles are right triangles. As a result, we can use Pythagorean theorems. The longest side of a right triangle is the hypotenuse. In the diagram, those are sides with lengths of 4 and 12. The formula for this is:

c² = (a²+ b²), where c is the hypotenuse and the other shorter sides are a and b.

c = [tex]\sqrt{(a^{2} + b^{2} )}[/tex]

To calculate z,

By substituting the values,

4² = (z² + 3²)

16 =  (z² + 9)

z² = 16 - 9

z² = 7

z = √7

z =  2.6

To find x,

use the following formula: 12² = (x² + 6²)

144 = x² + 36

x² = 144 - 36 = 10.39

x = 10.39

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find the y intercepts of the graph shown. (5.6,0) (-3.3,0) (0.4) (-5,0)

Answers

A's x- intercept is 3 and y-intercept is 5. Both are favourable.

How can you determine a graph's y-intercept?shown. (5.6,0) (-3.3,0) (0.4) (-5,0) (-5,0)Finding the value of y at x=0 on a graph will reveal the y-intercept. At this location, the graph passes across the y-axis.The slope (m) and the y-intercept (b) of a line are highlighted in the slope-intercept form of linear equations (y=mx+b).I Plotting point A (5.6,0)(0.4) (-5,0) (-5,0)In this instance, A's x-coordinate is 3 and y-coordinate is 5. Both are favourable. As a result, the point A (0.4) is in quadrant I.ate is 3 and y-coordinate is 5. Both are favourable. As a result, the point A (-5,0) is in quadrant I. begin at the beginning. Along the x-axis, move three units to the right. Then, turn, travel parallel to the Y-axis by 5 units, and mark point A.

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FILL IN THE BLANK when calculating the confidence interval for the mean using a sample size of 30 or greater with a known population standard deviation, the ____ is used

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The standard normal distribution is used when calculating the confidence interval for the mean using a sample size of 30 or greater with a known population standard deviation.

The Z-distribution (also known as the standard normal distribution) is a normal distribution with a mean of 0 and a standard deviation of 1. When the population standard deviation is known, the sample mean follows a normal distribution and the standard error is given by the population standard deviation divided by the square root of the sample size. So, the Z-score is given by (x - μ) / (σ / √(n)) where x is the sample mean, μ is the population mean and σ is the population standard deviation and n is the sample size.

With a sample size of 30 or greater, the central limit theorem states that the sample mean will be approximately normally distributed, regardless of the shape of the population distribution. So, a Z-score can be used to find the probability that a sample mean falls within a certain range of the population mean, which is commonly used to construct a confidence interval.

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To go on a summer trip, Charlie borrows $700. He makes no payments until the end of 4 years, when he pays off the entire loan. The lender charges simple
interest at an annual rate of 4%.
Answer the following questions. If necessary, refer to the list of financial formulas.
(a) How much total interest will Charlie have to pay?
(b) What will the total repayment amount be (including interest)?
$0
X
Ś

Answers

a) The total interest that Charlie, who borrows $700 at a simple interest rate of 4% per annum, will pay after 4 years is $112.

b) The total repayment amount after 4 years, including interest, is $812.

What is simple interest?

The simple interest system is one that does not add interest to the principal before calculating subsequent years' interest.

The simple interest system is different from compound interest.

The simple interest formula is given as Principal x Time x Rate.

Principal loan = $700

Loan period = 4 years

Annual interest rate = 4%

Interest system = Simple Interest

Simple interest after 4 years = $112 ($700 x 4% x 4)

Amount to be repaid = Principal + Interest

= $812 ($700 + $112)

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2 x – 3 y = 7 –4 x + y = –5 What is the x -value of the solution to this system of equations?

Answers

The value of x which holds true for the given system of equations as required is; x = 4 / 5.

What is the value of x which holds true for the system of equations?

It follows from the task content that the value of x which holds true for the given system of equations be determined.

Since the given system is;

2x - 3y = 7........(i)

-4x + y = -5........(ii)

The value of x which holds true for the given system of equations can be determined by making y the subject of the formula in (ii) and substitution into (i) as follows;

y = 4x - 5.

Therefore;

2x - 3 (4x - 5) = 7

2x - 12x + 15 = 7

-10x = -8

x = 4/5

Ultimately, the value of x which holds true for the given system of equations is; x = 4 / 5.

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2 x – 3 y = 7 –4 x + y = –5 Wh

the following question is from the four steps of statistical inference. if you respond with a summary of all four steps, you will receive no credit on this problem:

Answers

One of the steps in statistical inference, to check the claim is hypothesis testing. In this method, we determine whether to reject or accept the null hypothesis.

Hypothesis testing is the procedure in statistical inference that helps to decide whether the result of the research study supports a particular hypothesis when applied to a population. This helps to test the relationship between two statistical variables.

This includes two types null and alternate hypotheses. If the results say that there is no relationship seen between the two variables, then the null hypothesis is accepted. But if the results so there is a relationship seen between two variables, then an alternate hypothesis is accepted. So to check our claim, we do hypothesis testing.

The complete question is -

The following question is from the four steps of statistical inference. If you respond with a summary of all four steps, you will receive no credit on this problem:

What do we do to check a claim?

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If Y is a random variable with moment-generating function m(t) and U is given by U = aY + b, a) Show that the moment-generating function of U is e tbm(at). b) If Y has mean µ and variance σ 2 , use the moment-generating function of U to derive the mean and variance of U. c) Suppose that the moment-generating function of a normally distributed random variable, Y , with mean µ and variance σ 2 is m(t) = e µt+(1/2)t 2σ 2 . Derive the moment-generating function of X = −3Y + 4. What is the distribution of X? Why?

Answers

a) E(e^(taY)) = m(at), then the moment-generating function of U is e^(tb)m(at).

b) µ is the mean of Y and σ^2 is the variance of Y.

c) the moment-generating function of X =e^((−3µ + 4)t + (9/2)σ^2t^2) and The distribution of X is normal.

a) If Y is a random variable with moment-generating function m(t), and U is given by U = aY + b, then the moment-generating function of U is e^(tb)m(at). This can be shown by using the definition of a moment-generating function:

E(e^(tU)) = E(e^(taY + tb)) = E(e^(taY)e^(tb)) = e^(tb)E(e^(taY))

Since E(e^(taY)) = m(at), then the moment-generating function of U is e^(tb)m(at).

b) To find the mean and variance of U using the moment-generating function, we can take the first and second derivatives of e^(tb)m(at) and set t = 0. The first derivative with respect to t evaluated at t = 0 is:

(d/dt)e^(tb)m(at) = be^(tb)m(at) + ae^(tb)m'(at)

Setting t = 0, we get the mean of U:

E(U) = be^(0)m(a0) + ae^(0)m'(a0) = b + a*(m'(0)) = b + a*µ

Where µ is the mean of Y.

The second derivative of e^(tb)m(at) is:

(d^2/dt^2)e^(tb)m(at) = b^2e^(tb)m(at) + 2abe^(tb)m'(at) + a^2e^(tb)m''(at)

Setting t = 0, we get the variance of U:

Var(U) = b^2e^(0)m(a0) + 2abe^(0)m'(a0) + a^2e^(0)m''(a0) = b^2 + 2ab*(m'(0)) + a^2*(m''(0)) = b^2 + 2abµ + a^2σ^2

Where µ is the mean of Y and σ^2 is the variance of Y.

c) If the moment-generating function of a normally distributed random variable Y with mean µ and variance σ^2 is m(t) = e^(µt + (1/2)t^2σ^2), then the moment-generating function of X = −3Y + 4 is e^((−3µ + 4)t + (1/2)(−3)^2σ^2t^2) = e^((−3µ + 4)t + (9/2)σ^2t^2)

The distribution of X is normal with mean (-3µ + 4) and variance (9/2)σ^2. This can be deduced by the fact that if Y is normally distributed, then a linear transformation of Y (such as X = aY + b) is also normally distributed with mean aµ + b and variance a^2σ^2.

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P(A)=0.60, p(b)=0..25 and p(A and B)=.15 what is p(A or B)?

Answers

Answer:

  0.70

Step-by-step explanation:

You want p(A+B) given that p(A) = 0.60, p(B) = 0.25, and p(A·B) = 0.15.

Probability

The relevant formula is ...

  p(A+B) = p(A) +p(B) -p(A·B)

  p(A+B) = 0.60 +0.25 -0.15

  p(A+B) = 0.70

__

Additional comment

In the attached Venn diagram, the sum of the numbers inside the circle labeled A is p(A) = 0.45 +0.15 = 0.60. Likewise, the sum of the numbers inside circle B is p(B) = 0.15 +0.10 = 0.25.

As the attachment shows, the event A includes the event 'A and B'. Likewise, event B includes the event 'A and B'. Simply adding the probabilities of A and B will cause p(A and B) to be counted twice.

9x-20=3x+32 solve for x

Answers

Answer:

[tex]x=\frac{26}{3}[/tex]

Step-by-step explanation:

Lets solve for [tex]x[/tex].

Subtract [tex]3x[/tex] from both sides of the equation.

[tex]9x-20-3x=32[/tex]

Add 20 to both sides of the equation.

[tex]9x-3x=32+20[/tex]

Simplify both sides.

[tex]6x=52[/tex]

Divide both sides of the equation by 6.

[tex]x=\frac{52}{6}[/tex]

Write the fraction in simplest form.

[tex]52 \div 2 = 26\\6 \div 2 = 3[/tex]

[tex]x=\frac{26}{3}[/tex]

Answer:

x=26/3

Step-by-step explanation:

9x-20=3x+32

9x-20+20=3x+32+20

9x=3x+52

9x-3x=3x+52-3x

6x=52

6x/6=52/6

x=26/3

find the measurements of the angles

Answers

all the mentioned angles have been found.

What is are of triangle?

The territory included by a triangle's sides is referred to as its area. Depending on the length of the sides and the internal angles, a triangle's area changes from one triangle to another. Square units like m2, cm2, and in2 are used to express the area of a triangle.

The sum of all angles of triangle = 180

∠ICA =180-20 =160

∠EAF = 20

∠ICB =180

∠GAF = 120 -20 =100

∠CAB= 180-80=100

∠HAG=180-120 =60

∠CBA=180-120=60

∠HAC.= 20

Hence all the mentioned angles have been found.

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Please I can't seem to get this. It's really hard

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The number of notepads per department used in the Southeast location is given as follows:

6.

How to obtain the number of notepads per department?

The number of notepads per department is obtained applying the proportions in the context of this problem, considering the graph.

The number of departments of the Southeast location is given as follows:

6.

Which is given from the table given in the second image for this problem.

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help pls now now pls

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The change in the function per unit over a specific period of time is the average rate of change. Between x is 5 and x is 7, the average rate of change is -4.

What is a specific period of time is the average rate of change?

The y = f graph

The points on f(x) that connect x = 5 to x = 7 are in the attachment. A green line serves as the line segment's representation.

The following values can be used to calculate the line segment's average rate of change.

If x = 5, then y = 8.

Y Equals 0 when x = 7

Consequently, the typical rate of change (m) is

(Delta*y/(Delta*x)) = m

Where:

Delta*y equals y 2 - y 1.

Sigma*y = 0 to 8

Delta*y equals -8

Delta*x equals x 2 - x 1.

x = 7 - 5 for delta.

x*Delta = 2

We therefore have:

(Delta*y/(Delta*x)) = m

m = - 8/2 m = - 4

Hence, the average rate of change from x = 5 to 7 is -4

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given that 15^5x=8 solve for x

Answers

Answer:

Step-by-step explanation:

The value of x for the given expression will be x = 0.1535.

What is an expression?

The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.

Given that the expression is [tex]15^{5x}=8[/tex]. The expression will be solved as below,

[tex]15^{5x}=8[/tex]

Take log on both the sides and solve for the value of x.

5x = 3log₁₅(2)

x = (3/2)log₁₅(2)

x = 0.1535

Hence, the value of x will be 0.1535.

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36% of the people did not vote for the candidate. 5400 people voted. How many did not vote for the candidate?

Answers

1944 people did not vote for the candidate

NO LINKS!! NOT MULTIPLE CHOICE!!

For each of the functions below, find the following information. Then sketch a graph.
a. x- int and y-int.
b. vertical asymptote(s) or any holes
c. end behavior asymptotes
d. domain and range

33. g(x) = (x - 2)/(x^2 - 2x - 3)

34. k(x)= (x^2 - x - 2)/(x - 3)

35. f(x)= -x/(x^3 - 4x)

Answers

Answer:

Question 33

a) x-int (2, 0).  y-int (0, 2/3)

b) Vertical asymptotes: x = -1 and x = 3

   Horizontal asymptote: y = 0

c) f(x) → -∞, as x → -1⁻

   f(x) → +∞, as x → -1⁺

   f(x) → -∞, as x → 3⁻

   f(x) → +∞, as x → 3⁺

d) Domain: (-∞, -1) ∪ (-1, 3) ∪ (3, ∞)

   Range: (-∞, ∞)

Question 34

a)  x-int (-1, 0) and (2,0).  y-int (0, 2/3)

b) Vertical asymptote: x = 3

c) f(x) → -∞, as x → 3⁻

   f(x) → +∞, as x → 3⁺

d) Domain: (-∞, 3) ∪ (3, ∞)

   Range: (-∞, 1] ∪ [9, ∞)

Question 35

a) No axis intercepts

b) Vertical asymptotes: x = -2 and x = 2.  Hole at (0, ¹/₄).

c) f(x) → -∞, as x → -2⁻

   f(x) → +∞, as x → -2⁺

   f(x) → +∞, as x → 2⁻

   f(x) → -∞, as x → 2⁺

d) Domain: (-∞, -2) ∪ (-2, 0) ∪ (0, 2) ∪ (2, ∞)

   Range: (-∞, 0) ∪ (¹/₄, ∞)

Step-by-step explanation:

Definitions

The x-intercepts are the points at which the curve crosses the x-axis, so when y = 0.The y-intercept is the points at which the curve crosses the y-axis, so when x = 0.The domain of a function is the set of all possible input values (x-values).The range of a function is the set of all possible output values (y-values).A vertical asymptote occurs at the x-value(s) that make the denominator of a rational function zero.A horizontal asymptote occurs at y = 0 if the degree of the numerator is less than the degree of the denominator.A hole occurs when a rational function has a factor with an x that is in both the numerator and the denominator.

Question 33

Given rational function:

[tex]g(x) =\dfrac{x - 2}{x^2 - 2x - 3}[/tex]

x-intercept

[tex]\begin{aligned}y=0 \implies \dfrac{x - 2}{x^2 - 2x - 3}&=0\\x - 2&=0\\x&=2\end{aligned}[/tex]

y-intercept

[tex]x=0 \implies \dfrac{0 - 2}{0^2 - 2(0) - 3}=\dfrac{2}{3}[/tex]

Vertical asymptotes

Set the denominator to zero and solve for x:

[tex]\implies x^2-2x-3=0[/tex]

[tex]\implies x^2-3x+x-3=0[/tex]

[tex]\implies x(x-3)+1(x-3)=0[/tex]

[tex]\implies (x+1)(x-3)=0[/tex]

[tex]\implies x+1=0 \implies x=-1[/tex]

[tex]\implies x-3=0 \implies x=3[/tex]

Horizontal asymptote

As the degree of the numerator is less than the degree of the denominator, there is a horizontal asymptote at y = 0.  

Holes

Factor the denominator:

[tex]g(x) =\dfrac{x - 2}{(x+1)(x-3)}[/tex]

There are no holes as there is no common factor in the numerator and the denominator.

End behaviour near the vertical asymptotes

f(x) → -∞, as x → -1⁻

f(x) → +∞, as x → -1⁺

f(x) → -∞, as x → 3⁻

f(x) → +∞, as x → 3⁺

Domain

As there are vertical asymptotes at x = -1 and x = 3, the domain is restricted:

Interval notation:  (-∞, -1) ∪ (-1, 3) ∪ (3, ∞)

Range

The range is unrestricted:

Interval notation:  (-∞, ∞)

Question 34

Given rational function:

[tex]k(x)= \dfrac{x^2 - x - 2}{x - 3}[/tex]

x-intercepts

[tex]\begin{aligned}y=0 \implies \dfrac{x^2 - x - 2}{x - 3}&=0\\x^2 - x - 2&=0\\x^2-2x+x-2&=0\\x(x-2)+1(x-2)&=0\\(x+1)(x-2)&=0\\\\x+1&=0 \implies x=-1\\x-2&=0 \implies x=2\end{aligned}[/tex]

y-intercept

[tex]x=0 \implies \dfrac{(0)^2 - 0 - 2}{0 - 3}=\dfrac{2}{3}[/tex]

Vertical asymptotes

Set the denominator to zero and solve for x:

[tex]\implies x-3=0[/tex]

[tex]\implies x=3[/tex]

Holes

Factor the numerator:

[tex]k(x)= \dfrac{(x+1)(x-2)}{x - 3}[/tex]

There are no holes as there is no common factor in the numerator and the denominator.

End behaviour near the vertical asymptote

f(x) → -∞, as x → 3⁻

f(x) → +∞, as x → 3⁺

Domain

As there is vertical asymptote at x = 3, the domain is rest:

Interval notation:  (-∞, 3) ∪ (3, ∞)

Range

The extreme points are (1, 1) and (5, 9).  Therefore, the range is restricted:

Interval notation:  (-∞, 1] ∪ [9, ∞)

Question 35

Given rational function:

[tex]f(x)= -\dfrac{x}{x^3 - 4x}[/tex]

x-intercepts

As the degree of the numerator is less than the degree of the denominator, there is a horizontal asymptote at y = 0.  Therefore, there are no x-intercepts.

y-intercept

Substitute x = 0 and solve for y:

[tex]x=0 \implies -\dfrac{0}{0(x+2)(x-2)}=\dfrac{0}{0}=\textsf{unde\:\!fined}[/tex]

Therefore, there is no y-intercept.

Factor the denominator:

[tex]f(x)= -\dfrac{x}{x(x+2)(x-2)}[/tex]

Cancel the common factor x:

[tex]f(x)= -\dfrac{1}{(x+2)(x-2)}[/tex]

Vertical asymptotes

Set the denominator to zero and solve for x:

[tex]\implies (x+2)(x-2)=0[/tex]

[tex]\implies x+2=0 \implies x=-2[/tex]

[tex]\implies x-2=0 \implies x=2[/tex]

Holes

Factor the denominator:

[tex]f(x)= -\dfrac{x}{x(x+2)(x-2)}[/tex]

As the numerator and denominator have a common factor of x, the function is not defined when x = 0. Therefore, there is a hole when x = 0.

To find the y-value of the hole, cancel the common factor x and input x = 0 into the resulting function:

[tex]x=0 \implies -\dfrac{1}{(0+2)(0-2)}=\dfrac{1}{4}[/tex]

Therefore, there is a hole at (0, ¹/₄).

End behaviour near the vertical asymptotes

f(x) → -∞, as x → -2⁻

f(x) → +∞, as x → -2⁺

f(x) → +∞, as x → 2⁻

f(x) → -∞, as x → 2⁺

Domain

As there are vertical asymptotes at x = -2 and x = 2, and a hole at (0, ¹/₄), the domain is restricted:

Interval notation:  (-∞, -2) ∪ (-2, 0) ∪ (0, 2) ∪ (2, ∞)

Range

As there is a hole at (0, ¹/₄) and a horizontal asymptote at y = 0, the range is restricted:

Interval notation:  (-∞, 0) ∪ (¹/₄, ∞)
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