solve this problem and I will give u brainlist!

In order to solve a system by substitution, you want to isolate a variable in one equation and then substitute it into the other equation.

Given that;

To complete the sentence for solving the system of equation.

Now, We know that;

Once you have substituted the variable, you can solve for the remaining variable(s) and find the solution to the system.

Hence, In order to solve a system by substitution, you want to isolate a variable in one equation and then substitute it into the other equation.

Therefore, Option C is true.

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The pair of points to be used is k and M.

A line of best fit is a straight line which is used to show the relations among non-linear points in a scatter plot. Thus it evenly varies the points on its two sides. This is majorly used when dealing with a cartesian coordinate, or plotted points on a graph.

Considering the given scatter plot, it can be observed that points J, L, M and K on non-linear. Thus the straight line that can be used to as line of best fit is by joining point K and M.

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In a right-angle triangle, a sine function of an angle [tex]\theta[/tex] is equal to the opposite side to [tex]\theta[/tex] divided by hypotenuse.

[tex]\text{Sin} \ \theta = \dfrac{\text{Opposite side}}{\text{Hypotenuse}}[/tex]

[tex]\text{y = f(x)} \rightarrow \text{x}[/tex] in the domain of f. Trigonometric functions are periodic, therefore each range value is within the limitless domain values (no breaks in between). Since trigonometric functions have no restrictions, there is no inverse.

The inverse sine function (also called arcsine) is the inverse of sine function. Since sine of an angle (sine function) is equal to ratio of opposite side and hypotenuse, thus sine inverse of same ratio will give the measure of the angle. Let’s say [tex]\theta[/tex] is the angle, then:

[tex]\text{Sin} \ \theta = \dfrac{\text{Opposite side to} \ \theta}{\text{Hypotenuse}}[/tex]

[tex]\text{Or} \ \theta = \text{Sin-}1 \ \dfrac{\text{Opposite side to}\ \theta}{\text{Hypotenuse}}[/tex]

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The value of angle ADC is 131⁰.

The value of angle AOC is 262⁰.

The value of angle BAT is 21⁰.

The value of angle ADC is calculated as follows;

The value of the angle at center, AOC = 2 ∠CBA (angle at center is twice angle at circumference)

∠AOC = 2 x 131⁰

∠AOC = 262⁰

The value of arc angle ABC = 262⁰ (intersecting chord theorem)

The value of angle ADC is calculated as;

∠ADC = ¹/₂ arc ABC

∠ADC = ¹/₂ x 262⁰

∠ADC = 131⁰

Angle DAB = 180 - (20 + (131 - 20))

∠DAB = 180 - 131 = 49

The value of angle BAT is calculated as;

∠BAT = 90 - (20 + 49)

∠BAT = 21⁰

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The constant of proportionality between d and h is 3.75

Any function in which the dependent variable (y) is obtained by multiplying the independent variable (x) by a constant value is called the direct proportionality function. This function is also expressed in the form  [tex]( y = m * x)[/tex] and is more commonly called a linear function.

The value m is a constant and is known as the constant of proportionality or the slope of the line. It represents the inclination of the line to the abscissa axis, that is, the x-axis. If we talk about graphic representation, this linear function is a line with slope m that passes through the origin of coordinates, that is, the point 0 in x and 0 in y, which is the point (0,0).

Bethany finds the distance d with the help of equation d = 3.75*h, she travels this distance while walking for h number of hours.  When we compare it with the direct proportionality function y = m * x, then y is represented by the distance d, x is represented by the number of hours h, and slope m or the constant of proportionality is the number 3.75.

So, the constant of proportionality between d and h is 3.75.

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The correct answer is a. One standard deviation.

Question is about a bell-shaped distribution and the percentage of data within a certain number of standard deviations of the mean. A bell-shaped distribution will have approximately 68% of the data within one standard deviation of the mean.

Standard deviation is a statistic that measures the dispersion of a dataset relative to its mean and is calculated as the square root of the variance. The standard deviation is calculated as the square root of variance by determining each data point's deviation relative to the mean.

So, the correct answer is a. One standard deviation.

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Answer:

(3×2−∣∣∣−5 +12∣∣∣ )+(−3) 2 = -3/1 = -3

Step-by-step explanation:

Multiple: 3 * 2 = 6

Absolute value: abs(the result of step No. 1) = abs(6) = 6

Subtract: the result of step No. 2 - 5 = 6 - 5 = 1

Absolute value: abs(12) = 12

Multiple: the result of step No. 3 * the result of step No. 4 = 1 * 12 = 12

Absolute value: abs(the result of step No. 6) = abs(12) = 12

Exponentiation: (-3) ^ 2 = 9

Add: the result of step No. 8 + the result of step No. 9 = -12 + 9 = -3

Also yeah and just trust ig  Hope it helps if it did tell me cause if it fully did

Answer:

all yes

Step-by-step explanation:

The surface area of the given cylinder is 200.96 square centimeters.

Given that the radius of the cylinder is 4 cm and the height of the cylinder is also 4 cm,

The surface area of the cylinder can be found using the formula:

SA = 2πr² + 2πrh, where r is the radius of the circular base and h is the height of the cylinder.

Substitute given values into the formula to get:

SA = 2π(4)² + 2π(4)(4)

= 2π(16) + 2π(16)

= 32π + 32π

= 64π

= 64(3.14)

= 200.96

Therefore, the surface area of the cylinder is 200.96 square centimeters.

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The complete question is as follows

What is the surface area of the cylinder?

Here, the radius of the cylinder is 4 cm and the height of the cylinder is 4 cm

Apply the formula SA = 2πr² + 2πrh.

The population growth rate is given as follows:

k = 0.0213.

The exponential function modeling the population after t years is given as follows:

P(t) = P(0)e^(kt).

In which:

Considering the population in 2007, the initial population is given as follows:

P(0) = 46.8.

21 years later, we have that:

P(21) = 73.2.

Hence the rate is obtained as follows:

46.8e^(21k) = 73.2

e^(21k) = 73.2/46.8

21k = ln(73.2/46.8)

k = ln(73.2/46.8)/21

k = 0.0213.

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This value is the same as the value found in the z-table: P(X < 127) = 0.6915 The closest answer to this value is option (b) 0.6681.

We'll use the z-score formula and a standard normal table (z-table) to find the probability.

The given terms are: - Mean (μ) = 125 - Standard deviation (σ) = 4 - Target blood pressure (X) = 127

Step 1: Calculate the z-score using the formula: z = (X - μ) / σ z = (127 - 125) / 4 z = 2 / 4 z = 0.5

Step 2: Use a z-table to find the probability that corresponds to the z-score. In this case, the z-score is 0.5. The value found in the z-table for a z-score of 0.5 is approximately 0.6915.

Step 3: The probability that the mean blood pressure will be less than 127 is the area to the left of the z-score (0.5) in the standard normal distribution.

This value is the same as the value found in the z-table: P(X < 127) = 0.6915 The closest answer to this value is option (b) 0.6681.

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Answer:

y = 8 + x

350x + 70y = 1,400----->5x + y = 20

5x + 8 + x = 20

6x + 8 = 20

6x = 12

x = 2, y = 10

2 sliders, 10 onion rings

The formula for the nth partial sum of the series n(n-1) is Sn = n(n+1)(2n-1)/6 and the series diverges.

Part 1: The formula for the nth partial sum, Sn, for the series n(n-1), can be found by using the formula for the sum of the first n natural numbers, which is given by Sn = n(n+1)/2. To find the sum of n(n-1), we can rewrite it as n^2 - n and use the formula for the sum of the first n squares, which is given by n(n+1)(2n+1)/6. Therefore, the formula for Sn is Sn = n(n+1)(2n-1)/6.

Part 2: To determine whether the given series converges or diverges, we need to evaluate the limit of Sn as n approaches infinity. Taking the limit of the formula for Sn, we get lim Sn = lim [n(n+1)(2n-1)/6] = lim (2n^3/6) = lim (n^3/3) = inf. Since the limit of Sn is infinity, the series diverges.

In conclusion, the formula for the nth partial sum of the series n(n-1) is Sn = n(n+1)(2n-1)/6 and the series diverges as the limit of Sn approaches infinity. This means that the sum of the series does not converge to a finite value and grows without bound as n increases.

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Step-by-step explanation:

Shift to the L 7 units    ( x+7)^2

Shift down 4       (x+7)^2    - 4  

Answer: The data is skewed because most text messages are replied to and cause the number to be at least twice what it was originally.

Step-by-step explanation: The data is left-skewed.

The estimated salary for an employee with 18 years of experience is $65,856.46.

To find the estimated salary for an employee with 18 years of experience using the given regression equation, follow these steps:

1. Identify the regression equation: Estimated Salary = 21,640.90 + 2456.42 (Years of Experience)

2. Substitute the given years of experience (18 years) into the equation:

Estimated Salary = 21,640.90 + 2456.42(18)

3. Multiply 2456.42 by 18: 2456.42(18) = 44,215.56

4. Add 21,640.90 to the result from step 3: 21,640.90 + 44,215.56 = 65,856.46

The estimated salary for an employee with 18 years of experience is $65,856.46.

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Answer:

v=d/delta t

d=v×delta t

=266 000km/h×168h

=44,688,000.km

The effective interest method of amortization is a method used to allocate the cost of a bond over the bond's life, in order to determine the amount of interest expense to be recorded each period.

In the case of Bentley Corporation, since they issued $1,000,000 of 10-year, 8% bonds at 105, this means that they received $1,050,000 in cash from investors.

Since the market rate of interest was 7%, the bonds were sold at a premium, which means that the effective interest rate is less than the stated interest rate of 8%. The effective interest rate is the rate at which the present value of the bond's future cash flows equals the amount of cash received at the time of issuance.

Using the effective interest method of amortization, the premium of $50,000 will be amortized over the life of the bond, reducing the effective interest rate each year. The interest expense recorded on December 31, 2021, the first interest payment date, will be calculated as follows:

$1,050,000 x 7% = $73,500 (effective interest)
$73,500 - $80,000 (stated interest) = -$6,500 (amortization of premium)
$80,000 - $6,500 = $73,500 (interest expense)

The premium of $50,000 will be reduced by $6,500, leaving a balance of $43,500 at the end of the first year. This process will continue each year until the bond matures in 2031.

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Answer:166.2 feet^2

Step-by-step explanation:

By assuming that Pete's yard is a rectangle, we can get the perimeter by using an equation that looks like this:

perimeter = l+l+w+w

Where l = length, and w = width.

This is because you are adding the measures of every side together, which is the definition of the value of a perimeter.

Furthermore, to get the area of the figure, you would need to multiply 52.7 by 30.4, which would be 1602.08 feet^2

We cannot get Equation B from Equation A as they are fundamentally different.

Equation A, 5x = 3x, is a linear equation with variables on one side and constants on the other side. To solve this equation for x, we can subtract 3x from both sides to get:

5x - 3x = 2x

Therefore, the solution to Equation A is x = 0 or x = any other real number.

On the other hand, Equation B, 5 = 3, is a statement of equality between two constants. There is no variable in this equation to solve for, and it is always false since 5 is not equal to 3.

Thus, there is no way to derive Equation B from Equation A or vice versa.

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Synergy is obtained when the value created by two divisions operated separately and independently is greater than the value that would be created by two divisions cooperating. The given statement is False.

The statement is false. Synergy is a term used to describe the benefits that can be achieved when two or more parts of a business work together to create more value than they could on their own. In other words, when two divisions cooperate and work together, the combined value they create is greater than the value that would be created if they worked independently and separately.

For example, if a company has a marketing division and a sales division, these two divisions could work independently to achieve their goals. However, if they work together and share information, resources, and expertise, they can create more value by developing more effective marketing strategies that lead to increased sales. In this case, the combined value of the marketing and sales divisions working together is greater than the value they could create if they worked independently.

Therefore, it is incorrect to say that synergy is obtained when two divisions operate separately and independently to create greater value than they would if they cooperated.

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When a = 0.01 and n = 31, the Xict value for the Chi-Square Distribution is 53.672.

To find the values for Xict and Right using the Chi-Square Distribution Table, we need to follow these steps:

Step 1: Identify the degrees of freedom (df). In this case, since n=31, the degrees of freedom will be df = n-1 = 31-1 = 30.

Step 2: Identify the significance level (α). In this case, α = 0.01.

Step 3: Locate the row corresponding to the degrees of freedom in the Chi-Square Distribution Table.

Step 4: Locate the column corresponding to the significance level in the Chi-Square Distribution Table.

Step 5: Find the intersection of the row and column identified in steps 3 and 4. This value is your Xict.

For Part 1 of 5 (a), with α = 0.01 and df = 30, using a Chi-Square Distribution Table, you will find the Xict value as 53.672. This means that when a = 0.01 and n = 31, the Xict value for the Chi-Square Distribution is 53.672.

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A vector space is a collection of objects, called vectors, that can be added together and multiplied by scalars (usually real numbers or complex numbers) to produce new vectors, while satisfying a set of axioms or rules, such as associativity, commutativity, distributivity, and the existence of a zero vector and additive inverses.

The set of all triples of real numbers with the standard vector addition but with scalar multiplication defined by k(x, y, z) = (k+x, k*y, k*z) is not a vector space. This is because Axiom 8 fails to hold.

Axiom 8 states that 1 * (x, y, z) should equal (x, y, z) for any vector (x, y, z). However, with the given scalar multiplication, 1 * (x, y, z) = (1+x, 1*y, 1*z) = (x+1, y, z), which is not equal to (x, y, z). Therefore, this set does not form a vector space due to the violation of Axiom 8.

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The function g(x) increases faster than the function f(x).

We know, the quadratic function f(x) will be

f(x) = ax² + bx + c

At x = 1, f(x) will be 3

So,  a + b + c = 3 ...(1)

and x = 2, f(x) will be 6

4a + 2b + c = 6 ...  (2)

and, x = 3, f(x) will be 11

9a + 3b + c = 11 ...  (3)

On solving equations we get

a = 1, b = 0, and c = 2

So, the quadratic function will be

f(x) = x² + 2

Now, The exponential function g(x) will be given as

g(x) = abˣ

At x = 1, g(x) will be 3

ab = 3 .....(4)

and, x = 2, g(x) will be 9

ab² = 9 ...(5)

From equations 4 and 5 we get

a = 1 and b = 3

So, the exponential function will be

g(x) = [tex]3^x[/tex]

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The question is solved using two linear equations. By analyzing the money value and number of coins, it is determined that Adriel has 2 nickels and 5 dimes.

In this problem, you need to understand that a nickel is worth 0.05 dollars (or 5 cents) and a dime is worth 0.10 dollars (or 10 cents). Adriel has a total of $0.60. Define x as the nickels and y as the dimes. You can set up the following two equations based on the information:

If we multiply the second equation by 0.05, we get 0.05x + 0.05y = 0.35. Subtract this from the first equation, which gives 0.05y = 0.25 and solving this gives y = 5. Substituting y = 5 into x + y = 7, we get x = 2. Therefore, Adriel has 2 nickels and 5 dimes.

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Each coin toss is an independent event, meaning that the outcome of the previous toss does not affect the outcome of the next toss. Therefore, the probability of getting heads on the fifth toss is still 0.5.

The scenario you've described involves a series of independent events, which means the outcome of one toss does not affect the outcome of the others. In this case, you are interested in the probability of heads on the fifth trial after obtaining heads four times in a row.

Since the outcome of the fifth trial is independent of the previous four, the probability of getting heads on the fifth trial remains unchanged. The probability of obtaining heads or tails when flipping a penny is always 0.5 (or 1/2) for each side, as there are only two possible outcomes.

Therefore, the correct answer is:
a. 0.5

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Answer:

  (b)  ΔDEF ≅ ΔSRU

Step-by-step explanation:

Given point coordinates D(6, 4), E(5, 8), F(1, 2), you want the congruence statement for ∆DEF, given points R(-2, 4), S(-3, 0), U(2, -2) and the fact that ∆DEF is reflected across the y-axis and translated (3, -4).

The attached graph plots the given points. It is pretty clear that corresponding vertices are (D, S), (E, R), (F, U).

  ∆DEF ≅ ∆SRU

Reflection across the y-axis is described by ...

  (x, y) ⇒ (-x, y)

Translation right 3 and down 4 is described by ...

  (x, y) ⇒ (x +3, y -4)

Taken together, the transformation is ...

  (x, y) ⇒ (-x +3, y -4)

Applied to points D, E, F, we have ...

  D(6, 4) ⇒ D'(-3, 0) . . . . matches S

  E(5, 8) ⇒ E'(-2, 4) . . . . matches R

These two matches are sufficient to tell us that point F will be transformed to point U, and the congruence statement is ...

  ∆DEF ≅ ∆SRU

Answer:

ΔDEF ≅ ΔSRU

Step-by-step explanation:

The answer above is correct.

If Roland has Z-score for his test 0.6, the standard deviation for this set of test scores is 7.5

To find the standard deviation for this set of test scores, we can use the z-score formula:

Z-score = (X - μ) / σ

Where:
- Z-score is 0.6 (given)
- X is Roland's score of 70
- μ is the mean score of 65.5
- σ is the standard deviation we need to find

Now we can plug in the values and solve for σ:

0.6 = (70 - 65.5) / σ

Next, we can rearrange the equation to solve for σ:

σ = (70 - 65.5) / 0.6

Finally, calculate the standard deviation:

σ = 4.5 / 0.6

σ ≈ 7.5

The standard deviation for this set of test scores is approximately 7.5.

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Answer:

1431

Step-by-step explanation:

The number of unique connections between two phones can be found using the formula for combinations.

Since we want to find the number of ways to choose two phones out of 54 phones, we can use the following formula:

nCk = n! / (k! * (n-k)!)

where n is the total number of phones (54), and k is the number of phones we want to choose (2).

nCk = 54! / (2! * (54-2)!)

= 54! / (2! * 52!)

= (54 * 53) / 2

= 1,431

Therefore, there are 1,431 unique connections that can be made between two phones in the office building.

I swear I hope I did this correctly t-t

Answer: 1431

Step-by-step explanation: i took the quiz

The number of ways the student can pull 5 integers out of the bucket in increasing order is 15,504.

To determine this, we can use the combination formula, which calculates the number of ways to choose k objects from a set of n objects, regardless of order. In this case, we want to choose 5 integers out of a set of 20 integers in increasing order, which means we can use the combination formula with repetition: C(n+k-1, k-1).

Substituting in our values, we get: C(20+5-1, 5-1) = C(24, 4) = (24232221)/(4321) = 15,504.

Therefore, there are 15,504 ways for the student to pull 5 integers out of the bucket in increasing order.

It is important to note that the order of the integers matters when counting the number of ways in which they can be chosen. In this case, the integers must be chosen in increasing order, which means we cannot count combinations where the integers are chosen in a different order. For example, choosing 1, 2, 3, 4, and 5 is a valid combination, but choosing 5, 4, 3, 2, and 1 is not, since the integers are not in increasing order.

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