How many roots, real or complex, does the polynomial 7 + 5x* - 3z? have in all?

The probability of observing an income between $70,000 and $90,000 for engineers at this computer company is 0.6217, or about 62.17%.

To solve this problem, we need to standardize the given income range using the standard normal distribution, which has a mean of 0 and a standard deviation of 1. We can do this by using the formula:

z = (x - μ) / σ

where x is the income, μ is the mean income, and σ is the standard deviation.

For the lower bound of $70,000, we have:

z₁ = (70,000 - 83,422) / 8,278 = -1.62

For the upper bound of $90,000, we have:

z₂ = (90,000 - 83,422) / 8,278 = 0.79

We can now find the probability of observing an income between $70,000 and $90,000 by calculating the area under the standard normal curve between z₁ and z₂.

We can use a standard normal distribution table or a calculator to find this probability, which turns out to be approximately 0.6217. This means that about 62.17% of engineers at this company earn an income within this range.

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Complete question is:

The salaries of engineers at a computer company are normally distributed with mean $83,422 and standard deviation $8,278. What is the probability of observing an income between $70,000 and $90,000?

There are 5 sheets of paper will she need to complete 10 problems.

We have to given that;'

Kendra is doing her math homework. For each problem, she uses 1/2 of a sheet of paper.

Hence, For complete 10 problems, number of sheets are,

⇒ 1/2 of 10

⇒ 1/2 x 10

⇒ 5

Thus, There are 5 sheets of paper will she need to complete 10 problems.

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The new vertices of the triangle after moving the triangle 5 units down, are A(1,-7), B(9,-7), and C(5,-3). So, correct option is B.

To determine the coordinates of the triangle after it is translated 5 units down, we need to subtract 5 from the y-coordinates of each vertex.

Let's start with vertex A(1,-2). If we subtract 5 from -2, we get -7. Therefore, the new coordinates of vertex A are (1,-7).

Next, let's look at vertex B(9,-2). Again, if we subtract 5 from -2, we get -7. So the new coordinates of vertex B are (9,-7).

Finally, let's consider vertex C(5,2). If we subtract 5 from 2, we get -3. So the new coordinates of vertex C are (5,-3).

In this case, we are moving the triangle 5 units down, which means that we are subtracting 5 from the y-coordinates of each vertex. This is a common transformation in geometry, and it's important to be familiar with it when working with shapes and figures in the Cartesian plane.

So, correct option is B.

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Between Weeks 3 and 4, the water level varied the greatest.

To determine which two weeks had the greatest change in water level, we need to find the difference between each pair of consecutive weeks and identify the largest difference.

Here are the differences between consecutive weeks:

Week 1 to Week 2: (1 3/8) - (-1 1/4) = 2 5/8

Week 2 to Week 3: 2 1/2 - 1 3/8 = 1 1/8

Week 3 to Week 4: (-1 5/8) - 2 1/2 = -4 1/8

Week 4 to Week 5: (-1 3/4) - (-1 5/8) = -1/8

The largest difference is between Week 3 and Week 4, with a difference of 4 1/8 inches.

Therefore, the water level changed the most between Week 3 and Week 4.

Note that the differences are calculated by subtracting the water level of the earlier week from the water level of the later week.

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It will take approximately 4 years for the amount in Dillon's bank account to grow to $2,000.

We use the formula for simple interest to solve this problem;

I = P × r × t

where;

I = the interest earned

P = the initial principal (balance) = $1,766

r = the interest rate (as a decimal) = 3.2% = 0.032

t = the time (in years) we need to find

We know that the interest earned is the difference between the final amount (balance + interest) and the initial principal (balance), so we can write;

Interest = Final Amount - Initial Principal

Plugging in the values, we get;

I = $2,000 - $1,766

I = $234

Now we can substitute the values of I, P, and r into the simple interest formula and solve for t;

234 = 1766 × 0.032 × t

Dividing both sides of the equation by (1766 * 0.032) to isolate t:

t = 234 / (1766 × 0.032)

t ≈ 4.19

So, it will take approximately 4.19 years for the amount in Dillon's bank account to grow to $2,000. Since time cannot be in decimal years, we round to the nearest whole year:

t ≈ 4

Therefore, it will take 4 years for the amount in Dillon's bank account to grow to $2,000.

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The choices that are equivalent to the expression 4√3 will be ✓48 and ✓24.✓2.

It is important to note that an expression is simply used to show the relationship between the variables that are provided or the data given regarding an information.

In this case, it is vital to note that they have at least two terms which have to be related by through an operator. Some of the mathematical operations that are illustrated in this case include addition, subtraction, etc.

4✓3 will be:

= ✓4² × ✓3

= ✓48

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Answer:

The total cost per month is $190.76 to the nearest cent.

Step-by-step explanation:

From the given table, the monthly service plan costing $52.00 is:

The base calling plan includes two lines.

Therefore, for 4 lines, we will need to pay for 2 additional lines per month:

⇒ $21.99 × 2 = $43.98 per month

If 3,487 minutes are used per month, then the overage of minutes is:

⇒ 3487 - 2000 = 1487 minutes per month

As the overage rate is $0.06 per minute, then the cost of the additional minutes is:

⇒ 1487 × $0.06 = $89.22 per month

Therefore, the total cost per month before tax is:

⇒ $52.00 + $43.98 + $89.22 = $185.20

To apply the federal tax of 3%, multiply the total cost by 1.03:

⇒ $185.20 × 1.03 = $190.756 = $190.76 (nearest cent)

Therefore, the total cost per month is $190.76 to the nearest cent.

Answer:

We can solve this problem using the following steps:

1. **Calculate the probability of being in each group.**

The probability of being in the binge drinking group is 44%.

The probability of being in the moderate drinking group is 37%.

The probability of being in the abstain group is 9%.

2. **Calculate the probability of being in the accident group.**

The probability of being in the accident group is 17% + 9% = 26%.

3. **Calculate the probability of being in the abstain group and having an accident.**

The probability of being in the abstain group and having an accident is the probability of being in the abstain group multiplied by the probability of having an accident, given that you are in the abstain group.

The probability of being in the abstain group is 9%.

The probability of having an accident, given that you are in the abstain group, is the probability of being in the accident group and being in the abstain group, divided by the probability of being in the abstain group.

The probability of being in the accident group and being in the abstain group is 9%.

The probability of being in the abstain group is 9%.

Therefore, the probability of having an accident, given that you are in the abstain group, is 9% / 9% = 1.

4. **Calculate the probability of having an accident and being in the abstain group.**

The probability of having an accident and being in the abstain group is the probability of being in the abstain group and having an accident.

The probability of being in the abstain group is 9%.

The probability of having an accident, given that you are in the abstain group, is 1.

Therefore, the probability of having an accident and being in the abstain group is 9% * 1 = 9%.

**Answer:**

The probability of having an accident and being in the abstain group is 9%.

that would be 5 pieces of cardboard needed

The calculated value of x if ∠A and ∠B are vertical angles is 13 degrees

From the question, we have the following parameters that can be used in our computation:

∠A = (2x − 2)

∠B = (3x − 15)

Since the ∠A and ∠B are vertical angles, then they are congruent angles

So, we have

3x - 15 = 2x - 2

Evaluate the like terms

So, we have

x = 13

Hence, the solution is x = 13

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A graph of triangle ABC is shown below.

A graph of triangle A'B'C, the image of ΔABC after a translation right 1, down 3 is shown below.

A graph of triangle A"B"C", the image of ΔABC after a dilation of 2 is shown below.

ΔA"B"C" does not represent a rigid motion because the pre-image and the image are not congruent.

By translating the pre-image triangle ABC vertically down 3 units and horizontally right 1 unit, the coordinates of the image of triangle A'B'C'D' include the following:

(x, y)                               →                  (x + 1, y - 3)

Coordinate A = (2, 3)   →    Coordinate A' = (2 + 1, 3 - 3) = (3, 0)

Coordinate B = (4, 0)   →    Coordinate B' = (4 + 1, 0 - 3) = (5, -3)

Coordinate C = (5, 4)   →     Coordinate C' = (5 + 1, 4 - 3) = (6, 1)

By applying a dilation with a scale factor of 2 centered at the origin, we have:

Coordinate A = (2, 3)   →    Coordinate A" = (4, 6)

Coordinate B = (4, 0)   →    Coordinate B" = (8, 0)

Coordinate C = (5, 4)   →     Coordinate C" = (10, 8)

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The area of the parallelogram can be found using the formula A = base × height:

A = 6 cm × 10 cm

A = 60 cm²

The area of a triangle is given by the formula A = 1/2 × base × height. We know the height is 5 cm and the area is also 60 cm² (since it is equal to the parallelogram). So, we can solve for the base:

60 cm² = 1/2 × base × 5 cm

Dividing both sides by 1/2 × 5 cm gives:

base = 24 cm

Therefore, the base of the triangle is 24 centimeters.

Answer:

24cm

Step-by-step explanation:

Answer:

  h(x) = 3·2^x

Step-by-step explanation:

You want the equation of the exponential curve h(x) = a·b^x when it goes through the points (0, 3) and (1, 6).

When x=0, the equation is ...

  h(0) = a·b^0 = a

We know that h(0) = 3, so a = 3.

When x=1, the equation is ...

  h(1) = 3·b^1 = 3b

We know that h(1) = 6, so 3b = 6, or b = 2.

The equation is h(x) = 3·2^x.

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Answer:3

Step-by-step explanation: Initial value = y-intercept

The percentage of the data that falls within 2 standard deviations of the mean is  B. 68%

From the question, we have the following parameters that can be used in our computation:

Percentage = 2 standard deviations

As a general rule:

The percentage of the data that falls within 2 standard deviations of the mean is 68%

This means that the correct option is (b) 68%

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Answer:

Step-by-step explanation:

m

2

−2m−8

Factor the expression by grouping. First, the expression needs to be rewritten as m

2

+am+bm−8. To find a and b, set up a system to be solved.

a+b=−2

ab=1(−8)=−8

Since ab is negative, a and b have the opposite signs. Since a+b is negative, the negative number has greater absolute value than the positive. List all such integer pairs that give product −8.

1,−8

2,−4

Calculate the sum for each pair.

1−8=−7

2−4=−2

The solution is the pair that gives sum −2.

a=−4

b=2

Rewrite m

2

−2m−8 as (m

2

−4m)+(2m−8).

(m

2

−4m)+(2m−8)

Factor out m in the first and 2 in the second group.

m(m−4)+2(m−4)

Factor out common term m−4 by using distributive property.

(m−4)(m+2)

The function rule for the graph is -2 ≤ x ≤ 1 , where x is the domain

Given data ,

Let the function be represented as f ( x )

Now , the value of f ( x ) is plotted on the graph

The values of the output represents the range of the function and the domain of the function is the input

So , the x values ranges from [ -2 , 1 ]

Hence , the function rule is domain ranges from -2 ≤ x ≤ 1

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The vertices of the feasible region is (4, 3)

From the question, we have the following parameters that can be used in our computation:

x + y ≤ 7

x - 2y ≤ -2

x ≥ 0

y ≥ 0

Express as equations

So, we have

x + y = 7

x - 2y = -2

Subtract the equations

3y = 9

So, we have

y = 3

Next, we have

x + 3 = 7

This gives

x = 4

Hence, the vertex of the feasible region is (4, 3)

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Step-by-step explanation:

1/3 ÷ 3

=  1/3 ÷ 3/1

= 1/3  X  1/3  =  1/9

Similarly

1/4 ÷ 5   =   1/4  X  1/5 = 1/20

It will take 5 seconds for the object to hit the ground

From the question, we have the following equation that can be used in our computation:

-16r^2 + 400 = 0

So, we have

- 16r^2 = -400

Divide by -16

This gives

r^2 = 25

Take the square root of both sides

r = 5

Hence, the number of seconds is 5

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Answer:

The probability of guessing the first genre correctly is 1/10. After guessing the first genre, the probability of guessing the second genre correctly is 1/9. Similarly, the probability of guessing the third genre correctly is 1/8. Therefore, the probability of guessing the top 3 genres correctly and in the correct order is:

1/10 * 1/9 * 1/8 = 1/720

So the exact probability is 1/720, which is already reduced to its simplest form.

The Vector form is v = 11i + 0j.

We have,

P₁ =(-6,5), P2 = (5,5)

If we have the point p1 and p2 then the vector form p1 -> p2 is

v = p2 - p1

v = [ p(2x) - p(1x)) i + [ p (2y) - p(1y)] j

v = (5 - (-6)) i + (5 - 5)j

v = 11i + 0j

v = 11 i

Thus, the vector form is v = 11i + 0j.

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Answer:

t = 6.8

Explanation:

We know that A is at 1, B is at 10, so that is where we place those two.

First, we need to know what 2/3 of 10 is because the distance between A and B is 10.

Solving 2/3 of 10:

_____________________

- Divide 10 by the denominator, 3

         10 ÷ 3 = 3.3333......

- Multiply 3.3333..... by 2

         3.3333..... x 2 = 6.6666666666667

            or about 6.8 if we round up, which is prefered in these scenarios

Now that we know what 2/3 of 10 is, we can use that number as where to put it on the number line.

So t = 6.8

Hope this helps :)

Answer:

second option

Step-by-step explanation:

the volume of a cone is calculated as

[tex]\frac{1}{3}[/tex] πr²h

the volume of a sphere is calculated as

[tex]\frac{4}{3}[/tex] πr³

then the volume of a hemisphere is

[tex]\frac{1}{2}[/tex] × [tex]\frac{4}{3}[/tex] πr³ = [tex]\frac{2}{3}[/tex] πr³

then the volume (V) of the composite solid is

V = [tex]\frac{1}{3}[/tex] πr²h + [tex]\frac{2}{3}[/tex] πr³

By analyzing the end behavior of the function we can see that the correct options are A and D.

Here we have the exponential function:

[tex]F(x) = 2^x[/tex]

This is an exponential growth, this means that as x increases also does the function, then the end behavior of the function is:

as x → ∞, f(x) → ∞

And when x is a really large negative number, the function tends to zero, then we have:

as x →-∞, f(x) → 0

Then the correct options are A and D.

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The simplified expression for the difference in the area of circle A and B is 12π/(x+2)²

A circle is simply a round shape that has no corners or line segments. The area of a circle is expressed as;

A = πr²

The circumference of a circle = 2πr

for circle A;

8π/x+2 = 2πr

r = 8π/x+2 × 1/2π

r = 4/x+2

area = πr² = (4/x+2)²π

for circle B

4π/x+2 = 2πr

r = 4π/x+2 × 1/2π

r = 2/2x+2

area =( 2/2x+2)²π

difference = (4/x+2)²π - ( 2/x+2)²π

= π/(x+2)²( 4²-2²)

= π/(x+2)²(16-4)

= 12π/(x+2)²

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The students error is in step 3 and the correct solution is g(x) = 2x² + 4x - 4

From the question, we have the following parameters that can be used in our computation:

The steps to solve the expression

From step 2 to step 3, we have

g(x) = 2(x + 1)(x + 1) - 6

g(x) = 2(x² + 1x + 1) - 6

The step 3 is incorrect

Because when the expression is expanded, we have

g(x) = 2(x² + 2x + 1) - 6

This gives a solution of

g(x) = 2x² + 4x - 4

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Answer:yes, it’s a function, domain is all real # range all real #

Step-by-step explanation:

The match of the given words as per the definition of the terms related to data set is as follow.

1 → g

2 →c

3 → b

4 → d

5 → f

6 → a

7 → e

The description of the each word as per the definition is ,

Mean represents the average of the data.

1→g

Spread represents the similarity or variability of  the set of observed values of the data.

2→c

Center represents the middle value of the data set.

3→ b

Shape represents the values of the data set when plotted on the graph.

4 → d.

Median represents the middle value of the data set after arranging in ascending or descending order.

5 →f

Distribution represents measure of all the values of the data set spread.

6→a

variability represents the set of such values which satisfies the statistical question or relation.

7 → e.

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