Ask question

Ask question

All categories

r-ruslan [8.4K]

2 years ago

14

Suppose Meagan would like to know when the costs are equal between the two companies. a) Write an equation that shows the costs

are equal

1 answer:

nadezda [96]2 years ago

4 0

Let number of miles be x

<span>when is </span>
<span>.5x + 25 = .25x + 30 </span>
<span>times 4 </span>
<span>2x + 100 = x + 120 </span>
<span>x = 20 </span>

You might be interested in

A wrestler competes in 25 matches. Of those matches, he lost 5. What percent of the matches did the wrestler lose

Kitty [74]

5 over 25 = 1/5
1/5 = 20 %
Hope this helped :)

4 0

2 years ago

Read 2 more answers

Write the equation of the parabola in vertex form.vertex (0,2), point (1,-5)

charle [14.2K]

Y=a(x-h)^2+k
-5=a(1-0)^2+2
-5=a+2
-3=a

y=-3x^2+2

3 0

2 years ago

Read 2 more answers

How large a sample should be selected to provide a 95% confidence interval with a margin of error of 6? Assume that the populati

marshall27 [118]

Using the z-distribution, it is found that a sample of 171 should be selected.

<h3>What is a z-distribution confidence interval?</h3>

The confidence interval is:

$\overline{x} \pm z\frac{\sigma}{\sqrt{n}}$

The margin of error is:

$M = z\frac{\sigma}{\sqrt{n}}$

In which:

$\overline{x}$ is the sample mean.

z is the critical value.

n is the sample size.

$\sigma$ is the standard deviation for the population.

For this problem, the parameters are:

$z = 1.96, \sigma = 40, M = 6$

Hence we solve for n to find the needed sample size.

$M = z\frac{\sigma}{\sqrt{n}}$

$6 = 1.96\frac{40}{\sqrt{n}}$

$6\sqrt{n} = 40 \times 1.96$

$\sqrt{n} = \frac{40 \times 1.96}{6}$

$(\sqrt{n})^2 = \left(\frac{40 \times 1.96}{6}\right)^2$

n = 170.7.

Rounding up, a sample of 171 should be selected.

More can be learned about the z-distribution at brainly.com/question/25890103

#SPJ1

4 0

1 year ago

A savings account increases from $200 to $210 what is the percent increase of the savings in the account.

Illusion [34]

Answer:

5%

Step-by-step explanation:

10/200 × 100 = 5

hope this helps...

7 0

2 years ago

Explain how you could calculate the surface area of a<br> square pyramid.

lesya [120]

To find the surface area, use this square pyramid surface area formula: Square Pyramid Surface Area = 2 x B x S + B 2 B = Width of the Square Base S = Slant length of one of the triangular faces and is calculated from the height and base width by using the equation: S= The square root of [(.5B) 2 + Height 2] .

8 0

2 years ago

Read 2 more answers