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2 years ago

11

Five students sold lemonade and earned a total of $21.30. If they equally split their earnings, how much would each student rece

ive?

1 answer:

Inga [223]2 years ago

4 0

Answer:

$4.26 each

Step-by-step explanation:

21.30 divided by 5 equals 4.26

(had to do it in words because I only have + - = )

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A population has a standard deviation of 5.5. What is the standard error of the sampling distribution if the sample size is 81?

VladimirAG [237]

Answer:

$\sigma = 5.5$

And we have a sample size of n =81. We want to estimate the standard error of the sampling distribution $\bar X$ and for this case we know that the distribution is given by:

$\bar X \sim N(\mu ,\frac{\sigma}{\sqrt{n}})$

And the standard error would be:

$\sigma_{\bar x}= \frac{\sigma}{\sqrt{n}}$

And replacing we got:

$\sigma_{\bar x}=\frac{5.5}{\sqrt{81}}= 0.611$

Step-by-step explanation:

For this case we know the population deviation given by:

$\sigma = 5.5$

And we have a sample size of n =81. We want to estimate the standard error of the sampling distribution $\bar X$ and for this case we know that the distribution is given by:

$\bar X \sim N(\mu ,\frac{\sigma}{\sqrt{n}})$

And the standard error would be:

$\sigma_{\bar x}= \frac{\sigma}{\sqrt{n}}$

And replacing we got:

$\sigma_{\bar x}=\frac{5.5}{\sqrt{81}}= 0.611$

4 0

3 years ago

What is the y-coordinate of the solution of the system of equations? {y=3x−262x−y=19

givi [52]

Answer:

<h2> y = -5</h2>

Step-by-step explanation:

y = 3x − 26

2x − y = 19

2x - (3x - 26) = 19

2x - 3x + 26 = 19

- x = - 7

x = 7

y = 3•7 -26 = 21 - 26 = - 5

6 0

3 years ago

Which angle is supplementary to angle # 3?

stealth61 [152]

Check the picture below.

4 0

2 years ago

I need help pleasse

aniked [119]

X= 30

I don’t know if this is correct or not

5 0

1 year ago

If the area of a rectangle is 83& and the width of a rectangle is 2&, what is the length of the rectangle?

zepelin [54]

Answer:

l=41.5

Step-by-step explanation:

Using the formula A=wl

l= $\frac{A}{w} }$ = $\frac{83}{2}$ =41.5

5 0

2 years ago