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mixer [17]
3 years ago
10

PLZ HELP I GIVE BRAINLIST!!

Mathematics
2 answers:
Nadusha1986 [10]3 years ago
5 0

well, I think you mean what is y.

The Answer is

y = 5

Because...

3+2y=13

so if you minus three from 3 and 13 u get

2y = 10

10/2 = 5

sooo y = 5

Tom [10]3 years ago
4 0

Answer:

5

Step-by-step explanation:

X + 2y = 13

Since x = 3

3 + 2y = 13

2y = 13 - 3

2y = 10

Divide both sides by 2

Y = 5

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3 years ago
What is the answer to 5m + 30 = 60
Keith_Richards [23]

Answer:

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Step-by-step explanation:

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3 years ago
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estim
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Answer:

n=\frac{0.5(1-0.5)}{(\frac{0.025}{1.28})^2}=655.36  

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Step-by-step explanation:

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 80% of confidence, our significance level would be given by \alpha=1-0.80=0.20 and \alpha/2 =0.10. And the critical value would be given by:

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Solution to the problem

The margin of error for the proportion interval is given by this formula:  

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Since we don't have prior info for the proportion of interest we can use \hat p=0.5 as estimator. And on this case we have that ME =\pm 0.025 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.025}{1.28})^2}=655.36  

And rounded up we have that n=656

5 0
3 years ago
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