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3 years ago

If 7 9/7 n=7 3 then n is___

Mathematics

1 answer:

snow_tiger [21]3 years ago

8 0

Answer:

I hop answer is right very very hard question5

Step-by-step explanation:

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Tell whether the angles are adjacent or vertical. Then find the value of x.

soldier1979 [14.2K]

Adjacent : 53. Is the answer

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3 years ago

The given cube has a mass of 173 grams, what is it’s density

Tanzania [10]

Answer:

I think the density is 4cm.

Hope that helps you.

Step-by-step explanation:

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2 years ago

Find y when x=15 if y=6 when x=30

Verdich [7]

Y = 12 because you multiply x by two to get x2, which is 30, and multiply y by two to get 12 - this is wrong, the answer is three, i did the math backwards

3 0

3 years ago

Read 2 more answers

Jim has received scores of 72 72 and 77 77 on his first two 100 point tests. what score must he get on his third 100 point test

Alisiya [41]

77+72=149
149/2=74.5
through the process of elimination, I found that Jim needs to get an 88 or higher to receive an average of 79 or greater.

77+72+88=237
237/3=79

7 0

3 years ago

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard devia

gtnhenbr [62]

Answer:

$n=(\frac{2.58(58.2)}{1})^2 =22546.82 \approx 22547$

So the answer for this case would be n=22547 rounded up to the nearest integer

Step-by-step explanation:

Let's define some notation

$\bar X$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma=58.2$ represent the population standard deviation

n represent the sample size

$ME =1$ represent the margin of error desire

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =+1 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 99% of confidence interval now can be founded using the normal distribution. The significance would be $\alpha=0.01$ and the critical value $z_{\alpha/2}=2.58$ , replacing into formula (b) we got:

$n=(\frac{2.58(58.2)}{1})^2 =22546.82 \approx 22547$

So the answer for this case would be n=22547 rounded up to the nearest integer

3 0

3 years ago