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3 years ago

Help with number one!! Explain how you did it please!! Thank you.

Mathematics

1 answer:

Usimov [2.4K]3 years ago

3 0

Answer:

x=2, x=-3

Step-by-step explanation:

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X + 2 = 2x +1<br>what's x

LekaFEV [45]

X + 2 = 2x + 1
2 - 1 = 2x - x
1 = x
x = 1

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there are 30 businesses with 4 executive s each fornthe new office building each. business needs one office for each of its exec

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the ratio between executives to offices is 4:1440.

I hope this helps and I hope this is the answer you need.

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4 years ago

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NUMBER 4 PLZ ONLY HAVE 5 MINUTES TO ANSWER OR I FAIL!!!!!!

erastovalidia [21]

Too bad lol potatos looking as s s s

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3 years ago

You are trying to estimate the average amount a family spends on food during a year. In the past the standard deviation of the a

svetoff [14.1K]

Answer:

$n=(\frac{2.58(1000)}{50})^2 =2662.56 \approx 2663$

So the answer for this case would be n=2663 rounded up to the nearest integer

Step-by-step explanation:

We have the following info:

$ME = 50$ margin of error desired

$\sigma = 1000$ the standard deviation for this case

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 =50 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 is $\alpha=0.01$ . And for this case would be $z_{\alpha/2}=2.58$ , replacing into formula (b) we got:

$n=(\frac{2.58(1000)}{50})^2 =2662.56 \approx 2663$

So the answer for this case would be n=2663 rounded up to the nearest integer

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3 years ago

Which ratio forms a proportion with 14/42

NeX [460]

It could be anything with same (equal ) results,
We can reduce it or multiply a constant number,
14/42 = 1/14 = 2/28

In short, Your Answer would be 1/14

Hope this helps!

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