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3 years ago

Which expression is equivalent to 8 (n − 2) A 8n – 2 B) 2n – 8 C 16n D) 8n – 16

Mathematics

2 answers:

frutty [35]3 years ago

6 0

Answer:

the answer is d

Step-by-step explanation:

distributive property

8 (n - 2) = 8n - 16

zmey [24]3 years ago

5 0

Answer

d

explanation

distributive property

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A family spends 20% of its monthly income on fuel. If they spend $324 a month on fuel, which is their monthly income?

nasty-shy [4]

Your answer is $1620.

To solve this, first look at what we're given. $324 is spent a month on fuel, and fuel is 20% of their income. Therefore, $324 is 20% of the family's income per month.

Now, to solve this, we're looking for 100% of the family's income. 20% is 1/5 of 100%, so therefore $324 is 1/5 of the family's full income.

To get 100%, then multiply 20% by 5 to get 100%, and therefore multiply $324 by 5 to get the full income.

$324 * 5 = 1620, or your answer.

Good luck!

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3 years ago

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3 years ago

The length of a store is 21 2/3 feet, and the area is 325 square feet, what is the width of the store?

Julli [10]

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3 years ago

-x + 48 = 17 what os the value of x

strojnjashka [21]

Answer:

x=31

Step-by-step explanation:

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3 years ago

Use the given level of confidence and sample data to construct a confidence interval for the population proportion p.

Molodets [167]

Answer:

The 95% confidence interval for the population proportion is (0.778, 0.884).

Step-by-step explanation:

We have to calculate a 95% confidence interval for the proportion.

The sample proportion is p=0.831.

The standard error of the proportion is:

$\sigma_p=\sqrt{\dfrac{p(1-p)}{n}}=\sqrt{\dfrac{0.831*0.169}{195}}\\\\\\ \sigma_p=\sqrt{0.00072}=0.027$

The critical z-value for a 95% confidence interval is z=1.96.

The margin of error (MOE) can be calculated as:

$MOE=z\cdot \sigma_p=1.96 \cdot 0.027=0.053$

Then, the lower and upper bounds of the confidence interval are:

$LL=p-z \cdot \sisgma_p = 0.831-0.053=0.778\\\\UL=p+z \cdot \sisgma_p = 0.831+0.053=0.884$

The 95% confidence interval for the population proportion is (0.778, 0.884).

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4 years ago