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3 years ago

Help help help help help help help MATH MATH

Mathematics

1 answer:

kondaur [170]3 years ago

3 0

Answer:

Step-by-step explanation:

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One number is 8 times as large as another. Their difference is 21. What is the larger number?

tigry1 [53]

<h3>Answer: 24</h3>

Explanation:

x = smaller number

8x = larger number, since it's 8 times larger than the smaller

8x-x = 7x = difference of the numbers

That difference is 21, so we can say 7x = 21 which solves to x = 3

The smaller number is 3 and the larger is 8x = 8*3 = 24

As a check: 24-3 = 21, which confirms the answer.

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3 years ago

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Bryn invested $2700 into an account that grows at a 4% annual interest rate. If she made no additional deposits of withdrawals o

dsp73

Answer: are their any options or?

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Barry found a computer at Staples for $989. A week later, the computer went on sale for $849. What

JulijaS [17]

Barry found a computer at Staples for $989. A week later, the computer went on sale for $849. The percentage change is 14.156 % decrease

<em><u>Solution:</u></em>

Given that Barry found a computer at Staples for $989

A week later, the computer went on sale for $849

To find: percent of change

Percent change is the extent to which a variable gains or loses value. The figures are arrived at by comparing the initial (or before) and final (or after) quantities according to a specific formula.

<em><u>THE PERCENT CHANGE IS GIVEN AS:</u></em>

$\text{ percent change } =\frac{\text { final value - initial value }}{\text { initial value }} \times 100$

If the result is positive, it is percentage increase

If the result is negative, it is percentage decrease

Here initial value = 989 and final value = 849

Substituting the values in above formula,

$\begin{aligned}&\text { percent change }=\frac{849-989}{989} \times 100\\\\&\text { percent change }=-0.14155 \times 100=-14.156 \%\end{aligned}$

Here negative sign denotes percentage decrease

Thus percentage change is 14.156 % decrease

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