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andre [41]
3 years ago
5

8. If you add one fifth of a number to that number itself, you get 42. What is the number?

Mathematics
1 answer:
anzhelika [568]3 years ago
6 0

Answer:

Be quiet

Step-by-step explanation:

Stop annoying people and go get a job

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Answer:

<h2>a = 400/21, b = 580/21</h2>

Step-by-step explanation:

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For b, we can use the Pythagorean theorem:

b^2=\left(\dfrac{400}{21}\right)^2+20^2\\\\b^2=\dfrac{160000}{441}+400\\\\b^2=\dfrac{160000}{441}+\dfrac{176400}{441}\\\\b^2=\dfrac{336400}{441}\to b=\sqrt{\dfrac{336400}{441}}\\\\b=\dfrac{\sqrt{336400}}{\sqrt{441}}\\\\b=\dfrac{580}{21}

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Investment of 1000 at 16% interest rate for 20 years
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