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3 years ago

5 miles converted to kilometers

Mathematics

2 answers:

Advocard [28]3 years ago

4 0

Answer:

8.04672

Step-by-step explanation:

For each mile you have 1.609 kilometers hope this is helpful.

strojnjashka [21]3 years ago

3 0

Answer:

your answer would be 8.04672

Step-by-step explanation:

cause if you multiply 5 x 1.609 you should get the answer you need which is 8.04672 kilometers

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It is given that y varies inversely as x^2. If x is decreased by 50%, find the percentage change in y.

vova2212 [387]

Answer:

300%

Step-by-step explanation:

Given

$y\ \alpha\ \frac{1}{x^2}$

Required

Find the percentage change in y when x decreased by 50%

First, convert to equation

$y\ = \ \frac{k}{x^2}$

Where k is the constant of proportionality

When x decreased by 50%

$Y = \frac{k}{(x - 0.5x)^2}$

$Y = \frac{k}{(0.5x)^2}$

$Y = \frac{k}{0.25x^2}$

Expand

$Y = \frac{1}{0.25} * \frac{k}{x^2}$

Substitute $\frac{k}{x^2}$ for y

$Y = \frac{1}{0.25} * y$

$Y = 4 * y$

$Y = 4 y$

The percentage change is then calculated as:

$\%Change = \frac{Y - y}{y} * 100\%$

$\%Change = \frac{4y - y}{y} * 100\%$

$\%Change = \frac{3y}{y} * 100\%$

$\%Change = 3 * 100\%$

$\%Change = 300\%$

<em>The percentage in y is 300%</em>

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Answer:

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Step-by-step explanation:

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mars1129 [50]

I hope this helps you

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