Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10:
ISBN 13:

Chapter 5 - Ratio and Proportion - Mixed Review Exercises - Page 374: 3

Answer

$x=128$

Work Step by Step

We can set the cross products of the given proportion equal to each other and then solve for the unknown variable. $64\times20=10\times x$ $1280=10x$ Divide both sides by 10. $\frac{1280}{10}=\frac{10x}{10}$ $x=128$
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