College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter 1 - Equations and Inequalities - Exercise Set 1.3 - Page 135: 65

Answer

$a=\frac{2A}{h}-b$; area of a trapezoid formula

Work Step by Step

Multiply each side by $2$ and divide each side by $h$. Then subtract $b$ from each side. $A=\frac{1}{2}h(a+b)$ for $a$ $\frac{2A}{h}=a+b$ $a=\frac{2A}{h}-b$ This is the formula for the area of a trapezoid.
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