Answer
$b = \frac{2A}{h}-a$
Work Step by Step
Area of a trapezoid (A) = $\frac{(a+b)h}{2}$
2A = (a+b)h
2A/h = a+ b
$b = \frac{2A}{h}-a$
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 1 - 1.3 - Modeling with Linear Equations - 1.3 Exercises - Page 99: 64
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