Answer
126
Work Step by Step
Using the equation for the area of a trapezoid:
$$ A =\frac{1}{2}\frac{b_1+b_2}{h}\\ A =\frac{1}{2} \frac{12+16}{9} \\ A=126$$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 10 Counting Methods and Probability - 10.2 Use Combinations and the Binomial Theorem - 10.2 Exercises - Mixed Review - Page 697: 57
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