Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Section 1.7 - Modeling with Equations - 1.7 Exercises - Page 76: 49

Answer

4 in

Work Step by Step

2(20+2x)+2(15+2x)=102 40+4x+30+4x=102 70+8x=102 8x=32 x=4
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