Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 1 - Equations and Inequalities - 1.2 Applications and Modeling with Linear Equations - 1.2 Exercises: 11

Answer

$b=90$ cm

Work Step by Step

The perimeter of a rectangle can be calculated as: $P=2a+2b$, where a and b are the width and the length of the rectangle. Here: $P=294$ cm $a=57$ cm $294=2\times 57+2b$ $294-114=180=2b$ $b=90$ cm
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