Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 5 - Linear Functions - Cumulative Test Prep - Multiple Choice - Page 355: 7


D) $w=\frac{P}{2}-ℓ$

Work Step by Step

To solve for the width, $w$ needs to be isolated on its own side of the equation. $P=2(ℓ+w)$ $P\div2=(2(ℓ+w))\div2$ $\frac{P}{2}=ℓ+w$ $\frac{P}{2}-ℓ=w$ This means that the answer is D, $w=\frac{P}{2}-ℓ$.
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