Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 1, Equations and Inequalities - 1.5 Use Problem Solving Strategies and Models - 1.5 Exercises - Skill Practice - Page 37: 9



Work Step by Step

Given Information: perimeter formula is $P=2l+2w$. $P=100$ meters, $l=30$ meters, and $w$ is unknown. $P=2l+2w$ When we substitute in the values for $P$ and $l$: $100=(2\times30)+(2w)=60+2w$ $40=2w$ $w=20$
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