Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 6 - Systems of Equations and Inequalities - Common Core Cumulative Standards Review - Selected Response - Page 413: 10


Answer F

Work Step by Step

Martin used 400 ft of fencing to enclose a rectangular area in his backyard: $P=2(l+w)=400 \rightarrow l+w=200$ Isabella wants to enclose a similar area that is twice as long and twice as wide as the one in Martin's backyard. $P=2(2l+2w)$ $P=4(l+w)$ $P=4 \times 200$ $P=800$ ft The correct answer is F.
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