Answer
F
Work Step by Step
$2w+2l = 400$
$x=2w$,$y=2l$
$x+y=400$
$2x+2y =?$
$x+y+x+y=?$
$400+400=800$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 6 - Systems of Equations and Inequalities - Cumulative Test Prep - Multiple Choice - Page 409: 10
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