Answer
$perimeter\ is\ (6+3x)\ ft$
Work Step by Step
Perimeter is the sum of the lengths of the sides.
$5+x+(2x+1)\rightarrow$ combine like terms
$6+3x$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 3 - Section 3.1 - Simplifying Algebraic Expressions - Exercise Set - Page 171: 87
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