Answer
12x + 17
Work Step by Step
To find the perimeter, we write it as a sum of the length of each side. Then, combine like terms.
7x + 8 + 5x + 9
= 7x + 5x + 8 + 9
= 12x + 17
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 1 - Introduction to Algebraic Expressions - 1.5 Addition of Real Numbers - 1.5 Exercise Set - Page 43: 85
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