Answer
$$ \frac{23a}{2}+12 $$
Work Step by Step
We know that the perimeter is equal to the sum of all of the individual side lengths. Adding these side lengths and simplifying, we find:
$$4a+7+a+\frac{1}{2}a+5+a+2a+3a\\ \frac{23a}{2}+12 $$
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 4 - Polynomials - 4.4 Addition and Subtraction of Polynomials - 4.4 Exercise Set - Page 261: 60
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