Answer
22 ft 6 in
Work Step by Step
$\ \ \ 12\ ft\ \ \ 7\ in$
$\underline{+\ \ 9\ ft\ 11\ in}$
$\ \ \ 21\ ft\ 18\ in$ = $22\ ft\ 6\ in$
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 9 - Section 9.4 - Linear Measurement - Exercise Set - Page 650: 30
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