Answer
4
Work Step by Step
We know that the work on the 5th day cannot make her go over 20 hours. Thus, using x to represent the hours that she can work the 5th day and solving, we find:
$$20=3+2+5+6+x \\ 20=16+x \\ x=4$$
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 1-4 - Cumulative Review - Page 301: 37
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