Answer
18ft
Work Step by Step
To find the solution, start with 20 ft and add the 3 ft rise, the 2 ft fall, the 1 ft fall, the 4 ft fall, and the 2 ft rise.
20+3+(-2)+(-1)+(-4)+2
23-2-1-4+2
21-1-4+2
20-4+2
16+2=18
Introductory Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-805-X
ISBN 13:
978-0-13417-805-9
Chapter 1 - Section 1.5 - Addition of Real Numbers - Exercise Set - Page 63: 78
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