Answer
$\frac{3}{8}.$
Work Step by Step
By using the slope formula, the slope of the roof is:
$m=\frac{y_2-y_1}{x_2-x_1}=\frac{15}{40}=\frac{3}{8}.$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 2 Linear Equations and Functions - 2.2 Find Slope and Rate of Change - 2.2 Exercises - Problem Solving - Page 88: 47a
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