Answer
perpendicular
Work Step by Step
2x+5y=20
5y=-2x+20
y=-$\frac{2}{5}$x+4
10x-4y=20
4y=10x-20
y=$\frac{5}{2}$x-5
These two lines have slopes that are opposite reciprocals of each other, therefore, the lines are perpendicular.
Intermediate Algebra: Connecting Concepts through Application
by Clark, Mark; Anfinson, Cynthia
Published by
Brooks Cole
ISBN 10:
0-53449-636-9
ISBN 13:
978-0-53449-636-4
Chapter 1 - Linear Functions - 1.5 Finding Equations of Lines - 1.5 Exercises - Page 77: 55
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