Elementary Geometry for College Students (7th Edition)

Published by Cengage
ISBN 10: 978-1-337-61408-5
ISBN 13: 978-1-33761-408-5

Chapter 10 - Review Exercises - Page 494: 11a



Work Step by Step

x+3y = 6 y = $\frac{-x}{3}$ + 2 3x-y = -7 y=3x+7 The equations have a slope whose product is -1 therefore the lines are perpendicular.
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