Answer
$30^{\circ}$
Work Step by Step
1. The interior angles of a triangle have a sum of 180 degrees
60+90+y=180
150+y=180
y=30
2. Repeat with another triangle, insert value of y:
30+90+x+y=180
150+x=180
x=30
Trigonometry (10th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671775
ISBN 13:
978-0-32167-177-6
Chapter 1 - Review Exercises - Page 40: 5
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