Answer
$y=10$
Work Step by Step
1. Set up a proportion
$\frac{6}{9}=\frac{y}{15}$
2. Solve for y:
$9y=90$
$y=10$
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 - Quiz (Sections 1.1-1.2) - Page 21: 10b
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