Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Chapter 1 - Review Exercises: 13



Work Step by Step

1. The sum of the angles in the trinagle is 180 degrees-> then construct following equation. (5x+5)+(4x)+(4x-20)=180 13x-15=180 13x=175 x=15 2. Plug x value in 5(15)+5=80 4(15)=60 4(15)-20=40
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