Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 5 - Trigonometric Functions - 5.1 Angles - 5.1 Exercises - Page 504: 23


$(7x)^\circ=70^\circ$ $(11x)^\circ=110^\circ$

Work Step by Step

The sum of the two angle is a straight angle ($180^\circ$): $(7x)^\circ+(11x)^\circ=(18x)^\circ=180^\circ$ $x=10$ $(7x)^\circ=70^\circ$ $(11x)^\circ=110^\circ$
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