Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 1 - 1.7 - Linear Inequalities in One Variable - 1.7 Exercises - Page 138: 90

Answer

$90 \leq r \leq 153$

Work Step by Step

r = 220-40 =180 (Find r by putting A = 40 into the given equation) Take 50% and 85% of r which is 90 and 153 respectively. Thus formulate the inequality using the given description. $90 \leq r \leq 153$
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