Answer
$0.03x+0.06y\leq20$
Work Step by Step
Let $x$ be the number of minutes of calls made within the US and $y$ be the number of minutes of calls made to Brazil. Then our inequality is: $0.03x+0.06y\leq20$
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 2 Linear Equations and Functions - 2.8 Graph Linear Inequalities in Two Variables - 2.8 Exercises - Problem Solving - Page 137: 43
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