Answer
$x\leq 4$ dollars per gallon.
Work Step by Step
Let the cost of gasoline per gallon be $x$.
The cost of gasoline was at most 4 dollars per gallon can be translated as:
$x$ is less than or equal to 4.
$x\leq 4$ dollars per gallon.
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 2 - Equations, Inequalities, and Problem Solving - 2.7 Solving Applications with Inequalities - 2.7 Exercise Set - Page 140: 24
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