Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 2 - Section 2.5 - An Introduction to Problem Solving - Exercise Set: 29

Answer

800 miles

Work Step by Step

The cost for the weekly rental is represented by the formula $200+0.15x$, where x is the number of miles driven. Solve for x when the rental charge is 320. $320=200+0.15x$ Use the addition property of equality to subtract 200 from each side of the equation. $320-200=200+0.15x-200$ Simplify. $120=0.15x$ Use the multiplication property of equality to divide each side of the equation by 0.15. $120\div0.15=0.15x\div0.15$ Simplify. $800=x$
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