Algebra 2 Common Core

Published by Prentice Hall
ISBN 10: 0133186024
ISBN 13: 978-0-13318-602-4

Chapter 1 - Expressions, Equations, and Inequalities - 1-3 Algebraic Expressions - Practice and Problem-Solving Exercises - Page 23: 45


$x=\dfrac{84}{m}$ where x is the cost of gas per mile. If 200 is substituted to $m$, the cost per mile is $\$0.42$.

Work Step by Step

The cost per mile is: $\dfrac{84}{m}$ Per indicates that we are dividing. If he drove a total of 200 miles on one full tank, then he paid: $\dfrac{84}{200}=0.42$ dollars per mile The answer makes sense since $200(0.42) = 84$.
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