Question

A car rents for $40 per day plus 18¢ per mile. You are on a daily budge of $67. What mileage will allow you to stay within your budget?

Answer 1

Out of your $67 for the day, $40 of it goes to the rental before you even drive it out of the lot.  That leaves you $27 a day for mileage.

$27 / $0.18 per mile = 150 miles per day, tops.

Answer 2

$Daily\ budge:\\\ 67\\\\Subtract\ permanent\ cost\ of\ renting\ a \ car\ per\ day:\\\ \ 67-\ 40=\ 27\\\\To\ calculate\ amount\ of\ miles\ divide\ cost\ per\ mile\ by\ our\ rest-\ 27\\\\changing\ units:\\cost\ per\ mile\ - \ \ \18\ cents =0,18\ \\\\ \frac{27\ }{0,18\ }=150 \ miles\\\\ In\ one\ day\ 150\ miles\ can\ be\ made.$