Posted by Kay on Monday, December 6, 2010 at 4:04pm.
Use an inequality to solve the problem. Be sure to show the inequality and all of your work. A car rental company has two rental rates. Rate 1 is $63 per day plus $0.18 per mile. Rate 2 is $126 per day plus $0.09 per mile. If you plan to rent for one week, how many miles would you need to drive to pay less by taking Rate 2?

math  Reiny, Monday, December 6, 2010 at 4:44pm
let the number of miles driven be x
when is .09x + 126 ≤ .18x + 63 ?
times 100
9x + 12600 ≤ 18x + 6300
9x ≤  6300
x ≥ 700 
math  Terri Brown, Friday, May 20, 2011 at 8:26pm
x >700