Inish earns $6.25 for each car he washes. He always puts $25 of his weekly earnings into his college savings account. This week, Inish wants to have at least $45 spending money left after putting away his savings. What is the minimum number of cars he must wash? An inequality for the situation is 6.25x – 25 ≥ 45.

6.25x – 25 ≥ 45
6.25x ≥ 70
x ≥ 11.2
since .2 is not a whole car, we round up.
 the minimum number of cars he must wash is 12.
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