Algebra
posted by Kia .
Parking in a student lot cost $1 for the first half hour and $1.25 for each hour thereafter. A partial hour is charge the same as a full hour is charge the same as a full hour. What is the longest time that a student can park in this lot for $9.

After half hour studen have 9  1 = 8 $
x = 8 / 1.25 = 6.4 h
A partial hour is charge the same as a full hour so x = 6 h
0.5 + x = 0.5 + 6 = 6.5 h 
Parking in a student lot costs $1 for the first half hour and $1.50 for each hour thereafter. A partial hour is charged the same as a full hour. What is the longest time that a student can park in this lot for $7? The longest time is [ ] hour (s) simplify your answer