Parking charges at superior parking garage or five dollars for the first hour and $1.50 for each additional 30 minutes if Margo has $12.50 what is the maximum amount of the time she will be able to park her car in the garage
30 min = 0.5 h
$1.50 for each additional 30 minutes means:
$1.5 / 30 min = $1.5 / 0.5 h = $3 / h
for each additional hours
x = the number of hours the car was parked more then 1h
The price of parking = $5 + x • $3
She has $12.50 so:
5 + 3 x = 12.5
Subtract 5 to bith sides
3 x = 7.5
x = 7.5 / 3
x = 2.5
She will be able to park her car in the garage first hour plus 2.5 hours.
She will be able to park her car in the garage for a maximum of 3.5 hours.