Respuesta :
Answer:
THREE HOURS
Step-by-step explanation:
34.50-12=22.5
22.5/7.50=
=3
Answer:
 3 hours
Step-by-step explanation:
For h hours, the charges for Rosa's rental were ...
 34.50 = 12.00 + 7.50h
 22.50 = 7.50h . . . . . . . . . subtract 12.00
 22.50/7.50 = h = 3  . . . . . divide by the coefficient of h
Roas spent 3 hours on the lake.