Answer:
Olivia babysat for a total of 15 hours.
Step-by-step explanation:
8.50(h) + 12 = 139.50
In order to get a direct result of the hours she
worked, we have to subtract 12 on both sides:
8.50(h) + 12 - 12 = 139.50 - 12
In order to fine the value of time she spent, we have to divide the amount of money she got on both sides:
8.50(h) = 127.5
8.50 = 8.50
h = 15
Therefore, Olivia babysat for a total of 15 hours.
