Complete question :
Mary earned $35.00 for walking her neighbor's dogs. Mary charged a flat fee of $5.00 to walk the dogs. Mary also charged $2.50 for each hour she walked the dogs. For exactly how many hours did Mary walk her neighbor's dogs?
Answer:
12 hours
Step-by-step explanation:
Given that:
Mary's charge rate :
Flat fee = $5
Amount charged per hour (hourly charge) = $2.50
Amount earned = $35
Hence,
Amount earned = flat fee + (hourly charge * number of hours)
Let number of hours = h
35 = 5 + 2.50h
35 - 5 = 2.50h
30 = 2.50h
h = 30/2.5
h = 12
Hence, Mary walked her neighbor's dog for 12 hours
