First find the total shampoo time: 15 minutes / shampoo * 3 shampoos = 45 minutes. Then add the hosing off time to find the total cleaning time: 45 minutes + 10 minutes = 55 minutes.
This justifies what answer for what question? Q & A:
Nadine's dog rolls around in the mud. She spends 10 minutes hosing him off outside, then shampoos him three times, which takes 15 minutes per shampoo. How long does she spend cleaning her dog total?
55