An exterminator charges $80 to visit a home and $35 to spray each room if the total bill was $395 how many rooms were sprayed? Explain: first you have to find the total which in this situation is $395.
So we have to find the number of rooms that were sprayed so we dont need $80 anymore so what we wanna do is subtract 395 and 80 which you should get 315 .
then you have to divide 315 and 35 which your answer should be 9 which is 9 rooms were sprayed.

9 rooms

I hope this helps, have a wonderful day.​