Kazan recycles 9 plastic bags every week. which expression shows the total number of plastic bags he recycles in w weeks?
9w
w over 9
9 + w
9 + 9w

9w

Because you want to find out how many bags he recycles in w weeks.

example:  lets say we wanted to know how many bags Kazan recycles in 5 weeks.  If he recycles 9 bags a week, for 5 weeks, we would have 9*5.  so you need to use the equation 9*w