Mom pays $116 each week for groceries plus $28 for each fast-food dinner. She has $200 to spend each week for all the family's food. Which equation can mom use to find f, the number of times fast-food can be bought, when exactly $200 is spent on food for the week?

A) 28 + 116 f = 200

B) 116 + 28 f = 200

C) 28 f = 200

D) 116 f = 200

So 116 is fixed since she only buys groceries once

the 28 dollares can be spent many times since it is per dinner and there are 1 dinner per night and 7 nights per week so

cost of groceries+cost of fast foods=total cost=200

cost of groceries stays at 116

cost of fast food=cost per dinner times number of dinners

number of diners=f so

116+28 times f=200

116+28f=200

answer is B