Answer:
Step-by-step explanation:
let x be the number of rides
y is the total cost
the model for cost for people who use coupon is given as
y=1.5x+30--------1
for people without coupon
y= 50x---------2
equating 1 and 2 we can find x
50x=1.5x+30
collect like terms
50-1.5x=30
-1.5x=30-50
-1.5x=-20
x=20/1.5
x=13.33
The number of times in a month the bus must be used so that the total monthly cost without the coupon book is the same as the total monthly cost with the coupon book is 13.33