An mp3 player costs $80. a student has a coupon for 1 4 off. the student saves $7 per week. assuming the price of the mp3 player does not change, how long will it take the student to save enough to buy it?

a) 8 weeks
b) 9 weeks
c) 11 weeks
d) 12 weeks

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x

(-5,-28)

i graphed to on desmos.