Answer:
8 hours
Step-by-step explanation:
set up your equation as y=mx+b. if she gets paid $20 already then that's your b. y= mx+ 20. x is your hours, so if she gets paid 2.5 with every hour then that would be your m. y=2.5x+20. if the sweater costs $40 and you already received $20 as your start up pay, then you only need to earn $20 more. you divide 20 by 2.5 and get 8. that means Amelia needs to work 8 hours to pay for the new sweater she wants. plug it in to double check your work,
40 = 8(2.5)+20
-20 -20
20 = 8(2.5)
20 = 20
-20 -20
=0
