Answer:
Step-by-step explanation:
Part A
Cost Mail Order = 0.15x + 2.70
Cost Local = 0.25x
Part B
0.25x = 0.15x + 2.70 Subtract 0.15 from both sides
0.25x-0.15x = 0.15x-0.15x + 2.70
0.1x = 2.70 Divide by 0.1
0.1x/0.1 = 2.7/0.1
x = 27
Part C
Use the local store under 27
Use either if 27 need to be developed
Use the Mail order if the number is greater than 27
