Answer:
a=7
b=5
Step-by-step explanation:
In equation A, c = 7
In equation B, d = 5
$550
5.5 % = 0.055
10,000 x 0.055=550
Answer is after 20 miles
10 +2.5x = 3x
10 = 3x-2.5x
10=0.5x
10/.5=x
x=20
At 20 miles they both have a cost of 60
