Answer:
The flat fee is 20 and the rate per mile is 1.3
Step-by-step explanation:
The equation for the cost of the truck is
C = ym +x where y is the cost per mile and x is the fee
Carl
215 = y*150+ x
Lisa
176 = 120y + x
Subtract the two equations to eliminate x
215 = 150y+x
-176 = -120y -x
--------------------------
39 = 30y
Divide by 30
39/30 = 30y/30
1.3 = y
Now find x
215 = 150 * 1.3 +x
215 =195 +x
Subtract 195 from each side
215 -195 =x
20 =x
The flat fee is 20 and the rate per mile is 1.3
