Question 161899
D=RT
550=5X+5(X+2)
550=5X+5X+10
10X=550-10
10X=540
X=540/10
X=54 MPH FOR THE SLOWER CAR.
54+2=56 FOR THE FASTER CAR.
PROOF:
550=5*54+5*56
550=270+280
550=550