Question 747650
D=RT
The distance has 2 factors. The scooter trip (32T) & the train trip (64[7-T]). They have to be added to get the full 371 mile trip.
371=32T+64(7-T)
371=32T+64*7-64T
371=-32T+448
-32T=371-448
-32T=-77
T=-77/-32
T=2.4 HOURS FOR THE 32 MPH TRIP.
7-2.4=4.6 HOURS FOR THE 64 MPH TRIP.
PROOF:
371=32*2.4+64*4.6
371=76.8+294.4
371=371.2 (ROUNDING ERROR).