Question 313919
D=RT
D=8T
D=10T-5
8T=10T-5
8T-10T=-5
-2T=-5
T=-5/-2
T=2/5 
T=2.5 HOURS THEY WILL BE 5 MILES APART.
PROOF:
8*2.5=10*2.5-5
20=25-5
20=20