Question 310103
D=RT
630=30(T-4)+45T
630=30T-120+45T
75T=630+120
75T=750
T=750/75
T=10 HOURS AFTER MARGARET LEFT THEY WILL MEET.
PROOF:
630=30(10-4)+45*10
630=30*6+450
630=180+450
630=630