Question 256164
"the slower bus which departs at 9:30 AM travels 5mi/h slower" ___ S + 5 = F


r * t = d


(S * 1) + (F * 3/4) = 90 ___ 4S + 3F = 360


substituting ___ 4S + 3S + 15 = 360 ___ 7S = 345 ___ S = 345/7


substituting ___ 345/7 + 35/7 = F ___ 380/7 = F