Question 569716
b + c = 60 mi / 1 hr = 60 mph


b - c = 60 mi / 2.5 hr = 24 mph


adding equations ___ b + c + b - c = 60 + 24 ___ 2b = 84 ___ b = 42


substituting ___ (42) + c = 60 ___ c = 18