SOLUTION: Lois leaves at 8:00am traveling at 35 mph, traveling in the opposite direction,Clark leaves at 815 a.m. traveling at 40 mph. At what time will they be 140 miles apart

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Question 145310This question is from textbook
: Lois leaves at 8:00am traveling at 35 mph, traveling in the opposite direction,Clark leaves at 815 a.m. traveling at 40 mph. At what time will they be 140 miles apart This question is from textbook

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
35*x+40(x-.25)=140
35x+40x-10=140
75x=150
x=150/75
x=2 hour after Lois leaves they will be 140 miles apart.
proof:
35*2+40(2-.25)=140
70+40*1.75=140
70+70=140
140=140