SOLUTION: One morning, Justin drove 3 hours before stopping to eat lunch at Chick-fil-A. After lunch, he increased his speed by 10 mph. If he completed a 450-mile trip in 8 hours of driving

Question 1174119: One morning, Justin drove 3 hours before stopping to eat lunch at Chick-fil-A. After lunch, he increased his speed by 10 mph. If he completed a 450-mile trip in 8 hours of driving time, how fast did he drive in the morning?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
3 hours in morning
5 in the afternoon
speed is x miles/hr in morning and distance therefore is 3x miles
in the afternoon, it is 5*(x+10) or 5x+50 miles
That sum, 8x mi/hr*hr+50mi=450 mi;
x=50 miles/hr for 3 hours (150 miles)
x+10=60 miles per/hour *5 hours or 300 miles
-
50 mi/hr
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