Question 883677: 2 cars started from the same point and traveled on a straight course in opposite directions for exactly 2 hrs at which time they were 208 miles apart. If one card traveled 8 miles per hour faster than the other car ,what was the avg speed of each car for the 2 hr trip?
Answer by JulietG(1812)   (Show Source):
You can put this solution on YOUR website! (A + B)=154 (half of 208 since it's 2 hours)
A=B+8
Substitute the value of A from the second equation into the first
A+B=154
(B+8)+B=154
2B+8=154
Subtract 8 from each side
2B=146
Divide each side by 2
B=73
.
If B is 73, then A is 73+8, or 81.
Let's check.
In two hours, B drove 73*2 miles, or 146
In two hours, A drove 81*2 miles, or 162
146+162=208
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