SOLUTION: two cars pass on straight highway while traveling in opposite directions. one car is traveling 6 mph faster than the other car. after 1.5 hours the two cars will be 171 miles apart

Question 1116210: two cars pass on straight highway while traveling in opposite directions. one car is traveling 6 mph faster than the other car. after 1.5 hours the two cars will be 171 miles apart . find the speed for both cars.
Found 3 solutions by addingup, ikleyn, MathTherapy:
Answer by addingup(3677)   (Show Source): You can put this solution on YOUR website!
x + x+6 = 171
2x+6 = 171
2x = 165
x = 82.5
82.5/1.5 = 55 mph this is the speed of the other car.
One car is traveling 6mph faster than the other car: 55 + 6 = 61 mph
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
So there you have it:
One car: 61mph
The other: 55mph

Answer by ikleyn(52876)   (Show Source): You can put this solution on YOUR website!
.

Let x be the speed of the slower car, in miles per hour. Then the speed of the faster car is (x+6) mph. The distance equation is 1.5x + 1.5*(x+6) = 171 1.5x + 1.5x + 9 = 171 3x = 171 - 9 = 162 ====> x = = 54. Answer. The speed of the slower car is 54 mph. That of the faster car is 60 mph.

Solved.

Any other answer is   W R O N G.

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Answer by MathTherapy(10556)   (Show Source): You can put this solution on YOUR website!

two cars pass on straight highway while traveling in opposite directions. one car is traveling 6 mph faster than the other car. after 1.5 hours the two cars will be 171 miles apart . find the speed for both cars.

Let speed slower car�s speed be S
Then faster car�s speed = S + 6
We then get: 1.5S + 1.5(S + 6) = 171
1.5S + 1.5S + 9 = 171
3S = 162
S, or slower car�s speed =
Faster car�s speed:
This person "addingup" has had a lot of answers that DO NOT ADD UP. He's among many in this forum now that seems to have a "multitude" of
people who do not know what they're doing, and just continue to give wrong answers. I hope they'l quit soon!! I guess I don't have to tell
you to IGNORE that person's answers as it's obvious what the correct answers are.
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