SOLUTION: A plain flies at a cruising speed of (x+4) kilometers per hour. At this rate, how long will it take to fly x2+11x+28 kilometers?

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Question 631023: A plain flies at a cruising speed of (x+4) kilometers per hour. At this rate, how long will it take to fly x2+11x+28 kilometers?
Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
A plain flies at a cruising speed of (x+4) kilometers per hour. At this rate, how long will it take to fly x2+11x+28 kilometers?
1/(x+4) * x^2+11x+28
1/(x+4) * (x+7)(x+4)
(x+7)(x+4)/(x+4)
(x+7) hours