SOLUTION: A plane flies at a cruising speed of (x+40) kilometers per hour. At his rate, how long will it take to fly x²+,11x+28?

Question 1163525: A plane flies at a cruising speed of (x+40) kilometers per hour. At his rate, how long will it take to fly x²+,11x+28?

Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(52788)   (Show Source): You can put this solution on YOUR website!
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A plane flies at a cruising speed of (x+40) kilometers per hour. At his rate, how long will it take to fly x²+,11x+28?
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When it is written in the form   x^2+,11x+28,   as in your post, it makes no sense.

Learn how to write your formulas correctly and be more accurate next time.

Answer by josgarithmetic(39618)   (Show Source): You can put this solution on YOUR website!
One would assume the comma was a mistake and that "kilometers" was accidentally omitted.

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A plane flies at a cruising speed of (x+40) kilometers per hour. At his rate, how long will it take to fly x²+11x+28 kilometers?
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A plane flies at a cruising speed of R kilometers per hour. At his rate, how long will it take to fly D kilometers?
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If for time x, and known speed R and known distance D, then .

Your example, the time in hours would be .
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