SOLUTION: Lucas is running a race. He runs the first 800m at x m/s. He slows down by 3m/s for the final 400.His total time is 130 seconds. Find x.

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Lucas is running a race. He runs the first 800m at x m/s. He slows down by 3m/s for the final 400.His total time is 130 seconds. Find x.       Log On


   

Question 1095762: Lucas is running a race. He runs the first 800m at x m/s. He slows down by 3m/s for the final 400.His total time is 130 seconds. Find x.
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617) About Me  (Show Source):
Answer by MathTherapy(10552) About Me  (Show Source):
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Lucas is running a race. He runs the first 800m at x m/s. He slows down by 3m/s for the final 400.His total time is 130 seconds. Find x.
There's absolutely nothing wrong with the problem.

With x being average speed during 1st leg, the equation you need is: matrix%281%2C3%2C+800%2Fx+%2B+400%2F%28x+-+3%29%2C+%22=%22%2C+130%29   

Now solve for x.

That's all! Nothing COMPLEX!