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January 30, 2015

January 30, 2015

Posted by **Al** on Monday, April 30, 2012 at 7:16am.

a) Find the distance of the race.

b) What was Remy's speed?

- math -
**Henry**, Wednesday, May 2, 2012 at 8:51amREMY

Speed = X m/min.

d = X * 45 m.

JON

Speed = (X-50) m/min.

2d/3 = (x-50)*45.

Multiply both sides by 3/2:

d = 67.5(X-50).

Substitute 45x for d:

45x = 67.5x - 3375.

45x - 67.5x = -3375.

-22.5x = - 3375.

b. X = -3375 / -22.5 = 150 m/min = 150m/60s = 2.5 m/s = Remy's speed.

a. d = 45x = 45min * 150m/min = 6750 m.

- math -
**Anonymous**, Wednesday, May 2, 2012 at 10:15amThank you.

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