Homework Help: Pre-Algebra

Posted by Ola on Wednesday, August 18, 2010 at 6:28pm.

Courtnytravels south on her bicycle riding 8 miles per hour. One hour later, her friend Horacio starts riding his bicycle from the same location. If he travels south at 10 miles per hour, how long will it take him to catch Courtney?

Pre-Algebra - PsyDAG, Thursday, August 19, 2010 at 12:09pm
Let x = hours

8x = 10(x-1)

Solve for x.
Pre-Algebra - PsyDAG, Thursday, August 19, 2010 at 12:12pm
Sorry, you are PRE-algebra, so you may not know how to solve for x.

8x = 10x - 10

Subtract 10x from both sides.

-2x = -10

Divide both sides by -2.

x = 5
Pre-Algebra - Joe Mama, Monday, August 30, 2010 at 10:05pm
Evidently you haven't mastered pre-Algebra since your answer is WRONG. It takes him 4 hours to catch her. While she does ride for 5 hours, it only takes him 4 to catch her.

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