Thursday

December 18, 2014

December 18, 2014

Posted by **Caroleen** on Tuesday, January 6, 2009 at 5:06pm.

Here's the problem:

#1: Jon begins jogging at a steady 3 meters/sec down the middle of Lane #1 of a public track. Laura starts even with him in the center of Lane #2 but moves at 4 meters/sec. At the instant they begin, Ellis is located 100 meters down the track in Lane #4, and is heading towards them in his lane at 6 meters/sec. After how many seconds will the runners lie in a straight line?

a. Let t be the number of seconds the three have been running. Write expressions for the number of meters each has run after t seconds.

b. Consider the location of each runner as a point on a graph. What quantity might you use as the x-coordinate? What quantity might you use as the y-coordinate?

c. How can you tell if three points are on a line? Use this to solve the problem.

Thanks so much in advance. Any help is appreciated, even if you can only solve one part. Thanks!

**Answer this Question**

**Related Questions**

Algebra 1 - I'm having trouble solving x=2(x-1)+6 I understand but I get ...

Algebra--help really needed! - I'm having some trouble with my algebra homework...

Please help--algebra! - Here's the question I'm having trouble with. Please walk...

More algebra--please help! - Here are some more questions I'm having trouble ...

Algebra--please help! - I really need help with my math homework today, because ...

government - I just need some ideas please. I have to trace a policy example ...

Algebra - I have to work out this equation for my college paper and I am having ...

Algebra--please help! - Here are some more questions I'm having trouble with. ...

Math Algebra - Find the Values of X 12p^2+11p-22=0 I'm having some trouble with ...

Algebra, PLEASE help! - Factor. 0.25x^2 + 0.3x + 0.09 I am having some trouble ...