Posted by **Megan** on Wednesday, August 23, 2006 at 8:35pm.

(4,-2) and (2,-8) lie on the line Ax-2By = 28. What is the value of A?

SOMEONE PLEASE HELP ME!!

THANK YOU SOOOO MUCH!

4,-2) and (2,-8) lie on the line Ax-2By = 28. What is the value of A?

Put the points in. First one.

A4-2B(-2)=28

4A+4B=28

A+B=7 call this equation 1)

second point:

A2-2B(-8)=28

2A+16B=28

A+8B=14 call this equation 2)

Now you have two equations...

A+B=7

A+8B=14

Now solve for A and B by any number of methods.