SOLUTION: W,R and S are points on a number line,and W is the midpoint of RS.For each pair of coordinates given,find the coordinate of the third point.

Algebra ->  Angles -> SOLUTION: W,R and S are points on a number line,and W is the midpoint of RS.For each pair of coordinates given,find the coordinate of the third point.      Log On


   

Question 1048141: W,R and S are points on a number line,and W is the midpoint of RS.For each pair of coordinates given,find the coordinate of the third point.
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


The coordinates of the three points are related by the midpoint formulas:

and



where and are the coordinates of the end points, and are the coordinates of the midpoint.

Substitute for what you know, then solve for what you don't know.

John

My calculator said it, I believe it, that settles it