SOLUTION: On a coordinate grid, RS has endpoint S at (10,10) The midpoint of RS is(9,8) What is the x coordinate of point R?

Algebra ->  Length-and-distance -> SOLUTION: On a coordinate grid, RS has endpoint S at (10,10) The midpoint of RS is(9,8) What is the x coordinate of point R?      Log On


   



Question 831469: On a coordinate grid, RS has endpoint S at (10,10) The midpoint of RS is(9,8) What is the x coordinate of point R?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The midpoint is the average of x and y values.
X%5Bm%5D=%28X%5BR%5D%2BX%5BS%5D%29%2F2
9=%28X%5BR%5D%2B10%29%2F2
X%5BR%5D%2B10=18
X%5BR%5D=8