SOLUTION: A line segment has an endpoint at (-6,8) and a midpoint at (-1,1). What are the coordinates of the other endpoint

Algebra ->  Length-and-distance -> SOLUTION: A line segment has an endpoint at (-6,8) and a midpoint at (-1,1). What are the coordinates of the other endpoint      Log On


   

Question 848484: A line segment has an endpoint at (-6,8) and a midpoint at (-1,1). What are the coordinates of the other endpoint
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Midpoint Pt(x,y):  ( %28x%5B1%5D+%2B+x%5B2%5D%29%2F2 , %28y%5B1%5D+%2B+y%5B2%5D%29%2F2++%29 )

%28-6+%2B+x%5B2%5D%29%2F2+=+-1 ⇒ x%5B2%5D+=+4

%288+%2B+y%5B2%5D%29%2F2=+1 ⇒ y%5B2%5D+=+-6

other endpoint is (4,-6)