SOLUTION: If M(-2,5) is the midpoint of AB and the coordinates of A are (4,7), what are the coordinates of B? 1) (1,6) 2) (-8,3) 3) (2,12) 4) (-8,6)

Algebra ->  Length-and-distance -> SOLUTION: If M(-2,5) is the midpoint of AB and the coordinates of A are (4,7), what are the coordinates of B? 1) (1,6) 2) (-8,3) 3) (2,12) 4) (-8,6)      Log On


   



Question 390019: If M(-2,5) is the midpoint of AB and the coordinates of A are (4,7), what are the coordinates of B?
1) (1,6)
2) (-8,3)
3) (2,12)
4) (-8,6)

Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
-2+=+%28x%2B4%29%2F2 ===> -4 = x+4 ===> x = -8.
5+=+%28y%2B7%29%2F2 ===> 10 = x+7 ===> y = 3.
The answer is (2), (-8, 3).