IF M(3-1) is the midpoint of the segment AB and A(8.12) is the coordinates of A. Fin the coordinates of point B.

Answer 1

Note that A(8,12)+(-5,-13) = M(3,-1)
Since M is halfway to B, we need to add the same amounts to M that got us there from A:
M(3,-1)+(-5,-13) = B(-2,-14)