Point M is the midpoint of AB. M has coordinates of (6.-4) and A has coordinates of (3.-7).Part A: What are the coordinates of point B?

We will solve as follows:
[tex](\frac{x+3}{2}=6,\frac{y-4}{2}=-4)=(x=9,y=-1)[/tex]So, the coordinates are (9, -1).