M is the midpoint of segment AB. Find the coordinates of B given A(0,3)and M(-3,7).?

Question

(Find the coordinates of B)

One of the following:

B(-1.5,5)

B(3,-1)

B(-6,11)

B(1.5,2)

Answer 1

Ans: B (-6,11)

To find M, which is given, get the arithmetic mean (average) of the x coordinates, then the arithmetic mean of the y coordinates.  

Solve for x and y to get B(x,y)

     (0 + x)/2 = -3                            

     (3 + y)/2 = 7

Answer 2

I would say B(-1.5,5) seeing how -1.5 is halfway between 0 and -3 and 5 is halfway between 3 and 7.