Distance and Midpoint

Question

The midpoint of line segment AB is (-2,6). Find the coordinates for B, given the coordinates for A are (5,-10). 

Answer 1

B(-9, 22)

5--2 = 5+2 =7, -2-7 = -9= x coordinate of B

-10-6 = 16, 6+16 = 22= y coordinate of B

I might help to draw a rough graph, plot the points to see if the answer looks about right.

check the answer further, find the average value of the x coordinates of A and B to get the x coordinate of the midpoint. same with the y coordinates.