The midpoint of AB is M(3,-2). If the coordinates of A are (8,4), what are the coordinates of B

Answer 1

8-3 = 5, 3-5 = -2 = the x coordinate of B

-2-4 =-6, -2-6 =-8 = the y coordinate of B

(-2,-8) is the point B

A is 5 to the right of the midpoint, so B is 5 to the left of the midpoint

A is 6 up from the midpoint so B is 6 down from the midpoint

Answer 2

Let B(x, y). Then (x + 8)/2 = 3; x = - 2 and (y + 4)/2 = - 2; y = - 8. So B(- 2, - 8)