Tierney H.
asked • 05/10/16
The midpoint of segment AB is M(-3, 3). The coordinates of point A are (1, 8). Find the coordinates of point B.
Andrew M.
answered • 05/10/16
Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors
Midpoint of two points: M = ((x1+x2)/2, (y1+y2)/2)
(x1, y1) = (1,8)
M = (-3, 3)
(1+x2)/2 = -3
1 + x2 = -6
x2 = -7
(8+y2)/2 = 3
8+y2=6
y2 = -2
point 2 is (-7, -2)
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