Question 187742
One end of a line segment is (1,-2). If the midpoint of the segment is (4,3), find the coordinate of the other endpoint of the segment. 
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The coordinates of the mid-point are the average of the coordinates
of the endpoints.
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Let the other endpoint be (x,y)
Equations:
(x+1)/2 = 4 
x+1 = 8
x = 7
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(y+-2)/2 = 3
y-2 = 6
y = 8
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The other endpoint is (7,8)
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Cheers,
Stan H.