Question 777623
If (1/2, −1) is the midpoint of segment QP and the 
coordinates of P are (− 1/2, 1), find the coordinates of Q.
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Let Q be (x,y)
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(x+(-1/2))/2 =(1/2)
(2x-1)/4 = 1/2
2x-1 = 2
2x = 3
x = 3/2
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(y+1)/2 = -1
y+1 = -2
y = -3
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Q is (3/2,-3)
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Cheers,
Stan H.