Question 709625
 Consider (−7.5, −4.5) and (2.4, 8.3) 
find the x coordinate of the midpoint of the
line segment joining the points. 
x = (-7.5+2.4)/2 = -2.55
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Find the y coordinate of the midpoint.
y = (-4.5+8.3)/2 = 1.9
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Cheers,
Stan H.