Question 625382
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(x1,y1): (2,7)
(x2,y2): (-8,15)

Midpoint = ({{{(x1+x2)/2}}},{{{(y1+y2)/2}}})
Midpoint = ({{{(2+-8)/2}}},{{{(7+15)/2}}}) = ({{{-6/2}}},{{{22/2}}}) = <b>(-3,11)</b>
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