Question 43221
Midpoint:: ({{{(x1+x2)/2}}},{{{ (y1+y2)/2}}})
given (x1,y1)=(-2,9) and  (x2,y2)=(4,5)
Midpoint: ({{{ (-2+4)/2}}},{{{ (9+5)/2}}})

          ({{{ 2/2}}} ,{{{ 14/2 }}})= (1,7)
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