Question 159108
m(x,y) is the midpoint of CD with endpoints c(5,9) and d(17,29).Find the values of x and y?
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The best way to do these is to deal with x and y separately.  Get the average of x, then the average of y.

(5+17)/2 = 11  (x)
(9+29)/2 = 19  (y)
So it's m(11,19)