Answer
M = ( 4,0)
Work Step by Step
The coordinates (x, y) of the midpoint M are
$x = \frac{x_1+x_2}{2} = \frac{3+5}{2} = 4$
$y = \frac{y_1+y_2}{2} = \frac{-4+4}{2} = 0$
That is, M = ( 4,0)
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