What is the midpoint of a segment whose endpoints are (-3-3) and (-13-13)?

Answer 1

It is [(3 + -13)/2, (3 + -13)/2] = [-10/2, -10/2] = (-5, -5)

Answer 2

The idea is to take the average of each set of coordinates, i.e., take the average of the x-coordinates, that will be the x-coordinates of the result; similar for the y-coordinates.