Answer:
9.) -2/2 = -1
10.) -6/-11 or 6/11
11.) -3/-11 or 3/11
Explanation:
this is easy XD
So, first step the midpoint formula: (x1 + x2 / 2, y1 + y2 /2 )
9.) c(-9,-1) and D(7,3) ----> you should know the x and y and plug in :D
10.) E(5,-5) and F(1,-6) ----> you should know the x and y and plug in :D
11.) G(-5,3) and H(2,-8)----> you should know the x and y and plug in :D