Answer:
(-8.5,9)
Step-by-step explanation:
((-8+(-9))/2=-8.5
(7+11)/2=9
(-8.5, 9)
use midpoint formula
(-8 + -9) ÷2 , (7 + 11) ÷ 2
-17 ÷ 2 , 18 ÷ 2
-8.5 , 9
so the coordinates of the midpoint are (-8.5, 9)
