What is the Midpoint of CD given the coordinates C(-4,8) and D(8,-4)?

Answer 1

average x and average y
x = (-4+8)/2 = 2
y = (8-4)/2 = 2
so
(2,2)

Answer 2

1- D. PG and plane PQS
2- 15* because 7x15+7= 112
3- 2,2
4- 36 units