(15, -8) :)
From C to midpoint you do (+10, -7), so you have to do that again to get to D
1

is the answer you're looking for.
Answer:
-8x3 - 4x2 + 8x - 4
Step-by-step explanation:
5x6=30
6x6=36
You would need 1 more 6
I can't explain this very well, sorry.