We can't conclude FA=FC.
Let's go with the obvious, AD=BD, BE=CE by the definition of bisector
I'm pretty sure the answer is D observational study.
Answer:
11
Step-by-step explanation:
Plug in
0 for j to get 1
1 for j to get -2
2 for j to get 4
3 for j to get -8
4 for j to get 16
Then add 1 - 2 + 4 - 8 + 16 = 11
D= 65 degrees.
Because straight line adds up to 180
So 180-115= 65