Answer:
1 . 16
2 . 4
3 . 64
4 . -4
The fourth one goes first and then the second one and then the first one and then the third one.
1.180-(57+36)=87 degree
2.180-39=141
141/2=70.5 degrees each
It seems okay to me (if that what your asking) I don't know this subject very well ut the part your working on " I'm familiar with ?" Don't be surprised if I was wrong buuuuut it does look okay to me "(the answer)".
Answer:
99/100
Step-by-step explanation:
First of all recall that

Now we we will try to apply that formula for
and
.
First rewrite 
Now
