I need help with all of these answers

4n
4(-5)
-20
————————-
n / 2n
4 / 2(4)
4 / 8
1 / 2 or 0.5
————————-
n^2 + 2n - 8
(-3)^2 + 2(-3) - 8
9 + (-6) - 8
3 - 8
-5

In the first triangle 80+20+p=180 (since sum of all angles of a triangle is 180)so p= 80also in second triangle 55+45+q=180 (since sum of all angles of a triangle is 180)so q=80so we can conclude that p=80 degrees q=80 degrees so p=q=80 degreeshence option b is correct