Answer:
When x=4
P(x) =4 - 4(4)^2 + 4(4) -5
=4 - 4(16) + 16 -5
=4 - 64 +11
= -60 + 11
= -49
x-16+x=180
2x-16=180
2x=196
x=98 degrees
x-16= 82 degrees
Hope this helps!
