Answer:
11
Step-by-step explanation:
Since ΔNOP is a traingle, all the angles added up together equal 180 degrees.
(5x-8) + (x-5) + (6x+1) = 180
Now simplify by adding like terms
12x-12 = 180
Solve for x by adding 12 to both sides and then dividing both sides by 12
12x=192
x=16
Once you solved for x, plug it into the angle you need to find.
m∠O=(x-5)
=(16-5)
=11
