The answer is actually 42. Not 20.
You replace each x with 3
5(3)+9(3)
That 3 right next to the five means you multiply not add.
15+27=42
Brainliest my answer if it helps you out?
Answer:

- Please see the attached picture for full solution!:)
----------------- HappY LearninG <3 --------------
Step-by-step explanation:
1. Use exterior angles (each adds up to 360) to find interior angles
2. Add this together
3.Take it away from 360
Answer: 72/35
Step-by-step explanation:
10/-8 = -8/10 = -.8
-0.8*(2/7)*-9= about 2.06.(72/35)
-3(2^2) - 3(-1) + 3(3^2) - 2(-1^3)
-3(4) - 3(-1) + 3(9) - 2(-1)
-12 + 3 + 27 + 2
-9 + 27 + 2
18 + 2
20