Answer:
A : 4x+5x=180
Step-by-step explanation:
They form a linear pair which equals 180.
-10a×4b+20a^2b-2ab
-40ab+20a^2b-2ab
-42ab+20a^2b Answer
I'm not sure...
X=-8
2 #7&"8*_8-*'7&-$(7