Answer: 
Step by step:

(Used a table of common angles)
The second one is correct so its 2
Answer:
No, -1/3 is not a solution
Step-by-step explanation:
See if it is a solution by plugging in -1/3 as v and seeing if the equation is correct:
9v - 2 = 3v
9(-1/3) - 2 = 3(-1/3)
-3 - 2 = -1
-5 = -1
-5
-1
So, since the equation is incorrect, -1/3 is not a solution.
Y= 1/10x + 2/10 is what you are left with once the equation is simplified