Answer:
:)
Step-by-step explanation:
For simplicity I will substitue
for β.

In the first step I used the identity
And I factored out 
Then it's just simple algebra to cancel till the 3rd step where we used another identity derived from the Pythagorean Theorem.

That's it!
I think it’s A I’m not sure
Answer:
9
Step-by-step explanation:
You substitute 9 for x and 9 - 3 = 6
I hope it helps! Have a great day!
Muffin ^^
Answer:
C) v≤-5
Step-by-step explanation:

Divide each side by 4,

Answer:
-48
Step-by-step explanation:
12 x 2=24
12 x 6= 72
24 - 72 = -48