Answer:
Answer for 9: C. 36
Answer for 10: G. 6
Answer for 12: F
Step-by-step explanation:
 
        
             
        
        
        
Answer:
what you know bout love i got what you need. ️...........
 
        
                    
             
        
        
        
We know, the measure of whole circle = 360
So, ACB = 360 - AOB
ACB = 360 - 30
ACB = 330
In short, Your Final Answer would be Option A
Hope this helps!
        
                    
             
        
        
        
PEMDAS (order of operations rules) require that we perform operations in a certain order: anything inside parentheses first, followed by any exponentiation, followed by mult. and div., finally followed by addition and subtraction.
Thus, we must evaluate 5+8÷4-1 first, as it's inside parentheses. Focusing on the division first, we get 5+8÷4-1 = 5 + 2 - 1, or 6.
Then we have 5 - [6], which comes out to -1.