F(x)=-4(-1)-5 
f(x)=4-5
f(x)= -1
-1 is your answer 
        
             
        
        
        
Step-by-step explanation:
answer is in picture see 
hope it helpful
 
        
             
        
        
        
Answer:
third one should be about f
 
        
                    
             
        
        
        
Answer:
B & C
Step-by-step explanation:
2:9 can also be written as 2/9
A. 9:2 is just the reciprocal of 2:9 so it is not equivalent to it
B. 18:81 is 2×9:9×9 meaning that is equivalent to 2:9
C: 12:54 is 2×6: 9×6 so it is equivalent to 2:9
Since the two correct answers have already been found, I don't need to explain more.
Hope this helped!!!