Answer:
rational 
Step-by-step explanation:
-4+0.8=-3.2 
 
        
             
        
        
        
The answer is D. 
You have to make the whole numbers equal to then solve for the exponents:
F(x) means y, therefore, y is 9.
9 = 3^x.
3^2 is the same as 9.
Then, 3^2 = 3^x.
Then solve for the exponents,
2 = x
Therefore your answer is 2.
        
             
        
        
        
Answer:
w=4
Step-by-step explanation:
adding a negative is like subtracting so w=11-7
 
        
                    
             
        
        
        
Answer:
3rd one
Step-by-step explanation: