(5x2) / 6x0
10 / 0
The answer is 0
        
                    
             
        
        
        
Answer:
the set of all real numbers
Step-by-step explanation:
f(x) = 3X + 9 is a polynomial, and so both the domain and the range are "the set of all real numbers."  
None of your answer choices match this.  Check with your teacher if you can.
 
        
             
        
        
        
I guess sides and angles !