300 cannot be converted to a rational number. It has to stay and irrational number because it is not a perfect square
        
                    
             
        
        
        
Answer:
x axis
Step-by-step explanation:
We know the x value stays the same. If you were to graph the line y=3 and y=-3, you would see that it is a reflection over the x axis.
 
        
             
        
        
        
Answer:
r=12
Step-by-step explanation:
Look, we can reverse the problem to get 23-11=r. This means that r=12.
 
        
                    
             
        
        
        
Answer:
The "check your answer" probably means check your answer by graphing. 
Step-by-step explanation: