I would assume this to be equal to y⁴ ₓ y⁵
= y⁴ ⁺ ⁵,   By law of indices. 
= y⁹
I hope this helped.
        
             
        
        
        
It is both 1 and 2. Both repeat the same amount of times
        
                    
             
        
        
        
Answer:
oof i dont know this
Step-by-step explanation:
 
        
             
        
        
        
Its super easy all u have to do is go on tiger math and the first link will take you to it and u put in the question and it will give you a step by step how to do it and it will give you the answer 
 
        
             
        
        
        
Try making a proportion 10,000/1 and then 1000/x and solve