Answer:
I think its y^-3
Step-by-step explanation:
Since y^-3/y^-2 are both negatives they would swap places to become positive - y^2/y^3
then using rules of exponents you would subtract the exponents witch would be y^-3
 
        
                    
             
        
        
        
Answer:
   1/3
Step-by-step explanation:
We are given ...
   barrettes : hair ties = 5 : 7
   barrettes : hair bands = 5 : 8
Then the combined ratios are ...
   barrettes : hair ties : hair bands = 5 : 7 : 8
For every 5 barrettes, there are 7+8 = 15 hair ties and bands, so their ratio is ...
   barrettes/(hair ties and bands) = 5/15 = 1/3
 
        
                    
             
        
        
        
Okay so whats the question?
        
             
        
        
        
That’s right they both equal 67