The greatest common factor (GCF) is the product of the greatest common factors of the numerical coefficients and the variables involving x and y. 
                            
                           -12(x^4)y - 9x³y² + 3x²y³
     
                            -3x²y(4x² + 3xy - y²)
<span>Thus, the answer is letter A. </span>
        
             
        
        
        
We know, 3 feet = 1 yard.
We have to convert feet to yards to calculate the ratio so that the final answer doesn't have any unit.
Therefore, 21 feet =  = 7 yards
 = 7 yards
Thus, the ratio 

The fraction  is already in its simplest form.
 is already in its simplest form.
Therefore, the given ratio as a fraction in the simplest form without any units is 
 
        
             
        
        
        
Answer:
Step-by-step ex snsmsndjsnshsushdidjdplanation:
 
        
             
        
        
        
Answer:
your answer is B
Step-by-step explanation:
 
        
                    
             
        
        
        
4x-3 is the answer. Hope this helps:)