Well, it really depends but it could be 9 rolls of quarters, 5 rolls of quarters and 8 rolls of dimes, 4 rolls of quarters and 10 rolls of dimes, 3 rolls of quarters and 12 rolls of dimes, etc.
        
                    
             
        
        
        
Its A if they are talking about a prime factorization tree.<span />
        
                    
             
        
        
        
After 6x+48=72, you have to subtract 48 on both sides not add. Your final answer will be x=4. 72-48=24.. 24/6= 4.
        
             
        
        
        
F(3) occurs when x =3. So lets plug 3 into our equation.
 
F(3) = -28
I hope this helps! :)