Answer:
9n-3
Step-by-step explanation:
since 9n has a variable, u can't add or subtract 9n with 3
but if you were multiplying: 9n(3) then it would be 27n 
:)
 
        
             
        
        
        
Answer:
6.5 hours
Step-by-step explanation:
hope this helped u bye 
 
        
             
        
        
        
Answer:
2 (4x - 1) + 6 = 8x + 4 = 4(2x+1)
Step-by-step explanation:
2 (4x - 1) + 6
= (2*4x + 2*-1) + 6
= 8x - 2 + 6
= 8x + 4
= 4/(2x+1)
 
        
                    
             
        
        
        
Subtract it and you will find your answer hope this helps
        
             
        
        
        
Answer:
A
Step-by-step explanation: