B I think please give me brainliest
        
                    
             
        
        
        
Answer:
Add 22/63
Step-by-step explanation:
3/7 + n = 7/9
<u>Step 1:  Subtract 3/7 from both sides</u>
3/7 + n - 3/7 = 7/9 - 3/7
n = 49/63 - 27/63
n = 22/63
Answer:  Add 22/63
 
        
             
        
        
        
Answer:
4x^3+4x^2
Step-by-step explanation:
 f(x) = 4x^2 
 g(x) = x+1
(f•g)(x) = (4x^2) *(x+1) = 4x^3+4x^2
 
        
             
        
        
        
Answer:
33k - 15
Step-by-step explanation:
Given expression,

By the distributive property,


By combining like terms,

∵ Further simplification is not possible,
Hence, the required simplified form of the given expression is,
