Answer:
1st one
Step-by-step explanation:
Answer:

Step-by-step explanation:
The given polynomials can be added together by adding like terms together as shown below:
=> Add together, the coefficient of all terms that have the power of 3.




=> 


=> 


=> 


The answer = 
The variable in this algebraic expression is b
Answer:
Equivalent fractions
Step-by-step explanation:
X-2 y-1i think tell me if im wrong