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 = 
Answer:
I had done already.thanks for huge point and heart.
Answer:
16.225
just times 2.5 times 6.49
Answer:
15 or 20
Step-by-step explanation: