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:
a) find the value of y when x is equal to 4.
Step-by-step explanation:
All's =a
Bob's =b
Lunar =l
A:B = 4:5 B:C = 6:7
Multiply the two ratios above by 6 and 5 respectively
A:B = 24:30 and B:L=30:35
Now that we have the B's to be the same
Alls:Lunar = 24:35
4*m*3/3*m*2*n*x*9*n*2/30*m*2*n*2 evaluates to 96/5n^3m^3mx and that is the final answer.