Answer: 
Step-by-step explanation:

Answer:
no. because if you divide 4/15 you will get 0.266666.....
Answer:
2n + 5
Step-by-step explanation:
You are adding 5 to the multiplication of 2 and a number.
Answer:
See below:
Step-by-step explanation:
We can first setup an equation by doing the following:

Whole proccess above!
If you would like an explanation, please let me know so.
Its basically algebra and it's mainly on how you interpret it!
Have a nice day!
(6x^3 + 4x-2) + (4x^2 + 3x^3 - 6)=
6x^3 + 4x-2 + 4x^2 + 3x^3 - 6=
9x^3+4x^2+4x-8