How do i solve this?

Step-by-step explanation:

Let's simplify step-by-step.

7n^4+4+4n^2+3n^2+3−2n^4

=7n^4+4+4n^2+3n^2+3+−2n^4

Combine Like Terms:

=7n^4+4+4n^2+3n^2+3+−2n^4

=(7n^4+−2n^4)+(4n^2+3n^2)+(4+3)

=5n^4+7n^2+7

=5n^4+7n^2+7

Hope this helps :)

the answer is 844

step-by-step explanation:

it is 844 because if you add 836.50 + 7.5 you will get 844

step-by-step explanation:

descending order means to order the polynomials from the term with the largest exponent to the term with the smallest exponent.  

therefore, the correct answer is d.