Add the following rational expression k^3/k+5 + (7k^3) / k+5 =

A.) 8k^3+3/k+5

B.) 23k^3+7/3k+10

C.) 6 (3k+1) / 3k+4

D.) 20k^3+1/k+8

[8k^3] / (k+5), perhaps the choice is A. with that + 3 being a typo.

Step-by-step explanation:

k^3 / (k+5) + (7k^3) / (k+5) = [k^3 + (7k^3) ] / (k+5)

k^3 / (k+5) + (7k^3) / (k+5) = [8k^3] / (k+5) ? not in the choices.

there is a typo ...

could it be: (k^3/k) + 5 + (7k^3) / (k+5) =

(k^3/k) + 5 + (7k^3) (k+5) = k^2 + 5 + (7k^3) / (k + 5)

= [k^2 * (k + 5) ] / (k + 5) + 5 * (k + 5) / (k + 5) + (7k^3) / (k + 5)

= [k^3 + 5k^2) ] / (k + 5) + 5k + 25) / (k + 5) + (7k^3) / (k + 5)

= (8k^3 + 5k^2 + 5k + 25) / (k + 5) but still not an answer choice ...

...

k^3 / (k + 5) + [ (7k^3) / k] + 5

k^3 / (k + 5) + (7k^2) + 5

k^3 / (k + 5) + (7k^2) * (k + 5) / (k+5) + 5 (k + 5) / (k + 5)

= k^3 / (k + 5) + ((7k^3) + 35k^2) / (k+5) + 5 (k + 5) / (k + 5) nope ...