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+ Question 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 in progress 0 Math Quinn 1 week 2021-10-10T03:31:32+00:00 2021-10-10T03:31:32+00:00 1 Answer 0

## Answers ( )

Answer:[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…