I need help with a test

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

the answer to this would be 5x^3-6x^2-24 over 3x^2

hope this if needed hmu

7 9/10 as an improper fractions is 79/10.

hope it : )