Please help me! My teachers haven't taught me this yet and I'm freaking out!

Simplify the polynomial.

-3f^2+4f-3+8f^2+7f+1

A. 5f^2-11f+2
B. 11f^2+11f+2
C. 5f^2+11f-2
D. -5f^2+11f-2

Fast phone couldn’t copy and paste so i decided to right it down

(least common multiples) the answer that i had in the 1st step was lcm of airline tickets sold=72. idk if that even matters but just in case. ! three co-workers are busy selling airline tickets over the phone. in an 8-hour day, charles can sell 8 airline tickets, ann can sell 9 airline tickets, and michelle can sell 6 airline tickets. step 2 of 2: what is the smallest number of 8-hour days needed for each of them to achieve the same number of sales? it takes charles . it takes . it takes .

Which graph represents the linear function below? y-3=1/2(x+2)