What is the sum of the polynomials? 17m-12n-1 + 4-13m-12

Can someone answer and tell me how to do this (will mark brainliest)

Swimming fleury swam 6 laps the first day,15 laps the second day,24 laps the third day, and so on. on which day will fleury swim 51 laps if the pattern continues?

Suppose you have a 40 percent chance of getting a job offer from your first choice firm, a 40 percent chance of getting a job offer from your second choice firm, and a 16 percent chance of getting a job offer from both firms. what is the probability that you will get a job offer from either firm?