What three prime numbers add up to 30 except 2

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

(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 .

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps