B=540−30m gives the balance bb (in dollars) that you owe on a drum set after mm monthly payments. what is the balance after 9 monthly payments?

Student price tickets to a movie are $1 and non student tickets are $2. 350 tickets are sold and the total amount made is $450. how many non student tickets were sold ? a) 100 b) 150 c) 200 d)250

Having a hard time understanding this question (see attachment).

Which of the following graphs could represent a cubic function?