Riddle#1 what belongs to you but your friends use it more

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students

Ineed me i stuck and i don’t want to get it wrong

Which diagram shows lines that must be parallel lines cut by transversal?