Help me please with this ASAP

How to do this , and can some one explain

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

[15 points, algebra 2]simplify the complex fraction and find the restrictions.