What is the answer to this question?

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

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?