Please help me I need help

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

Can you me find the missing length. i attached an image.

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2