Can somebody help me with the problem in the picture :( pleasee

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

Two consecutive negative integers have a product of 30. what are the integers?

What is the benefit of converting measures in a ratio to the same unit