Make a the subject of a^2+b^2=c^2

Ill mark the brainliest if you me with the these three questions 7,8,9

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

What term makes it inconsistent y=2x - 4