Find the area of the shape. Either enter an exact answer in terms of π or use 3.14 for π and enter your answer as a decimal

Cam bought some used books for $4.95. he paid $0.50 each for some books and $0.35 each for the others. he bought fewer than 8 books at each price. how many books did cam buy?

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x,y) ?

How can you tell when x and y are not directly proportional?