The base of a parallelogram is 9 1/2 cm and its height is 11 1/2cm. what is the area of the parallelogram.

Two numbers have a sum of -19. one number is x. what expression represents the other number?

Which best explains why this triangle is or is not a right triangle ?

At store a, erasers are sold individually. the cost y of x erasers is represented by the equation y=0.75x. the costs of erasers at store b are shown in the graph.