Is xy^2+3x-4y^-1 a polynomial or not a polynomial?

Subscriptions to a popular fashion magazine have gone down by a consistent percentage each year and can be modeled by the function y = 42,000(0.96)t. what does the value 42,000 represent in the function?

The triangles in the diagram are congruent. if mzf = 40°, mza = 80°, and mzg = 60°, what is mzb?

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities