What is the product of ? 212 and ? 313 ? ? 813 ? ? ? 616 ? ? 616 ? ? 813 ?

Cot(90° − x) = 1 the value of x that satisfies this equation is °. a. 60 b. 135 c. 225 d. 315

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

Match the one-to-one functions with the graphs of their inverse functions.