Find the probability of drawing a king from a standard deck of cards and then drawing a queen after the first card is replaced in the deck.

A20? -foot ladder is placed against a vertical wall of a? building, with the bottom of the ladder standing on level ground 19 feet from the base of the building. how high up the wall does the ladder? reach?

Simply 8x squared + 5(7x squared- x) - 2x =

Triangle xyz has vertices x(1,3), y(0,0)