What is the mode of the following numbers?
9, 10, 6, 5, 6

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?

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k