If f(x)=2x+1 and g(x)=(x^2)-7, find (f/g)(x).

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?

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

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.