The number of home theaters a company sells varies directly as the number spent on advertising. How many home theaters does the company sell for $500 spent on advertising?

Y=4x^2+x-1 solve using quadratic formula

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.

Describe the end behavior of the function below. f(x)=(2/3)^x-2 a. as x increases, f(x) approaches infinity. b. as x decreases, f(x) approaches 2. c. as x increases, f(x) approaches -2. d. as x decreases, f(x) approaches negative infinity.