Y varies directly to some quantities and varies inversely to some other
quantities

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0