Evaluate the expression 4x^9y^-4/x^8y^-6 for x = 5 and y = 2.

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?

Awater tank holds 18000 gallons. how long will it take for the water level to reach 6000 gallons if the water is used at anaverage rate of 450 gallons per day