The values of a, b, and c for the equation 8x^2-2x=1

The volume of a cube is 8 in to the 3rd power. how long is each side?

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?

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?