What would the class size be if 30 people represent 40% of the class?

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 radical expression that is equivalent to the expression 27 1 over 5?

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1