A class had 6 students absent one Monday. This was 2/7 of the entire class. How many students were present that day?

The solution set for 5v2 – 125 = 0 is

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

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?