Sarah bought 7 more songs than betsy. if sarah bought 21 songs from apple music, how many songs did betsy buy?

Find the sum to the equation 3+6+9+

17 in long 1.3 ft wide and 8in high what is the volume

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?