Rafael can run 5 laps around the track in 16 minutes. If he runs at the same rate, which of the following proportions can be used to find the number of minutes, m, it takes him to run 20 laps?

Write two subtraction equations that are equivalent to 5 + 12 = 17.

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?

Standard deviation of 19,29,21,22,23