Acoon bank contains only quarters and dimes. there are 25 coins in all. seven of the coins are dimes. what fraction of the couns are quarters?

3. solve the given inequality and graph the solution on a number line.

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

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?