Algebra ii question!

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?

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?

Aline passes through the point (–7, 5) and has a slope of 1/2 which is another point that the line passes through?