ABCD is a rhombus. The coordinates of A are (5, 11)
The equation of the diagonal DB is y=1/3x+5

The equation of the diagonal AC can be written in the form y = mx + c, where m and c are integers.

Work out the value of m and the value of c.

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?