Which of the following is another way to express -13-7 ?

Aportion of a line bounded by two points is defined as

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?

If i have 20$ and i gave 5$ away how much i got