Can someone me with this geometry question 100% correct only

4+6x-3x^3 in standard form with explanations because i don’t understand

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?

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles