1/4d=1/5g(g+e)-h solve for d

What is the difference between regular convex and concave polygons

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?

In the geometric progression –3, 12, −48… what term is 3,072?