What does reflection across x axis mean

16 more than the product of 5 and p

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?

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?