LetT ={x|x∈R, x2 >0}. What is intS? What is bdS?

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?

Find the area of the unshaded square

Using elimination, what is -4x+2y=-12 4x+8y=-24