4/9 of 10 pls i don't understand i'm getting stressed : (

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?

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Simplify this expression. 8x 16(x + y)