The sum of two positive numbers is 37, and their difference is 7. If x and y represent the unknown numbers, which two equations belong to the system of equations that represents this situation?

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

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?

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?