The third-grade class sells lemonade to raise funds. After selling 58 liters of lemonade in 1 week, they still
have 46 liters of lemonade left. How many liters of lemonade did they have at the beginning?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Could somebody me with this radical simplification?

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.