{
x + 3y - 9
5x - 2y = 7

Arestaurant gives out a scratch-off card to every customer. the probability that a customer will win a prize from a scratch-off card is 25%. design and conduct a simulation using random numbers to find the experimental probability that a customer will need more than 3 cards in order to win a prize. justify the model for your simulation, and conduct at least 10 trials.

Find the domain of the following expression: 1/(√x)-2

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28