What is the greatest common factor of 24,60

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.

Simplify the expression 10/11(22z) + (a+5) -1

What is the result of adding the system of equations? 2x+y=4 3x-y=6