List the common factor of the numbers 20 and 50

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.

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

X-intercept=-5 y-intercept=2 the equation of the line is