when the function of f(x) varies directly with X and f(x) equals to 51X equals 50 what is f(x) when X equals five

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.

What expression is equivalent to (2x-1)(x-3)?

Answer! if you don’t mind, can you explain