I need serious help please do not ignore and when your replying don’t leave

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 is the value of x when x + 7 = 21?

The square root of 9x plus 7 plus the square rot of 2x equall to 7