Twice a number k plus the quantity s minus 2

Which best explains why this triangle is or is not a right triangle?

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.

Nine more than four times a number is the same as one less than twice the number. find the number?