Solve the inequality

-7x + 12 = 75

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.

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).