Plz help me its hard

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

What’s the domain of this function? fastttt

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.