There are 30 students in the class. Eleven have blue eyes. Fifteen have brown hair. Three students have both blue
eyes and brown hair. How many students have neither blue
eyes nor brown hair?

PLZ HELP ME OU

Solve the problem by making up an equation. a child is 12 years old, and his father is 32 years older. in how many years will the age of the father be 3 times the age of the child?

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.

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