Please help, I’m not sure about this question.

2/3(-6y+9x) expand each expression using the distributive property

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?

The sum of the two shortest sides of a triangle must be greater than length of the longest side .one side of triangle abc measures 8cm .the longest side of triangle abc measure 14 cm