Ms. peltier has 42 inches of purple ribbon 36 inches of greenwood and 18 inches of friendship in chains to cut the ribbon into even pieces for an art project and doesn’t want to have any leftover what is the greatest length of ribbon she could use

The parabola opens: y=√x-4 (principal square root) up down right left

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?

(25 ! ) what does it mean for an equation to have no solution or infinitely many solutions?