Select all the expressions that have a value of 40 when x = 10.8. 4,320 ÷ x

288x + 16

(x2 ÷ 18) + 33.52

(1,752 ÷ x) – 16229

x12 + 36

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48

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?

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /