Luke, Kira, and Ali each served 23 of their own cake. Each cake was the same size,
but Luke served 4 slices, Kira served 6 slices, and Ali served 8 slices. How is this possible?
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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?

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?

George writes the mixed number as sum and uses the distributive property 1/2.-2/5=1/2-2+2/5=1/2