Ineed it a laptop computer has a selling price of $800. this includes a 20% mark up. the computer is also being offered at a discount of 20%. a customer thinks that the seller is going to break even given this information. is the customer correct explain your reasoning? a. what was the price of the laptop before the markup? b. what is the discounted price of the laptop?

Find the value of the cosine for angle a

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?

What are linear equations? could'ya explain too me, ? ! and how do you see what graph is a proportional relationship?