Please help Identify each function for which f(4) = 7.

A f(x) = - 1/2x + 7/2
B f(x) = 2x - 1
C f(x) = 2x² – 3x – 13
D f(x) = 1/2x + 3/2

Which equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?

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?