5+4 * 2+6-2 * 2-1
insert parentheses in this expression to change order of of operations so the expression can equal the value of 19
i need this fast and will give 5 stars also show work you : )

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?

Which linear inequality is represented by the graph?

Solve the system of equations using the linear combination method. {4x−3y=127x−3y=3 enter your answers in the boxes.