Which system of equations has no solution? 5x+ 5y = 10 and 2x+2y = 4
3x-Gy=4 and - 4x+8y = 7
6x+2y = 6 and 7x+3y=9
3x-4y= 16 and 2x+3y=5

Need ! discuss how to convert the standard form of the equation of a circle to the general form. 50 points

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?

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.