2. determine which ordered pair in the form (a, b) is a solution of the given equation.
7a – 5b = 28
(–3, –2)
(–2, –3)
(0, 4)
(4, 0)
3. determine whether the ordered pairs in the form (x, y) are solutions of the given equation and select the correct answer.
yes, both are solutions.
no, neither is a solution.
the first is a solution, but the second is not.
the first is not a solution, but the second is.

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126 a. the attendance was never the same at both plays. b. the attendance was the same on day 5. the attendance was 231 at both plays on that day. c. the attendance was the same on day 13. the attendance was 295 at both plays on that day. d. the attendance was the same on days 5 and 13. the attendance at both plays on those days was 231 and 295 respectively.

Suppose you just purchased a digital music player and have put 8 tracks on it. after listening to them you decide that you like 4 of the songs. with the random feature on your player, each of the 8 songs is played once in random order. find the probability that among the first two songs played (a) you like both of them. would this be unusual? (b) you like neither of them. (c) you like exactly one of them. (d) redo () if a song can be replayed before all 8 songs are played.

If np3 /nc2 = 6, find the value of n