Find the least common denominator for the following rational expressions.
18/r- 4, -5r/r^-5r+4, r+7/r^-4r-5
o (1-1)(r – 4)(r-5)
o (r - 1)(r + 4)(r-5)
0 (-1)(r+ 1)(r-4)(r-5)
(r- 1)(r+ 1)(r + 4)(-5)

Of the 27 players trying out for the school basketball team, 8 are more than 6 feet tall and 7 have good aim. what is the probability that the coach would randomly pick a player over 6 feet tall or a player with a good aim? assume that no players over 6 feet tall have good aim. a. b. c. d.