Factor the trinomial: 6x2 + 7x - 20
a. (3x + 6)(x + 1)
b. (3x + 2)(2x - 10)
c. (2x - 5)(3x + 4)
d. (3x - 4)(2x + 5)

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.