Solve the open sentence -3 ≤ n + 6 ≤ 7 a) n ≤ - 9 and n ≤ 6 b) n ≥ - 9 and n ≤ 1 c) n ≤ 3 and n ≤ 7 d) n ≥ 9 and n ≤ 7

Graph the system: f(x)= 3/x-2; f(x)= 1/2x + 2

Me because some of question i don’t understand

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.