Classify each system of equations as having a single solution, no solution, or infinite solutions.
y=5-2x
4x + 2y = 10
X = 26 - 3y
2x+6y= 22
5x + 4y = 6
10x - 2y = 7
x + 2y = 3
4x + 8y = 15
x + 5y = 24
3x + 4y = 17
-6x = 10y - 39
5x = 12 - y

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.