Which of the following is not a vertex of the figure formed by: y> 5/4x-7/2 and y> -3/2x+2 and y< 1/3x+2

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

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.

What is the approximate value of  x  in the equation below.–3.396–0.7080.3040.955