Find the sum of the following A. P 8,11,14,17... upto 15 terms

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.

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.