Which is a word phrase for the variable expression? 3(n – 1) a. three times the quotient of a number n and 1 b. three more than the difference of a number n and 1 c. one less than the product 3 and a number n d. three times the difference of a number n and 1

Which expression is equivalent to 2x^2+2x-4/2x^2-4x+2

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.

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%