During the month of february, fabulous feet shoe mart sold 48 pairs of red loafers. after an ad campaign to boost sales, they sold 60 pairs on march. find the percent of increase in sales.

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.

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation. which method should jeremy use?