When I started my rock collection I had 8 rocks. Over the summer I collected 48 additional rocks. At the end of the summer I gave away some of my favorite rocks to friends, but I still have 49 rocks left. Which equation could I use to find out how many rocks I gave away to friends?

Which inequality comparing two of the expressions is true when 0.7 < x < 0.9

The length of triangle base is 26. a line, which is parallel to the base divides the triangle into two equal area parts. find the length of the segment between triangle legs.

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.