A hiker starts at an elevation of 420 yards below sea level descends 1,400 yards and before ascending for 4,600 yards. What is the elevation at the end of the hike?

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.

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.