Wally counted 50 pennies from his piggy bank. He kept 80% of them. How many pennies did Wally keep?

Which equation represents a line that is parallel to the line whose equation is 3x-2y=7( show all work)

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.

Combine the information in the problem and the chart using the average balance method to solve the problem.