Asmall publishing company is planning to publish a new book. the production costs will include one-time fixed costs (such as editing) and variable costs (such as printing). there are two production methods it could use. with one method, the one-time fixed costs will total , and the variable costs will be per book. with the other method, the one-time fixed costs will total , and the variable costs will be per book. for how many books produced will the costs from the two methods be the same?

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.

Wrote and expression for the difference of p and 4

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great