What is y=4(a)+b
When a=7 and b=2
What is a and b

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

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.

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.