Simplify the following exprés by either combining like terms or distributing 1.) 4x + 3x
2.) 3(2x - 4) + 2x
3.) 12x -10x +5

Hi my sisters and brothers can tell me the answer because i don’t understand the question

For what values of x is x2 + 2x = 24 true?

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.