Children under 10 years and older people over 65 years receive a discount on movie tickets. let x represent the age of a person who receives a discount. which inequality represents the age of a child who receives a discount? which inequality represents the age of an older person who receives a discount? which compound inequality represents the age of a person who receives a discount?

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}

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.

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.