ANSWER ASAP PLZ determine which of the following formula(s) are needed to prove that a quadrilateral is an isosceles trapezoid. select all that apply.
- midpoint formula
- slope formula
- distance formula
- the area formula
- the perimeter formula

Find all the values of x that make 0.1x + 0.25(102 - x) < 17.10 true.

Which of the following is true for the relation f(x)=2x^2+1

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.