The distance between the parallel planes ax + by + cz + d1 = 0 and ax + by + cz + d2 = 0 is d = |d1 − d2| a2 + b2 + c2 . find equations of the planes that are parallel to the plane x + 2y − 2z = −1 and two units away from it. (enter your answers as a comma-separated list of equations.)

Which functions are even? check all of the boxes that apply. f(x) = x4 – x? f(x) = x2 – 3x + 2 f(x) = (x - 2) f(x) = x done

Which number line represents the solution set for the inequality -1/2x> 24?

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.