Which lines are perpendicular to the line y – 1 = (x+2)? check all that apply. y + 2 = –3(x – 4) y − 5 = 3(x + 11) y = -3x – y = x – 2 3x + y = 7

Given: ac and db are diameters. m∠3=

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).