Icould use some with theses questions

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%

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?