#20 you are constructing a triangle. you draw the first angle, as shown. your friend says that you must be constructing an acute triangle. is your friend correct? explain your reasoning.

What is the size of the matrix resulting from

How to do this , and can some one explain

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%