–50 – 9y = 3
5x – 9y = -2

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

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%

How do the definitions, properties, and postulates you've learned about line segments, parallel lines, and angles to define the shapes of polygons