what is the equation in slope intercept form of the line that passes through the point (-4,-8) and is perpendicular to the line represented by y=1/2x+9 ?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

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%

Which of the following parabolas opens down?