15 points which of the following is not a measure of variability? a. range b. variance c. standard deviation d. regulated differences

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left