Yvaries directly as x and inversely as the square of z. y equals 10 when x equals 36 and z equals 6. find y when x equals 2 and z equals 4.
y =
nothing

Average acceleration: i have no idea how to do this.

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

Describe the symmetry of the figure. identify lines of symmetry, if any. find the angle and the order of any rotational symmetry.