Determine if the graph is symmetric about the x-axis, the y-axis, or the origin.
r = 5 cos 3θ

PLEASE HELP, DO NOT NEED GRAPH, showing work, on determining the graph

Which statement is not always true for a parallelogram? (a) opposite sides are congruent. (b) diagonals bisect each other. (c) it has 4 congruent angles. (d) consecutive angles are supplementary.

Suppose the equation ||x-a|-b|=2008 has 3 distinct real roots and a not =0. find the value of b.

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?