Find the measure of X in parallelogram wxyz

Aregular hexagon rotates counterclockwise about its center. it turns through angles greater than 0° and less than or equal to 360°. at how many different angles will the hexagon map onto itself?

Write as a product: ac^2–ad+c^3–cd–bc^2+bd

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.