An online grocery company buys a pound of grapes for 80 cents and sells it for a dollar. What percent of the selling price of grapes is the company's profit?

1. what is the measure of ∠abc? what is the measure of ∠abd?

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?