Randy and sandy have a total of 20 books between them. after sandy loses three by leaving them on the bus, and some birthday gifts double randy's collection, their total increases to 30 books. how many books did each have before these changes?

explanation : )

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

The owners of four companies competing for a contract are shown in the table below. if a report is released that advocates company b, which of the people having funded the report should result in the most skepticism? company owner of company company a jake adams company b company c company d debby smith henry rose rhonda baker o a. jake adams o b. rhonda baker o c. debby smith o d. henry rose

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.