Bob, Kris, Janelle, and Pat are in a study team. Bob, Kris, and Janelle have algebra tiles on their desks. Bob has two x2 -tiles, four x-tiles, and seven unit tiles; Kris has one x2 -tile and five unit tiles; and Janelle has ten x-tiles and three unit tiles. Pat’s desk is empty. The team decides to put all of the tiles from the three desks onto Pat’s desk. Write an algebraic expression for the new collection of tiles on Pat’s desk.
Count the x2-tiles, the x-tiles, and the unit tiles separately from one another.
3x2 + 14x + 15