Mary bought some candy. She bought 1 package containing 7 pieces of candy and "z" packages containing 2 pieces each. Write an expression to represent the number of pieces of candy Mary has. Use "z" as your variable.

(50 points) drag each description to the correct location on the table. each description can be used more than once. some systems of equations and their graphs are given in the table. for each system, place the description(s) in the box that correctly describe the type of system shown. :