Do both or one 3. An electrician is buying interior light fixtures.
The wholesale price for a 13-watt low-energy
lamp is $4. The price for a high-energy lamp
is $5. Write an expression for how much the

electrician spends for a units of the low-
energy lamp and b units of the high-energy

lamp.

5. A games store was gearing up for the recent
console release. They have put six Xboxes
and nine Playstations on the shelf. In the back
room they have three Xboxes and six
Playstations. Before they open, the selfish
employees buy one Xbox and two
Playstations. Using the variables x to
represent Xboxes and p to represent
Playstations, write and simplify an expression
to represent the total inventory of consoles for
the beginning of launch day.