Answer:
The required algebraic expression is
where x is the number of games and y is the total cost.
Step-by-step explanation:
Consider the provided information.
It is given that the cost price of computer is $499.00
Let x represents the number of games Homer and Bart bought and y is the total purchasing cost of the computer (before sales tax).
It is given that the cost of each game is 49.99.
If they bought x games, then the total cost will be:

Therefore, the algebraic expression is
where x is the number of games they bought and y be the total cost.