Lewis wants to play several games of paintball with his friends. at the park, it costs $12.49 for admission and paintballs, and $6.21 for each game he plays. which of the following equations could be used to determine lewis's total cost for several games of paintball?

(let x represent the number of games lewis plays and y represent his total cost.)

a. y = $12.49x + $6.21
b. y = $6.21x + $12.49
c. y = $6.21x
d. $12.49y = $6.21x