Answer:
a = $19.70
Step-by-step explanation:
Since she bought 12 student tickets and each costs 10.25, then she spent 12 * 10.25 = $123
That means that the total cost of the adult tickets was $359.40 - $123 = $236.40
The last step is to do $236.40 divided by 12 to find the price per ticket
$236.4 / 12 = $19.70
