Answer:
Adult-. $4
Student-. $2.50
Explanation:
equation
1a + 3s = $11.50
3a + 2s = $17.00
$4+$2.50(3)=$11.50
$12+$2.50(2)=$17.00
or
1($4)+3($2.50)=$11.50
3($4)+2($2.50)=$17.00
sorry if this is a little confusing, this is a simpler equation-
$4.00+($2.50x3)=$11.50
($4.00x3)+($2.50x2)=$17.00