I don't know how to write this can someone please help

The mathematical expression 9€ t means

If x = 12 and y = 3, what is the value of x - y 2? 81 6 3 18

Raymond just got done jumping at super bounce trampoline center. the total cost of his session was $43.25 . he had to pay a $7 entrance fee and $1.25 for every minute he was on the trampoline. write an equation to determine the number of minutes (t) that raymond was on the trampoline.