Write down the equation of the line marked A

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?