15-12=3÷n how do i get the answer do i dived 3÷n

What is 20+(5 x 2/5 )+ 3 show your work

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?

Which choice has the correct steps in graphing the solution set to the following inequality? -45_> 20x-5y