Interest problems I’m in business Econ and I’m having help with Annuity present value and amortization if u can help me can u

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

Acoin bank containing only dimes and quarters has 12 more dimes than quarters. the total value of the coins is $11. how many quarters and dimes are in the coin bank?