$315.35 and 6% for sales tax how much is sales tax

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

State one method by which you can recognize a perfect square trinomial.

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?