6 x 2 1/5 estimated please hurry

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

5x−4≥12 or 12x+5≤−4 can you with this problem

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?