3 1/3 + -(2 1/4) +1 5/6

Which statement best describes the polynomial

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

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?