Help plz, i dont know how to do it

For which pair of functions is (gof)(a)=|a|-2?

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

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?