Combine like terms. 48y + 21y = ? ?

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

Which value of y will make the inequality y< -1 false?

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?