What addition doubles fact can you find 4+3? explain how you know?

Solve the system of equations. y= 2x y= x^2 - 15

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.

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?