Which one of these is a function?

W-16=-12 solve each one step equation plz

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.

You are looking for your first credit card. you plan to use this credit card only for emergencies and to pay the credit card balance in full each month. which credit card feature is most important? a. no annual fee b. low apr c. generous rewards program d. no balance transfer fee select the best answer from the choices provided