Karen’s family is having people over to watch a football game they plan to serve sparkling water and pretzels they will need to purchase bottled water and pretzels for the game a bottle of sparkling water contains 22 ounces and cost dollar 1.50 a package of pretzels contain 16 ounces and cost 2.99 identify what you do not know and assign a variable write an equation to model how much money it will cost