The square of a number decreased by 15 is equal to twice the number. find the number

Sara has 2 2/3 cup taco meat. she needs 1/6 cup to make one taco. how many tacos can sara make with the taco meat she has?

Milk and ice cream are mixed together for a recipe. the total volume of the mixture is 1 cup. if the milk contains 2% fat, the cream contains 18% fat ,and the mixture contains 6% fat ,how much cream is in the mixture

Abigail made a quilt that has an area of 4800 square inches. the length of the quilt is 1 1/3 times the width of the quilt. what are the dimensions of the quilt