Sand costs three times as much as rocks per pound. If sand is $9.60 per pound, how much are rocks per pound?

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

How can you find the magnitude of a vector, v = < x,y > , where the horizontal change is x and the vertical change is y?