Liliana has $3.90 in nickels and quarters in her backpack. She has 24 more nickels than quarters. How many coins of each type does she have? nickels quarters?

The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.

What two criteria are needed for triangles to be similar

The volume of a cube-shaped shipping container is 13,824 cubic inches. find the edge length of the shipping container.