If 3 sisters receive $180 and split it so that the middle sister gets twice as much as the youngest sister and the oldest sister gets three times as much the youngest sister, how much does the youngest sister get?

The surface area (sa) of a cube with a as the length of each of its sides is given by the formula . if the surface area is known, how can you rewrite the formula to find its side?

You’re repairing a large rectangular aquarium. the final step is to cover the glass with a protective film. the front and back of the aquarium measure 4 meters by 2 meters, and the sides of the aquarium measure 3 meters by 2 meters. how many square meters of protective film do you need? ( )

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?