Can we add or subtract when we do equivalent ratios?
YES
or
NO

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? ( )

Sum is 17 and their difference is 3

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