Find the greatest common factor for 21x3 and 28x5

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? ( )

On a piece of paper, graph y< x+1. then determine which answer matches the graph you drew.

See attachment below and find the equivalent of tan(∠qsr)