PLEASE HELP they are multiple choice and can have more than one answer on each

I REALLY NEED HELP i’ve been stuck in it to long

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? ( )

Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )

One side of a rectangle is 7 feet shorter than seven times the other side. find the length of the shorter side if we also know that the perimeter of the rectangle is 306 feet.