Anyone know the missing angle ?

Write the sentence as an equation. b increased by 281 is d

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? ( )

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)