What is the surface area of the rectangular prism?

Formula for surface area of a rectangular prism is SA = 2lw+2lh+2wh
Please add a good explanation.

396 in²

504 in²

198 in²

312 in²

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.

State one method by which you can recognize a perfect square trinomial.