Is this the correct answer to this question?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Ill mark the brainliest if you me with the these three questions 7,8,9

Desmond wants to sell his car that he paid $8,000 for 2 years ago. the car depreciated, or decreased in value, at a constant rate each month over a 2-year period. if x represents the monthly depreciation amount, which expression shows how much desmond can sell his car for today? \ 8,000 + 24x 8,000 - 24x 8,000 + 2x 8,000 - 2x