Which trigonometric ratios are correct for triangle def?

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

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

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.