If A = 3x2 + 5x - 6 and B = 2x2 + 4x + 7, then A + B equals

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

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?

Tan198=asin164=? how to solve this? ?