What is the area of Triangle E?

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

Adolphin is swimming with her friend. the dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. what is the position of the dolphin's friend relative to the surface of the water? meters

Perform the indicated operation and write the answer in the form a + bi. (-5 + 2) + (3 - 6i)