Sense or nonsense? lori says that 8 is not a factorof 80

Which of the following is true for the relation f(x)=2x^2+1

Solve the equation. 2x - 8(x+1)= 6(2x - 3)

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