Melody has a credit card that uses the previous balance method the opening balance of one of her 30 day billing cycles was 0$

What graph correctly matches the equation y equals two negative x

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

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