Is y=x+8 an equation that describes a function

What’s the numerical coefficient of 6xy

Find the distance from the theater to the library. leave your answer in simplest radical form if necessary. 12 √12 74 √74

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