john went on a bike ride to the store 4 miles away. if it took john 3/10 of an hour to get there and 1/2 of an hour to get back, what was his average rate of speed (miles per hour ) for the entire trip?

He concluded that a heavier object dropped from the same height as a lighter object will land

Rick is driving to his uncles house in greenville,which is 120 miles from ricks town .after covering x miles rick she's a sign stating that greensville is 20 miles away. which equation when solved will give the value of x. a: x+120 = 20 b: x x120 =20 c: x +20 equals 120 d: x x20= 120

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