Question

in which of these situations do the quantities combine to make 0? A. A dolphin swims 20 feet straight down from the surface. It then rises 20 feet to return to the surface. B. Scott earns $20 at his family's garage sale. He then earns $20 walking dogs for his neighbors. C. Travis receives $10 from a friend to pay for a concert ticket. He then spends $20 on tickets for his friend and himself. D. A scuba diver drops 30 feet below sea level. He then swims 30 feet across the ocean floor.​

Answer 1

Answer A

Explanation:

This is the correct option as you are going feet down and then 20 feet back up. So basically, an equation that would represent this is -20+20=0.

Answer 2

A. A dolphin swims 20 feet straight down from the surface. It then rises 20 feet to return to the surface.

Explanation:

It goes down 20 then up 20

-20 + 20 = 0