Question

Martina begins a dive at sea level. She dives down 20 feet, and then rises 7 feet.

She dives again, going down 9 more feet. How far below sea level is Martina?

Answer 1

Answer:22

Explanation:

-20+7-9= -22 ft, or 22 ft below sea level

Answer 2

22 feet below sea level

Explanation:

If she goes down by 20 and back up by 7 the overall effect is going down by 13 and then going down 9 more feet makes it a total of 22 feet.