Question

Tomas works as an underwater photographer. He starts at a position that is 13 feet below sea level. He rises 6 feet, then descends 16 feet to take a photo of a coral reef. Enter an expression to find his position relative to sea level when he took the photo and then evaluate the expression.

Answer 1

-13 + 6 - 16

Explanation:

He starts at 13 beneath the surface, so 13 beneath 0 (-13). Then he rises up 6, so + 6. After that, he lowers 16 one last time, so subtract 16.

Answer 2

Think of sea level as 0 on a number line

-13 + 6 - 15

Explanation: