Question

The expression -120+13m represents a submarine that began at a depth of 120 feet below sea level and ascended at a rate of 13 feet per minute. What was the depth of the submarine after 6 minutes?

Answer 1

Answer: The depth was 42 feet below see level after 6 minutes

Explanation:

If m represents the minutes then input 6 for m into the expression and solve.

-120 + 13(6)

-120 + 78 = -42