Math 6

Question Analysis
This question tests the understanding of subtracting a positive integer from a negative integer in a real-world context. The key concept is that descending below sea level is represented by a negative number, and ascending is represented by a positive number.

Key Concept Explanation
When a submarine descends, it moves to a more negative position, and when it ascends, it moves to a less negative (or more positive) position. The formula for the final position is , where is the descent and is the ascent.

Step-by-step Solution
1. Identify the changes in position: The submarine descends 15 meters and then ascends 7 meters.
2. Represent the descent as a negative number:

Click "Show Answer" to reveal the answer and analysis