Question

Isabella, Matina, and Mateo are scuba diving. Isabella starts her dive on the deck of a boat 2 meters above sea level. She dives down 10 meters from her starting position. how many meters below sea level is Isabella?
+2 (above)
__ (down)

2 + (-10) = (-10) + 2
__ = -8
Matina is swimming at 4 meters below sea level. she swims up 3 meters and then dives down 3 more meters. how many meters below sea level is Martina?

-4 (below)
__ (up)

-5 (down)
__ (down)

3 + (__) = __

Answer 1

Let's solve the two parts of the problem step by step.

### Part 1: Isabella's Dive

1. **Starting Position**: Isabella starts 2 meters above sea level, which can be represented as +2 meters.
2. **Diving Down**: She dives down 10 meters, which we represent as -10 meters.

Now, we calculate her final position:

\[
2 + (-10) = 2 - 10 = -8
\]

So, Isabella is **8 meters below sea level**.

### Part 2: Matina's Swim

1. **Starting Position**: Matina is swimming at 4 meters below sea level, which we represent as -4 meters.
2. **Swimming Up**: She swims up 3 meters, which we represent as +3 meters.

Now, we calculate her position after swimming up:

\[
-4 + 3 = -1
\]

So, Matina is **1 meter below sea level** after swimming up.

3. **Diving Down**: Then, Matina dives down another 3 meters, which we represent as -3 meters.

Now, we calculate her position after diving down:

\[
-1 + (-3) = -1 - 3 = -4
\]

So, after her dive, Matina is **4 meters below sea level**.

### Summary:
- Isabella is **8 meters below sea level**.
- Matina is **4 meters below sea level** after her swim and dive.