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Sagot :
Answer:
Let's analyze Alexis's walk:
1. **Distance Covered**:
- Alexis walks 10 km west to the grocery store.
- She then walks 10 km east back to her house.
The total distance covered is the sum of both segments of her walk:
\text{Total distance} = 10 \text{ km} \text{ (west)} + 10 \text{ km} \text{ (east)} = 20 \text{ km}
2. **Displacement**:
- Displacement is the straight-line distance between the starting point and the ending point, considering direction.
- Since Alexis returns to her original starting point, her displacement is 0 km.
In summary:
- **Distance covered**: 20 km
- **Displacement**: 0 km
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