It is five meters east and 10m south (so -10m north). If it flies 10m east then 5m west the total distance east is 5m. The total distance away from the hive is sqrt(10^2 + 5^2) = sqrt(125) = 5sqrt(5)
The bee is now 15 m north and 5 m east of the hive. This can be calculated by tracking each movement step from the hive systematically. The final position after all movements results in coordinates (5, 15).
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