Final answer:
Molly's final score is calculated by adding her points from each round, which are -4, -5, and +10. The sum of these numbers results in a final score of 1 point.
Step-by-step explanation:
To calculate Molly's final score, we need to consider the points she won and lost in each round of the card game. Losing points will be represented by negative numbers, and winning will be represented by positive numbers.
- In the first round, Molly lost 4 points: -4
- In the second round, Molly lost another 5 points: -5
- In the third round, Molly won 10 points: +10
- We add these together to find Molly's final score: (-4) + (-5) + (+10).
So, the calculation will be:
((-4) + (-5) + (+10)) = (-9) + (+10) = +1
Therefore, Molly's final score after the three rounds is 1 point.