Answer: The required expression,
Lee's final score is -55.
Step-by-step explanation:
Given,
The current score of Lee = - 350 points,
Now, he answered 275 point question correctly,
∴ Score he gained = + 275 points,
Again he answered 70 point question correctly,
∴ score he gained = + 70
Finally, he answer 50 point question incorrectly,
∴ Score he gained = - 50 points,
So, the total gaining in score = 275 + 70 - 50
Therefore,
Final score = Current score + Gaining scores = -350+275+70-50 = -55