Sandra's final score = -5 1/4
What is fraction?
"It is used to represent the portion/part of the whole thing."
For given example,
After each incorrect question, Sandra looses 3/4 points.
Her overall score was -4 1/2 = - 9/2
She answered the last question incorrectly which makes her total score:
= (-9/2) - (3/4)
= -18/4 - 3/4
= -21/4
= -5 1/4
Therefore, Sandra's final score = -5 1/4
Read more about fraction here:
https://brainly.com/question/21010948
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