Question

each question sandra answers incorrectly changes her overall score by -3/4 points. sandra's overall score was -4 1/2 points, and then she answered the last questions incorrectly. What was sandra's final score?

Answer 1

Answer:

Sandra's final score is $-5\frac{1}{4}$.

Step-by-step explanation:

It is provided that each question Sandra answers incorrectly changes her overall score by -3/4 points.

That is, for every incorrect answer Sandra looses 3/4 points.

At a moment Sandra's overall score was $-4\frac{1}{2}$ points.

And then she answered the last questions incorrectly.

Compute the final score as follows:

Final score = Sandra's overall score - $\frac{3}{4}$

                   $=-4\frac{1}{2}-\frac{3}{4}\\\\=-\frac{9}{2}-\frac{3}{4}\\\\=\frac{-18-3}{4}\\\\=-\frac{21}{4}\\\\=-5\frac{1}{4}$

Thus, Sandra's final score is $-5\frac{1}{4}$.