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 an

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?

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Gianna 2 weeks 2021-09-11T17:43:57+00:00 1 Answer 0

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    2021-09-11T17:45:34+00:00

    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}.

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45:7+7-4:2-5:5*4+35:2 =? ( )