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Suppose that you are taking a course that has three exams which count for three-fifths of your grade and a final which counts for two-fifths of your grade. On your first three tests your scores on were 75, 80, and 74. To get an B in the course, you must have an average of at least 80 percent. What is the minimum score you need on the fourth test to get an B for the course? Round your answer to one decimal.

  • math -

    you need

    3/5 (75+80+74)/3 + 2/5 x = 80
    x = 85.5

  • math -

    8x9 and 8x8 and 8x7 and lastest 8x6

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