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    ally1's Avatar
    ally1 Posts: 1, Reputation: 1
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    #1

    Jan 14, 2010, 04:52 PM
    Solving inequality
    Ann's grade is the average of four scores: Three chapter tests and a final that counts as two chapter tests. She scored 72, 90, and 75 on the chapter tests. What score does she need to have on the final to have a grade at least 80?
    ROLCAM's Avatar
    ROLCAM Posts: 1,420, Reputation: 23
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    Jan 14, 2010, 05:12 PM

    1) 80*5 = 400

    2) 400 - ( 72+90+75) = 163

    3) 163/2 = 82 rounded up.

    The answer 82.
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