Math

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Karen has an 86% average after 4 grades, what grade does she need to get in order to bringer average up to an 88%?

  • Math -

    I need a formula to solve the question.... If anyone has a clue I would love it

  • Math -

    I think its ..
    a+b+c+d/4=86
    86x4=344
    a+b+c+d=344
    a+b+c+d+e=(88x5)
    a+b+c+d+e=440
    440-344=96
    I THINK THE ANSWER IS 96

  • Math -

    explain how you can use multiplication to help you find 20 divide by 5

  • Math -

    explain how you can use multdivide5 iplication to help you find 20



    \\

  • Math -

    20x .25

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