Anonymous
Anonymous asked in Science & MathematicsMathematics · 1 decade ago

Help Neded in Algebra! Thanks tons!!?

Joe's Electric made 18 customer calls last week and 21 cals this week How many calls must be made next week in order to mainatin an average of at least 21 calls fo the three week period?

At least ___ calls must be made to maintain an average of 21 clls.

Thanks tons!!

8 Answers

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  • Best Answer

    (18+21+x)/3 = 21

    18+21+x = 63

    39+x = 63

    x = 24

  • 1 decade ago

    24 calls

    an average of 21 for 3 weeks means a total of 63

    63 -18 -21 =24

  • Anonymous
    1 decade ago

    simple (18+21+x)/3 = 21

    18+21+x = 63

    39+x = 63

    x = 24

  • 1 decade ago

    24 calls

    Here's why:

    Find the average

    18+21+24=63

    63 divided by 3=21

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  • 1 decade ago

    24

  • 1 decade ago

    You know how to calculate an average of three things:

    A = (a + b + c)/3

    This question gives you the A, and leaves out one of the other values. How would you go about solving that?

  • 1 decade ago

    (18+21+X)/3=21

    39+X=63

    X=24

    24 calls

  • 4 years ago

    F(t) = $750 - $25t Answer: $750 - $25t is the value of fax machine t months after purchase.

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