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anonymous

  • 5 years ago

The number of tickets sold each day for an upcoming performance of Handel's Messiah is given by N(x)=-0.4x^2+10.4x+13, where x is the number of days since the concert was first announced. When will daily ticket sales peak? and how many tickets will be sold that day?

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  1. anonymous
    • 5 years ago
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    is it \[.4x^2+10.4x+13\]?

  2. anonymous
    • 5 years ago
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    find the vertex of the equation

  3. anonymous
    • 5 years ago
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    yes

  4. anonymous
    • 5 years ago
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    if so max is given when \[x=\frac{-b}{2a}\] what mr orchestra said

  5. anonymous
    • 5 years ago
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    i get -13 but i must have read it wrong . oh wait

  6. anonymous
    • 5 years ago
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    \[-.4x^2+10.4x+13\]

  7. anonymous
    • 5 years ago
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    \[\frac{-b}{2a}=\frac{-10.4}{2\times -.4}=13\]

  8. anonymous
    • 5 years ago
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    then replace x by 13 and see what you get.

  9. anonymous
    • 5 years ago
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    24.62?

  10. anonymous
    • 5 years ago
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    11.61

  11. anonymous
    • 5 years ago
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    not what i got

  12. anonymous
    • 5 years ago
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    oops i forgot the - sign again!

  13. anonymous
    • 5 years ago
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    i got 80.6 let me try again

  14. anonymous
    • 5 years ago
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    got it twice

  15. anonymous
    • 5 years ago
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    I will keep trying I'm not sure what I'm doing wrong

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