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DJJo

  • one year ago

Please help I'm so confused

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  1. DJJo
    • one year ago
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    The function f(x) = −x2 + 44x − 384 models the daily profit, in dollars, a shop makes for selling donut combos, where x is the number of combos sold and f(x) is the amount of profit. Determine the vertex.

  2. Nnesha
    • one year ago
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    formula to find vertex is x=-b/2a

  3. TheSmartOne
    • one year ago
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    for the equation ax^2 + bx + c (-b/2a, f(-b/2a)) is the vertex

  4. DJJo
    • one year ago
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    ok so -44/2(-1)?

  5. Nnesha
    • one year ago
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    x-coordinate of vertex* then substitute x for its value into f(x) function to find y-coordinate

  6. TheSmartOne
    • one year ago
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    ye

  7. Nnesha
    • one year ago
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    right!

  8. DJJo
    • one year ago
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    -44/-2 = 22

  9. TheSmartOne
    • one year ago
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    now plug 22 into that equation again :)

  10. DJJo
    • one year ago
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    f(22) = −(22^2) + 44(22) − 384 f(22) = -484 + 968 - 384 f(22) = 484 - 384 f(22) = 100

  11. Nnesha
    • one year ago
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    great tthat's y-coordinate of vertex done! good job!

  12. DJJo
    • one year ago
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    Thank you so so much!!!!

  13. Nnesha
    • one year ago
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    np :=)

  14. TheSmartOne
    • one year ago
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    good job :)

  15. DJJo
    • one year ago
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    thanks @TheSmartOne

  16. TheSmartOne
    • one year ago
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    anytime :)

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