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anonymous

  • one year ago

The equation f(x) = 3x2 − 24x + 8 represents a parabola. What is the vertex of the parabola? (−4, 152) (4, −40) (−3, 107) (3, −37)

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  1. anonymous
    • one year ago
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    will fan and medal!?!??!

  2. misty1212
    • one year ago
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    HI!!

  3. anonymous
    • one year ago
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    hi

  4. misty1212
    • one year ago
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    first coordinate of the vertex of \(y=ax^2+bx+c\) is always \(-\frac{b}{2a}\) in your case \(a=3\) and \(b=-24\) what do you get ?

  5. anonymous
    • one year ago
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    i really dont get like any of it

  6. misty1212
    • one year ago
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    what i meant was "what do you get for \[-\frac{b}{2a}\]when you replace \(a\) by \(3\) and \(b\) by \(-24\) and do the arithmetic

  7. anonymous
    • one year ago
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    3/48

  8. anonymous
    • one year ago
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    negative

  9. misty1212
    • one year ago
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    not very close actually the b goes up top, the a goes in the bottom

  10. anonymous
    • one year ago
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    ok

  11. anonymous
    • one year ago
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    24/6

  12. misty1212
    • one year ago
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    \[\huge -\frac{\color{blue}b}{2\times \color{red}a}\]yeah that looks good

  13. anonymous
    • one year ago
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    24/6

  14. misty1212
    • one year ago
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    of course 6 goes in to 24 evenly so your answer is not a fraction, it is a whole number

  15. anonymous
    • one year ago
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    4?

  16. misty1212
    • one year ago
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    no not 4? just 4

  17. anonymous
    • one year ago
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    -4?

  18. misty1212
    • one year ago
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    no \[24\div6=4\] you had it right the first time q

  19. anonymous
    • one year ago
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    ok so the awnser would be B

  20. anonymous
    • one year ago
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    ???

  21. misty1212
    • one year ago
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    idk does B have a 4 as the first coordinate?

  22. anonymous
    • one year ago
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    yes

  23. anonymous
    • one year ago
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    @misty1212 can you help me with one more

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spraguer (Moderator)
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