anonymous
  • anonymous
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)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
will fan and medal!?!??!
misty1212
  • misty1212
HI!!
anonymous
  • anonymous
hi

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misty1212
  • misty1212
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 ?
anonymous
  • anonymous
i really dont get like any of it
misty1212
  • misty1212
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
anonymous
  • anonymous
3/48
anonymous
  • anonymous
negative
misty1212
  • misty1212
not very close actually the b goes up top, the a goes in the bottom
anonymous
  • anonymous
ok
anonymous
  • anonymous
24/6
misty1212
  • misty1212
\[\huge -\frac{\color{blue}b}{2\times \color{red}a}\]yeah that looks good
anonymous
  • anonymous
24/6
misty1212
  • misty1212
of course 6 goes in to 24 evenly so your answer is not a fraction, it is a whole number
anonymous
  • anonymous
4?
misty1212
  • misty1212
no not 4? just 4
anonymous
  • anonymous
-4?
misty1212
  • misty1212
no \[24\div6=4\] you had it right the first time q
anonymous
  • anonymous
ok so the awnser would be B
anonymous
  • anonymous
???
misty1212
  • misty1212
idk does B have a 4 as the first coordinate?
anonymous
  • anonymous
yes
anonymous
  • anonymous
@misty1212 can you help me with one more

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