Question

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)

Answer 1

will fan and medal!?!??!

Answer 2

HI!!

Answer 3

hi

Answer 4

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 ?

Answer 5

i really dont get like any of it

Answer 6

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

Answer 7

3/48

Answer 8

negative

Answer 9

not very close actually
the b goes up top, the a goes in the bottom

Answer 10

ok

Answer 11

24/6

Answer 12

\[\huge -\frac{\color{blue}b}{2\times \color{red}a}\]yeah that looks good

Answer 13

24/6

Answer 14

of course 6 goes in to 24 evenly so your answer is not a fraction, it is a whole number

Answer 15

4?

Answer 16

no not 4? just 4

Answer 17

-4?

Answer 18

no \[24\div6=4\] you had it right the first time
q

Answer 19

ok so the awnser would be B

Answer 20

???

Answer 21

idk does B have a 4 as the first coordinate?

Answer 22

yes

Answer 23

@misty1212 can you help me with one more