Find the vertex, focus, directrix, and focal width of the parabola. negative 1 divided by 12 times x squared = y

negative 1 divided by 12 times x squared = y

To find vertex we use formula x= -b/2a

From the given equation a= -1/12  and b =0

Plug in the values in the formula

Now plug in x=0 in the given equation and find out y

So y=0

Hence vertex is (0,0), h=0  and k =0

Focus is (h, k+p)

We need to find out p

We know a= -1/12

p = 1/4a

So focus is (0,0-3) that is (0, -3)

Directrix is y = k - p

We know p = -3  and k=0

y = 0 -(-3) = 3. so directrix is y = 3

Focal width = |4p|

We know p = -3

so it becomes |4(-3)| = 12

Focal width = 12

-14

step-by-step explanation:

2x2 – 2(x+4)

=2x2-2（5+4）

=4-2×9

=4-18

=-14

students group

step-by-step explanation:

a person who   joins a party or a seminar can explain his feelings about that particular occasion better more than anyone else.

as bella managed a show for the students in the school and invited students to watch that show

hence

students group will be the best group to survey to find this information