What is the vertex of the quadratic function? f(x)= (x-8)(x-4)

C

Step-by-step explanation:

The vertex lies on the axis of symmetry which is located at the midpoint of the zeros.

Given

f(x) = (x - 8)(x - 4)

To find the zeros let f(x) = 0, that is

(x - 8)(x - 4) = 0

Equate each factor to zero and solve for x

x - 8 = 0 ⇒ x = 8

x - 4 = 0 ⇒ x = 4

Thus

= = = 6

Substitute x = 6 into f(x) for corresponding y- coordinate of vertex

f(6) = (6 - 8)(6 - 4) = (- 2)(2) = - 4

Vertex = (6, - 4 ) → C

6,250

step-by-step explanation:

to get the area, multiply 360 by 160.(57,600)

to find out how many bags of fertilizer it will take, first figure out how many square feet one bag can hold. divide 1000 by 8(125) to get the unit rate(how many square feet one pound of fertilizer can hold)and multiply it by 50(6250). if i haven't made a mistake, that is the answer.