What is the vertex of the quadratic function f(x) = (x – 8)(x + 2)?

The vertex is  (3,-25)

Step-by-step explanation:

Quadratic Function has the form:

Lets use distributive property [a(b+c)=ab+ac] to make the equation given into the vertex form. Thus, we have:

Thus,

a = 1

b = -6

c = -16

The x coordinate of vertex is given as:

Putting the points, we have:

Putting x = 3 into the function, we get y-value of vertex:

The vertex is  (3,-25)

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°