What is the quadratic function that is created with roots -3 and 1 and a vertex at (-1, -8)

Step-by-step explanation:

To write the quadratic equation, begin by writing it in vertex form

Where (h,k) is the vertex of the parabola.

Here the vertex is (-1,-8). Substitute and write:

To find a, substitute one point (x,y) from the parabola into the equation and solve for a. Plug in (1,0) a x-intercept of the parabola.

The vertex form of the equation is .

7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

step-by-step explanation: