6. Why is the x-coordinate of the vertex
of a parabola the mean of the zeros of
the function?

The vertex of a parabola is the point where the parabola crosses its axis of symmetry.If the coefficient of the term is postive Step-by-step explanation:

U shape. the coffiecent of the term negative.

Parabola:

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's