Chase has a rectangular garden which is 5 feet wide and 12 feet long. He wants to divide the garden into four sections by running a line of bricks down both diagonals as shown below. What is the minimum length of bricks that Chase needs in order to divide his garden? I know you use Pythagorean theorem but why?

you use Pythagorean Theorem because when you add the diagonals to the picture it creates a triangle, and it's also a right triangle.

Do you need the answer too?

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

the answer is b