A. the middle value of a set of data arranged in numerical order is the

Median

Step-by-step explanation:

Median is the number present in the middle when the numbers in a set of data are arranged in ascending or descending order.

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

answer: both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.