Answer:
Option C.
Step-by-step explanation:
For a given set of N elements:
{x₁, x₂, ..., xₙ}
The mean is given by:
And the variance is given by:
Then for our set:
{70, 80 ,75, 75, 80}
We have 5 elements, then N = 5
The first thing we need to find is the mean.
Then the variance will be:
The correct option is C, 14.
7x+10=1/3×(12x-3)+14x
7x+10=1/3×3(4x-1)+14x
7x+10=(4x-1)+14x
7x+10=4x-1+14x
7x+10=18x-1
7x-18x=-1-10
-11x=-11
x=1
this is not factorable so you must apply the quadratic formula and you'll end up with
x=-5-2i
x=-5+2i
Answer:
Plural of Axis. Pronounced "ak-seez". Axes often means the "x" and "y" lines that cross at right angles to make a graph. See: Axis (graph) Cartesian Coordinates.
Step-by-step explanation:
