What is a mean? Attach a video explaining mean.

Average, which is the sum of values divided by the number of values

Step-by-step explanation:

A mean is another word for average.

Example:

Say you have a group of numbers, a data set it you will.

3 4 5 7 8 9 6 4 2 8 9

1. Add them all up: 3+4+5+7+8+9+6+4+2+8+9 = 65

2. Divide: (total sum of all numbers) ÷ (amount of numbers in set) -- 65 ÷ 11 = 5.909

3. Round to the specified or given amount. (Generally, this is either to the next whole number or the nearest tenth.)

4. Average ≈ 6 (to the next whole number) or Average ≈ 5.9 (nearest tenth)

i saw this question before, dont know the asnwer srry

step-by-step explanation:

system of linear equation

step-by-step explanation:

as given in the data

a= 20 , b= -12

let us suppose that it is a straight line equation

now we know the formula for the system of linear equation

b= ma + c )

here m is slope of a straight line which is equal to formula

m=   (ii)

and here c is a constant

now putting the value of a and b in equation (ii)

m=

m=

putting the value of a,b and m in equation (i) gives us

-12 = + c

-12=-12 + c

adding 12 to both sides

-12 +12 = -12 +12 +c

0 =c

or c=0

as the value of the constant is zero which gives us that it is a linear equation and this order pair satisfies the system of linear equations.