What is the mean for this list of numbers? 4, 8, 12, 13
Please answer

Given:

The given values are 4, 8, 12, 13.

To find:

The mean for this list of numbers.

Solution:

We know that,

The number of observations = 4. So,

Therefore, the mean for the given list of numbers is 9.25.

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,