Answer: C
Step-by-step explanation:

Hi! They are- A,C,E, and F sorry if I’m wrong! Have a great day! :)
Subtract 13 from both sides:


Divide both sides by -5. Since this is a negative number, you have to invert the inequality sign:

Which means
Answer:
<h3>The standard error of the mean is <u>15</u></h3>
Step-by-step explanation:
Given that a simple random sample of 64 observations was taken from a large population.
Hence it can be written as n=64
The population standard deviation is 120.
It can be written as 
The sample mean was determined to be 320.
It can be written as 
<h3>To find the standard error of the mean :</h3>
The formula for the standard error of the mean is given by

Now substitute the values in the formula we get




<h3>∴ The standard error of the mean is 15</h3>
They both represent the expression, because when simplified the expression equals 8x+4, but you could also write it like 2(3x+2)+2x