The arithmetic mean provides a single measure for a certain population, also called the average.
The sum of a set of numbers divided by the total number of numbers in the set is known as the arithmetic mean or arithmetic average in mathematics and statistics.
The ratio of the total number of observations divided by the sum of all the given observations is known as the arithmetic mean. For instance, if the data set contains 5 observations, it is possible to get the arithmetic mean by adding all 5 of the given observations and dividing by 5.
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(n-4)(n+11) so pretty much B
Answer:25
Step-by-step explanation:
Answer:
16/81
Step-by-step explanation:
according to BODMAS-first settle the bracket
8×2=16
3^4=81
therefore it becomes
16/81.
Answer:
See below.
Step-by-step explanation:

because we combine like terms. You will essentially ignore the x and just do -2 + 1, which is -1. So, the answer would be -1x which is simply just -x.
To see why we can combine like terms, use the distributive property. So we have:

This is the same thing as saying:

Factor out the x:

Add:

And simplify:
