# The mean of the numbers 8, 12, 13, 15, 17, 19 and y is 16. what is y?

28

To calculate an average, you add all the values and then divide by the number of values, so

Now simplifying the known numbers,

Multiply both sides by 7 and then subtract 84

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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