the only absolute value would be 4, as the absolute value is the space that the number is away from zero. Both positive and negative four would equal four.
On the other hand, if the negative sign was outside the absolute value ( -|4| ), then the number would be negative.
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All numbers have opposites that are the same as their absolute values.
Absolute deviation from what?
An absolute value doesn't have 2 answers. It isn't even a question. It's always positive.
It is the mean absolute deviation.
NO! abs(2-2)=0 NOT equal to abs(2)+abs(-2)=4 - The above is technically correct, though the more thorough answer is as follows; no because the absolute value of the sum is LESS THEN OR EQUAL TO the sum of the absolute values. The simple proof the the fact that |A+B|<=|A|+|B| is called the triangular inequality. When A and B (or for that matter an infinite number of them) are both positive (or all) or both negative (or all) then they inequality is actually equal, if however any of the numbers have different signs then any other number, the inequality is less then.