Both have magnitudes of A, so they are equal distances and, by the definition of additive inverses, A + (-A) = 0 and that means that they are opposite.
Of course, they need not be opposite distances: they could be opposite times, or opposite amounts of money.
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Q: What is the rule that states the sequence to be used when evaluating expressions? A: The rule that states the sequence to be used when evaluating expressions is know as the "order of operations."
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