Never, if you add 2 posotives together (every posotive is greater than 0) then it will be greater than 0
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Sometimes
They always have a numerator but, if they are integers, the may not have a denominator.
Sometimes.* If "n" is positive, "-n" is negative. * If "n" is negative, "-n" is positive. * If "n" is zero, "-n" is also zesro.
No. Just like positive integers, negative integers stretch out to infinity. There will never be a least negative integer.
an equation ---------- has a soultion? a)always B)sometimes C)never