Sometimes
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They always have a numerator but, if they are integers, the may not have a denominator.
Integers are whole numbers. Rational numbers can be fractions / decimals. But it is NEVER a whole number E.G. of rational numbers : 3/4 or 1.5
Never, if you add 2 posotives together (every posotive is greater than 0) then it will be greater than 0
It's never. A factor divides into a number without remainder, so the biggest it can be is the number itself.
an equation ---------- has a soultion? a)always B)sometimes C)never