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OpenStudy (anonymous):
Which property would be useful in proving that the product of two rational numbers is ALWAYS rational? A)a/b+ c/d= ad + bc/bd B)a + b/cd = a/cd+ b/cd C)a/b · c/d = ac/bd D)a/b÷ c/d= a/b · d/c
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OpenStudy (anonymous):
C, because that is how you multiply fractions
OpenStudy (anonymous):
whats wrong with a and b if you dont mind me asking?
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