5. The union of sets {3, 4, 7} and {3, 4,9} is the A. {3, 4, 9,2} C. {3, 4, 3, 4 B. {3,4,7,9) D.{3, 4, 5, 6]
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eysieee31
Answer:{3,4,7,9}Step-by-step explanation:you just combine the two sets and when each set has the same number you will only write it once, and the writing of the set will start with the lowest number
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