Question: 18. (5 pts) Replace the following statement with its contrapositive: If Mark and Peter are from Virginia, then they are Nationals fans. 19. (5 pts)

18. (5 pts) Replace the following statement with its contrapositive: If Mark and Peter are from Virginia, then they are Nationals fans. 19. (5 pts) Show that the inverse and converse are equivalent by constructing a truth table for , or by using known tautologies. 20. (5 pts) Suppose x is a real number. Consider the statement "If , then ." Find the contrapositive

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