10) Prove: If n is odd and m is even, then 3n + 5m is odd...

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10) Prove: If n is odd and m is even, then 3n + 5m is odd 9) Give an indirect proof: If n - 6 is an odd integer, then n is an odd integer. 10) Prove: If n is odd and m is even, then 3n + 5m is odd 9) Give an indirect proof: If n - 6 is an odd integer, then n is an odd integer.