Question

determine a valid conclusion and the law of logic by which it is valid. if a hurricane approaches, then school will be closed. if school is closed, then practice will be cancelled.

Explanation:

The Law of Syllogism allows us to draw a conclusion from two conditional statements where the conclusion of one is the hypothesis of the other. Here, the first statement is "If a hurricane approaches, then school will be closed" and the second is "If school is closed, then practice will be canceled". By the Law of Syllogism, we can conclude that if the first - part of the first statement (hurricane approaches) is true, then the second - part of the second statement (practice is canceled) is true.

Answer:

Conclusion: If a hurricane approaches, then practice is canceled.
Law of Logic: Law of Syllogism