For the first statement:
"If it is Monday, then the library is closed. Today is Tuesday."
- The conclusion is: The library is not closed. Since today is Tuesday, the condition for Monday is not met, so we cannot conclude that the library is closed.
For the second statement:
"If a coin is a quarter, then it is worth 25 cents. If a coin is worth 25 cents, then 4 would make a dollar."
- The conclusion is: If a coin is a quarter, then 4 would make a dollar. This conclusion can be drawn based on the transitive property of the statements provided.
So, to summarize:
- The library is not closed.
- If a coin is a quarter, then 4 would make a dollar.