How many weeks was the trip? Has it rained during those two weeks?
They will be dead. See solution.
Practice makes perfect
To explain our reasoning, we will highlight the important parts of the text in red and ignore the rest.
The day before Gerardo returned from a two-week trip, he wondered if he left his plants inside his apartment or outside on his deck. He knows these facts.
If his plants are indoors, he must water them at least once a week or they will die.
If he leaves his plants outdoors and it rains, then he does not have to water them. Otherwise, he must water them at least once a week or they will die.
It has not rained in his town for two weeks.
Since Gerardo has been away for two weeks, and it has not rained for those two weeks, it does not matter if he left them indoors or outdoors. They will be dead, since they did not get any water even if they were outside.
