A friend is planning a trip to Alaska. He purchased a coat that is recommended for outdoor temperatures from -15°F to 45°F. Let t represent the temperature for which the coat is intended.

Answer 1

What is your question?

Answer 2

I understand the question is quite old by now, but seeing as I came across this question confused myself, came up empty and this is one of the top results on Google, figured it was worth posting an answer to. This is looking for an absolute value inequality to represent it - which would come out to be:

|t - 15| ≤ 30