Jeremiah spends a winter day recording the temperature once every three hours for science class. At 9 am, the temperature was -3.6°F. Between 9am and noon, the temperature rose 15.4°F. Between noon and 3pm, the temperature went down 15.5°F. Between 3pm and 6pm, the temperature went down 9.3°F. What was the temperature at 6pm? Thank you for checking my work.

IDK

you say thanks for checking your work.

what work?
Just do the math!
-3.6 + 15.4 - 15.5 -9.3 = ______