Answer:
19 °F
Step-by-step explanation:
The difference between 2 °F and -17 °F is ...
... difference = 2 °F - (-17 °F) = (2 +17) °F
... difference = 19 °F
_____
Subtracting a number is the same as adding it opposite. Subtracting -17 is the same as adding 17.