Suppose the average temperature for a 4-day period in Chicago, Illinois, is -8°C. After the next day, the 5-day average is -9°C. What was the low temperature for the fifth day? Explain your reasoning by showing your work or writing down your thoughts and answer. (Hint: One way to solve this is to make an equation from what you know about the temperatures.)
A) -10°C
B) -11°C
C) -12°C
D) -13°C
