Answer:
-12°F
Step-by-step explanation:
2 P.M
-35° F + 29° F= -6° F
The temperature had risen by 29°F meaning it went up by 29.
Adding negative 35 and positive 29 is the same as subtracting 35 from 29.
29 - 35 = -6
6 P.M
-6° F - 18°F = -12°F
The temperature had fallen by 18°F meaning it went down by 18°F.
p.s don't forget the label °F