Yesterday the temperature at noon was 12.2°F. By midnight, it had dropped by 20.9°F. What was the temperature at midnight?

The temperature dropped down to -8.7°F

Step-by-step explanation:

12.2°F - 20.9°F = -8.7°F

the answer is c hope it

step-by-step explanation:

answer: c

substitute in the values.

for a:

f(0) = 0 + 9

f(0) = 9

a is a solution.

for b:

f(7) = 14 + 9

f(7) = 23

b is a solution.

for c:

f (3) = 6 + 9

f(3) = 15

c is not a solution. it's supposed to be 14.

for d:

f(2) = 4 + 9

f(2)= 13

d is a solution.