Answer:
12+9r
Step-by-step explanation:
3*4+3*3r
12+3*3r
12+9r
Answer:

Step-by-step explanation:
Given


Required
Determine the change in temperature
This is calculated by:

Substitute values for New and Initial Temperatures


Hence, the change in temperature is: 
-1
1/4×-2= -2/4 -2/4×2/1= -1