The amount of temperature decreased is :
320 - 280 = 40
The percentage of temperature decreased is :
40 / 320 x 100 % = 12.5 %
The answer is option B. 12.5 %
hope this helps
Well.. .not exactly what you're asking, but the relationship of them is

so... hmm to add some
for example let's say
Answer:
Hello I'lll solve this problem.
Step-by-step explanation:
So the answer is actually C. I did the work.
2x - 3y = - 2
3x - 2y = 12
the value of X in the solution to the system is 4.