The answer fam is....... 3x - 10
First add the numbers together:
-13+(-5),6,(-7),9=-10
Then divide that number by the total # of numbers, which is 5
-10÷5=-2
The average low temperature is -2.
...which is 6th grade stuff, so I am having a hard time believing, that you are in college and/or are having problems with this.
sin(π/6) is independent of x, so

Answer:
10950
Step-by-step explanation:
1 year = 365
365 × 30
10950