Me, i promise i will give brainliest to the first answer as long as it is correct, i don't care if there is no explanation, just give the right answer

Part A: See detail below.

Part B: Company B charges less than company A for 8 windows.

Part C: The saving using company B for 6 windows is $3.

Step-by-step explanation:

Part A:

Company A: (total charges) = ($6)x(N number of windows)+($12)

Company B: (total charges) = ($5)x(N number of windows)+($15)

Part B:

Company A for 8 windows: 6*8+12=$60

Company B for 8 windows: 5*8+15=$55

Part C:

(Saving) = (6*6+12)-(6*5+15)=48-45= $3

-27√22 or in decimal form: -126.641

Step-by-step explanation:

((−3√2)(9))(√11)

=−27√22

Hope this helps!