The answer to the equation is 7 and 4/20.
So here is the answer. Given that in 3 bags or trail mix made 18 snack packs, this would mean that in every bag, she can make 6 snack packs because 18 divided by 3 is 6. Hope this is the answer that you are looking for. Have a great day ahead!

Step-by-step explanation:
We know that
cos 2x = 2cos²x - 1
So we have

Substituting 

I believe the answer would be: 4.7.9.11.13.15.17
1.
5514 divided by 82 you have to find out how many times 82 goes into 551 (because it won't go into 5 or 55 now 82 goes into 551 6 times and you multiply 82 and 6 to get 492 (which is the closest you can get to 551 without going over) now you subtract 551-492 to get 59 now you carry down your 4 and add it to the end of the equation and your number changes into 594 now 82 times 7 is 574 when you subtract you get 20 now you add a decimal point and you carry down the 0 to make your number 200 now you do 82 times 2 to get 164 when you subtract you get 36 now you carry down the 0 and get 360 so you multiply 82 by 4 to get 328 so your answer is 67.24.Hope this helps. I can add a picture if you need one.