Which method will solve this equation completely? 5 – 8d = 16

Fiona and her friends are playing a game by guessing where a coin will land when it is randomly dropped inside the square shown below. fiona guesses that the coin is likely to land in the blue area. which explains whether or not fiona is correct and why?

Which of the following expressions is equal to 2x^2+8

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me