Fred has two pens(red and green).he wants to write the word "yes" and no" with both pens. in how many ways can he write both words with both pens?

Aconvex octagon has interior angles that measures 73 degrees, 172 degrees, 132 degrees, 59 degrees, 154 degrees, 163 degrees, x degrees, 2x degrees find the value of the missing angles

Pls! does anybody know a shortcut for answering these types of questions in the future?

Me. i can't figure out this question. give an explanation too. .