So I'm on Khan and this is the question I can't figure out is Graphing, and I might get grounded, please help

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Which number line represents the solution set for the inequality - x 24?

Maurice has 54 fewer comic books than rebecca. they have 130 comic books together .how many comic books are in maurices collection ? how many comic books are in rebeccas collection