Find the length of DM

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

Each cookie sells for $0.50 sam spent $90 on baking supplies and each cookie cost $0.25 to make how many cookies does sam need to sell before making a profit formula: sales> cost

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12