At a college bookstore, Carla purchased a math textbook and a novel that cost a total of \( \$ 31.90 \). The price of the math textbook is \( \$ 7 \) more than twice the price of the novel. We want to determine the price of each book. Use the information provided to answer the following questions: (a) Identify what \( x \) and \( y \) should represent in this situation. A \( x= \) the math textbook. \( \boldsymbol{y}= \) the novel. B \( \boldsymbol{x}= \) total number of items bought. \( y= \) total price of items bought. c \( \boldsymbol{x}= \) number of math textbooks available for sale. \( y= \) number of novels available for sale. D \( x= \) the price of the math textbook. \( y= \) the price of the novel. Qour answer is correct. (b) Translate the first sentence: "the total purchase amounted to \( \$ 31.90 \) ", into a math equation. EP Equation: Enter your answer