Find at least three nonzero terms (including a 0 and at least two cosine terms and two sine terms if they are not all zero) of the fourier series for the given function, and sketch at least three periods of the function. f left parenthesis x right parenthesis equals left brace start 2 by 2 matrix 1st row 1st column 7 2nd column negative pi less than or equals x less than 0 2nd row 1st column 0 2nd column 0 less than or equals x less than pi endmatrix

Mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.