30 points! Which of the following is a disadvantage of systematic random sampling? A. The system might match a pattern in the system and fail to detect it, missing important variations in the data.

B. We choose only one random number at the start of sampling.

C. It can be difficult to decide how to group the population.

D. It requires expensive, sophisticated computers to generate random numbers.

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.