Your car stereo can be programmed to hold six radio stations of your choice. there are nine stations you really like. how man different ways can you program your six buttons with different collections of your favorite stations? (a different ordering of the same six stations counts as different programming.) this is my guess 9! /(9-6)! = 9! /3! = 9 * 8 * 7 * 6 * 5 * 4 = 60,480.

(50 ) 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.