: Cho các mệnh đề chứa biến P(n):“n là số chẵn ”và Q(n): “7n + 4 là số chẵn ”
1) Phát biểu và chứng minh định lý:với mọi n thuộc N, P(n) kéo theo Q(n)
2) Phát biểu và chứng minh định lý đảo của định lý trên
3) Phát biểu gộp định lý thuận và định lý đảo bằng hai cách

The monetary value earned for selling goods or services to customers is called a.) revenue b.) assets c.) money d.) accounting

Use a standard normal table to determine the probability. give your answer as a decimal to four decimal places. −1.5< < 1.5)

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.