Mark is covering an 8-inch-square board with 1-inch-square tiles. he uses gray tiles to make four 2-in. by 2-in. squares. he covers the rest of the board with white tiles.
how many more white tiles than gray tiles will mark use?
four small rectangles inside a larger rectangle. two adjacent sides of the larger rectangle are labeled eight inches and eight inches. the four smaller rectangles appear to be the same size and are all shaded. two adjacent sides of one of the smaller rectangles are labeled two inches and two inches.

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.