Hannah sees an empty aquarium that can hold 25 gallons of water. There is a pump that can fill the aquarium with water at a constant rate. Hannah comes by later and sees the aquarium has 5 gallons of water. Two Minutes later the aquarium now has 8 gallons of water. A. At what rate is the amount of water in the aquarium changing?
B. How many more minutes will it take for the aquarium to fill completely?
C. How many more minutes before hannah arrived did it take the aquarium to fill up with 5 gallons of water?

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.