At the beginning of this month, the balance of mark's checking account was $275.35. so far this month, he has received a paycheck via direct deposit of $987.25, was charged a monthly service fee by his bank of $15.00, used a debit card linked to his account to make a purchase of $43.22, wrote a check for $57.26 that has already been deposited, and deposited a check for $100.00. what is the current balance of mark's checking account?

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.