Write the explicit formula for each arithmetic sequence graphed below. Then find the 25th term. I need help with this _:(´ཀ`」 ∠):
I am very much tired and i'm about to have brain damage :(
i just need the explicite formula and i'll thank you for your help‍♀️
there is no need to do the whole question just the explicit formula.

My sincere apologies for my lack of knowledge‍♀️

(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.