Paul turns in 25 homework assignments and gets a total of 2456 points. However, he missed some and for those he gets zeros. a) If T equals the total number of assignments, write an expression for the total number of missed assignments. T = 25 + m. b) Write an equation for his average score in terms of the number of assignments he missed. A = 2456 / (25 + m). c) How many assignments did he miss if his average score was 7?