Matilda and lorraine work in the mail room of a large company sorting letters. matilda has already sorted 50 letters and continues sorting at a rate of 50 letters per hour. lorraine has already sorted 80 letters and continues sorting at a rate of 40 letters per hour. which function can matilda and lorraine use to determine the total number of letters they have sorted after x hours? how many letters will they have sorted after 6 hours? the function that describes the total number of letters sorted by matilda and lorraine in x hours is given by f(x) = 90x + 130. thus, they will have sorted 670 letters in 6 hours. the function that describes the total number of letters sorted by matilda and lorraine in x hours is given by f(x) = 90x + 30. thus, they will have sorted 570 letters in 6 hours. the function that describes the total number of letters sorted by matilda and lorraine in x hours is given by f(x) = 130x + 90. thus, they will have sorted 870 letters in 6 hours. the function that describes the total number of letters sorted by matilda and lorraine in x hours is given by f(x) = 100x + 120. thus, they will have sorted 720 letters in 6 hours.