Over the course of two weeks, al spent $105.00 on lunch. what was the average cost per day?

(14 ,73) Because to find how many lines are in the ad that costs $73 you need to subtract the initial cost of the add from the total, which is 56, and to find how many lines were in it you need to divide 56 by 4, which is 14. And the second one is the same math but the ordered pair there is (9, 53) and the equation there is 53 = 4(9) + 17.