Answer:
12n + 5.50
Explanation:
she 12 represents how much money she gets paid from the Martin's family the n is your variable and that stands for each day because you don't kknow how much days she watches the cat but when you multiple the 12 by the n you get your days. you add an additional 5.50 because she has a side job as well with the Clark's family. which is how you get 12n+5.50