189.5= (n+n)÷4 you would set up sort of like a proportion to solve 189.5 = (n+n)÷4. you would divide each side by 4 because you are doing pemdas backwards so 189.5÷4= 47.37 47.37 = n+n and you know n and n are the same so divide 47.37 by 2 to get 23.68 23.68=n
Sets A and B are both functions because they all have different x values. Set C is not a function because it repeats the x value of 2 and gives it two different y values.
