13 because you do 18-8 and you get 10 and divide that by 2 and you get 5 then add 5 to 8 and you get 13 and subtract 5 from 18 and you get 13 as well. Hope that helps
Answer:
Congress. would equal 80 due to x being worth 1/4 of y's total.
D is the correct formula that the model represents. Black represents negative values, while white represents positive.