1/2 + 1 1/2 + 1/3. you need to change them so that they all have a common denominator and that would be 3/6 + 1 3/6 + 2/6. that's gives you 1 8/6 which equals 2 2/6 which in simplest form is 2 1/3
(11,1) because if you plug in x and y this answer is the only one that gives you 18 in the end
1/7, 2/7, 3/7, 4/7. I believe my answer is correct.