What is nine of the sum of three succesive odd

You have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint? you have a 32-foot fence around a square garden. there are 4 equal sections. you paint 13 of one section of the fence. what fraction of the fence did you paint?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

John has 1/2 pound of oranges to share with julie. if they share the oranges equally, how much will each of them have?