Which expression has the sum of 11/12 A. 1/12+5/12+5/12
B. 5/4+3/4+3/4
C. 5/6+6/6
D. 10/12+2/12

I’m 13 and don’t understand this at all.

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

For how answer my question this will be the last question can you answer in math subject

Which system of linear inequalities is represented by the graph? x-3y > 6 and y? 2x + 4 x + 3y > 6 and y? 2x - 4 x - 3y > 6 and y? 2 - 4 x + 3y > 6 and y > 2x + 4 no be 2 -1.1 1 2 3 4 5 submit save and exit next mark this and retum be