help bro the thing is at 25 points this is a diamond problem x is 1/3 and y is -4/6 what are xy and x+y also im not actually in highschool

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

Which statement about the relative areas of δabc and δxyz is true? the area of δabc > the area of δxyz the area of δabc < the area of δxyz the area of δabc = the area of δxyz more information is needed to compare.

Kayla has a $500 budget for the school party.she paid $150 for the decorations.food will cost $5.50 per student. what inequality represents the number of students,s, that can attend the party?