Which inequality has a solid boundary line when graphed?
a. x+y< 7
b. x+7y > 7
c. y+7x> 7
d. y+ x less than or equal to 7

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

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

What two criteria are needed for triangles to be similar