Graph the integer 3 and its opposite on a number line.

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

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression

Which shows the correct substitution of the values a, b and c from the equation 1=-2x+3x^2+1