Which expression is equivalent to 8x + 12y?

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

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

25) 56(1) = 5b a. identity property of addition b. identity property of multiplication c. commutative property of multiplication d. commutative property of addition