Distribute to write an equivalent expression: -1/2 (-2x+4y)

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

What are the digits that repeat in the smallest sequence of repeating digits in the decimal equivalent of 24/11?

How many times larger is 6 × 10^12 than 2 × 10^7? a. 30,000 b. 3,000 c. 3,000,000 d. 300,000