A line of 1.5 billion people stretched 512890 miles long what is the average shoulder length ? In feet

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

Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827