Please answer correctly

Ahomeowner plans to hang wallpaper on one wall of a bedroom that is 10 feet long if a stripe of wallpaper is 20 inches wide and stripes or hung vertically how many stripes on wall paper with the homeowner required

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

What does x = in this equation x+3+2x=x+5