Show that (2+3) + 6= (6+3) +2

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

Sole with work in 10 years, the average number of hours of tv watched per week by teenagers dropped from 23.9 to 21.4. find the percent of change.

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?