Paula completely cover the square while using 87.5 ft.² of wallpaper without any overlap. Which measurement is closest to the side length of this wall in feet.

EX: 29
+24
= 53

If u add the right side and it's over 9 then you have to put a 1 or whatever the first number is bc you can't put the full number which means you have to take the first number which is a 1 in my ex and put it in the left column. You should do this because u can't put the full.two digits down you have to regroup the 1.