If the cost of 100 copies is $3.10, how many copies can be made for $155?

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

The rumpart family is building a new room onto their house. the width of the new room will be 16 feet. the length of the room will be 4% greater than the width. write an expression to find the length of the new room. what will be the area of this new room?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.