In the accompanying diagram of ABC, D is a point on AB and E is a point on BC such that DE is parallel to AC. If
DB is 2 less than AD, AC is 5 more than AD, and DE = 4,
find the length of AD to the nearest tenth.

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.