Jimmy and rick are practicing knot-tying for their rock climbing training.  the number of knots that jimmy can complete in  x  days  is modeled by the function  f(x) = 6x  + 10,  and the number of knots rick can complete in  x  days  is modeled by the function  g(x) = 4x  + 15

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.