Which expression is equivalent to 6(8-n)-8

Which of the following is true for the relation f(x)=2x^2+1

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.

Joey is asked to name a quadrilateral that is also a rhombus and has 2 pairs of parallel sides. should be his answer