Ella wants to buy a new necklace. The are currently 15% off. If the price of the necklace is represented by x, which expression or expressions represent how much the necklace would cost after the discount? (select all that apply)

a 0.15x
b x - 0.15
c 0.85x
d x(1 + 0.85)
e x - 0.85
f x(1 - 0.15)

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field