64, -48, 36, -27. Which formula can be used to describe the sequence? O f(x + 1) = f(x)
O f(x + 1) = -f(x)
O f(x) = f(x + 1)
O f(x) = -f(x + 1)

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