What is the inverse of function ? f(x) = rootx + 7
A. F^-1(x)= x^2 +7, for x > -7
B. F^-1(x) = (x – 7)^2, for I > 7
C. F^1(x) = (x + 7)^2, for x > -7
D. F^-1(x) = x^2 – 7, for x > 7

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