What is the value of x?

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

Which of the following circles have their centers in the third quadrant?

Matt had 5 library books. he checked out 1 additional book every week without retuening any books. whats the matching equation