Help please :( I forget how to do this

In trapezoid klmn, kj=19.2 and jm=22.5. identify ln.

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

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