How to do this? ? give me a solution its confusing me?

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

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

We have enough material to build a fence around a station that has a perimeter of 180 feet the width of the rectangular space must be 3 1/4 feet what must the length be