How do you find f'(x) of f(x)=1/(x-3)

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Find the measure of angle b in the following triangle

Adentist's office and parking lot are on a rectangular piece of land. the area (in square meters) of the land is represented by x2+x? 30. a. write a binomial that represents the width of the land.