How do I find the x in this special triangle?

Given: hf || jk; hg ? jg prove: fhg ? kjg to prove that the triangles are congruent by asa, which statement and reason could be used as part of the proof? fgh ? kgj because vertical angles are congruent. jkg ? hfg because vertical angles are congruent. fhg ? jkg because right angles are congruent. hfg ? kjg because alternate interior angles are congruent.

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)