Helpoppooopp

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

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.

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'