The domain of f(x) is the set of all real values except 7, and the domain of g(x) is the set of all real values except –3. which of the following describes the domain of (gof)(x)?

idk i would have to be there to under stand it

step-by-step explanation:

idk i would have to be there to under stand it

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

answer:

a=9

step-by-step explanation: lmk if you need a explanation