I did these problems recently but the answers weren't in the back of the book
2) f(y)= (y^2-3)/7
Domain: (-?,?)
4) g(x)= (-3)/(x-9)
Domain: (-?,9 ) ? (9,?)
6) h(y)= 2y/(6-y)
Domain: (-?,6) ? (6,?)
8) f(x)= 4x/(x+1)
Domain: (-?,-1) ? (-1,?)
10) h(x)= 4x/(x^2+16)...