Step-by-step explanation:
first solve for h
[tex]fh(4)=f(\frac{4+3}{3} )=f(\frac{7}{3} )[/tex]
[tex]f(\frac{7}{3} )=-3(\frac{7}{3} )-1=-7-1=-8[/tex]
[tex]so fh(4)=-8[/tex]