Resposta :
[tex] \large \boxed{ \begin{array}{l} f(x) = 3x + 7 \\ f( - 4) = 3( - 4) + 7 \\ f( - 4) = - 12 + 7 \\ f( - 4) = \boxed{ - 5} \\ \\ \\ \boxed{ \boxed{ \boxed{ \large \sf{ \: \maltese \:alternativa~(A) \: }}}}\end{array}}[/tex]
[tex] \large \boxed{ \begin{array}{l} f(x) = 3x + 7 \\ f( - 4) = 3( - 4) + 7 \\ f( - 4) = - 12 + 7 \\ f( - 4) = \boxed{ - 5} \\ \\ \\ \boxed{ \boxed{ \boxed{ \large \sf{ \: \maltese \:alternativa~(A) \: }}}}\end{array}}[/tex]