Respuesta :

henryhuangbc

Answer:

f(x)=(5+a)/(a-1)

Step-by-step explanation:

input a+2 for x

f(x)=(a+5)/(a-1)

and no ur not dumb u just need practice :D

HelpfulHuman13

Answer:

-4 and 1/7 is your answer.

Step-by-step explanation:

  • substitute 19 for x in the equation.

[tex]f(x)=\frac{3}{19+2} -\sqrt{19-3}[/tex]

  • do the processes.
  • [tex]f(x)=\frac{3}{21} -\sqrt{16}\\f(x)=-\frac{1}{7} -4\\f(x)= -4\frac{1}{7}[/tex]