Question

Please help. don’t understand :((

Answer 1

Answer:

Step-by-step explanation:

place x = 19

f(19) = 3 / 19 + 2 - Sqrt 21 - 3

= 3/21 - 4

= - 81/21

= - 27/7

Answer 2

Answer:

f(19) = - $\frac{27}{7}$

Step-by-step explanation:

Given

f(x) = $\frac{3}{x+2}$ - $\sqrt{x-3}$

To evaluate f(19), substitute x = 19 into f(x) , that is

f(19) = $\frac{3}{19+2}$ - $\sqrt{19-3}$

       = $\frac{3}{21}$ - $\sqrt{16}$

       = $\frac{1}{7}$ - 4

       = $\frac{1}{7}$ - $\frac{28}{7}$

       = - $\frac{27}{7}$