cristie68
cristie68 cristie68
  • 02-10-2020
  • Mathematics
contestada

help help help please​

help help help please class=

Respuesta :

jimrgrant1 jimrgrant1
  • 02-10-2020

Answer:

see explanation

Step-by-step explanation:

To evaluate f(8), substitute x = 8 into f(x) , that is

f(8) = [tex]\sqrt{2(8)+9}[/tex] = [tex]\sqrt{16+9}[/tex] = [tex]\sqrt{25}[/tex] = ± 5

-----------------------------------------------------

Equating

[tex]\sqrt{2x+9}[/tex] = 3 ( square both sides )

2x + 9 = 9 ( subtract 9 from both sides )

2x = 0 ⇒ x = 0

Thus

f(0) = 3

Answer Link

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