Respuesta :

wegnerkolmp2741o

Answer:

The input is -7

Step-by-step explanation:

f(x) = 2x + 5,

Let f(x) = -9

-9 = 2x+5

Subtract 5 from each side

-9-5 =2x+5-5

-14 =2x

Divide by 2

-14/2 =2x/2

-7 =x

PrabhakarDeva

Answer:

The would be -7.

Step-by-step explanation:

Given function :-

  • f ( x) = 2x + 5.

given output, f( x) = -9

plug the f(x) as -9.

  • -9 = 2x + 5

Move the constant to the left hand side and change their sign.

  • -9 - 5 = 2 x
  • -14 = 2x

Divide both side by 2.

  • -14/2 = 2x / 2
  • -7 = x

Therefore, the input of this function would be -7.

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