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masha68 [24]
3 years ago
11

F(x) = x + 2

Mathematics
1 answer:
kow [346]3 years ago
6 0

Answer:

  (fg)(x) = x^2 -2x -8

Step-by-step explanation:

(fg)(x) = f(x)·g(x) = (x +2)(x -4)

  = x(x -4) +2(x -4) = x^2 -4x +2x -8

  = x^2 -2x -8 . . . . matches the 3rd choice

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I'm stuck on this question, please help. Thank you!!! ​
anastassius [24]

Let's multiply each of the four squares, one by one.

In blue, we see the dimensions are x by x.  x times x = x^2

In pink, we see the dimensions are 9 by x.  x times 9 = 9x

In green, the dimensions are x by 3.  3 times x = 3x

And finally, yellow's dimensions are 3 by 9.  3 times 9 = 27

We can now just add all these areas to find the total area:

x^2 + 12x + 27

6 0
2 years ago
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stiks02 [169]

3x + 5x = 320

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x = 40

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The best answer would be Option C.

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3 years ago
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DerKrebs [107]
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7 0
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dusya [7]

Answer:

The answer is D

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