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stepladder [879]
3 years ago
10

Evaluate f(x) = 5x2 - 4x - 9 for f(-2)

Mathematics
1 answer:
Svetllana [295]3 years ago
8 0

Answer:

99

Step-by-step explanation:

5x^2 -4x -9

5(-2)^2 -4(-2) -9

-10^2 +8 -9

100-1

99

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Answer:

327

Step-by-step explanation:

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Lol i need help again plzz
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X would equal 81 because the square root of 81 is 9.

9 x 9 = 81
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Cody and Jordan were selling Flamin' Hot Cheetos to raise money for the Tornados. Cody sold 5 bags of Cheetos for every 3 bags J
andrew11 [14]

They sold 160 and for each 5 bags sold by one 3 bags are sold by another 3+5=8.

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Answer:

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Step-by-step explanation:

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Solve the following system of equations algebraically:<br> y = x^2+7x−4 <br> y = −x−4
oksian1 [2.3K]
Y = x² + 7x - 4
y = -x - 4

x² + 7x - 4 = -x - 4
      + x       + x
x² + 8x - 4 = -4
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     x² + 8x = 0
x(x) + x(8) = 0
    x(x + 8) = 0
x = 0  or  x + 8 = 0
                   - 8  - 8
                     x = -8

      y = -x - 4
      y = -0 - 4
      y = 0 - 4
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(x, y) = (0, -4)
         or
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       y = 8 - 4
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The solutions are (0, -4) and (8, -4).
7 0
3 years ago
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