kariyaclark12 kariyaclark12
  • 14-07-2017
  • Mathematics
contestada

Use the quadratic model y = −4x2 − 3x + 4 to predict y if x equals 5.

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wikk
wikk wikk
  • 14-07-2017
y = -4x^2 - 3x + 4
x = 5

y = -4(5)^2 - 3(5) + 4

y = -4(25) - 15 + 4

y = -100 - 15 + 4

y = -114
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altavistard
altavistard altavistard
  • 14-07-2017
Please, write -4x^2 (not 04x2).
Then the quadratic model is y = -4x^2 - 3x + 4.
Now substitutet 5 for x:  y(5) = -4 (5)^2 - 3(5) + 4
Simplifying,                     y(5) = -4(25) - 15 + 4 = -100 - 11 = -111.
Answer Link

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