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Anastasy [175]
3 years ago
10

Given that f(x) = x + 4x evaluate f(-2).

Mathematics
1 answer:
Makovka662 [10]3 years ago
4 0
The answer is -10 because when u plug in -2 for x u get 4(-2)=-8 then -2+-8=-10
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20×^2-30x-40 solve for x
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Answer:

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Step-by-step explanation:

Solve for x:

360 - 30 x = 0

Subtract 360 from both sides:

(360 - 360) - 30 x = -360

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Divide both sides of -30 x = -360 by -30:

(-30 x)/(-30) = (-360)/(-30)

(-30)/(-30) = 1:

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The gcd of 360 and -30 is 30, so (-360)/(-30) = (-(30×12))/(30 (-1)) = 30/30×(-12)/(-1) = (-12)/(-1):

x = (-12)/(-1)

(-12)/(-1) = (-1)/(-1)×12 = 12:

Answer:  x = 12

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