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kap26 [50]
3 years ago
11

How do you find the answer for f(5) when f(x)= -3x^4+7x^2-2

Mathematics
1 answer:
ololo11 [35]3 years ago
8 0
You find f(5) the same way you evaluate any function. Put the number where the variable is and do the arithmetic.

When high powers are involved, it can simplify the arithmetic a little to do some factoring:
.. f(x) = (-3x^2 +7)*x^2 -2
.. f(5) = (-3*25 +7)*25 -2 = -68*25 -2
.. f(5) = -1702
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Need some help with this question please
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Answer:

\frac{15}{17}

Step-by-step explanation:

  • \cos( \alpha )  =  \frac{ad}{hip}  \\  \\  \sin( \alpha )  =  \frac{op}{hip}

Pythagorean theorem

hip² = op² + ad²

17² = x² + 8²

x² = 17² - 8²

x \:  =  \sqrt{{17}^{2}  -  {8}^{2} }  \\ x =  \sqrt{289 - 64}  \\ x =  \sqrt{225}  \\ x = 15

\sin( \alpha )  =   - \frac{15}{17}

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Step-by-step explanation:

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A random sample of 23 items is drawn from a population whose standard deviation is unknown. The sample mean isx⎯ ⎯ x¯ = 840 and
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Answer:

(832.156, \ 847.844)

Step-by-step explanation:

Given data :

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$\overline x \pm t_{(n-1, \alpha /2)}. \frac{s}{\sqrt{n}}$

$E= t_{( n-1, \alpha/2 )} \frac{s}{\sqrt n}}

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$t_{(n-1, a\pha/2)}=t_{(22,0.01)} = 2.508$

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So, 98% CI is

$(\overline x - E, \overline x + E)$

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2 years ago
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