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qwelly [4]
3 years ago
8

Evaluate f(x)=1/4x for x = –5

Mathematics
2 answers:
Sav [38]3 years ago
8 0
F(-5)=1/(4*-5) --> -1/20
hoa [83]3 years ago
8 0

Answer: -0.25

Step-by-step explanation:

The given function : f(x)=\dfrac{1}{4}x

To find the value of the given function at -5, we need to substitute the value of -5 in the given function, we get

f(-5)=\dfrac{1}{4}\times-5\\\\\Riaghtarrow\ f(-5)=\dfrac{-5}{4}\\\\\Riaghtarrow\ f(-5)=-1\dfrac{1}{4}

Hence, the value of  f(x)=\dfrac{1}{4}x at x =-5=-1\dfrac{1}{4}\ or \ -0.25

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What is the standard error of a sampling distribution with a population standard deviation of 12 and the sample size of 81?
Marizza181 [45]

Answer: d. 1.3333

Step-by-step explanation:

We know that the standard error of a sampling distribution is given by :-

S.E.=\dfrac{\sigma}{\sqrt{n}}

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AS per given , we have

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Then, the standard error of a sampling distribution with a population standard deviation of 12 and the sample size of 81 will be :-

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6 0
3 years ago
14. f(x) = -x4 + x² + 4; x = -1
natali 33 [55]

Answer:

  f(-1) = 4

Step-by-step explanation:

See below for the synthetic division tableau. The remainder is 4, hence ...

  f(-1) = 4

___

IMO, in this function it is far easier just to substitute -1 for x. Since the only terms are of even degree, the value of f(-1) is the sum of the coefficients:

  f(-1) = -1 +1 +4

  f(-1) = 4

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