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sesenic [268]
3 years ago
12

Given f(x)=3x-1 find f(-1)

Mathematics
1 answer:
vaieri [72.5K]3 years ago
7 0

Answer:

<h2>f( - 1) = - 4</h2>

Step-by-step explanation:

f(x) = 3x - 1

To find f(-1) substitute the value of x that's

- 1 into f(x). That's for every x in f(x) replace it with - 1 and solve

That's

f( - 1) = 3(-1) - 1

= - 3 - 1

We have the final answer as

<h3>f(-1) = - 4</h3>

Hope this helps you

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The answer is:
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Answer:

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Step-by-step explanation:

A) p ( proportion of population that spends more than $100 per week) = 0.17

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the sample proportion of p = 0.17

standard error of p = \sqrt{\frac{p(1-p)}{n} } = 0.013281

the sampling distribution of p can be calculated/approximated with

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B) probability that the sample proportion will be +-0.02 of the population proportion

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z value corresponding to P

Z = \frac{P - p}{standard deviation}

at P = 0.15

Z =  (0.15 - 0.17) / 0.013281 = = -1.51

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therefore the required probability will be

p( -1.5 ≤ z ≤ 1.5 ) = p(z ≤ 1.51 ) - p(z ≤ -1.51 )

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C) for a sample (n ) = 1600

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therefore the required probability after applying

z = \frac{P-p}{standard deviation} at p = 0.15 and p = 0.19

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