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3 years ago

F(x)=3x-2 what is the function for f(3)

Mathematics

1 answer:

Vlad1618 [11]3 years ago

6 0

F(x) = 3x - 2
f(3) = 3(3) - 2
f(3) = 9 - 2
f(3) = 7

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erma4kov [3.2K]

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3 years ago

how to transform the quantity of the sixth root of x to the fifth power, to the seventh power into an expression with a rational

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4 years ago

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Answer:

78°

Step-by-step explanation:

The angular distance of an arc is twice the angle that forms it if that angle lies of the edge of the circle.

By this, Arc AK has angular distance 158°.

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4 years ago

The speeds of vehicles traveling on a highway are normally distributed with a population standard deviation of 7 miles per hour

True [87]

Answer: $(56.03\ ,63.97)$

Step-by-step explanation:

Given : The speeds of vehicles traveling on a highway are normally distributed .

Standard deviation: $\sigma: 7$

Since , sample size : $n=20$ , which is small sample (n<30) so the test applied here is a t-test.

Degree of freedom= $n-1=20-1=19$

Sample mean : $\overline{x}=60$

Level of significance : $1-\alpha:0.98$

Then , significance level : $\alpha: 1-0.98=0.02$

Using t-distribution table , Critical value : $\text{t-score}=t_{n-1, \alpha/2}= 2.539483$

The confidence interval for population mean is given by :-

$\overline{x}\pm t_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

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Hence, a 98% confidence interval for the population mean= $(56.03\ ,63.97)$

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3 years ago

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4 years ago

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