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3 years ago

What is f(3) if f(x) = - 4x + 1 ?

Mathematics

2 answers:

vampirchik [111]3 years ago

5 0

Answer:

Here is the equation:

f(r)=4r+1

You need to find f(3). To do that, substitute all the x's with 3:

f(r)=4r+1->f(3)=4x3+1

The first thing you need to do is multiply 4 by 3. Multiply:

4x3=12

Here is your new equation:

f(3)=12+1

To get your answer, you need to add 12 and 1. Add:

12+1=13

That means:

f(3)=13

If you have any questions, feel free to ask in the comments! :)

Step-by-step explanation:

slavikrds [6]3 years ago

3 0

Answer is -11. use the given functions to set up & simplify f(3)

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Alternative hypothesis: $\sigma \neq 0.2$ (Changes on the deviation)

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s represent the sample standard deviation

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$\sigma_o =0.2$ represent the value that we want to test

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A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".

The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".

The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".

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Alternative hypothesis: $\sigma \neq 0.2$ (Changes on the deviation)

In order to test these system of hypothesis we need to select a significance level $\alpha$ , then we need to calculate an statistic given by this formula.