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Pachacha [2.7K]
3 years ago
15

What is the inverse of f(x) =1/3 x + 2?

Mathematics
1 answer:
Luba_88 [7]3 years ago
3 0

Answer:

Step-by-step explanation:

To begin, we will replace f(x) with y, since they mean the same thing, except y does not represent function notation.  We will put it back when we're done.

y=\frac{1}{3}x+2

The rules for finding an inverse function algebraically is to switch the x and the y, then solve for the new y.  Our function then becomes, with the variables switched:

x=\frac{1}{3}y+2

Begin to isolate the new y by subtracting 2 from both sides:

x-2=\frac{1}{3}y

Now multiply both sides by 3:

3(x - 2) = y and

3x - 6 = y

That's the inverse, so now we will put it back into function notation:

f^{-1}(x)=3x-6

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Help meee please i need help
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Answer:

81pi

Step-by-step explanation:

You are asking yourself the area of pi*r^2 could with r as 9. pi*9^2. solve and you get 81pi :D

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1 year ago
Read 2 more answers
The average breaking strength of a certain brand of steel cable is 2000 pounds, with a standard deviation of 100 pounds. A sampl
Westkost [7]

Answer:

1963.2 pounds (lbs.)

Step-by-step explanation:

Things to understand before solving:

  • - <u>Normal Probability Distribution</u>
  1. The z-score formula can be used to solve normal distribution problems. In a set with mean ц and standard deviation б, the z-score of a measure X is given by: Z=\frac{X-u}{a}

The Z-score reflects how far the measure deviates from the mean. After determining the Z-score, we examine the z-score table to determine the p-value associated with this z-score. This p-value represents the likelihood that the measure's value is less than X, or the percentile of X. Subtracting 1 from the p-value yields the likelihood that the measure's value is larger than X.

  • - <u>Central Limit Theorem</u>
  1. The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean ц and standard deviation б , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean ц  and standard deviation s=\frac{a}{\sqrt{n} }

As long as n is more than 30, the Central Limit Theorem may be applied to a skewed variable. A specific kind of steel cable has an average breaking strength of 2000 pounds, with a standard variation of 100 pounds.

This means, ц  = 2000 and б = 100.

A random sample of 20 cables is chosen and tested.

This means that n = 20, s=\frac{100}{\sqrt{120} } =22.361

Determine the sample mean that will exclude the top 95 percent of all size 20 samples drawn from the population.

This is the 100-95th percentile, or X when Z has a p-value of 0.05, or X when Z = -1.645. So Z=\frac{X-u}{a}

  • By the Central Limit Theorem

Z=\frac{X-u}{a} \\-1.645=\frac{X-2000}{22.361} \\X-2000=-1.645*22.361

X =1963.2

<h3>Answer:</h3>

The sample mean that will cut off the top 95% of all size 20 samples obtained from the population is 1963.2 pounds.

3 0
2 years ago
What is the value of this expression?
mylen [45]

9514 1404 393

Answer:

  2

Step-by-step explanation:

I find it convenient to remember that a logarithm is an exponent.

  \log_a(a^b)=b

__

  log₂(8) +log₃(1/3) = log₂(2³) +log₃(3⁻¹)

  = 3 -1 = 2

The value of the expression is 2.

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Some calculators can compute this for you directly.

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24) You want to save $500 for a school trip. You begin by saving a penny on the first day. You plan to save an additional penny
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Step-by-step explanation:

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Write a whole number and a fraction greater than 1 to name the part filled.th
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5/10 of 5 your welcome
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