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Marianna [84]
3 years ago
14

If f(7)=22, then f^-1(f(7))=? Please help!!

Mathematics
1 answer:
alexira [117]3 years ago
7 0

Answer:

  7

Step-by-step explanation:

In general, the point of an inverse function is to show you the value that gives a particular function value. That is, ...

  f^{-1}(22)=7\\\\f^{-1}(f(x))=x\\\\f^{-1}(f(7))=7

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FIVE STARS AND BRAINLIEST FOR CORRECT ANSWER
Charra [1.4K]

For the given vectors \vec{a}=a_{1}\hat{i}+a_{2}\hat{j} and \vec{b}=b_{1}\hat{i}+b_{2}\hat{j}

The dot product of vectors a and b is defined as = \vec{a}.\vec{b}=(a_{1}\times b_{1}+a_{2} \times b_{2})

So, \vec{a}.\vec{b} = (4\hat{i}+3\hat{j}). (-4\hat{i}+4\hat{j})

\vec{a}.\vec{b}=(4\times(-4)+3 \times4)

= -16+12

= -4

8 0
3 years ago
In a randomly selected sample of 100 students at a University, 81 of them had access to a computer at home. Give the value of th
astra-53 [7]

Answer:

The value of the standard error for the point estimate is of 0.0392.

Step-by-step explanation:

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean \mu = p and standard deviation s = \sqrt{\frac{p(1-p)}{n}}

In a randomly selected sample of 100 students at a University, 81 of them had access to a computer at home.

This means that n = 100, p = \frac{81}{100} = 0.81

Give the value of the standard error for the point estimate.

This is s. So

s = \sqrt{\frac{0.81*0.19}{100}} = 0.0392

The value of the standard error for the point estimate is of 0.0392.

7 0
3 years ago
Two sides of a triangle are 5 and 10. Which is a<br> possible length for the third side?
Sever21 [200]

Answer:

4

Step-by-step explanation:

5 0
3 years ago
Please help ‼️‼️<br> i’ll give the brainliest thing if it’s correct
Rama09 [41]
This would be 85 use the percent in division
6 0
2 years ago
Divide the number 480 in a ratio of 3:5
Schach [20]

If it is a ratio of 3:5 you are dividing 480 into 8 parts (3+5).


So divide 480 by 8: 480/8 = 60


Then the ratio is (3x60):(5x60) or 180:300


To check it is correct, add up the two parts to see that they come to 480:


180+300 = 480. All good.


Hope this helps


6 0
4 years ago
Read 2 more answers
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