Please tell me an easy way to do dialtions.

Mathematics

1 answer:

adoni [48]3 years ago

3 0

Answer:

How did society originate

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The Department of Motor Vehicles reports that 32% of all vehicles registered in a state are made by a Japanese or a European aut

Mandarinka [93]

Answer: C. a parameter.

Step-by-step explanation:

In statistics, a parameter is a measure ( such as population mean , population proportion... ) generated from the entire population .
A statistics is also a measure( such as sample mean , sample standard deviation , sample proportion,..) but generated from the sample taken from population.

Given : The Department of Motor Vehicles reports that 32% of all vehicles registered in a state are made by a Japanese or a European automaker.

Here, Department as considered the entire population of vehicles registered in a state are made by a Japanese or a European automaker to find the proportion.

Thus , 32% = Population proportion of vehicles registered in a state are made by a Japanese or a European automaker

So , The number 32% is best described as <u>a parameter</u>.

Hence, the correct answer is C. a parameter.

8 0

3 years ago

Match the one-to-one functions with their inverse functions.

Nady [450]

The inverse of a function is obtained by making x the subject of the formular of the function.

Given the function
$f(x)= \frac{x}{8} -7$
the inverse of the function is obtained as follows:
$y= \frac{x}{8} -7 \\ \\ y+7=\frac{x}{8} \\ \\ x=8(y+7) \\ \\ \bold{f^{-1}(x)=8(x+7)}$

Given the function
[tex[f(x)=x+7[/tex]
the inverse of the function is obtained as follows:
$y=x+7 \\ \\ x=y-7 \\ \\ \bold{f^{-1}(x)=x-7}$

Given the function
$f(x)=1- \frac{x}{3}$
the inverse of the function is obtained as follows:
$y=1- \frac{x}{3} \\ \\ -\frac{x}{3} =y-1 \\ \\ x=-3(y-1) \\ \\ \bold{f^{-1}(x)=-3(x-1)}$

Given the function
$f(x)=20-0.25x$
the inverse of the function is obtained as follows:
$y=20-0.25x=20- \frac{1}{4} x \\ \\ \frac{1}{4} x=20-y \\ \\ x=4(20-y) \\ \\ \bold{f^{-1}(x)=4(20-x)}$