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iogann1982 [59]

2 years ago

6

On a math test the mean score is 82 with a standard deviation of 3. A passing score is 70 or greater. Choose a passing score tha

t you would consider to be the outlier.

1 answer:

8090 [49]2 years ago

4 0

82... goes up by 3. so 85... not quite sure if that's the answer to what you are asking.. is your question completely written out? lol

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Likurg_2 [28]

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Step-by-step explanation:

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2 years ago

Read 2 more answers

When a number is decreased by 4%, the result is 93. What is the original number

romanna [79]

Answer:

<u>The original number is 96.875</u>

Step-by-step explanation:

Let's find the original number using the Direct Rule of Three, this way:

Percentage Number

100 x

96 93

***********************************************

96x = 93 * 100

96x = 9,300

x = 9,300/96

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7 0

3 years ago

Define a function f on a set of real numbers as follows: f(x) = 3x − 1 x , for each real number x ≠ 0 Prove that f is one-to-one

dalvyx [7]

Answer with Step-by-step explanation:

We are given that

$f(x)=\frac{3x-1}{x}$

For each real number $x\neq 0$

To prove that f is one -to-one.

Proof:Let $x_1$ and $x_2$ be any nonzero real numbers such that

$f(x_1)=f(x_2)$

By using the definition of f to rewrite the left hand side of this equation

$f(x_1)=\frac{3x_1-1}{x_1}$

Then, by using the definition of f to rewrite the right hand side of this equation of $f(x_1)=f(x_2)$

$f(x_2)=\frac{3x_2-1}{x_2}$

Equating the expression then we get

$\frac{3x_1-1}{x_1}=\frac{3x_2-1}{x_2}$

$3x_1x_2-x_2=3x_2x_1-x_1$

$3x_1x_2-3x_1x_2+x_1=x_2$

$x_1=x_2$

Therefore, f is one-to-one.

6 0

2 years ago