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3 years ago

Write the expression seven less than n

Mathematics

1 answer:

melamori03 [73]3 years ago

6 0

Answer:

$n-7$

Step-by-step explanation:

If the expression is 'seven less than n', we are subtracting 'seven' from 'n'.

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klemol [59]

The first equation

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Second equation

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2 years ago

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On a test that has a normal distribution, a score of 60 falls two standard deviations above the mean, and a score of 42 falls on

Sergeu [11.5K]

Answer:

Step-by-step explanation:

Given that:

$A \ score \ of \ 60 \ falls \ two \ standard \ deviations \ above \ the \ mean \\ \\ A \ score \ of \ 42 \ falls \ one \ standard \ deviation \ below \ the \ m ean$

The interval for score = 60 - 42 = 18

If we divide it by the 3 standard deviations; the interval result into

= 18/3

= 6

So, the standard deviation is 6, and the mean = 42 + 6

= 48

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2 years ago

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The average score of this quiz is 24 points with a standard deviation of 1.5 points. What is the probability that someone scored

navik [9.2K]

Answer:

8.08 %

Step-by-step explanation:

Let us denote : $X=$ score X follows a normal distribution with mean $=24$ and standard deviation $=1.5$

Step 2

The probability that someone scored 21.9 or less is :

$\mathrm{P}(\mathrm{X} \leq 21.9)$

$=\mathrm{P}\left(\mathrm{Z} \leq \frac{21.9-24}{1.5}\right)$

$=\mathrm{P}(\mathrm{Z} \leq-1.4)$

$=0.0808$

$=8.08%$

Answer : $8.08 %$

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2 years ago

12 and 13? I need help please!

ludmilkaskok [199]

I think 12 might be the second one, I'm not sure though!

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3 years ago

What is 1/3 divided by 4

Gwar [14]

Answer:

1/12

Step-by-step explanation:

1/3 times 1/4 is 1/12

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2 years ago

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