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3 years ago

Five numbers has a mean of 12. When one (1) number is removed the mean is 11. What is the value of the number removed?

Mathematics

1 answer:

bonufazy [111]3 years ago

6 0

Answer:

Step-by-step explanation:

The mean of a group of values is calculated as

mean = $\frac{sum}{count}$

Given 5 numbers with a mean of 12, then

$\frac{sum}{5}$ = 12 ( multiply both sides by 5 )

sum = 60

let the number removed be x , then

$\frac{60-x}{4}$ = 11 ( multiply both sides by 4 )

60 - x = 44 ( subtract 60 from both sides )

- x = - 16 ( multiply both sides by - 1 )

x = 16

The number removed was 16

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Plz explain.

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3 years ago

The data set shows the numbers of hours students study the week before a test. Find and interpret the mean absolute deviation of

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Step-by-step explanation:

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3 - 6.5 = 3.5

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5 - 6.5 = 1.5

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8 - 0.5 = 7.5

9 - 0.5 = 8.5

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Answer:

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Step-by-step explanation:

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3 years ago

Creative landscaping has 60 yards of fencing with which to enclose a rectangular flower garden. If the garden is X yards long, e

7nadin3 [17]

Answer:

$\texttt{Area = Length x Width}\\\\\texttt{Area =}x\times (30-x)=30x-x^2\\\\\texttt{Area =}30x-x^2$

<h3>Area, A(x) = 30x - x² , as a function of the length (x).</h3>

Step-by-step explanation:

Creative Landscaping has 60 yard of fencing with which to enclose a rectangular garden.

If the garden is X yards long, express the Gardens area as a function of length

Let x be the length of garden

So perimeter of rectangle = 60 yard

Perimeter = 2 * ( Length + width)

60 = 2 * ( x + width)

Width = 60/2 - x

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<h3>Area, A(x) = 30x - x² , as a function of the length (x).</h3>

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4 years ago

Which letter is the correct answer and why

Julli [10]

Answer:

<h2>Option C</h2>

Step-by-step explanation:

Here,

[Taking 'A' = 'a']

$a \: = \: 4\pi {r}^{2}$

Then for 'r',

$= > 4\pi {r}^{2} = a$

$= > {r}^{2} = \frac{a}{4\pi}$

$= > r = \sqrt{\frac{a}{4\pi} }$

$= > r = \frac{1}{2}\sqrt{ \frac{a}{\pi} }$

Hence,

Option C is correct .

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2 years ago