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4 years ago

PLEASE PLEASE HELP I WILL MARK THE BRAINLIEST!!!!!

2 answers:

3 0

Hi!

There is no way to tell what the means are.

To find the mean of a data set, you need to know how many numbers are in it, and what they all are. We don't know either of these. Therefore, D is your answer.

Hope this helps! :)
-Peredhel

Readme [11.4K]4 years ago

3 0

Answer:

The answer to this question is option: D

Step-by-step explanation:

The mean of two numbers could not be calculated with the help of the information and data provided in the question because:

For the calculation of means we must know that how many entries are there in the given data. since the mean of a data is defined as the average of all the entries.

i.e.

Mean= (sum of all the entries)/(total number of entries)

Hence, Option D is correct i.e. " There is no way to tell what the means are" .

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Rudik [331]

Answer:

The answer is 54.896N

Step-by-step explanation:

From Hooke's law,

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5 0

4 years ago

Read 2 more answers

What are the dimensions of a rectangular wall that can be constructed with 400 feet of brick that will maximize the area enclose

ollegr [7]

Answer:

The dimensions of the wall are 100 ft x 100 ft

Step-by-step explanation:

we know that

The perimeter of a rectangular wall is

$P=2(x+y)$

where

x is the length

y is the width

we have

$P=400\ ft$

$400=2(x+y)$

simplify

$200=x+y$

$y=200-x$ ----> equation A

The area of a rectangular wall is equal to

$A=xy$ ----> equation B

substitute equation A in equation B

$A=x(200-x)\\A=-x^2+200x$

This is the equation of a vertical parabola open downward (because the leading coefficient is negative)

The vertex represent a maximum

Convert the quadratic equation in vertex form

$A=-x^2+200x$

Factor -1

$A=-(x^2-200x)$

Complete the square

$A=-(x^2-200x+100^2)+100^2$

$A=-(x^2-200x+10,000)+10,000$

Rewrite as perfect squares

$A=-(x-100)^2+10,000$ ----> equation in vertex form

The vertex is the point (100,10,000)

The x-coordinate of the vertex represent the length of the wall for a maximum area

$x=100\ ft$

Find the value of y

equation A

$y=200-(100)=100\ ft$

therefore

The dimensions of the wall are 100 ft x 100 ft

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Answer:

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Step-by-step explanation:

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Answer:

Step-by-step explanation:

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