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Pavlova-9 [17]
4 years ago
10

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

Mathematics
2 answers:
kenny6666 [7]4 years ago
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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Step-by-step explanation:

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4 years ago
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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

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P=2(x+y)

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we have

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simplify

200=x+y

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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

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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

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x=100\ ft

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equation A

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