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nasty-shy [4]
4 years ago
5

There are 20 children at a library. Six of the children have an average age of 5 years. The remaining children have an average a

ge of 8 years. What is the average age of the children at the library? Enter your answer in the box. WILL GIVE BARINLIYEST
Mathematics
1 answer:
Allushta [10]4 years ago
7 0
Answer: The average age is 7.1 years.

This problem is an example of when we need to take a weighted average. We simply can't just find the average of 5 and 8, because there are different children of each each.

To start, lets multiply the total number of children by their individual ages.

6 x 5 = 30 years
14 x 8 = 112 years

There are 142 years among the 20 years, so divide 142 by 20. This gives us an average age of 7.1 years.
You might be interested in
The length of a rectangle is 6ft longer than its with. If the perimeter is 44 what is the area
ikadub [295]

Answer:

Area= L*W= 13*7 = 91ft^2

Step-by-step explanation:

L= 6+W

Perimeter of the rectangle=2(L+W)=40

2(6+W+W)=40

2(6+2W)=40

12+4W=40

4W=40-12

4W=28

W=28/4

W=7ft

L=6+7=13ft

Area=L*W=13*7=91ft^2

7 0
4 years ago
Please helpp meeeee with a right answer
ikadub [295]

Answer:

dude your screwed bro have fun working at mcdonalds

Step-by-step explanation:

3 0
3 years ago
consider the polynomial 2/3x (2x-3) - (x-7) (x+7) when simplified, what is the coefficent of the quadratic term?
Svet_ta [14]

Answer:

x^2 - 6x + 147 so the coefficient is 1

Step-by-step explanation:

First, simplify the equation.

1. 2/3x(2x-3) = (2x/3)(2x-3)-(x-7)(x+7)

2. 2x-3(2x/3) = (2x(2x-3)) - (x-7)(x+7)

3. Expand -(x-7)(x+7) = -x^2+49

Combine to get (x^2 - 6x)/3 +49

Simplify to get x^2 - 6x + 147. The coefficient of the quadratic term is one.

4 0
3 years ago
Question
Alik [6]

Here, we are required to find the equation, in terms of w, that could be used to find the dimensions of the storage unit in feet.

The polynomial is;. 3w³ + 22w + 24w = 5440ft³.

From the question;

  • <em>Let the width = w</em>
  • <em>length,</em><em> </em><em>l</em><em> = 3w + 4</em>
  • <em>height,</em><em> </em><em>h</em><em> = w + 6</em>

<em>The </em><em>volume </em><em>of </em><em>a </em><em>rectangular</em><em> </em><em>prism </em><em>is </em><em>given </em><em>by </em><em>the </em><em>product </em><em>of </em><em>its </em><em>length,</em><em> </em><em>width </em><em>and </em><em>height.</em><em> </em><em>Thus</em><em>;</em>

Volume = l × w × h

Therefore, Volume, V = (3w +4) × w × (w +6)

To obtain the required polynomial, we expand the expression for Volume above;

<em>V = (3w² + 4w) × (w + 6)</em>

<em>V = (3w² + 4w) × (w + 6)V = 3w³ + 22w² + 24w.</em>

However, the volume of the rectangular prism has been given to be 5440 cubic feet.

Therefore, the polynomial is;

3w³ + 22w + 24w = 5440ft³.

Read more:

brainly.com/question/9740998

8 0
2 years ago
Read 2 more answers
Find the slope between each pair of points in the graph below for question
kirill115 [55]
5) A (1,2) B (2,4)


slope. (1-2)=2-4


slope. -1= -2


slope = 2


6) D (-5,1) E ( -2,0)


slope. (-5-(-2))=1-0


slope. (-5+2)=1


slope. -3=1


slope = -1/3


7) C (-3,4) E (-2,0)


slope. (-3-(-2))=4-0


slope. (-3+2)=4


slope. -1=4


slope = -4


8) D (-5,1) B (2,4)


slope. (-5-2)=1-4


slope. (-7)= -3


slope = 3/7
3 0
3 years ago
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