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Elza [17]
2 years ago
7

It is about Name the property of the rational numbers in each of the following

Mathematics
1 answer:
Diano4ka-milaya [45]2 years ago
5 0

The property of each given rational number operation are respectively; Commutative Property; Closure Property; Associative Property; Closure Property; Distributive Property

<h3>What is the property of the rational number?</h3>

The main properties of rational numbers are:

  • Commutative property.
  • Associative Property.
  • Distributive Property.
  • Closure property.

a) The property used here is commutative property which says that;

a + b = b + a.

This tallies with the operation used on the rational numbers.

b) The property used here is called Closure Property. This is because for two rational numbers say a and b, the results of addition, subtraction and multiplication operations gives a rational number.

c) The property used here is called associative property because it states that; a * (b * c) = (a * b) * c.

d) The property used here is called Closure Property. This is because for two rational numbers say a and b, the results of addition, subtraction and multiplication operations gives a rational number.

e)  The property used here is called distributive property because it states that; a * (b * c) = (ab * ac)

Read more about Properties of rational numbers at; brainly.com/question/12088221

#SPJ1

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The height of the building is calculated by representing 1 inch as 8 feet. The final building has a height of 20 feet.

<h3>What is scaling?</h3>

Scaling is the increase or decrease in the height of an object by a scale factor k.

Given that the scale used is:

1 inch = 8 feet. Hence:

Since the height of the building is 2.5 in, hence:

Height of the final building = 2.5 in * 8 ft per 1 in = 20 feet

The height of the final building is 20 feet.

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7 0
2 years ago
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Mi padre compró un radio por cierta suma de dinero, un televisor que costó 10 veces más que el radio y un reproductor cuyo preci
Maru [420]

Answer:

For radio = $40.43

Television =  $444.73

Player =  $364.73

Step-by-step explanation:

The computation of the each device cost is shown below:

let us assume the following things

radio be x

television x + 10x

player x + 10x - $80

Now the equation is

x + x + 10x + x + 10x - $80 = $850

3x + 20x - $80 = $850

23x = $930

x = $40.43

For radio = $40.43

Television = $40.43 + 10(40.43)

= $40.43 + $404.3

= $444.73

and, the player would be

= $444.73 - $80

= $364.73

7 0
3 years ago
Kayla brought 80 packs of cat food to feed the cats outside.
Akimi4 [234]

Answer:

It's 24 packs of cat food

Step-by-step explanation:

You have to think of it as 30% of 80.

30      ?

----- = ----

100    80

Now you have to find out what is in the blank by doing 80 times 30 to find what that equals. That equals 2,400. Now you have to find what times a 100 gets you 2,400. You divide a 100 by 2,400 to get 24. There's your answer

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An athletic coach conducted an experiment to test whether a four-week stretching and flexibility program reduces the number of m
nirvana33 [79]

Answer: This study uses a control group, this study uses repeated measures design, and this study uses random sampling

Step-by-step explanation:

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Frequent food questionnaires (FFQ) are a simple way to obtain information on the foods individuals consume by asking them questi
Ilia_Sergeevich [38]

Answer:

Asnwer is A

Step-by-step explanation:

since the correlation between the FFQ and DR is 0.89

      x                            y               xy                    x^{2}                            y^{2}

    8.26                      1.68          13.8768          68. 2276          2.8224

     0.83                      0               0                    06889                  0

     20.13                   15.1           303.963          405.2169          228.01

      11.16                   7.49          83.5884          124.5456           56.1001

      7.18                    12.84         92.1912            51.5524            164.8656

       1.76                       0                0                   3.0976                 0

     22.46                  25.06        567.8596        513.4756           628.0036

-----------------------------------------------------------------------------------------------------------

       ∑x_{i} =                 ∑y_{i} =              ∑x_{i} y_{i}=               ∑x_{i}^{2} y_{i}^{2}=             ∑y_{i} ^{2}=      

      71.98                   62.17         1061.479            1166.8046      1079.8017  

-------------------------------------------------------------------------------------------------------------

Correlation Coefficient or Pearson Correlation is given by:  

the rest calculation is in the attached image

3 0
4 years ago
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