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goblinko [34]
1 year ago
12

How are the entries of the matrix named by position?

Mathematics
1 answer:
4vir4ik [10]1 year ago
7 0

Matrix are used to represent numbers in rows and columns.

The position of the matrix elements are:

  • \mathbf{7 \to a_{21}}
  • \mathbf{-5 \to a_{34}}
  • \mathbf{-1 \to a_{12} }

Matrix elements are named using the row and column, the element belongs to.

For instance:

The name of an element in the third row and fifth column of a matrix b is \mathbf{ b_{35}}

Using the above explanation, the name of 7, -5 and -1 is as follows;

7 belongs to row 2 and column 1

So, the name is: \mathbf{ a_{21}}

\mathbf{7 \to a_{21}}

-5 belongs to row 3 and column 4

So, the name is: \mathbf{ a_{34}}

\mathbf{-5 \to a_{34}}

-1 belongs to row 1 and column 2

So, the name is: \mathbf{ a_{12}}

\mathbf{-1 \to a_{12} }

Read more about position of matrix at:

brainly.com/question/17409182

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Angle c is inscribed in circle O. AB is a diameter of circle O. what is the radius of circle.​
Llana [10]

Answer:

The value of radius is 7.5 units

Step-by-step explanation:

Given that a line that pass through the origin and form a triangle is a right-angle triangle. So in order to find the diameter/hypotenuse, you have to use Pythogaras Theorem :

{c}^{2}  =  {a}^{2}  +  {b}^{2}

Let a = 12 units,

Let b = 9 units,

Let c = hypo.,

{hypo.}^{2}  =  {12}^{2}  +  {9}^{2}

{hypo.}^{2}  = 225

hypo. =  \sqrt{225}

hypo. = 15 \:  \: units

We have found out that the hypotenuse of the triangle is the diameter of circle. So in order to find radius, you have to divide it by 2 :

radius = diameter \div 2

radius = 15 \div 2

radius = 7.5 \:  \: units

6 0
3 years ago
Ms. Wall will roll a single number cubes. What is the probability that she will roll an even number?
Arturiano [62]
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4 0
3 years ago
A researcher gathered data on hours of video games played by school-aged children and young adults. She collected the following
antiseptic1488 [7]

Step-by-step explanation:

The complete frequency distribution table for the data has been attached to this response.

The frequency column contains values that are the number of times the given range of hours appear in the data. For example, numbers in the range 0 - 2 hours, appear <em>9</em> times in the data. Also, the numbers in the range 3 - 5 appear  <em>6</em> times. The same logic applies to other ranges.

The relative frequency column contains the ratio of the number of times the given range of hours appear in the data, to the total number of outcomes. The total number of outcomes is the sum of all the frequencies on the frequency column. This gives 38 as shown.

So, for example, to get the relative for the numbers in the range 0-2, divide their frequency (9) by the total outcome or frequency (38). i.e

9 / 38 = 0.24

Also, to get the relative for the numbers in the range 3-5, divide their frequency (6) by the total outcome or frequency (38). i.e

6 / 38 = 0.16

Do the same for the other ranges.

5 0
3 years ago
Plz simplify this expression:<br><br> 5x(x-4)
Bas_tet [7]
Hello! You can answer this question by using the distributive property. Basically

a(b+c) = a(b) + a(c)

Let's apply it to this expression:

5x(x-4)
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8 0
2 years ago
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iren2701 [21]
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