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garik1379 [7]
3 years ago
6

Determine the value of the following:

Mathematics
1 answer:
Airida [17]3 years ago
7 0

Answer:

C=\left[\begin{array}{cc}1&4\\1&6\end{array}\right]

Step-by-step explanation:

<u>Matrix Addition</u>

Given two matrices A and B, the sum of A+B can only be defined if both matrices are of the same order, i.e. they have the same number of files and columns. If that was the case, then the sum of A and B, call it C is defined as

c_{i,j}=a_{i,j}+b_{i,j}

In other words, the resulting sum at row i and column j is the sum of the elements in that exact position

We are given the matrices

\left[\begin{array}{cc}-2&3\\2&4\end{array}\right] +\left[\begin{array}{cc}3&1\\-1&2\end{array}\right]

Adding them at the same position, we have

C=\left[\begin{array}{cc}-2+1&3+1\\2-1&4+2\end{array}\right]

C=\left[\begin{array}{cc}1&4\\1&6\end{array}\right]

Select option c.

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Answer:

A is not true

Step-by-step explanation:

4 0
3 years ago
Please help!!
dexar [7]

Answer:C

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Ivan has 6 times as many blue beads as red beads. He has 49 red and blue beads in all. How many blue beads does Ivan have?
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Read 2 more answers
Divide a line of 1.8m into three parts in the ratio of 5:7:8​
kozerog [31]

Answer:

0.45 m, 0.63 m, 0.72 m

Step-by-step explanation:

Let the three parts of the line be 5x, 7x and 8x

Therefore,

5x + 7x + 8x = 1.8

20x = 1.8

x = 1.8/20

x = 0.09

5x = 5*0.09 = 0.45 m

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8 0
3 years ago
What are the ordered pairs of the
9966 [12]

Start by writing the system down, I will use y to represent f(x)

y=x^2-5x+3\wedge y=-3

Substitute the fact that y=-3 into the first equation to get,

-3=x^2-5x+3

Simplify into a quadratic form (ax^2+bx+c=0),

x^2-5x+6=0

Now you can use Vieta's rule which states that any quadratic equation can be written in the following form,

x^2+x(m+n)+mn=0

which then must factor into

(x+m)(x+n)=0

And the solutions will be m,n.

Clearly for small coefficients like ours 5,6, this is very easy to figure out. To get 5 and 6 we simply say that m=3, n=2.

This fits the definition as 5=3+2 and 6=2\cdot3.

So as mentioned, solutions will equal to m=3, n=2 but these are just x-values in the solution pairs of a form (x,y).

To get y-values we must substitute 3 for x in the original equation and then also 2 for x in the original equation. Luckily we already know that substituting either of the two numbers yields a zero.

So the solution pairs are (2,0) and (3,0).

Hope this helps :)

5 0
3 years ago
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