I NEED THIS ASAP PLS

Is 37 words per minute when typing an okay grade?

Olegator [25]

It is okay but you should be able to type up to 60+ words per minute and keep doing that to practice then if you can get into a typing class.

4 0

3 years ago

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What would you have to know about the pivot columns in an augmented matrix in order to know that the linear system is consistent

Scrat [10]

Answer:

The Rouché-Capelli Theorem. This theorem establishes a connection between how a linear system behaves and the ranks of its coefficient matrix (A) and its counterpart the augmented matrix.

$rank(A)=rank\left ( \left [ A|B \right ] \right )\:and\:n=rank(A)$

Then satisfying this theorem the system is consistent and has one single solution.

Explanation:

1) To answer that, you should have to know The Rouché-Capelli Theorem. This theorem establishes a connection between how a linear system behaves and the ranks of its coefficient matrix (A) and its counterpart the augmented matrix.

$rank(A)=rank\left ( \left [ A|B \right ] \right )\:and\:n=rank(A)$

$rank(A)$

Then the system is consistent and has a unique solution.

$\left\{\begin{matrix}x-3y-2z=6 \\ 2x-4y-3z=8 \\ -3x+6y+8z=-5 \end{matrix}\right.$

2) Writing it as Linear system

$A=\begin{pmatrix}1 & -3 &-2 \\ 2& -4 &-3 \\ -3 &6 &8 \end{pmatrix}$ $B=\begin{pmatrix}6\\ 8\\ 5\end{pmatrix}$

$rank(A) =\left(\begin{matrix}7 & 0 & 0 \\0 & 7 & 0 \\0 & 0 & 7\end{matrix}\right)=3$

3) The Rank (A) is 3 found through Gauss elimination

$(A|B)=\begin{pmatrix}1 & -3 &-2 &6 \\ 2& -4 &-3 &8 \\ -3&6 &8 &-5 \end{pmatrix}$

$rank(A|B)=\left(\begin{matrix}1 & -3 & -2 \\0 & 2 & 1 \\0 & 0 & \frac{7}{2}\end{matrix}\right)=3$

4) The rank of (A|B) is also equal to 3, found through Gauss elimination:

So this linear system is consistent and has a unique solution.

8 0

2 years ago

Anu wishes to prepare a program to display the value of numbers from 1 to 25. The program that Anu prepared is given below. Ther

sergiy2304 [10]

Answer:

Programming is a set of instructions i.e. Input given by the user to the computer to perform a particular task and give the desired result i.e. output.

Final Answer

‌s=0

for i in range(1,26):

s=s+ i

print(s)

Explanation:

IF THE ANSWER IS CORRECT THEN MARK A BRAINLEST

5 0

3 years ago

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Kelly is preparing for a speech that she will deliver in front of her language arts class. She wants to survey her classmates to

Hitman42 [59]

What is the speech on???

8 0

2 years ago

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Is there an ethically acceptable reason to study and use the various attack methods described in this chapter? Can you think of

avanturin [10]

Answer:

Please see below

Explanation:

Yes, there indeed is ethical justification for hacking certain computer systems. Since computer scientists are required to keep the system secure from external threats, so they make use of it when testing the network for potential loopholes that could make it vulnerable. It is beneficial in that it can help manifest the weaknesses present in the system, which can then be corrected for.

6 0

3 years ago