All categories

3 years ago

When did the silent movie era end? A.1919 B.1929 C.1939 D.1949

Computers and Technology

2 answers:

Tomtit [17]3 years ago

7 0

Pretty sure your answer is B. 1929

11111nata11111 [884]3 years ago

5 0

Answer:

The answer is 1929.

You might be interested in

Mention 3 components that can be found at the back and front of the system unit

Radda [10]

Answer:

Back

Power port, USB port, Game port

Front

Power button, USB port, Audio outlet

Explanation:

There are several components that can be found on the system unit.

In most (if not all) computer system units, you will find more component at the back side than the front side.

Some of the components that can be found at the back are:

Ports for peripherals such as the keyboard, mouse, monitor, USB ports, power port, etc.

Some of the components that can be found at the back are:

The power button, cd rom, audio usb ports, several audio outlets, video port, parallel ports, etc.

Note that there are more components on the system units. The listed ones are just a fraction of the whole components

3 0

2 years ago

Physical activity such as sports or even a brisk walk can help reduce

ycow [4]

Physical activity could help reduce the chance ofheart disease

4 0

2 years ago

Read 2 more answers

What percent of students in the US are considered ESL students?

mariarad [96]

Answer: 9.5%

Explanation: There were nearly 5 million English language learners in U.S. public schools in fall 2015, according to the most recent available data from the National Center for Education Statistics. This represented 9.5% of U.S. public school enrollees, an increase from 8.1% in 2000

5 0

2 years ago

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.

E.g.

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

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

In excel what is the biggest disadvantage of copying a worksheet into another workbook?

Mariana [72]

The answer might be wrong and you could get caught

7 0

2 years ago