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3 years ago

I really need help with this question

Computers and Technology

1 answer:

zhuklara [117]3 years ago

3 0

teleconferencing is like zoom or skype you can be in a call with facetime.

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Two machines can finish a job in StartFraction 20 Over 9 EndFraction hours. Working alone, one machine would take one hour long

Alborosie

Answer

5 hours

Explanation

The two working together can finish a job in

$\frac{20}{9} \: hours$

Also, working alone, one machine would take one hour longer than the other to complete the same job.

Let the slower machine working alone take x hours. Then the faster machine takes x-1 hours to complete the same task working alone.

Their combined rate in terms of x is

$\frac{1}{x} + \frac{1}{x - 1}$

This should be equal to 20/9 hours.

$\frac{1}{x} + \frac{1}{x - 1} = \frac{9}{20}$

Multiply through by;

$20x(x - 1) \times \frac{1}{x} +20x(x - 1) \times \frac{1}{x - 1} = 20x(x - 1) \times \frac{9}{0}$

$20(x - 1) +20x = 9x(x - 1)$

$20x - 20+20x = 9{x}^{2} - 9x$

$9{x}^{2} - 9x - 20x - 20x + 20= 0$

$9{x}^{2} - 49x + 20= 0$

Factor to get:

$(9x - 4)(x - 5) = 0$

$x = \frac{4}{9} \: or \: x = 5$

It is not feasible for the slower machine to complete the work alone in 4/9 hours if the two will finish in 20/9 hours.

Therefore the slower finish in 5 hours.

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2 years ago

What command utilizes the limpel-ziv (lz77) compression algorithm and achieves a compression ratio of 60-70 percent?

AURORKA [14]

The limpel-ziv (lz77) compression technique is used by the GNU zip (gzip) tool to produce a compression ratio of 60–70%.

<h3>How do methods for data compression function? Describe the LZW algorithm.</h3>

Compression methods lower the amount of memory needed to hold pictures and the number of bytes needed to represent data. Compression improves the amount of data that can be delivered over the internet and enables the storage of more photos on a given media.

Abraham Lempel, Jacob Ziv, and Terry Welch developed the table-based lookup technique known as LZW compression to compress a file into a smaller file. The TIFF image format and the GIF image format are two frequently used file formats that employ LZW compression.

To know more about limpel-ziv (lz77) compression algorithm, Visit:

brainly.com/question/19878993

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1 year ago

To create a multiple-table form based on the âmanyâ table, tap or click the ____ button on the create tab to create a form in la

Archy [21]

Click on the blank form button.

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3 years ago

You’re mapping out the logical relations of a database, and you notice that one of your tables will have a pair of child records

Jet001 [13]

The answer to your question is answer A

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3 years ago

Given a sorted array of integers created on the heap, its size and a new integer, design a function which will enlarge the array

Debora [2.8K]

Using the computational language in C++ to write a code that will organize the values in an array through a mathematical condition.

<h3>writing code in C++</h3>

#include <bits/stdc++.h>

using namespace std;

int getIndexInSortedArray(int arr[], int n, int idx)

{

/* Count of elements smaller than current

element plus the equal element occurring

before given index*/

int result = 0;

for (int i = 0; i < n; i++) {

if (arr[i] < arr[idx])

result++;

if (arr[i] == arr[idx] && i < idx)

result++;

}

return result;

}

int main()

{

int arr[] = { 3, 4, 3, 5, 2, 3, 4, 3, 1, 5 };

int n = sizeof(arr) / sizeof(arr[0]);

int idxOfEle = 5;

cout << getIndexInSortedArray(arr, n, idxOfEle);

return 0;

}

See more about C++ at brainly.com/question/12975450

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2 years ago