# Homework Help: Computers: Operating Systems

## Recent Homework Questions About Operating Systems

**science**

I'm stuck on the following questions 1)The geocentric model of the universe states that the Earth is the center of the universe. This is an example of a A)scientific conclusion B)pseudoscience C)scientific law*** D)Scientific method Through process of elimination i know its ...

**precalculus**

When using Gaussian elimination to solve a system of linear equations, explain how you can recognize that the system has no solution.

**precalculus**

When using Gaussian elimination to solve a system of linear equations, explain how you can recognize that the system has no solution. Give an example that illustrates your answer.

**precalculus**

Can you check my answer? If it is wrong can you please explain why and give the correct answer? Use Gaussian elimination to write the system of equations given below in row-echelon form. 2x+4y+z=-4 2x-4y+6z=13 4x-2y+z=6 answer:2x+4y+z=-4 8y-5z=-17 z=1

**precalculus**

please check my answers 1.Use Gaussian elimination to write the system of equations given below in row-echelon form. 2x+4y+z=-4 2x-4y+6z=13 4x-2y+z=6 answer:2x+4y+z=-4 8y-5z=-17 z=1 2.Find the solution to the system of equations given below. x+y+z=2 -x+3y+2z=8 4x+y=4 answer: 0...

**pre calculus**

Use Gaussian elimination to write the system of equations given below in row-echelon form. 2x+4y+z=-4 2x-4y+6z=13 4x-2y+z=6

**Algebra**

A grocery store makes a 20-pound mixture of almonds and cashew nuts. The store charges $4 per pound for almonds and $5.50 per pound for cashews. The total value of the mixture is $92. Write a system to find how many pounds of each type of nut are in the mixture.

**Science**

The lung is to the respiratory system as the ____ is to the integumentary system. A) heart B) kidney C)hand D)brain B

**precalculus**

write the system of equations in row-echelon form 2x+4y+z=-4 2x-4y+6z=13 4x-2y+z=6

**precalculus**

how do you determine when a system of equations is written in row-echelon form?

**object oriented programming**

Letâ€™s consider there will be 5 delicious food available at your new restaurant which will open by the end of 2016. To make the cashier's job easier, build a C++ console application to automate the process of billing on a daily basis. Specifically, the billing system must...

**Social Studies**

Which of the following statements best summarizes the system of railroads shown on the map? A. The majority of the railroads that connected the North to the South were built by 1850. B. The railroads established by 1860 each began and ended at a major American city or port. C...

**pre calculus**

Use Gaussian elimination to write the system of equations given below in row-echelon form 2x+4y+z=-4 2x-4y+6z=13 4x-2y+z=6

**Physics**

Could someone please help walk me through this problem I'm struggling with? Thanks in advance! A brick with mass m1=2.5 kg can move without friction on a horizontal plane. The brick is attached to a wall by an ideal spring with spring constant k=2300 N/m. A second brick with ...

**Physics**

Hi, I've been having trouble with this physics problem. I'm not sure where to begin. A brick with mass m1=2.5 kg can move without friction on a horizontal plane. The brick is attached to a wall by an ideal spring with spring constant k=2300 N/m. A second brick with mass m2=1.2...

**pre calculus**

Create systems of equations in two variables that have (a) no solution, (b) one distinct solution, and (c) infinite solutions. Show that each system has the indicated number of solutions by using a graph or solving the system.

**precalculus**

Which of the following shows an inconsistent system of equations? ________________________________________ 4x - 2y = 10 ; y = 2x - 5 3x + 2y = 1 ; 2x - 3y = 1 2x + y = 2 ; y = -2x - 2 3x + 4y = 5 ; 6x + 8y = 10 Is 4x-2y=10 y=2x-5 the correct answer?

**precalculs**

how do you find all the solutions to the system of equations .2x^2-2x-y=14 .2x-y=-2

**precalculus**

how do you find all the solutions to the system of equations .x+y=0 .x^3-5x-y=0

**precalculus**

8. Solve the system of equations shown below. .3/4x-5/2y=-9 .-x+6y=28 x = 21.5, y = 8.25 x = -8, y = 6 x = 8, y = 6 x = -21.5, y = 8.25

**Social Studies**

The Free-Soil party would most likely agree with which of the following? Plantation system Manifest destiny (my answer) Increased immigration Popular sovereignty

**Physics**

The figure shows a pV diagram of a gas for a complete cycle. During part bc of the cycle, 1190 J of heat flows into a system, and at the same time the system expands against a constant external pressure of 7.00 Ã— 104 Pa as its volume increases from 0.0200 m3 to 0.0800 m3. ...

**math**

he coordinate plane below represents a city. Points A through F are schools in the city. graph of coordinate plane. Point A is at negative 5, 5. Point B is at negative 4, negative 2. Point C is at 2, 1. Point D is at negative 2, 4. Point E is at 2, 4. Point F is at 3, negative...

**World History**

How did the Shinto belief system develop in early Japan? A. Clans erected shrines to worship their ancestors. B. Buddhist ideas evolved into Shinto beliefs. C. Warriors built shrines to remember fallen comrades D. Clans honored powerful natural spirits and gods. Is the answer ...

**precalculus**

Which of the following would be the best first step when solving the following system using the substitution method? â€¢ x - y = -4 ; â€¢ x + 2y = 5 x = -4 - y x = -4 + y 2y = 5 - x 2y = 5 + x I have solved the equation but I am unsure which is the best first step. x-y=-4 x+2y...

**precalculus**

Which of the following would be the best first step for solving the system of equations by elimination? â€¢ 6.3x + 7.2y = 5.4 â€¢ 5.6x + 6.4y = 4.8

**History**

Why is urbanization associated with the industrial revolution? The expansion of family farms refocused the nation on agriculture â€¢â€¢ The concentration of factories in cities brought job opportunities Settlers expanded the frontier west of the Mississippi River Immigration ...

**Math**

The coordinate plane below represents a city. Points A through F are schools in the city. graph of coordinate plane. Point A is at negative 5, 5. Point B is at negative 4, negative 2. Point C is at 2, 1. Point D is at negative 2, 4. Point E is at 2, 4. Point F is at 3, ...

**Math**

The coordinate plane below represents a city. Points A through F are schools in the city. graph of coordinate plane. Point A is at negative 5, 5. Point B is at negative 4, negative 2. Point C is at 2, 1. Point D is at negative 2, 4. Point E is at 2, 4. Point F is at 3, ...

**American History**

The federal government sets requirements that all public schools must follow, while state governments set standards listing what students need to learn. This is an example of what constitutional system? A. dual federalism B. cooperative federalism C. layered federalism D. ...

**physics**

A block and tackle pulley system is used to lift a mass of 200 kg.if the machine has a velocity ratio of 5 and efficiency of 80%.sketch the possible arrangement of the system

**Physics**

Block A, with a mass of 10 kg, rests on a 36.9Â° incline. It is attached to a string that is parallel to the incline and passes over a massless, frictionless pulley at the top. Block B, also with a mass of 10 kg, is attached to the dangling end of the string. The two blocks ...

**American Government**

The federal government sets requirements that all public schools must follow, while state governments set standards listing what students need to learn. This is an example of what constitutional system? A. dual federalism B. cooperative federalism C. layered federalism D. ...

**Physics**

A tension spring opposes being stretched, but offers no resistance to being compressed (think of a slinky!). A tension spring, with an equilibrium length of 1.25 m, is suspended by one end from a ceiling at a height of 2.5 m above the ground; a mass of 100 g is attached to the...

**MATH HELP NEEDED prt 2**

â€“2v â€“ 7 = â€“23 (1 point) 15******** 8 â€“8 â€“15 2. start fraction x over 3 end fraction â€“ 10 = â€“12 (1 point) â€“6 â€“66 6****** 66 3. start fraction x over 5 end fraction + 6 = 10 (1 point) 44 30 20******** â€“20 4. 3(4 â€“ 2x) = â€“2x (1 point) â€“1 1 2********* 3 ...

**MATH HELP NEEDED**

. â€“2v â€“ 7 = â€“23 (1 point) 15******** 8 â€“8 â€“15 2. start fraction x over 3 end fraction â€“ 10 = â€“12 (1 point) â€“6 â€“66 6****** 66 3. start fraction x over 5 end fraction + 6 = 10 (1 point) 44 30 20******** â€“20 4. 3(4 â€“ 2x) = â€“2x (1 point) â€“1 1 2********* 3...

**science**

A system contains 0.15 m3Â of a gas at a pressure of 3.8 bar and 150 C. It is expanded adiabatically till the pressure falls to 1 bar. The gas is then heated at a constant pressure till its change in enthalpy is 70 kJ. Determine the total work done.Â

**math**

please check my answers below and correct me if i am wrong please 1. At Lexi Corp., sales revenue is $20 million, the cost of goods sold is $14 million, operating expenses are $3 million, and income taxes are $1 million. What is the company's operating income? Select one: A...

**American Government**

what kind of state court system is set up so that trial courts hears those cases arising within its own district, circuit, or county, no matter what the subject might be? A. appellate courts B. geographically based courts C. state supreme courts D unified court systems is the ...

**science**

A system contains 0.15 m3Â of a gas at a pressure of 3.8 bar and 150 C. It is expanded adiabatically till the pressure falls to 1 bar. The gas is then heated at a constant pressure till its change in enthalpy is 70 kJ. Determine the total work done.Â

**Circuits and electronics applications3**

Figure 1 below shows the circuit we'll be using to explore the step response of an RLC circuit. The voltage source produces a 1V step at t=0. Initially the resistor has been set to 0Î©. We'll be probing the voltage across the capacitor, which will indicate the amount of charge...

**Circuits and electronics applications3**

Consider the second order low pass filter circuit shown below. The differential equation associated with the input voltage vi(t) and the output voltage vo(t) of this system can be written in the following form: Aâ‹…d2vodt2+Bâ‹…dvodt+Câ‹…vo=vi Where the coefficients A, B, and C...

**physics**

A liquid stands at the same level in the u-Tube when at rest what will the difference in height h of the liquid in the two limbs of the u-Tube, when the system is given An acceleration a towards right? take a as area of a cross section and G as the acceleration due to gravity

**Algebra**

Create a system of equation that has no solution: - write the equations in two different forms(4) Create a system of equation that has infinitely many solution - write the equations in two different forms (4) One important Question: How am I suppose to form a table out of this...

**Gaussian Elimination Method**

Is my answer correct? Write the system of equations as an augmented matrix. Then solve for x and y. âˆ’4xâˆ’y=6 12x-2y=-8 Solution = -1,-2

**system of equations**

Write the system of equations as an augmented matrix. Then solve for x and y. -4x-y=6 12x-2y=-8

**Find the solution to the system of equations:**

Are my answers correct? x-2y+z=1 y+2z=2 x+y+3z=3 Solution : 100 010 001 x = 0.429 y = 0.429 z = 0.714

**Gaussian Elimination Method**

Write the system of equations as an augmented matrix. Then solve for x and y. 5x-4y=12 -5x+3y=9

**science**

How much work is done by the system if the internal energy decrease by 100j when 200j applied to the system

**physics**

Specific heat capacity of a certain metal is found by heating the metal and then placing it into water which is in a container made of the same material. The metal has mass of 100g and is heated to 100 degrees celsius. The container has mass of 200g and contains water of 500g ...

**Thermodynamic**

A system contains 0.15 m3Â of a gas at a pressure of 3.8 bar and 150 C. It is expanded adiabatically till the pressure falls to 1 bar. The gas is then heated at a constant pressure till its change in enthalpy is 70 kJ. Determine the total work done. Pl hlep me

**american goverment check answers**

9. What criteria might a judge who abides by a philosophy of judicial restraint use to decide a case? (1 point) The judge would consider previous court decisions on the topic but ultimately consider the current circumstances and changes in society. The judge would not consider...

**computer science**

In a particular phase modulation system, each symbol is able to represent 4 bits. What sort of PSK is being used?

**Econ check my answers please**

Below are a few questions I had difficulty with so please check my answers and correct me if I am wrong, thanks :) 1. Kim, a public relations manager, has just completed the process of checking the references of several job candidates. What should she do next? Select one: A. ...

**Economics**

Below are a few questions I had difficulty with so please check my answers and correct me if I am wrong, thanks :) 1. Kim, a public relations manager, has just completed the process of checking the references of several job candidates. What should she do next? Select one: A. ...

**Math**

Solving system of equations by substitution. 52. {5x-2/4+1/2=3y+2/2;7y+3/3=x/2+7/3

**ACCOUNTING**

Budgets are ___________________________. (Points : 1) A a tool for management to use to penalize managers with poor performance B detailed financial plans that quantify future expectations and actions C busy work assigned to keep department managers from wasting valuable time ...

**Science**

A system comprising blocks, a light frictionless pulley, and connecting ropes is shown. The 9 kg block is on a smooth horizontal table The surfaces of the 12 kg block are rough, with Î¼ = 0.30. In Figure 5.7, the mass M is set so that it descends at constant velocity when ...

**java program**

write aprogram that can display the payrol system

**math**

Two ships pursue straight-line courses at steady speeds. At each time t (in hours, where 0 less-than-or-equal t less-than-or-equal 14), the positions of the two ships are given by: Ship A (10t+35, 20t+25) Ship B (11t+15, 22t+15) These coordinates are with reference to a ...

**US History**

ALL of the countries below are matched CORRECTLY with the outcomes of colonization except for: a. English: established permanent settler colonies despite hardships b. Spanish: failed to find gold or to convert the Indians to Christianity c. French: succeeded in the fur trade ...

**American Government**

1) Why are independent regulatory commissions considered quasi-legislative? A) They are part of the legislative branch B) The rules and regulations they make have the force of law** C) They are independent of the executive branch but not the legislative branch D) They are ...

**Algebra**

An engineer designs a satellite dish with a parabolic cross section. The dish is 10 ft wide at theâ€‹ opening, and the focus is placed 8 ft from the vertex. â€‹a) Position a coordinate system with the origin at the vertex and theâ€‹ x-axis on theâ€‹ parabola's axis of symmetry...

**physics**

A 2.0 g bullet is shot with an initial velocity of 200.0 m/s into a board (I = 12.0 kg m2). The board is held still by a frictionless pivot a third away from its bottom end, as shown below. Assume that you can treat the board as a uniform rod. 1. What is the initial angular ...

**Physics**

A 4.0 g bullet is shot with an initial velocity of 300.0 m/s into a board (I = 19.0 kg m2). The board is held still by a frictionless pivot a third away from its bottom end, as shown below. Assume that you can treat the board as a uniform rod. 1) What is the initial angular ...

**Algebra**

An engineer designs a satellite dish with a parabolic cross section. The dish is 14 ft wide at theâ€‹ opening, and the focus is placed 4 ft from the vertex. â€‹a) Position a coordinate system with the origin at the vertex and theâ€‹ x-axis on theâ€‹ parabola's axis of symmetry...

**physics**

A system consists of a 0.130-kg chunk of ice floating in 1.12 kg of water, all at 0 âˆ˜C. Part A How much thermal energy must be added to the system to convert it to 1.25 kg of water at 15.0 âˆ˜C?

**Social Studies. Please help!**

3. Which of the following statements best summarizes the system of railroads shown on the map? A: The majority of the railroads that connected the North to the South were built by 1850. B: The railroads established by 1860 each began and ended at a major American city or port ...

**physics**

Acceleration of a Mass in a Pulley System Block 1 of mass m1 slides on a frictionless plane inclined at angle Î¸ with respect to the horizontal. One end of a massless inextensible string is attached to block 1. The string is wound around a frictionless movable pulley P of ...

**history**

1. Which statement best explains the significance of the signing of the Mayflower Compact? * 5 points A)The colonists swore to survive together or die in North America. B)The colonists agreed to create their own government and to obey its rules. C)The colonists declared their ...

**math**

Alice is working 2 jobs to save up money for a trip. She works at the ice cream shop for $9 an hour and babysitting for $12 an hour. She needs to earn at least $200 per week and can only work 20 hours per week. Write a system of inequalities to model the number of hours she ...

**Social Studies**

1.What prompted the call to rewrite the Articles of Confederation? A:The desire to win independence by unifying the nation B:The economic downturn caused by the limitations on the central government C:The need to establish a national court system to deal with uprising colonist...

**chemistry**

A process is carried out at constant pressure. Given that Î”E is positive and Î”H is negative, Select one: A. the system absorbs heat and contracts during the process. B. the system absorbs heat and expands during the process. C. the system loses heat and contracts during the ...

**Chemistry**

When you try to leave your room you learn that the only door out is locked. Assuming there is no air flow into the room (air tight with no ventilation system) how long can you survive in the room (5 meters long, 5 meters wide, 5 meters high) -Human tidal volume (volume of air ...

**Math (Algebra)**

A chemistry student needs to make 60 liters of a 30% alcohol solution. He has a 20% alcohol solution and a 40% alcohol solution in the lab. How many liters of each strength does he need to mix together *The system of equations I did was: a+b=60 & .2a+.4b=18. I may be wrong but...

**PHYSICS**

Heat transfer Q and work done W are always energy in transit, whereas internal energy E is energy stored in a system. Give an example of each type of energy, and state specifically how it is either in transit or resides in a system.

**Goverment**

list the advantages and disadvantages of confederal system of government

**chem**

At 25ÂºC and 1 atmosphere the following equilibrium is eatablished :Â 2NO (g) <=> N2O4 (g)Â The partial equilibrium pressure of N2O4 is 0.7 atm.Â A) calculate Kp of the above system at 25ÂºC.Â B) calculate the partial pressure of the above two gases at equilibrium ...

**chemistry**

At 25ÂºC and 1 atmosphere the following equilibrium is eatablished : 2NO (g) <=> N2O4 (g) The partial equilibrium pressure of N2O4 is 0.7 atm. A) calculate Kp of the above system at 25ÂºC. B) calculate the partial pressure of the above two gases at equilibrium when the ...

**Heath**

1. Which digestive organ is the last organ food passes through before reaching your stomach? (1 point) pharynx epiglottis esophagus mouth 2. Starches and sugars belong to which class of nutrients? (1 point) carbohydrates fats proteins enzymes 3. A method for assessing your ...

**science**

does to skeletal system send signals to yuor brain

**Physics**

A simple Atwoodâ€™s machine uses a massless pulley and two masses m1 and m2. Starting from rest, the speed of the two masses is 8.2 m/s at the end of 2.2 s. At that time, the kinetic energy of the system is 30 J and each mass has moved a distance of 9.02 m. Find the value of ...

**Physics**

A certain number of identical resistors are connected in series and their total resistance is measured. When the resistors are disconnected and re-connected in parallel, their total resistance drops to one-percent of the value measured when they were connected in series. How ...

**Calculus**

Which of the following would be the best first step when solving the following system using the substitution method? x - y = -4 ; x + 2y = 5 a. x = -4 - y b. x = -4 + y c. 2y = 5 - x d. 2y = 5 + x

**plz..chemistry help**

One mole of solid NH4Cl (s) isvheated in a closed box to decompose it partially according to the following reaction:Â NH4Cl (s) <=> NH3 (g) +HCl (g) Â A) calculate Kp of the above system at the temperature of the experiment if the partial pressure of ammonia at ...

**chemistry**

One mole of solid NH4Cl (s) isvheated in a closed box to decompose it partially according to the following reaction: NH4Cl (s) <=> NH3 (g) +HCl (g) A) calculate Kp of the above system at the temperature of the experiment if the partial pressure of ammonia at equilibrium ...

**Algebra 2**

1. By graphing the system of constraints, find the values of x and y that maximize the objective function. 2<=x<=6 1<=y<=5 x+y<=8 maximum for p=3x+2y A. (2,1) B. (6,2) C. (2,5) D. (3,5) 2. By graphing the system of constraints, find the values of x and y that ...

**Physics**

A mass-spring system undergoes simple harmonic motion with amplitude A.Does the total energy of the system change if the mass doubled but the amplitude is unchanged? Does the kinetic and potential energies depends on the mass? Explain.

**American Government**

"In politics, a political party acts as a 'bonding agent' to ensure the good performance of it's candidates and elected officeholders." USE THE QUOTATION TO ANSWER THE QUESTION 1. How do parties typically ensure the good performance of their candidates? A. They dictate how ...

**Science**

Which organ is NOT part of the Digestive System??

**Social Impact of Technology**

From Brad Reidâ€™s perspective, with respect to establishing a just and virtuous social order, how does he characterize the role of the legal system in the world of business? A. It is a vital tool when properly applied. B. It can be effective, but only when competitors agree ...

**Physics**

A particle of mass m1 = 2.5 kg moving along the x axis collides with a particle of mass m2 = 4.9 kg initially at rest. The incoming particle is deflected in the direction 22 degrees above the x axis, whereas the target particle moves off at 15 m/s at 37 degrees below the x ...

**science**

Particles of mass 3m and 5m hang one at each end of a light inextensible string which passes over a pulley.the system is released from rest with the hanging parts taut and vertical.during the subsequent motion the resultant force exerted by the string on the pulley is of ...

**Gaussian Elimination Method**

Write the system of equations as an augmented matrix âŽ§âŽªâŽ¨âŽªâŽ©u=150âˆ’7s+4m=25019sâˆ’11m=300

**SS Check Answers**

1. What value in American identity is most fundamental to the U.S. political system? A. indivual rights B. social conformity C. national security D. freedom from rule 2. Why was the Voting Rights Act of 1965 necessary A. Each citezen must be ruled by the same laws. B. Each ...

**Health**

3. Which is not a health professional who treats mental and emotional disorders? A psychiatrist B neurologist C social worker D psychologist 4. Arachnophobia, the fear of spiders, is an example of a(n) A. Personally disorder B. Anxiety disorder C. Mood disorder D. Impulse-...

**social studies**

which two of the following characteristics are necessary for a state to exist? territory** judiciary sovereignty constitution federal system organized government** separation of power

**HELP HISTORY**

why is the president allowed to appropriate government money in times of disaster? (im not sure of the answer) A) He an gaurantee the government loans to disaster areas B)He can react to emergencies more quickly than congress C)he dos not have the authority to declare federal ...

**physics**

(1) A uniform meter rod 4ON has a piece of weight of 2ON attached to one of its end. What is the center of gravity of the system from the weight end? (2) two bodies X and Y start from rest and move with uniform acceleration of a and 4a respectively. If the bodies cover the ...

**HELP WITH SCIENCE FAST**

1.Â Â MostÂ likely,Â ____Â wereÂ formedÂ whenÂ lavaÂ fromÂ theÂ moon'sÂ interiorÂ floodedÂ bowlÂlikeÂ regions onÂ theÂ moon'sÂ surface. (1Â point) maria* highlands craters basins 2.Â Â Currently,Â theÂ mostÂ supportedÂ theoryÂ ofÂ theÂ originÂ ofÂ theÂ ...