Sunday

January 22, 2017
**pre calculus honors**

solve the system if possible | x+y+z = 15 | | < 7x+y+z = 75 | | | 3x+y-z=29 a. x=10,y=2,z=3 b. x=â€“10,y=â€“2,z=â€“3 c. x=3,y=10,z=â€“3 d. x=12,y=9,z=â€“3 e. no solution; inconsistent system

*Wednesday, August 24, 2016 by evelyn*

**American government**

Which of the following is an advantage of a presidential government? A.The president is elected independently of the B.The president is part of the legislative branch of government. C.A system of checks and balances increases legislative power. D.A system of checks and ...

*Tuesday, August 23, 2016 by Kidthelearner*

**Educational Tech**

Before Katie turns in the paper she typed she wants a peer to review it and give her feedback. Katie uses her all in one printer to scan her edit,prints, and send them to her friend. An all in one printer is Choose two. 1. Input device 2. Output device **?? 3. Data storage ...

*Tuesday, August 23, 2016 by Savannah*

**Social Studies check my answers**

what value in amercan history is most fundimental to the us polititcal system? indivudual rights social conformity ******* national security freedom from rule

*Tuesday, August 23, 2016 by FluttershyK22*

**Social studies**

3) which of the following is an advantage of a presidential government? A) the president is elected independently of the legislature B) the president is part of the leg. Branch of government. C) a system of checks and balances increases legislative power. D) a system of checks...

*Tuesday, August 23, 2016 by Sam*

**American government**

The U.S. government is divided into three branches. What is this an example of? A. Separation of power*** B. Federalism C. Confederate system D. Interpretation

*Monday, August 22, 2016 by Kidthegamer*

**physics .Henry,Damon,Steve,Saed,bobpursley, And This is my question every one**

Same rental cars have a GPS unit installed, which allows the rental car company to check where you are at all times and thus also know your speed at any time. One of these rental cars is driven by an employee in the company's lot and during the time interval from 0 to 10s...

*Sunday, August 21, 2016 by himel*

**chem**

Under constant pressure, a system of gases is sealed in a cylinder and then allowed to expand. What can you conclude about the work associated with this change? A. Work is negative and is done to the system. B. Work is negative and is done by the system. C. Work is positive ...

*Saturday, August 20, 2016 by jessie*

**american government**

which statement best describes the views stated in thomas paineâ€™s common sense? A. citizens have the right to petition the government B. colonial government need a stronger system of courts C. colonies should declare their independence from Britain D. kings ...

*Friday, August 19, 2016 by leslie*

**Social Studies check my answers**

1 which of the following is true of a parliamentary system of a government but not of a presidential system? the government is nnot regulated by a constitution the judicial ranch is part of an unelected senate the legislative assembly is determined by a national election the ...

*Friday, August 19, 2016 by FluttershyK22*

**check my work**

3. Which of the following is an advantage of a presidential government? (1 point) The president is elected independently of the legislature. The president is part of the legislative branch of government. A system of checks and balances increases legislative power. A system of ...

*Friday, August 19, 2016 by kate*

**Physics**

Heat of 30 kcal is supplied to a system and 4200j of external work is done on the system so that it's volume decreases at constant pressure.what is the change in its internal energy (J=4200 j/kcal)

*Thursday, August 18, 2016 by Shaik Tanaaz*

**Chem**

During which stroke of a four-stroke internal combustion engine is the system's temperature raised because work is done to the gases? A. Compression stroke B. Power stroke C. Exhaust stroke D. Intake stroke

*Thursday, August 18, 2016 by Jessie*

**Science**

A farmer wants to determine if a new fertilizer gives her a better crop yield than her old fertilizer. She spreads the old fertilizer in field A, which has a brand new irrigation system. She spreads the new fertilizer in field B, which has an irrigation system that will be ...

*Thursday, August 18, 2016 by Sam Winchester*

**biology**

which of the following is not a characteristic of life A. maintains homeostasis B. composed of cells C. composed of atoms D. carries out metabolism which of the following must be true to consider something to be alive? A. it must be able to replicate it's DNA B. it must be...

*Wednesday, August 17, 2016 by leslie*

**biology**

which of the following is not a characteristic of life A. maintains homeostasis B. composed of cells C. composed of atoms D. carries out metabolism which of the following must be true to consider something to be alive? A. it must be able to replicate it's DNA B. it must be...

*Wednesday, August 17, 2016 by leslie*

**physics question**

Same rental cars have a GPS unit installed, which allows the rental car company to check where you are at all times and thus also know your speed at any time. One of these rental cars is driven by an employee in the company's lot and during the time interval from 0 to 10s...

*Wednesday, August 17, 2016 by himel*

**Social studies**

Which of the following is an advantage of a presidential government? A) the president is elected independently of the legislature B) the president is part of the legislative branch of government C) A system of checks and balances increases legislative power. D) is there checks...

*Tuesday, August 16, 2016 by Sam*

**Social Studies**

Why are conflicts between the executive branch and legislative branches of a parliamentary system government unlikely to occur? A. parliament as a whole maintains strict oversight over the executive branch B. The executive branch is a part of the parliament, which is the ...

*Monday, August 15, 2016 by Anastasia*

**Social Studies (check my answers)**

1. What was the initial purpose of the constitutional convention? To write the Constitution. To amend the Constitution.>>>my answer To amend the articles of confederation. To ratify the Constitution. 3. What did the Northwest Ordinance do for the Northwest Territory? ...

*Monday, August 15, 2016 by FluttershyK22*

**Social Studies**

Why are conflicts between the executive branch and legislative branches of a parliamentary system government unlikely to occur? A. parliament as a whole maintains strict oversight over the executive branch B. The executive branch is a part of the parliament, which is the ...

*Monday, August 15, 2016 by Anastasia*

**Science**

which of the following describes scientific inquiry? (1 point) a statement that describes what scientists expect to happen in an experiment facts, figures, and other evidence gathered through observation the diverse ways in which scientists study the natural world a well-...

*Monday, August 15, 2016 by LOVE*

**Socias Studies**

which of the following is an advantage of a presidential government? A. the president is elected independently of the legislative brach B. The president is part of the legislative branch C. A system of checks and balances increases legislative power D. A system of checks and ...

*Monday, August 15, 2016 by Anastasia*

**science**

if a 3118tata commercial vehicle apply barke with abs system at the speed of 40km/h,how much distance cover to stop the vehicle speed of 0km/h

*Saturday, August 6, 2016 by subhasis*

**math**

A real estate company has a fleet of cars. The annual operating cost per car is C = 0.25m + 1300, where m represents the number of miles traveled per year. Find the maximum number of miles that each car can travel per year to yield an operating cost of no more than $4000 per ...

*Thursday, August 4, 2016 by Kenny*

**Educational Technology**

Before Katie turns in the paper she typed she wants a peer to review it and give her feedback. Katie uses her all in one printer to scan her edit,prints, and send them to her friend. An all in one printer is (Multiple answers) 1. Input device 2. Output device 3. Data storage ...

*Thursday, August 4, 2016 by Sheara*

**math**

An oil company operates two Southern refineries. The Alabama facility produces 500 barrels of high-grade oil and 200 barrels of medium-grade oil per day. The Texas facility produces 600 barrels of high-grade and 400 barrels of medium-grade oil per day. By operating each ...

*Wednesday, August 3, 2016 by Kenny*

**Chem**

Consider the following equation in chemical equilibrium C2H4(g) <--> C2H6(g) + 137 kJ What happens to the ethane (C2H6) when the temperature of the system is increased

*Saturday, July 30, 2016 by David*

**matg**

Solve the system of equations by the elimination method 9/x++3/8y=-9/4 and -1/9x+5/4y=1/9

*Saturday, July 30, 2016 by keila*

**Calculus AB**

How do you solve a system of logarithmic equations? They have completely different bases: {(log(25)^3)x + (log(2)^7)y = log(5)^27 {(log(7)^8)x + (log(3)^5)y = log(49)^2

*Friday, July 29, 2016 by Carmen*

**Physics**

Considering a mass-spring system aligned horizontally moving at a velocity v. a) How will the velocity of the mass change if amplitude is doubled. b) How will the velocity of the mass change if the spring constant is quartered? I know the answer to the first one is that it ...

*Wednesday, July 27, 2016 by Lost*

**Aviation Security**

Question 1 of 20 Why is microwave holographic imaging not being used as a security measure in U.S. airports? A. The cost is prohibitive. B. It violates the Fourth Amendment rights of passengers. C. It issues too many false alarms. D. Each passenger must step into a closed ...

*Sunday, July 24, 2016 by KC*

**Help me anyone - Pre-Calc**

A farmer uses an irrigation sprinkler system that pivots about the center of a circular field. Determine the length of the sprinkler if an area of 2340 square feet is watered after a pivot of 20Â°. P.S: The formula is A=1/2 theta r^2 Please help me. Thank you.

*Saturday, July 23, 2016 by chizoba*

**physic**

A 2000 kg car is traveling at 20.0 m/s. Then, it puts on the brakes and comes to a complete stop. The heat generated due to the stopping heats up the brakes. The mass of the brake system is 20.0 kg and it has a specific heat of 0.200 kcal/kg Â°C. What is the increase...

*Saturday, July 23, 2016 by aina*

**Chemistry**

For the system, H2(g) + X2(g) <--> 2HX(g), Kc = 24.4 at 300 K. A system was charged with 2.00 moles of HX in a 3.00 liter container. The catalyst was introduced using a remote unit, and the system was allowed to come to equilibrium. How many moles of H2(g) will be ...

*Wednesday, July 20, 2016 by Val*

**Chemistry**

For the teaction system, 2SO2(g) + O2(g) <--> 2SO3(g), Kc has a value of 4.62 at 450.0K. A system, at equilibrium, has the following concentrations: [SO3] = 0.254 M, [O2] = .00855 M. What is the equilibrium concentration of SO2(g)? The correct answer is 1.28M, but I don...

*Wednesday, July 20, 2016 by Mikey*

**accounting**

What is the predetermined manufacturing overhead rate? The cost of the direct materials that can be used to manufacture the table are as follows. These cost are on a per unit basis. Table Top $ 1,700.00 Table Leg $ 500.00 Drawer $ 370.00 Assume a $35 per hour wage rate to the ...

*Monday, July 18, 2016 by koko*

**maths**

I applied Gauss Jordan on a matric and result what i get is x+2y=3 y=0 z=free How to find three intersection points for this system? Kindly help

*Saturday, July 16, 2016 by Asfand*

**Physics**

A 4.65-μF and an 9.30-μF capacitor are connected in series to a 60.0-Hz generator operating with an rms voltage of 111 V. What is the rms current supplied by the generator? The capacitors are in series so I used C = C1*C2/(C1 + C2) and got C = 3.1*10^-6 Xc = 1/wC...

*Wednesday, July 13, 2016 by Alli*

**Maths**

Solve the following system of linear equations by addition. Indicate whether the given system of linear equations is consistent, inconsistent, or dependent. If the system is consistent, find the solution. {−7x + 7y −9x + 9y == −21 −27

*Tuesday, July 12, 2016 by Leticia*

**Physics**

An object of area 15sqcm and height 2 cm has a mass of 50g. what is its density in SI system

*Monday, July 11, 2016 by Sherwin*

**Business Law**

Should debtors who voluntarily incurred debts such as purchase of a home theater system be able to receive the same benefits of filing bankruptcy as individuals who incurred debts involuntarily, such as emergency medical bills? Explain and support your answer with scholarly ...

*Monday, July 11, 2016 by Patte*

**Math(HELP PLEASE )**

solve the system. x=2-y and 3x+3y=6 parallel coincident 4,-2 1,1 I chose the last one and its incorrect

*Saturday, July 9, 2016 by Fe*

**math**

solve the system. Give the x-value of the solution. 3x-5y=16 and -9x+15=48 answer key: 7 0 no solution infinite number solution

*Saturday, July 9, 2016 by Fe*

**algebra**

Solve the system of linear equations x − 2y + 3z = 7 4x + 5y + z = −1 −x + y − 2z = −4 What is the value of z, y, and x?

*Saturday, July 9, 2016 by imani*

**Physics**

A 4.0-kg mass is placed at (3.0, 4.0) m, and a 6.0-kg mass is placed at (3.0, -4.0) m. What is the moment of inertia of this system of masses about the x-axis?

*Thursday, July 7, 2016 by Justin*

**Math**

Solve the following system of equations: −2x + y = 1 −4x + y = −1 (3, 1) (−1, 3) (−1, −3) (1, 3) ***

*Thursday, July 7, 2016 by tay*

**Economics**

1. Which of the following is the best example of a public good? A. Highway system B. Shopping mall C. Country club D. Movie theater 2. Which of the following is a characteristic of a public good? A. the private sector could provide it more efficiently B. it's benefits are ...

*Tuesday, July 5, 2016 by Clark*

**Physics**

A light, rigid rod 1.039m in length joins two particles with masses 3.65kg and 4.94kg at its ends. The combination rotates in the xy plane about a pivot through the centre of the rod. Determine the angular momentum of the system about the origin when the speed of each particle...

*Tuesday, July 5, 2016 by Helen*

**Neuroscience**

What type of cell in the central nervous system plays an important role in the uptake and processing of neurotransmitter from synaptic clefts/

*Tuesday, July 5, 2016 by R.Indira*

**Physics**

What mass would you hang on the right side of the system in the figure to balance it -- that is, to make the clockwise and counterclockwise torques equal? (Let x1 = 33 cm and x2 = 12 cm.)

*Sunday, July 3, 2016 by Annabelle*

**Sociology**

If you could make changes with regard to our social class stratification system, what changes would you make and why?

*Sunday, July 3, 2016 by John*

**Urgent help here! Math**

Solve for the area when a rectangle of length 4cm and width 3cm has one vertex at the origin of a system of axes and another vertex on a quarter of a circle whose center is also at the origin. Find the shaded area?

*Monday, June 27, 2016 by Vecchi*

**Math Urgent**

A rectangle of length 4cm and width 3cm has one vertex at the origin of a system of axes and another vertex on a quarter of a circle whose center is also at the origin. Solve for the area

*Sunday, June 26, 2016 by Vecchi*

**physics**

A block and tackle system of 5 pulleys is used to raise a load of 50kg through a height of 20m the work done against friction is 200J.Calculate the work done by effort,the efficiency of the system and the effort applied.

*Saturday, June 25, 2016 by Mohamedy*

**Probability and statistics**

Astronomers treat the number of stars in a given volume of space as a Poisson random variable. The density in the Milky Way Galaxy in the vicinity of our solar system is 1 star per 16 cubic light years. (a) What is the probability of 3 or more stars in 16 cubic light years? (b...

*Thursday, June 23, 2016 by Sarah*

**math**

Let f be the function defined on {-3, 1} by f (x)= (x+1)/x^2+ax+b and (C) its representative curve in an orthonormal system . Knowing that the two lines of equations x=1 and x=-3 are asymptotes to (C) calculate the values of a and b.

*Thursday, June 23, 2016 by vicky*

**Algebra**

The design team for a cloth manufacturer is sending a system of equations for another team to produce a cloth to make a diagonal print for a dress. Describe what type of system you think this might be. Give your answer as a system that is solved graphically and/or ...

*Wednesday, June 22, 2016 by Payton*

**Control systems**

What is the gain margin and phase margin of this equation which represents transfer function of a unity feedback control system G(s)=(4(1+0.5s))ÃƒÂ·(s (1+2s)(1+(s/20)+(s^2/8)))

*Tuesday, June 21, 2016 by Plz help*

**PHYSICS**

a mass of 3kg rests on smooth horizontal table connected by a light string passion over a smooth pulley at the edge of the table to another mass of 2kg hanging vertically. when the system is released from rest with what acceleration do the masses move and what is the tension ...

*Tuesday, June 21, 2016 by CHRISTINE*

**economics**

Part III: Calculate the Following Questions by Using the Necessary Steps (4 pts each) 1) A monopolist is deciding how to allocate output between two markets that are separated geographically. Demands for the two markets are P1 = 15 â€“Q1 and P2 = 25 â&#...

*Tuesday, June 21, 2016 by Belete*

**physics**

As an environmentally friendly idea, some have proposed using the temperature gradient of the ocean to generate electricity. This system would use the temperature gradient between the surface of the ocean (at about 200 C) and the water temperature at a depth of about 1 km (at ...

*Thursday, June 16, 2016 by Anonymous*

**Physics**

A multicylinder gasoline engine in an airplane, operating at 2500 rev/min, takes in 7800 J of energy and exhausts 4600 J for each revolution of its crankshaft. What is the mechanical power output of the engine in kilowatts.

*Thursday, June 16, 2016 by Anonymous*

**Physics**

As an environmentally friendly idea, some have proposed using the temperature gradient of the ocean to generate electricity. This system would use the temperature gradient between the surface of the ocean (at about 200 C) and the water temperature at a depth of about 1 km (at ...

*Thursday, June 16, 2016 by Anonymous*

**math**

what are the solutions to the system? y=x^2 - 6x+7 y=-x+13

*Monday, June 13, 2016 by james*

**Health Science**

1a) What are controceptive b) Name six types of controceptive c) Name 10 diseases associated with the reproduction system. Please help me

*Sunday, June 12, 2016 by somay*

**Math**

Write 1.5 billion to indian place value system.

*Saturday, June 11, 2016 by Raj*

**History ~ Help**

"Question: What factors led to the rise of Fascism?" "I'm not here to cheat, I'm here for help, any ideas? Thank You!" Throughout the 20th Century, Fascist leaders came to power in various countries, including Germany, Italy, Soviet Union, Japan, ...

*Friday, June 10, 2016 by Jimmy*

**Intro to computers 1**

Which logging category does not appear in Event Viewer by default? A. Application B. System C. Volume D. Security

*Friday, June 10, 2016 by Melanie*

**English**

Can you summarize this case study 300 words minimum? Overview Hospital A: Porter Regional Medical Center (PRMC) Located on the east side of town, Porter Regional Medical Center (PRMC) was a for-profit hospital, consisting of 110 hospital beds, 8 of which were reserved for ...

*Thursday, June 9, 2016 by sarah*

**Math**

What must be true about the solution to this system of equations? x+4y+9z = -96 -2y+9z = -47 z = -7 a) The solution will describe the intersection point(s) of the 3 graphs. b) The value of z must be -7. c) The solutions will have values for x, y, and z. d) All of the above ...

*Thursday, June 9, 2016 by David*

**Algebra**

Create a system of equations that includes one linear equation and one quadratic equation. Part 1. Show all work to solving your system of equations algebraically. Part 2. Graph your system of equations, and show the solution graphically to verify your solution.

*Thursday, June 9, 2016 by Sally*

**physics**

4mm=0.004m 2cm=0.02m 2kg=2000g 4kg= ____m 2) 5 physical senses and why their considered physical -touch,hearing,smell,taste,sight their considered physical because The nervous system has a specific sensory system or organ, dedicated to each sense?

*Thursday, June 9, 2016 by Rein*

**Physics**

The system shown in the following figure is in static equilibrium. Find the frictional force exerted on block (m1) given that the mass of block (m1) is 8.90 kg, the mass of block (m2) is 2.59 kg, and the coefficient of static friction between block (m1) and the surface on ...

*Thursday, June 9, 2016 by Eric Sowell*

**geography**

Under the Soviet system, the government a. controlled all forms of communication. b. allowed newspapers to print whatever they wanted. c. controlled editorials but not the reporting of news. d. encouraged access to a wide variety of news sources.

*Thursday, June 9, 2016 by sarah*

**Pre-Calculus Matrix**

Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. Show your work. 4x - y + 3z = 12 x + 4y + 6z = -32 5x + 3y + 9z = 20 4 -1 3 12 1 4 6 -32 5 3 9 20 I believe that the solution does not exist and how can I prove that?

*Wednesday, June 8, 2016 by Alexa*

**Physics**

A light spring of force constant 8N/m is cut into two equal parts and then are connected in parallel the equivalent force constant will be what of the system. Solve this problem

*Wednesday, June 8, 2016 by Shadab*

**Pre-Calculus**

Solve the system of equations using matrices. Use Gaussian elimination with back-substitution. x + y + z = -5 x - y + 3z = -1 4x + y + z = -2 I really need help.. 1 1 1 -5 1 -1 3 -1 4 1 1 1 -2 I've done so many different methods to solve this and I get stuck..

*Tuesday, June 7, 2016 by Alexa*

**Science ~ Astronomy**

Which evidence provides support for the nebular theory: a) scientists have observed the formation of a distant solar system b) the nebular theory has been proven mathmatically c) astronomers have observed protoplanetary disks around distant newborn stars d) none of the above I...

*Monday, June 6, 2016 by Zee*

**Algebra 2**

What is the solution set to the following system? x + y = 5 and x^2 + y^2 = 25 A) (0,-5) (-5,0) B) (0,5) (-5,0) C) (0,-5) (5,0) D) (0,5) (5,0)

*Sunday, June 5, 2016 by Rebecca*

**physics**

A 0.02kg bullet is fired at a 3.5kg block which is initially at resr on a table. The bullet embeds in the block. Friction converts the 24.02J of kinetic energy to heat and brings the block and bullet system to stop. How fast was the bullet and block system sliding immediately ...

*Sunday, June 5, 2016 by ChrismB*

**Math w/reply**

Hey there, just need help with these two. I need someone to help explain them to me/break them down. 1. gr 1/100=_____mg Answer: 0.6 2. 0.3mg= gr_____ Answer: 1/200 3. gr iii /ss= ______mg Answer: 210 Thank you in advance! *** REPLY: I did not get these answers. These are the ...

*Sunday, June 5, 2016 by Anonymous*

**Chemistry**

For the equilibrium system below, which of the following would decrease the concentration of 𝑃𝐶𝑙3(𝑔)? 𝑃𝐶𝑙3(𝑔) + 𝐶𝑙2(𝑔) ↔ 𝑃𝐶𝑙5(𝑔) + 45𝑘&#...

*Saturday, June 4, 2016 by Help:(*

**Chemistry**

7. For the equilibrium system below, which of the following would increase the concentration of 𝐻2𝑂(𝑔)? 𝐶(𝑠) + 𝐻2𝑂(𝑔) + 131𝑘𝐽 ↔ 𝐶𝑂(𝑔) + 𝐻2(𝑔) a. ...

*Saturday, June 4, 2016 by Urgent*

**physics**

A 0.02kg bullet is fired at a 3.5kg block which is initially at rest on a table. The bullet embeds in the block. Friction converts the 24.02J of kinetic energy to heat and brings the block and bullet system to stop. How fast was the bullet and block system sliding immediately ...

*Saturday, June 4, 2016 by ChrismB*

**Geometry**

Find the points of intersection of the line X+Y=5, and the circle x^2+y^2=25 by solving the system of equations.

*Thursday, June 2, 2016 by Gen*

**Pre-Calculus**

Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. Show your work. 4x - y + 3z = 12 x + 4y + 6z = -32 5x + 3y + 9z = 20 Please help me..

*Thursday, June 2, 2016 by Liz*

**Pre-Calculus**

Solve the system by the substitution method. Show your work. 2y - x = 5 x2 + y2 - 25 = 0 I solved the problem but I got it wrong for some reason..can you solve it step by step?

*Thursday, June 2, 2016 by Liz*

**MATH**

Two cell phone companies have different rate plans. Runfast has monthly charges $25 plus $10 per gig of data. B A &Dâ€™s monthly charge is $18 plus 15 per gig of data. Your task is to determine under what circumstances each company has the better pricing. You ...

*Thursday, June 2, 2016 by SOMEBODY PLEASE HELP !*

**U.S. History (Check!)**

1. True or false: The Watts Riot was a race riot in the Watts neighborhood. A: True 2. True or false: The Civil Rights Act of 1964 was the biggest civil rights law passed in the U.S. A: True 3. True or false: Malcolm X died of old age in 1983. A: False 4. True or false: Martin...

*Thursday, June 2, 2016 by Victoria*

**U.S. History (Check)(REED)**

1. True or false: The Watts Riot was a race riot in the Watts neighborhood. A: True 2. True or false: The Civil Rights Act of 1964 was the biggest civil rights law passed in the U.S. A: True 3. True or false: Malcolm X died of old age in 1983. A: False 4. True or false: Martin...

*Wednesday, June 1, 2016 by Victoria*

**Math - system of eqns**

Consider the system of equations: x1 + x2 + x3 = 6, −x1 − 2x2 + 3x3 = 1, 3x1 − 4x2 + 4x3 = 5. (a) Write down the augmented matrix for this system (b) Use elementary row operations to reduced the augmented matrix to reduced row-ecehelon form FOR A: Ive got: 1 ...

*Wednesday, June 1, 2016 by Drake*

**math plz help ;-;**

Determine the x-coordinate of the solution of the system of equations below. You may use any method: 2x-y=10 x+y=2 Determine the y-coordinate of the solution for the system of equations. You may use any method. 2x-y=10 x+y=2 Plz help i really don't understand these two Q ...

*Wednesday, June 1, 2016 by leo*

**chemistry**

Some physical properties of water are shown below: melting point 0.0Â°C boiling point 100.0Â°C specific heat solid 2.05 J/gÂ·Â°C specfic heat liquid 4.184 J/gÂ·Â°C specific heat gas 2.02 J/gÂ·Â...

*Tuesday, May 31, 2016 by Selena*

**Math**

Lisa and Katie are playing a card game, and a total of 900 points has been scored. Lisa scored 400 more points than Katie. If you let l= l= the number of points that Lisa scored, and k= k= the number of points that Katie scored, then the problem can be represented by the system:

*Monday, May 30, 2016 by Andy*

**math plz help ;-;**

1. Solve the system by any method: 2x-5y=-1 2x-y=1 How many solutions does the system of equations below have? Explain your answer. y=3/5x-1 y=6/10x+3 plz help me ;-; i don't understand how to do this, sorry ;-;

*Monday, May 30, 2016 by leo*

**Pre calculus**

olve the system of equations using matrices. Use Gaussian elimination with back-substitution. x + y +Â zÂ Â ;Â Â =Â Â Â Â Â -5 x - yÂ + 3z&...

*Sunday, May 29, 2016 by Kim*

**Algebra, please help**

I've been stuck for a while on this problem Which ordered pair represents the solution to the system of equations? { 5x+3y=7 { 3x-5y=-23

*Thursday, May 26, 2016 by Ayden*

**math**

Elimination was used to solve a system of equations. One of the intermediate steps led to the equation 9x=27 . Which of the following systems could have led to this equation? 4x+3y=24 −5x−3y=3 7x−2y=15 x+y=6 9x+2y=21 −9x−2y=21 10x−y=15 x+y...

*Thursday, May 26, 2016 by Claire*

**physics**

a submarine fitted with a SONAR system operates at a frequency 50kHz. An enwmy submarine is now moving towards it with a speed of 450km/hr. Find the frequency of the sound received back at the SONAR from the enemy submarine. Velocity of sound in water is 1450m/s.

*Wednesday, May 25, 2016 by please Help urgently*