# Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

91,718 questions, page 306
1. ## chem

ive tried the ice method but i keep on getting it wrong please help. If the initial pressure of NH3(g) is 3.168 atm, calculate the % decomposition of NH3(g) when the reaction comes to equilibrium according to the balanced equation. The value of Kp at 427.0

asked by Anonymous on October 1, 2016
2. ## Math

The Suva Energy Information Administration reported that 51.7% of homes in Suva were heated by natural gas. A random sample of 200 homes found that 115 were heated by natural gas. Does the evidence supports the claim, or has the percentage changed? (use a

asked by Krish on October 25, 2014
3. ## accounting

JKL Company purchased a car for \$21,000 on January 1, 2016. The vehicle is estimated to have a useful life of 10 years, at which point it will have a residual value of \$1,000. JKL Company uses the straight-line method to account for depreciation. What is

asked by jashan on March 3, 2019
4. ## CHEMISTRY

What is NOT is good laboratory method for preparation of oxygen gas? is the anwser here C or am i wrong A)photosynthesis B)electrolysis of water C)catalytic decomposition of hydrogen peroxide D) thermal decompositon of KClO3 Photosynthesis is not a good

asked by CHEMgurl on April 21, 2007
5. ## Science

I need to know what type(s) of research method this study used. In the study, participants were asked questions before and after receiving a treatment. The catch is that this study had no control group, so the results were gathered from comparing

asked by Anonymous on November 27, 2015
6. ## physics (cross product vectors)

Two vectors are lying in the xz plane: A=2.00i + 3.00k and B= -9.00i + 2.00k. a) What is the value of AxB? Check my solution: I found through calculations that the value is 23j. b) What is the magnitude |AxB|? I could do ABsin theta, but I have no angle

asked by steve on January 23, 2007
7. ## math (statistics)

There are 15 qualified applicants for 5 trainee positions in a fast-food program. How many groups of trainees can be selected? I have a feeling that the answer is 75 but I'm not too sure. Any help is appreciated. Thank you! The first trainee can be any one

asked by vivian on April 9, 2007
8. ## basic geometric

a would like to get someone too help me with these math problem. Two angles of a triangle are 40 degrees and 62 degrees; what is the third angle's measur? The angles of a triangle always adds to 180o. You know two of the angles, solve for the third. can

asked by vero on March 11, 2007
9. ## C++

#include #include int main ( ) { int choice; cout

asked by asdf on July 10, 2008
10. ## Calculus

Can someone explain the method of implicit differentiation to me. I know that we differentiation both sides of the equation with respect to x (I don't understand what they mean by with respect to x). And then y is a function of x...I don't understand what

asked by Samantha on November 3, 2008
11. ## Calculus

Can someone explain the method of implicit differentiation to me. I know that we differentiation both sides of the equation with respect to x (I don't understand what they mean by with respect to x). And then y is a function of x...I don't understand what

asked by Samantha on November 3, 2008
12. ## Chemisdtry - Lewis Structures (check + help)

Draw Lewis structures for each of the following ion: CO3 (2-) I tried this method below, i do not know where am i going wrong, please help me understand this concept for ions. Valence Electrons 4e- + 18e- = 22e- Noble gas Config 8e- + 24e- = 32e- Total

asked by Farah on February 13, 2011
13. ## ethn- please revise

should United States government policy favor certain kinds of immigrants? Should ( citizenship) preference be given to the neediest applicants? The most talented? The most oppressed? The richest? should applications from certain countries be given

asked by rose- (Ms. Sue) on June 26, 2008
14. ## chemistry

KCl(s) → K+(aq) + Cl‾ (aq) Solid KCl dissolves as shown in the above equation. A 6.60 g sample of KCl was dissolved in 42.3 g of water. The initial temperature of the water was 21.90°C. After the compound dissolved, the temperature of the water was

asked by sam on September 26, 2012
15. ## algebra

2. As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. a. The sales representative here tells you they also have two floor plans available, but they only have

asked by Devin on March 31, 2010
16. ## math (pls help)

Amelia's parents and grand parents have both opened savings accounts to save for Amelia's education this year. Amelia's parents' savings account earned 5% interest and her grandparents account earned 8% interest. This year the two savings accounts have

asked by Bill on January 23, 2007
17. ## math

Last year, a property managerbought five identical snow shovels and six identical bags of salt. The total ost of the snow shovels was \$172.50, before tax, and each bag of salt cost \$6.20,before tax. This year, the property manager bought two identical snow

asked by sree on August 30, 2017
18. ## math

Last year, a property managerbought five identical snow shovels and six identical bags of salt. The total ost of the snow shovels was 4172.50, before tax, and each bag of salt cost 46.20,before tax. This year, the property manager bought two identical snow

asked by sai on August 30, 2017
19. ## math

Can you use a proportion to solve any ratio problem? If your answer is yes, which ratio problem would you not use a proportion to solve? if your answer is no, which ratio problem would you be able to solve?

asked by samantha on September 28, 2008
20. ## math

Can you use a proportion to solve any ratio problem? If you answer is yes, which ratio WOULD you NOT use a proportion to solve. If you answer is no, which ratio problem COULD you Not use a proportion to solve?

asked by Kasia Neil on September 30, 2010
21. ## college/ accounting

The E-Company The E-Company manufactures trendy, high-quality moderately priced watches that it sells on the Internet. As the company's senior financial analyst, you are asked to analyze the overall profitability fo the current year. The CFO has heard that

asked by Tracy on September 30, 2009
22. ## accounting

The E-Company The E-Company manufactures trendy, high-quality moderately priced watches that it sells on the Internet. As the company's senior financial analyst, you are asked to analyze the overall profitability fo the current year. The CFO has heard that

asked by Tracy on September 30, 2009
23. ## Chemsitry

The Ksp of PbBr2 is 6.60× 10^–6. What is the molar solubility of PbBr2 in pure water? What is the molar solubility of PbBr2 in 0.500 M KBr solution? What is the molar solubility of PbBr2 in a 0.500 M Pb(NO3)2 solution?

asked by Anon on March 17, 2013
24. ## Physics Last Question HEEEELLLPPP !

#1 The internal energy of the gas in a gasoline engine’s cylinder decreases by 295 J. If 47.0 J of work is done by the gas, how much energy is transferred as heat? #2 If an ideal gas does work on its surroundings: a. The internal energy of the gas

asked by Jarrid on December 12, 2010
25. ## 5-6 th grade self contained spec ed class

HELP! NExt year I am the 5th and 6th grade self contained Spec. Ed teacher. I have ONE 5th grader and about 10 6th graders...HOw do I teache rboth curriculums in one day??Particularily Soc. Studies and Science?? Thanks Please check with your principal,

asked by Nancy on June 27, 2007
26. ## English

Which phrase from Marge Piercy's "To Be Use" best illustrates the poem's celebratory tone toward hard work? I want to be with people who submerge in the task, who go into the fields to harvest and work in a row and pass the bags along, who are not parlor

asked by Kaai97 on June 13, 2016
27. ## PHysics!!

Starting from rest at a height equal to the radius of the circular track, a block of mass 25 kg slides down a quarter circular track under the influence of gravity with friction present (of coefficient μ). The radius of the track is 15 m. The acceleration

asked by Bob on May 8, 2012
28. ## chemistry

What is the composition of a methanol () – propanol () solution that has a vapor pressure of 121 torr at 40°C? At 40°C, the vapor pressures of pure methanol and pure propanol are 303 and 44.6 torr, respectively. Assume the solution is ideal. Mole

asked by savanna on October 5, 2016
29. ## science

pick two systems in the body and explain how they interact interact with what? each other? elaborate plz. The respritory system and circulatory system are dependant upon each other. All respirations eventualy take place at the cellular level. When you

asked by jon'dreneque on February 12, 2007
30. ## History

The Code Talkers were members of which Native American tribe? Apache Hopi Navajo******** Pueblo 2. Why was the Code Talkers' code so hard to break? It was based on a language that lacked an alphabet and was hard to learn. The people who developed it came

asked by Patty on September 10, 2015
31. ## algebra

Suppose you want to add a sprinkler system, and the location of one section of the sprinkler line can be described by the equation .

asked by frustrated on February 15, 2008
32. ## science

Locate the rivers in Central Nevada. Why are these rivers not part of a larger river system?

asked by Anonymous on February 9, 2009
33. ## Science

I need to make a story about digestive system and the story need to begin with a piece of food..plsssss help

asked by Eunji on October 18, 2016
34. ## Bio

What digestive enzymes does the pancreas produce (pertaining to the digestive system only)? The only one I know is Pancreatic Amylase. Are there any more?

asked by Lena on November 28, 2008
35. ## physics

The two conditions for equilibrium often result in a system of equations such as F1 + F2 = 44.0 N and 3.00F1 − 8.00F2 = 0. find F1 and find F2

asked by alba on March 6, 2015
36. ## Math/Algebra

y^2+6+2(y^2+5) My answer is 3y^2+16 (simplifying) but the hawkes learning system won't accept this answer. Am I missing something?

asked by Laurie on September 4, 2012
37. ## Math(Please check! Thank you!!)

metric system conversions 1)3.68kg = ? g (3.68 kg) (10^-3 / 1kg) = 3.68 x 10^-2 g 2) 568cm = ? m (568cm) (1 m /100cm) = 5.68 m Are these correct?

asked by Hannah on September 11, 2011
38. ## Physics

A 50kg mass and a 85kg mass are hung over a frictionless pulley what is the acceleration of the system

asked by Sam on May 26, 2014
39. ## Math

Explain why the digits in a place value system with base, b, are 0,1,... b-1 and why no digits for numbers greater than b-1 are needed

asked by Jessica on September 12, 2012
40. ## math

Suppose you want to add a sprinkler system, and the location of one section of the sprinkler line can be described by the equation

asked by Anonymous on December 7, 2009
41. ## home economics

a system of government in which powers are divided between a central government and several regional goverments is call?

asked by deajia on April 28, 2010
42. ## physics

A 18 kg object and a 6 kg object are hanging over a frictionless pulley. What is the acceleration of the system to the nearest tenth?

asked by JUan on November 9, 2009
43. ## foundation of ht ecriminal justice system

the crime control model and the due process model. Which aspect of the system do you believe is more effective

asked by sandy on June 26, 2008
44. ## Biology

Why is damage to skin or muscle usually easily repaired, but damage to the brain or nervous system is not? Thanks.

asked by Bee on October 7, 2010
45. ## Pyhsical Science

What is a system of knowledge and the methods used to find that knowledge? A. science B. technology C. measurement D. curiosity I think it's D.

asked by Brandon on August 27, 2013
46. ## college

I am stuck with this question. Which system would one believe in and more effective control model or due process model.

asked by DJ on November 15, 2008
47. ## math

Suppose you want to add a sprinkler system, and the location of one section of the sprinkler line can be described by the equation. Y= -1/2x-4 x y (x,y) -1 -2 -4 2 8

asked by scooby9132002 on May 31, 2009
48. ## Texas Government

The federal income tax in the U.S. is a benefit-based system. a. yes b. no I would say yes? Is it because they gain benefit from the taxes ?

asked by HM on November 23, 2011
49. ## ss

what is a federal system of government? Basically...it's a government with central powers. Like, it's what we have in the U.S., with the 3 main branches.

asked by Jackie on December 13, 2006
50. ## Economics

Pick one MARKET in which the price system does not produce an equitable price and quantity of output.

asked by TSK on September 19, 2010
51. ## Science

I need to make a story about digestive system and the story need to begin with a piece of food..plsssss help

asked by Eunji on October 18, 2016
52. ## Health

How does the system of health care provision in the U.S. support the goals of public health? Please provide an example.

asked by DonnaK on May 3, 2012
53. ## Medical Billing & Coding

The ICD-PCS system uses a tool coders have never used before. What is it? a. Incisional biopsy b. excisional biopsy

asked by Arlene on October 31, 2013
54. ## Chemistry

A system is represented by the following equation: 2A(aq) + B(aq) --> 3C(aq) At equilibrium, [C]=0.6 M. Calculate the value of K if initially 1 mol of A and 2 mol of B were placed in a 1 L flask.

asked by Sandra on May 11, 2012
55. ## Algebra

Find the number of solutions for this system of equations. 3x + 5y = 20 -2x +5y = 20 How can I do this (and for other systems of equations) without taking all day? Thanks!

asked by Bella on February 26, 2009
56. ## algebra

The sum of two numbers is 30 and their difference is 2. Find the two numbers by writing and solving a system of equations.

asked by billy on March 4, 2014
57. ## algebra ll

the first equation of the system is mutiplied by 4, by what number would you mutiply the second equation to eliminate the y variable by adding? first: 2x+5y=16 second:8x - 4y =10 i got 2 0r 5 im not sure which one

asked by Anonymous, on August 15, 2008
58. ## anatomy'

disease is an unhealthy state of a. organ system b.the entire body c. an organ d.all are true

asked by jaz on September 19, 2011
59. ## Chemistry

26.5 kJ of heat is added to 5.44 g of ice at 0 C. What phase(s) are present and what is the temperature of the system after all the heat is absorbed?

asked by Polina on October 23, 2014
60. ## biology

If a microscope has a 40× objective lens in place and a 15× eyepiece lens, the magnification of the system under these conditions is

asked by oihln on August 6, 2014
61. ## Algebra

The sum of two numbers is 30 and their difference is 2. Find the two numbers by writing and solving a system of equations.

asked by KevinJ on February 27, 2014
62. ## MATH

Explain why the digits in a place value system with base, b, are 0,1,... b-1 and why no digits for numbers greater than b-1 are needed

asked by TAY on September 12, 2014
63. ## Science

Which sphere of the Earth system contains nearly all of Earth's mass? A. the geosphere B. the atmosphere C. the biosphere D. the hydrosphere

asked by Deazzy on April 13, 2015
64. ## Algebra II

Describe the system 6x-2y=10 and 9x-3y=8 as consistent and independent, consistent and dependent, or inconsistent. Explain. I don't know how to do this one

asked by Jon on December 16, 2007
65. ## Civics

In the federal system, how is sovereign power divided among state and federal laws and constitutions?

asked by Bob on November 4, 2009
66. ## Math

"A system of equations can have two answers beside an actual set of coordinates. What are they?" Would the two other answers be graphing and ratio, or ..

asked by Anonymous on May 21, 2015
67. ## world history

explain how the alliance system involved countries with no other national security interest involved.

asked by zelda on January 13, 2011
68. ## health care

How does the system of health care provision in the U.S. support goals of public health? Provide an example.

asked by Ann on May 25, 2013
69. ## Oceanography

What is OIL/RIG? What is its importance in the nitrogen cycle? How does nitrogen enter a marine system?

asked by Malyssa on March 13, 2008
70. ## chemistry

Calculate the pH of a buffer system composed of 0.880 M C5H5N and 0.660 M C5H5NHNO3. The Kb for C5H5N is 1.70 x 10^-9.

asked by darryl on March 18, 2014
71. ## Science

Metric System How do I know when to multiply and when to divide when converting to metric or from? Sample- 450km=______mi

asked by Elizabeth on September 17, 2007
72. ## English

Hello If you had a topic "Murphy s law" and you had to work on it in the classroom for 90 minutes, what would you do? I have a text on Murphy s law, I thought to teach the children time clauses. My idea: work on the text for 45 minutes and then introduce

asked by Mark on February 5, 2012
73. ## Math

The average of X numbers is 15. If the sum of the X numbers is 90, what is the value of X? A)5, B)6, C)8, D)15 or E)75 What is the correct answer and how do you set up the equation? The answer is b)6 because if there are 15 average numbers and the sum is

asked by George on February 25, 2007
74. ## Finance

Please answer these questions: 1. After a protracted legal case, Joe won a settlement that will pay him \$11,000 each year at the end of the year for the next ten years. If the market interest rates are currently 5%, exactly how much should the court invest

asked by Ecs on November 9, 2009
75. ## human resources

o Name three selection tools that you would consider using to hire a police officer. o Choose what you think is the best selection tool or combination of selection tools in choosing the best candidate. o Detail which interview method would be most

asked by Lacy on May 2, 2011
76. ## chemistry

Using the PM3 semiempirical method in HyperChem, treat planar napthalene. First build the molecule, choose SemiEmpirical methods and PM3, and perform a Geometry Optimization. Look in the "Compute>Orbitals" menu to determine the energies of the HOMO and

asked by muneer on April 22, 2013
77. ## English

a persuasive article starting with an event like "On October 18, 1990, a young man waked into St. Paul's Cathedral in London England....." Is this an effective method to interest the reader. Also, is starting a persuasive article or essay with a historical

asked by Amy on October 8, 2014
78. ## Chemistry

LiI(s) → Li+(aq) + I‾ (aq) Solid LiI dissolves as shown in the above equation. A 8.00 g sample of LiI was dissolved in 57.5 g of water. The initial temperature of the water was 21.40°C. After the compound dissolved, the temperature of the water was

asked by Sug on February 10, 2010
79. ## Chemistry

1. A student uses 6M HCl solution contaminated with Al(NO3)3 to wash the nichrome wire in between recordings of emission spectra for the different known and unknown metal ion solutions. The emission energies for the aluminum are 3.90x10^-19 J/atom,

asked by Sandy on February 16, 2014
80. ## CHEM

A gaseous hydrocarbon (an organic compound consisting of C & H) weighing 0.232g occupies a volume of 102mL at 23 degrees Celcius and 749mmHg. Calculate the molar mass and identify the compound. The compound is: a)C2H4 b)C3H6 c)C4H8 d)C5H10 e)C6H12 How is

asked by K on December 13, 2006
81. ## Demand Planing and Forecasting

A retail outlet deals with a wide range of gift articles (ranging in unit value from Rs 100 to Rs 1000). Identify the various factors influencing the demand and sales for this range of gift articles. What kind of data inputs will be useful for this

asked by Omprakash on April 22, 2013
82. ## english

I need someone's help on editing my paragraph.... OPC is a great place for an athlete because OPC offers many options for the athletes and don’t forget about their countless banners. OPC as school give the athlete’s the opportunity to choose from a

asked by Jim on March 30, 2015
83. ## chemistry

What is the solubility of AgCl when it is in a solution of 0.15 M NaCl? (AgCl has Ksp = 1.8 x 10-10.) Make a reaction table. Include rows for initial concentration, change in concentration, and equilibrium concentration. Write down the equation for the Ksp

asked by Anonymous on May 4, 2012
84. ## AP Chem

A chemist added an excess of sodium sulfate to a solution of a soluble barium compound to precipitate all of the barium ion as barium sulfate, BaSO4. How many grams of barium ion are in a 458-mg sample of the barium compound if a solution of the sample

asked by Anna on November 3, 2008
85. ## chemistry

What is the solubility of AgCl when it is in a solution of 0.15 M NaCl? (AgCl has Ksp = 1.8 x 10-10.) Make a reaction table. Include rows for initial concentration, change in concentration, and equilibrium concentration. Write down the equation for the Ksp

asked by Anonymous on April 23, 2012
86. ## Social Studies (Check, Please!)

1. What events in Roosevelt's life shaped his ideas and characters? A: Roosevelt's marrying his wife (Eleanor Roosevelt), winning a seat in the New York State Senate, becoming assistant secretary of the navy, suffering from polio, and being elected as the

asked by Victoria on November 28, 2015
87. ## macroeconomics 2year uni

Consider the following numerical version of the IS-LM model: C = 60 + 0.6Yd I = 150 – 10i YD = Y – T T = 200 G = 250 Real money demand: (M/P)d = (40 + 0.1 Y – 10i)P Real money supply (M/P)s = 80 P = 2 Where Y is output, Yd is disposable income, C is

asked by ismail on April 23, 2009
88. ## physics

Again, I know I keep posting questions but I'm begging you for help. At 25°C the vapour pressure of pure pentane is 511 torr and that of hexane is 150. torr. What is the mole fraction of pentane in a pentane-hexane solution that has a vapour pressure of

asked by anonymous on April 11, 2012
89. ## I would like to understand my calc homework:/

Consider the differential equation given by dy/dx=(xy)/(2) A) sketch a slope field (I already did this) B) let f be the function that satisfies the given fifferential equation for the tangent line to the curve y=f(x) through the point (1,1). Then use your

asked by Amber on March 27, 2013
90. ## Chemistry

A 1.00 g sample of enriched water, a mixture of H2O and D2O, reacted completely with Cl2 to give a mixture of HCl and DCl. The HCl and DCl were then dissolved in pure H2O to make a 1.00 L solution. A 25.00 mL sample of the 1.00 L solution was reacted with

asked by Adam on September 21, 2012
91. ## help,math

can some set the equation up for me. Science and medicine. A plane flies 720 mi against a steady 30-mi/h headwind and then returns to the same point with the wind. If the entire trip takes 10 h, what is the plane’s speed in still air? i thought it was

asked by jas20 on February 25, 2007
92. ## English

1. This is the house where he lives. 2. This is the house in which he lives. 3. This is the house that/which he lives in. 4. This is the house that he lives. 5. This is the house he lives. 6. This is the house he lives in. ============== Among the 6

asked by rfvv on December 29, 2015
93. ## math,help,algebra I

I need help can someone help me get unstuck and let me know if i am correct.thank you. solve by completing the square. 4x^2+2x-3=0 this is what i am doing: i used the quadratic equation. so where i am is in this step: x = (-2 (+-) sqrt (-44))/(8) from this

asked by jasmine20 on April 14, 2007
94. ## math/algebra

Sally bought three chocolate bars and a pack of gum and paid \$1.75. jake bought two chocolate bars and four packs of gum and paid \$2.00. Find the cost of a chocolate bar nad the cost of a pack of gum. 3C + 1G= 1.75 2C + 4G=2.00 solve. I know that i have to

asked by Diana on June 10, 2007
95. ## phyics

A dart leaves the barrel of a blowgun at a speed v. The length of the blowgun barrel is L. Assume that the acceleration of the dart in the barrel is uniform. a) Show that the dart moves inside the barrel for a time of 2L/v Express your answer in terms of

asked by sarah on September 20, 2015
96. ## Social Studies

What was the system of economy for the Plateau, Northeast Woodland and Southeast Woodland Indians? Thank you

asked by Scott on September 27, 2007
97. ## History

Do you think that the United States will ever revert to a system where the states are more important than the national government?

asked by Teri on October 24, 2008
98. ## ENGLISH

In the Handmaid's Tale by Margret Atwood, does the Handmaid system actually repopulate the state?

asked by lena on November 12, 2009
99. ## Psychology

What possible insight into our visual system does visual illusions provide? What are perceptual constancies?

asked by Kayden Ryan Smith on November 29, 2007
100. ## 11th grade physics

find the value of 60 joule per minute on a system which has 10 cm,100gm, and 1 minute as fundamental units.

asked by help on November 8, 2010