# 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 540
1. ## Mathbio in 12th science

When particle revolves with uniform speed on a circular path a)no force act on it b)no excellaration acts on it c)no work is done on it d)its velocity is constant answer this mcq

asked by Harsha on October 18, 2012
2. ## social studies

How are interest rates and wages similar? A. Both rise due to inflation. B. both are types of prices. C. Both relate to the cost of borrowing. D. Both are payment for work done. i feel like it is D or b?

asked by Jo on September 7, 2016
3. ## Biology

Why is the Hardy-Weinberg Theorem useful for studying evolutionary change? What are the assumptions of this model? How does it work (in other words, describe the procedure which is used and how you figure out genotype frequencies)?

asked by Sarah on October 8, 2015
4. ## Business

I need at least two or three examples as to how outsourcing project work can help alleviate some of the common problems associated with multiproject resource scheduling. Any help will be appreciated. This is the only part of the entire assignment that is

asked by Kara on October 19, 2006
5. ## physics

Imagine that two people having equal weights climb the same flight of stairs. One runs and the other walks. Do they do the same number of Calories of work? Do they have the same power output? Explain.

asked by anonymous on February 3, 2009
6. ## Chemistry

what mass of nitrogen dioxide (8NO2) will form by reaction of 3.50 mole of perchloric acid (13HClO4) with excess methylamine (8CH3NH2)? Answer is 99.1 g. How do you work this?

asked by Michelle on November 6, 2012
7. ## Math for liberal arts

A single 6-sided die is rolled twice. C. Find the odds in favor of getting 2 numbers whose sum is greater than 5. I would simply like to be shown the steps to work this problem.

asked by KeKe on September 16, 2012
8. ## sociol studies

Which of the following describes the early spread of Islam. A.Arab military conquest B. missionary work in Persia C.Mesopotamian trade**** d. greek and roman expansion.

asked by nerdalert on January 17, 2017
9. ## chemistry

How much work is done when 2.0 liters of CH4(g) undergoes combustion in excess oxygen at 0 degrees Celsius and 1.00 bar (assuming the volume of water formed is negligible)?

asked by Anonymous on February 9, 2015
10. ## social studies. NEED HELP ASAP

How does Islam most affect women in public life in Arabia? A. by keeping them from work B. by barring them from the vote *** C. by restricting their appearance D. by outlawing interaction with all men

asked by Talea on March 6, 2015
11. ## letter

John has demostrated the ability to work under pressure in the prescence of tight deadlines and demanding workload. I am writing a reference letter, how can I make this sentence better?

asked by Johnson C. on October 30, 2012
12. ## chemistry

70.9nm light strikes a metal wiyh a work functon of 5.10ev what is the maximum kinetic energy of the ejected electronev what is the stopping potential

asked by pravallika on September 25, 2018
13. ## us hist

You have many skills, a broad variety of work experiences and a college degree. Do you favor the Pendleton Act? Only in the eastern industrial regions Only in the southern states Yes No I know its not no. is it yes or..

asked by jay on May 15, 2014
14. ## math-- one question

Suppose we know that we need \$36,000 of realized income each year to cover all of our expenses. What is the minimum amount we should make per hour if we know we can work at a job at least 38 hours per week.

asked by Anonymous on May 24, 2018
15. ## Mathbio in 12th science

When particle revolves with uniform speed on a circular path a)no force act on it b)no excellaration acts on it c)no work is done on it d)its velocity is constant answer this mcq

asked by Harsha on October 18, 2012
16. ## English

What rhetorical device(s) is this At first, such jobs may seem right out of the Founding Fathers’ education manual for how to bring up self-reliant, work-ethic-driven, productive young- sters.

asked by Hard on February 19, 2019
17. ## to ms.sue or wrieacher

today we are coming up with 5 fractions that has 3 different prime numbers. will 56/84, 93/99, 45/65, 73/64, or 84/92 work. which one? P.S- can you be my private tutor? If you say yes, can we you help me every Fridays at 4:00. If Im not online on Friday at

asked by Celest on March 21, 2012
18. ## psychology

Please note that we don't do students' homework for them. Our tutors try to give you the information to help you complete your assignment on your own. Once YOU have come up with a response to YOUR questions, please re-post and let us know what you think.

asked by Writeacher on March 1, 2007
19. ## physics

In the past, ships often carried small cannons that wer used when approaching shore in a dense fog to estimate the distance to the hidden land. How would this work?

asked by tiffany on October 15, 2012
20. ## Chemistry

How high can a person (assume a weight of 70 kg) climb on one ounce of chocolate if the heat of combustion (628 kJ) can be converted completely into work associated with vertical displacement?

asked by Joesph on September 28, 2016
21. ## social studies

how does islam most affect women in public life in arabia? A.by keeping them from work B.by barring them from the vote C.by restricting their appearance D.by outlawing interaction with all men

asked by Hannah on February 25, 2015
22. ## critical thinking

how do assumptions relate to the process of critical thinking? Please note that we don't do students' homework for them. Once you have come up with a response to these questions, please re-post and let us know what you think. Then someone here will be

asked by kk on January 14, 2007
23. ## math

461,592 x 308 _________ 3592736 + 13947760 ___________ 142,070,336 What is the first number that is incorrect in the work above? Please answer and explain.

asked by Anonymous on January 29, 2013
24. ## English

At first, such jobs may seem right out of the Founding Fathers’ education manual for how to bring up self-reliant, work-ethic-driven, productive young- sters. Is this a parallel sentence?

asked by Hard on February 19, 2019
25. ## Physics

A 45.4 kg of beer rolls down a 3.05 m long plank leading from the flatbed of a truck 0.880 m above the ground. Determine the amount of work (in Joules) done on the keg by gravity.

asked by Hau on November 1, 2012
26. ## planning & implementing for the environment

Purchasing equipment that has multiple uses can A. be more accessible to the children. B.make less work for staff. C.cut costs and encourage creative play. D.be easier to find. C

asked by Amanda on October 20, 2014
27. ## Social Issues

Another professional mandate to work with families is offered in A) most colleges of education B) the Code of Ethics C) the handbook of most programs D) the Family Medical Leave Act

asked by finial help on May 2, 2011
28. ## physics

A beautiful man with a large nose named Melvin lifts a 28.1 kg bucket from a well anddoes 4.24 kJ of work. The acceleration of gravity is 9.8 m/s2 . How deep is the well? Answer in units of m

asked by lynn on October 26, 2011
29. ## Math

(2 questions) Factor each expressions 1) 2c + 2d - cd - d^2 2) abd - abe + acd -ace First rearrange: 2c - cd + 2d - d^2 = c(2-d)+d(2-d)= (2-d)(c+d). The second one is done using the same kind of procedure. Post your work and tell us what you don't

asked by beth on October 25, 2006
30. ## 8th grade physics

1. if you double the distance over which a force moves an object,the work will be multiplied by?? 2.if emily doubles her velocity.her kinetic energy will be? 3.the unit joule is equivalent to?

asked by Jana on April 16, 2010
31. ## geography..please check my answers!!!

which pair of basic questions guides geographers in their work? where are things located? and Why are they there? **** What is the climate? and Why was it changed? When did Earth form? and What is it made of? Who lived where? and When did they move?

asked by lilly on October 26, 2015
32. ## math

Dick hires a new employee to work in the bakeshop. In one hour he burned 55 coojies. If this repeesented 15% of the days production how many cookies did you plan on producing that day?

asked by jeni on December 5, 2016
33. ## Economices

A lightning technician's work on a movie shoot ends in a week. what type of unemployment will she experience at that time? A frictional B structural C casual D cyclical

asked by Mr. Elstupido on May 3, 2017
34. ## physics

A ball of mass 1kg is thrown upwards and reaches a maximum height of 4m.Calculate the work done by the force of gravity during vertical displacement.Take g=10m/s

asked by Anonymous on October 30, 2011
35. ## english

what is the main connotation of hard work in Marge Piercy's poem To Be of Use? a. struggle and exhaustion b. dignity and gratification c. simplicity and usefulness d. exploitation and rebellion

asked by yEEt on May 22, 2019
36. ## physics

Which of these pairs of objects has the smallest number of powers of ten difference in their sizes? Select one: a. Earth's moon's diameter and Earth diameter b. Diameter of Earth and diameter of the solar system c. Proton and a carbon atom d. Star diameter

asked by may on May 7, 2019
37. ## physics

A woman with mass 50.0kg is standing on the rim of a large disk that is rotating at 0.500rev/s about an axis perpendicular to it through its center. The disk has a mass of 110kg and a radius of 4.00m. Calculate the magnitude of the total angular momentum

asked by Erin on April 12, 2008
38. ## physics help please!!**

A typical GPS (Global Positioning System) satellite orbits at an altitude of 4.0 107 m. (Astronomical data needed for this problem can be found on the inside back cover of the text.) (a) Find the orbital period of such a satellite. hours (b) Find the

asked by kelsey on October 30, 2008
39. ## Chem

What is the pH of a 0.115 mol/L solution of sodium acetate, CH3COONa, at 25oC? (pKa=4.74 at 25oC for CH3COOH.)

asked by M on April 3, 2016
40. ## Chem

The molecular weight of CaCl2 is 110.98 g/mol. In order to make up 500.0 ml of a 0.500 M solution, you need how many g?

asked by Danny on July 26, 2012
41. ## math

Calculate the mass percent ({\rm m}/{\rm m}) for the solute in each of the following solutions: 95g of {\rm NaOH} in 365g of {\rm NaOH} solution

asked by hayleyg on October 24, 2012
42. ## chemestry

Calculate the pH of a solution obtained dissolving 10 g of NH3 and 15 g of NH4Cl in 300 ml of water (Kb NH3 = 1.8 x10-5).

asked by Anonymous on June 19, 2016
43. ## Chemistry

A solution containing equal masses of glycerol, C3H8O3, and water has a density of 1.10 g/mL. Calculate the molality of glycerol. I got 11.9 m.

asked by Student on February 14, 2016
44. ## Chemistry

What mass ( g ) of the solvent chloroform that should be added with 5287 mL of the solute hexane to produce a solution that is 7.11 m hexane.

asked by Anonymous on March 2, 2010
45. ## more chemistry

What volume of 0.115 M M HClO 4 \rm HClO_4 solution is needed to neutralize 58.00mL mL of 8.75×10−2 M M NaOH \rm NaOH

asked by Anonymous on September 29, 2013
46. ## Chemistry

A 0.5 molal urea solution causes freezing point depression of two degrees .what is the molal delression constant ????

asked by Prithvi on May 2, 2014
47. ## chemistry

Calculate the pH of a solution obtained dissolving 10 g of NH3 and 15 g of NH4Cl in 300 ml of water (Kb NH3 = 1.8 x10-5)

asked by Anonymous on July 5, 2016
48. ## health science chemistry

How many ml of water should be added to 20.0 ml of a stock of 12.0 M HCl solution to make 1.50 M HCl ?assume that the volumes are additive.

asked by konja on May 4, 2016
49. ## chemistry

A 20.0 mL sample of 0.687 M HBr is titrated with a 0.216 M NaOH solution. The pH after the addition of 10.0 mL of NaOH is __________.

asked by katie on July 24, 2012
50. ## CHemistry

What is the pH of the resulting solution when 0.20 mole of NaF and 0.05 mole HCl are added to 100 mL water? The Ka for HF is 3.95x10^-4M

asked by Mike on March 1, 2015
51. ## Chemistry

Making a solution at 100•C What would be the smallest volume of water needed to dissolve 12.0g of KNO3 at 100•C

asked by Shelly on September 16, 2017
52. ## Chemistry

calculate the molar solubility of BaCO3 in a 0.10M solution of NaCo3 (aq). (ksp(BaCO3)=8.1x10^-9)

asked by Kia on November 27, 2015
53. ## Chemisty!

what are the molarities of Mb^2+ ions and Cl- ions in an aqueous solution of 4.00% by the mass magnesium chloride, with a density of 1.15g mL-1?

asked by Wade on December 14, 2010
54. ## Chemistry

Calculate the pH after 0.13 mol of NaOH is added to 1.00 L of the solution that is 0.57 M HF and 1.13 M KF. I got the answer of 3.66 to 3 sig figs, but it's wrong. Can you please tell me what I did wrong? -Thanks

asked by Katrina on March 27, 2011
55. ## chemistry

does the ph change and how much difference is there (double, triple, same or half) for a solution of 0.1M NaHCO3 vs 0.2M NaHCO3 (volume constant)? Kb not known?

asked by Larry on April 13, 2010
56. ## chemistry

Describe how you would make 500.0mL of a 0.200M NaOH solution from a 15.0 stock NaOH conentration

asked by Monique on November 6, 2011
57. ## Chemistry

Calculate the molarity of the H3PO4 solution?This the question Answer has to be: MH3PO4 = ? mol/L but I don't know how to calculate it. Thanks for help so far

asked by Duke on October 26, 2014
58. ## College Algebra

Classify the equation as a conditional equation, an identity, or a contradiction and then state the solution. 24a+14=6(8a+3)-26a+4

asked by Anonymous on September 2, 2017
59. ## chemistry

I need 500 ml of 0.10 m HCL solution. I have a 3.785 liter container of HCL at 31.45% concentration. How do I acheive my objective?

asked by Daniel on October 16, 2010
60. ## chemistry

Calculate the air concentration (mol/l) of phenol in equilibrium with solution including 100 g/m3 of phenol.(T=20 C)

asked by Osama on October 7, 2014
61. ## Chemistry

Why is it important to keep the NaOH solution (being used during titration) stoppered at all times when it is not in use? And why is it all right to use a wet flask for a titration experiment?

asked by Cassie on March 26, 2011
62. ## chemistry

Consider the titration of 88.0 mL of 0.150 M Ba(OH)2 by 0.600 M HCl. Calculate the pH of the resulting solution after the following volumes of HCl have been added. 0.0 ml 12 ml 31 ml 44 ml 88 ml

asked by Sarah on March 28, 2011
63. ## chem

What should you mix with trisodium citrate to prepare a buffer solution, a strong acid or a strong base?

asked by Anthony on February 7, 2008
64. ## Quantatative Analysis

"what volume of .50 m h2so4 must be added to 65 ml of .20 m h2so4 to give a final solution of .35 M? assume volumes are additive"

asked by Stumped on October 29, 2011
65. ## Chemistry

A current of 5.61 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 9.00 g of nickel?

asked by Anon on March 29, 2013
66. ## Chemistry

If 56 mL of 1.93 M hydrochloric acid is mixed with water to create a solution with a concentration of 0.9 M , how many liters of water were added?

asked by Mikay on May 31, 2014
67. ## chemistry

calculate the value of water that is needed to dissolve 1.11 g of CaCl2 in order to prepare a 0.0250 M CaCl2 solution?

asked by shanta on July 15, 2008
68. ## Chemistry

A current of 3.94 A is pass through a Pb(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 5.40 g of lead?

asked by Brianna on July 24, 2013
69. ## Chemistry 12

In s 0.30 mol/L HNO3(aq) solution. a) what is the concentration of nitric acid molecules. b)what is the hydroxide ion concentration?

asked by JM on April 1, 2011
70. ## Chemistry

A .1M solution of chloroacetic acid is 11% ionized. Using this information, calculate [ClH2COO-], {H+], [ClCH2COOH] and Ka for cloroacetic acid.

asked by Kaylin on March 17, 2013
71. ## chemistry

what volume of 0.150M Li2Sr solution is required to completely react with 130ml of 0.150M Co(NO3)2

asked by Jake on October 17, 2014
72. ## chemistry

A solution which contains 40.3 g of an unknown molecular compound in 360 g of water freezes at -5.07°C. What is the molar mass of the unknown?

asked by paul on November 26, 2012
73. ## Maths

How many moles of NaOH can be added to 1L solution 0.1M in NH3 and 0.1 M in NH4Cl without changing the POH by more than 1 unit kb NH3 = 1.8 into 10^_5

asked by Kkk on December 12, 2016
74. ## Algebra

i tried to figure out if 5/3 would be a solution for 6x^2-11x-35=0. i got -0.21 on the left side. is this close enough to 0 that it would count because my book said it was indeed equal to the right side.

asked by Aliviah on September 27, 2009
75. ## 12 chemistry

What is the average ion concentration in a 7.9 mL saturated solution of calcium hydroxide containing calcium chloride (CaCl2)?

asked by Erica on April 24, 2007
76. ## chem

A weak acid, HA, has an ionization constant of 9.29 x 10-6. If we prepare a solution that is 0.727 M in HA what percent of the acid will be ionized?

asked by jess on November 30, 2014
77. ## Chemistry

How many moles of benzoic acid, a monoprotic acid with Ka=6.4×10^-5, must dissolve in 250mL of H2O to produce a solution with pH=2.04

asked by Khadijah on April 3, 2017
78. ## Chemistry

Predict the products of the electrolysis of a solution of aqueous MnSO4 given the following choices: a. H2SO3 (aq) b. O2 (g) c. H2 (g) d. OH- (aq) e. Mn (s) f. e- g. H+ (aq) how is the answer O2 and H2SO3?

asked by Sara on June 16, 2015
79. ## chemistry

what volume of a 0.272 M solution of HBr is needed for a reaction that requires 49.5 g of HBr? Answer in units of L.

asked by Anonymous on September 12, 2011
80. ## chemistry

What is the percent by mass concentration of KCl in a solution prepared by adding 80.0 g KCl to 200.0 g of water?

asked by Pressila on September 27, 2010
81. ## chemistry

When KI is dissolved in water, the solution will be ___. a) Strongly Acidic b) Slightly Acidic c) Neutral d) Basic

asked by Anonymous on July 19, 2010
82. ## Chemistry

For the reaction: Pb(NO3)2(aq) + 2KCl(aq)->PbCl2(s) + 2KNO3(aq) How many grams of PbCl2 will be formed from 63.0 mL of a 1.60 M KCl solution?

asked by Terri on June 22, 2016
83. ## Chemistry

A current of 5.41 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 7.30 g of nickel?

asked by At Least I Am Persistent. on April 2, 2014
84. ## Chemistry AP

Calculate the pH of a 0.44 M aqueous solution of NH4Cl. Kb = 1.8 × 10−5 . I've tried used the Ka=Kw/Kb equation then used the resulting 5.5e-10 in Kw=([H+][Cl-])/[NH4Cl] , using that to get the [H+], but it isn't correct and I don't know what else to

asked by Ethan on February 5, 2015
85. ## Chemistry

Calculate the mass of sugar, C12H22O11, in 280.4 mL of a 1.49 M solution of sugar. (atomic weights: C = 12.01, H = 1.008, O = 16.00)

asked by Abby on November 3, 2014
86. ## chemistry

calculate the mass in grams of copper that will be deposited by dissolving 6.5g of zinc in copper tetraoxosulphate(vi)solution

asked by kabiru ali on November 4, 2015
87. ## chemistry

When KI is dissolved in water, the solution will be ___. a) Strongly Acidic b) Slightly Acidic c) Neutral d) Basic

asked by Anonymous on July 19, 2010
88. ## Chemistry

How many grams of Calcium Nitride can be produced using the calcium contained in 100 ml of a 4 Molar beryllium solution?

asked by momo on April 15, 2012
89. ## chemistry

the molar solubility of PbS, in a 0.150 M ammonium sulfide (NH4)2S solution is? The Ksp for PbS= 3.2E-28.

asked by Tara on December 15, 2010
90. ## chemistry

If 5.6 grams of potassium hydroxide is added to enough water to make 950 ml of solution, what is the concentration of the potassium?

asked by gary on June 1, 2014
91. ## science

what type of solution is formed when steam from boiling water evaporates into the air?Explain.please explain

asked by Anonymous on October 15, 2009
92. ## Chemistry

Solution of 50g AgNO3 is mixed with 50g NaCl. a) What mass of AgCl will you get? b) which substance is in redundancy?

asked by Anonymous on February 6, 2013
93. ## Chemistry

The pH of 0.40 M HF(aq) is 1.93. Calculate the change in pH when 0.301 g of sodium fluoride is added to 53.7 mL of the solution. Ignore any change in volume.

asked by Sara on June 14, 2013
94. ## Chemistry

What must be the molarity of an acetic acid solution if it has the same percent ionization as 0.150M HC3H5O2 propionic acid,Ka=1.3*10^-5 )?

asked by Tiana on February 16, 2012
95. ## Chemistry

If 45.8 grams of MgO are dissolved in 205 grams of water, what is the concentration of the solution in percent by mass?

asked by ilyrae on March 21, 2011
96. ## chemistry

What reagent is commonly used for alcohol oxidation? a. Na2Cr2O7 b.Benedict's Solution c.H2SO4 d. Tollen's Reagent

asked by paul on March 29, 2018
97. ## chem

A weak acid, HA, has an ionization constant of 4.34 x 10-8. If we prepare a solution that is 0.273 M in HA what percent of the acid will be ionized

asked by Anonymous on December 5, 2013
98. ## Math

The equation x^2+12x=73 has two solutions. The positive solution has the form (sqrta)-(b) for positive natural numbers a and b. What is a+b? Thanks

asked by Linda on April 7, 2016
99. ## math

what is the concentration of a sugar solution that contains 8g sugar dissolved in 500 ml water? answer in the form of a ratio

asked by cheryl on November 20, 2011
100. ## chemistry

A 25.0 mL solution of HCl has been spilt. It took 21.8 mL of saturated 2.5 M NaOH to neutralise the acid. What was the molar concentration of the acid?

asked by sarah on August 7, 2013