# 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

92,428 questions, page 649
1. ## chemistry

How could you use a precipitation reaction to separate the following pair of cations: K^+ and Hg2 ^2+? (write the formula and net formula for each reactant)? The answer is Hg2 ^2+ (aq) + 2Cl- (aq) = HgCl2(s) but how do I work it out?

asked by Lydia on October 7, 2012
2. ## Physics

What is the minimum work needed to push a 1075 kg car 230 m up along a 17.5° incline? (a) Ignore friction. (b) Assume the effective coefficient of friction retarding the car is 0.30?

asked by Hope on March 21, 2014

Investors and their wives" is considered sexist because: a. investors may be female. b.not all investors are married. c."investors" refers only to women. d. business documents should not mention people's lives outside work. i think its A

asked by clary on June 12, 2015
4. ## Math

Use the graph below to answer the following question. I'll post the link to the graph below. Find the slope. A. 2 B. -1/2 C. -2 D. 1/2 Honestly I'm horrible at Math so I can't really pick a answer can someone please help me? Please explain to me how to

asked by Amber on April 28, 2015
5. ## Science

Calculate the work done in each of the following situations. a) A horse pulls a wagon with a force of 1200 N and moves it 15 m. b) A cable lifts an elevator 16 m by using a cable with a tension force of 2500 N.

asked by Annie on June 5, 2014
6. ## physics

A skier of mass 65.0 kg is pulled up a slope by a motor-driven cable. How much work is required to pull the skier 57.0 m up a 35° slope (assumed to be frictionless) at a constant speed of 2.0 m/s? J

asked by Anonymous on January 5, 2011
7. ## Physics

A train slows from 25m/s to 14m/s in 5.0s. Calculate the work done on the train....so I calculted the displacement and the force and put them together to get an answer of 5.0 x 10^7J, but my textbook says it should be 1.1 x 10^7J? Am I right, or is the

asked by Alexis on October 14, 2007
8. ## Physics

A student has six textbooks, each with a thickness of 4.8 cm and a weight of 26 N. What is the minimum work the student would have to do to place all the books in a single vertical stack, starting with all the books on the surface of the table?

asked by Anonymous on October 4, 2012
9. ## Calculus 1

On the graph of f(x) = 8*sin(3pi*x), points P and Q are at consecutive lowest and highest points with P occurring before Q. Find the slope of the line which passes through P and Q. Slope = ? I have tried 48/pi and it didn't work

asked by Joshua on January 23, 2014
10. ## Physics

A skier of mass 67.0 kg is pulled up a slope by a motor-driven cable. How much work is required to pull the skier 59 m up a 32° slope (assumed to be frictionless) at a constant speed of 2.0 m/s?

asked by Ben on November 20, 2014
11. ## Math

I need to find the inverse function of f(x)=sqrt(x^2+2x), where x>o This is as far as I got: x=sqrt(y^2+2y) How in the world am I going to isolate for y? Should I complete the square underneath the square root symbol, and then use the quadratic equation?

asked by Anne on January 25, 2011
12. ## math

i have another question as well.. square root of 3x=x-6..thanks i got an answer that doesnt work out os if u could jus help me out on these thx :) I would square both sides first so you have 3x = x^2 - 12x + 36. Then subtract 3 on both sides so you have

asked by joe on January 9, 2007
13. ## Physics

A child who has a mass of 17 kg slides down a slide from a height of 3.3 m. If friction does a non-conservative work of -143 J, what is the speed (in m/s) of the child at the bottom of the slide? The acceleration due to gravity is 9.81 m/s2

asked by Fallon on April 29, 2010
14. ## physics

A constant horizontal force of 20n pulls a wooden block with a mass of 4kg over a distance of 0,8m on a horizontal frictionless surface.calculate the work done by the force.

asked by heron on June 26, 2010
15. ## math

You have several 5x11 rectangles, using only these rectangles, what can you make? A) 39x54 rectangle? B) a 39x55 rectangle? Plz help my parents are at work and sisters are doing homework, I'm 9 help!!! ( math due tomorrow!! )

asked by RIZ on September 11, 2014
16. ## make check

Consider the following. (Give your answers correct to four decimal places.) (a) Determine the level of confidence given the confidence coefficient z(á/2) for z(á/2) = 1.65. Incorrect: Your answer is incorrect. . 0.90 is what I got and it was wrong, I

asked by Tom 84 on June 18, 2013
17. ## PHYSICS DUE SOON

In a running event, a sprinter does 5.5 105 J of work and her internal energy decreases by 8.8 105 J. (a) Determine the heat transferred between her body and surroundings during this event. _____J

asked by Ame on November 29, 2012
18. ## physics

An ideally efficient freezer cools food to 260 K. If the room temperature is 300K, how much work does the freezer consume when removing 100J heat from the food?

asked by garnel on April 8, 2013
19. ## com 215

Discuss how your would approach creating a negative message for a superior ( such as a manager at work or and instructor) versus creating a message for a colleague, subordinate, or fellow student

asked by attivia on October 21, 2007
20. ## physics

A mother pulls her two children on a sled through the snow along a flat street. How much work is done if she pulls her children 100 feet with a constant force of 40 pounds at an angle of 28°?

asked by Gabby on June 6, 2014
21. ## chemistry

The change in internal energy for the combustion of 1.0 mol of octane at a pressure of 1.0 atm is 5084.3kJ. if the change is enthalpy is 5074.1kJ, how much work is done during the combustion?

asked by Anonymous on February 20, 2011
22. ## Physic Help

Charge is uniformly distributed along the x axis with density ß. Use Gauss' Law to find the electric field it produces, and use this to calculate the work done on a charge Q that moves along the y axis from y = a to y = b.

asked by Lindsey on February 18, 2013
23. ## physics help!!!

What is the minimum work needed to push a 900 kg car 460 m up along a 17.5° incline? (a) Ignore friction. (b) Assume the effective coefficient of friction retarding the car is 0.30?

asked by greg on November 17, 2009
24. ## Physics HELP

A student has six textbooks, each with a thickness of 4.0 cm and a weight of 30 N. What is the minimum work the student would have to do to place all the books in a single vertical stack, starting with all the books on the surface of the table?

asked by Kels on October 4, 2011
25. ## physics

On his way off to college, Russell drags his bag 15.0 m from the door of his house to the car at a constant speed with a horizontal force of 95.0 N. How much work does Russell do to overcome the force of friction?

asked by april on February 4, 2009
26. ## indian ridian ridge

Simplify the given expression to rational exponent form and justify each step by identifying the properties of rational exponents used. All work must be shown. 1/cubed root of x to -6 exponent

asked by dylan on March 7, 2015
27. ## physics

A Carnot engine operates between 170°C and 20°C. How much ice can the engine melt from its exhaust after it has done 6.0 104 J of work? i need a step by step process. you don't have to give me the answer.

asked by Nate on September 29, 2010
28. ## Biochem again

Thanks for answering the first one :) Here is another Calculate the amount of sodium acetate and acetic acid necessary to make 100mL of a 0.500 M acetate buffer that is pH 5.2. I believe I have the answer but I want to make sure I did the work correctly.

asked by bugbabe623 on September 11, 2008
29. ## Equilibrium

2 SO2(g) + O2(g) 2SO3(g) Initially, 1.6mol SO3 is placed in a 3.0L container. At equilibrium, [O2] = 0.15M. What is the value of Keq? A. 0.26 B. 1.2 C. 4.0 D. 43 My work: ...2SO2...+...O2......2SO3 I 0.53M.....-----.........----- C

asked by Jessica on November 13, 2014
30. ## math

A real estate agent received a 2.5% commission on the sale of a home. If the home sold for \$259,000, how much was his commission? We will be happy to critique your work or thinking.

asked by veronica on May 7, 2007
31. ## Calculus

A tank in the shape of a right circular cylinder is filled with water (62.5 lb/ft3). It has a height of 8 ft and a diameter of 10 ft. How much work is required to pump all the water to a spout that is 3 ft above the top of the tank?

asked by ANON on July 18, 2016
32. ## Physics

A 51-kg packing crate is pulled with constant speed across a rough floor with a rope that is at an angle of 34.0° above the horizontal. If the tension in the rope is 115 N, how much work is done on the crate to move it 9.7 m

33. ## chemistry

an engine operating between 100 degree celsius and 0 degree celsius takes 453.6 k cal of heat. The usefull work done by it is ? plz teach me the way of calculating it

asked by star on June 3, 2012
34. ## Biology

Hi, I am trying to work out a hypothesis to compare Estrogen receptors in breast cancer cells to normal breast tissues. Am I right in thinking that this will be a hypothesis using "effect" words instead of association ?

asked by Yvonne on April 1, 2017
35. ## Physics Can you please get me started

In a running event, a sprinter does 5.5 105 J of work and her internal energy decreases by 8.8 105 J. Determine the heat transferred between her body and surroundings during this event. ________ J

asked by amela on November 29, 2012
36. ## Physics

A skier of mass 73.5 kg is pulled up a slope by a motor-driven cable. How much work is required to pull the skier 58 m up a 32° slope (assumed to be frictionless) at a constant speed of 2.0 m/s?

asked by Elizabeth on April 11, 2011
37. ## microsoft PP

When planning a presentation, there are several factors you need to consider. Which of the following is one factor you should consider when initially planning your presentation? A. Location of audience B. Title placeholder C. Type of font D. Saving your

asked by Daniela on July 26, 2016
38. ## physics

In a running event, a sprinter does 5.5 105 J of work and her internal energy decreases by 8.8 105 J. Determine the heat transferred between her body and surroundings during this event. ________ J

asked by amela on November 29, 2012
39. ## Social Studies

What Soviet Union leader cut ties with China after a heated discussion with Mao Zedong over Communist ideologies? a. Josef Stalin b. Vladimir Putin c. Mikail Gorbachev d. Nikita Khrushchev*** Just checking my work:) *** - My Answer Thanks, Kaai97

asked by Kaai97 on October 27, 2015
40. ## Social Studies

What triggered China's 1899-1901 Boxer Rebellion? a. A prolonged famine that had killed thousands of Chinese b. The presence of westerners*** c. The imprisonment of university professors d. The government's massacre of a village's peasants Just checking my

asked by Kaai97 on October 27, 2015
41. ## english

Can someone check my work for me, please. 1.Yesterday he was very busy since he had been fixing the TV from noon. 2. He left for the day before I arrived. He had been waiting for me almost a week. To regret, I couldn't come earlier. 3. When Anna entered

asked by maria on December 1, 2013
42. ## English

Which of the following examples best uses a transitional word or phrase to introduce a cause or effect? A: I missed the bus and I was late to work. B: I served pie at the party because I do not like cake

asked by Dakelo-Kun on October 8, 2019
43. ## Physics

A box of mass m and initial speed v0 slides distance d across a horizontal floor before coming to rest. Use work and energy to find an expression for the coefficient of kinetic friction.Express your answer in terms of the variables v0, d, and free fall

asked by Dib on November 8, 2014
44. ## English

Okay, this is the work I have done so far. I need to know whether I'm doing this correctly or not. Please tell me wheather they are correct or not. 1. Who is that man? 2. Who made the first moon landing? 3. Whom did the instructor invite to speak to the

asked by Larry on November 18, 2008
45. ## vocabulary

Select the letter of the answer that gives the correct meaning of the underlined word, based on its context. After years of frustration, the social worker began to feel that her work to eliminate homelessness was a (visionary) task. A. noble B. superficial

asked by anthony on May 16, 2011
46. ## Geography

Employment opportunities were limited in Tijuana. Manuel, who had been unemployed for several months, decided to join a group of people traveling north to find work. What concept is described by the paragraph above? a)population growth b)urbanization

asked by george on December 15, 2009
47. ## Spanish

Which theory was developed based on observations made on the Galapagos Islands? a. big bang b. natural selection*** c. relativity d. planetary motion Where is the best place to put the adjective "perezoso" in the following sentence? Diego(1) es(2) un(3)

asked by Kaai97 on October 9, 2015
48. ## world geography

Employment opportunities were limited in Tijuana. Manuel, who had been unemployed for several months, decided to join a group of people traveling north to find work. What concept is described by the paragraph above? a)population growth b)urbanization

asked by ty washington on October 27, 2014
49. ## physics

Using the inverse-square gravitational law, calculate the work required to lift a 1000-kg satellite from the earth's surface to an altitude of 100 mi and inject it into orbit at 17,500 mph. How long would a 300-hp engine have to be run to produce this much

asked by paul smith on July 10, 2011
50. ## Math,Science,Algebra,Geography

the personality type theory that gives people codes based on their levels of four traits, including sensing-intuition or making of thinking-feeling is called the? A.)Holland Code B.)Myers-briggs C.)Beblin Roles D.)Team Work Profiles

asked by DJ on September 30, 2015
51. ## English

11. From which of the following lines can readers infer that Marge Piercy, the poet who wrote "To Be of Use," views hard work as an activity that is worthwhile? A. "the black sleek heads if seals" B. "bouncing like half-submerged balls" C. "who do what has

asked by Dude on May 23, 2017
52. ## Geography

Employment opportunities were limited in Tijuana. Manuel, who had been unemployed for several months, decided to join a group of people traveling north to find work. What concept is described by the paragraph above? A)population growth B)urbanization

asked by george on December 15, 2009
53. ## college stats

in a sample of 159,949 first year college students, the national survey of student engagement reported that 39% participated in community service or volunteer work.find the margin of error for 99% confidence. what formula do I use? I know the 99% interval

asked by hershi on December 5, 2013
54. ## Check my work

Peter is creative and excels with visual presentation. He enjoys working in small groups and in an active work environment. Which jobs would match his personality? Select two that apply a. Business manager**** b. Chef c. Painter d. Waiter e. Software

asked by Sid.V on September 18, 2018
55. ## Chemistry

A balloon filled with 0.01 mol of hydrogen gas is kept constant at 25 degrees Celsius. If the pressure is increased from 1atm to 1.5atm, what is the resulting volume? _______________________________________ C3H8(g) + 5 O2(g)-->3 CO2(g) + 4 H2O(g) A 0.03

asked by Muffin on December 21, 2006
56. ## History

1. Which answer best explains how the Articles of Confederation addressed the question of creating a court system? The Articles established the trial-by-jury system for the first time in history. The Articles created state, regional, and national courts

57. ## Chemistry

A) A compound distributes between water (solvent 1) and benzene (solvent 2) with Kp = 2.7. If 1.0g of the compound were dissolved in 100mL of water, how much compound could be extracted by three 10-mL portions of benzene? B) If the value of Kp is 0.5 for

asked by Anonymous on July 18, 2012
58. ## COM/155

Use at least five adverbs and five adjectives to write a brief review of a movie, sporting event, musical performance, or television show. I wrote my movie review but im really confused on which ones are adjectives and which ones are adverbs. could you

asked by Stephanie on February 20, 2011
59. ## algebra

a disk jockey must play 14 commercial spots during one hour of radio show, each commercial is eiter 30 seconds or 60 seconds long. If the total commercial time during one hour is 11 minutes, then ow many 30 second commercials were played that hour?

asked by Anonymous on May 9, 2011
60. ## math

andre wants to figur out his resting heart rate. he counted 7 heart beats in 6 secconds part A show the data as a fraction part B using the rate from part A calculate andres rate of heartbeats per minute

asked by marquis on March 19, 2008
61. ## Math

An airline believes that the probability of a passenger being a no-show on a morning flight is 12%. If the airline overbooks a 300 seat morning flight by selling 350 tickets how many empty seats should the airline expect to have on the flight

asked by Nancy on September 7, 2016
62. ## Physical science

The engine of a car is being lifted out of the car by using a pulley system. The weight of the engine is 8000N. Use a scale diagram to determine the horizontal force, F1 that a mechanic has to use to hold the engine in such a position that the rope makes

asked by Pamela on March 7, 2012
63. ## Statistics

the average length of time for students to register for fall classes at a certain college has been 50 minutes. a new registration procedure using modern computing machine is being tried. if a random sample of 12 students had an average registration time of

asked by Jacy on March 10, 2011
64. ## value

show that the sum of nterm of the progression is logx,logx^2,logx^3,logx^4---is n(n+1)/2 logx

asked by value on February 20, 2017
65. ## mathematical physics

Show that the angular momentum vector(L)=vector(r)×vector(p) vector is an axial vector

asked by gourav on March 21, 2015
66. ## chemistry

95.0mLmL of H2O\rm H_2O is initially at room temperature (22.0∘C\rm{} ^{\circ}C). A chilled steel rod at 2.0∘C\rm ^{\circ}C is placed in the water. If the final temperature of the system is 21.3∘C^{\circ}C, what is the mass of the steel bar? Specific

asked by Anna on March 11, 2014
67. ## algebra

Why does the inequality sign change when both sides are multiplied or divided by a negative number? Does this happen with equations? Explain why or why not? Write an inequality for your classmates to solve. In your inequality, use both the multiplication

68. ## Physics

A 500g block is shot up a 25degree incline with an initial speed of 200cm/s. Determine the distance, d, that it will go up the incline if the coefficient of kinetic friction between it and the incline is 0.150? Use Entergy considerations to solve the

asked by Anonymous on May 2, 2013
69. ## math

Plz solve this problem.. A wire of 100 cm is cut into two parts and each part is bent to form square.if the sum of the areas of two squares is 425 cm square.find the length of side of two square.

asked by Ali on January 21, 2016
70. ## American History

1.What was the central conflict between Native American groups and the United States, and how did their goals differ? 2. (a)What attempts were made to solve the conflict, and what circumstances usually caused the efforts to fail? (b)What other solutions to

asked by Kelsey on October 17, 2013
71. ## algebra

i dont do the solutions very well could someone help me? how many real number solutions does the equation have? 0=2x^2-20x+50 A. 1 solution B. 2 solutions C. no solutions D. infinite solutions Is it C? Also if anyone has the rest of the answers to Unit 4

asked by avg joe who didnt go on April 29, 2019
72. ## chemistry

25 milliliters of tartaric acid solution is titrated against 31 milliliters of NH4OH. What is the normality of the NH4OH?

asked by Stephen on October 3, 2012
73. ## Biology

What is pesticide resistance? Why is it that biological control is a good solution to the problem of pesticide resistance?

asked by Elizabeth on January 27, 2016
74. ## chemistry

how many grams of copper is displaced from copper sulphate solution by adding 27 grams of aluminium

asked by amish on June 27, 2013
75. ## Chemistry

How many grams of a 17.7% potassium sulfate solution would contain 419.9 g potassium sulfate? Answer in units of g

asked by Kristen on March 13, 2014
76. ## Algebra 2

6. Which of these points would be in the solution set of y < 2x – 5? The points would be in the shaded region of the graph: (2, -1) (7, 100) (100, 7) (0 , 0)

asked by Danielle on September 24, 2007
77. ## CHEMISTRY HELP!

Calculate [Cu2+] in a 0.10 M CuSO4 (aq) solution that is also 6.4 M in free NH3 . Cu2+(aq) + 4NH3(aq) --->[Cu(NH3)4]2+ (aq) kf = 1.1 x 10^13

asked by Leslie on March 2, 2013
78. ## chemistry

Tell how you would prepare an acetic acid/acetate buffer solution having apH of 3.79. Ka for acetic acid = 1.85 x 10-5

asked by jenn on December 1, 2016
79. ## chemistry

The concentration of ammonium phosphate, (NH4)3PO4, is 1.60 M. What is the concentration of ammonium ions in solution?

asked by Anonymous on December 11, 2012
80. ## Chem

(c) Using the appropriate Ksp value from Appendix D, calculate the solubility of Cu(OH)2 in grams per liter of solution. Appendix D: Ksp for Cu(OH)2 = 4.8 x 10-20 thanks!

asked by Rebekah on April 27, 2011
81. ## Math

The point (2, 3) is on the graph of y f(x). Determine the corresponding coordinates of this point on the graph of y= 2(f(2(x + 5) 4. Please include a full solution! A: (1,3),(1,6), (1,-6), (-4,-6), (-4,-10)

asked by Ella C. on September 13, 2017
82. ## Chemistry

What is the molal concentration,m,of tin in a solution of 5.000grams of tin dissolved 95.000grams of copper

asked by Ruffles on December 4, 2013
83. ## Elementary manth

Jose said that the square root -X=3 has no solutino since the square root is a negative, is this true. I think it does has a solution

asked by Molly on November 5, 2014
84. ## chemistry

What is the [CH3NH3+] of a solution which is 0.1003 M in CH3NH2 and 0.1204 M in CsOH? CH3NH2(aq) + H2O(l) « CH3NH3+(aq) + OH−(aq)

asked by Andy on May 6, 2014
85. ## Science

49gm of sulphuric acid is present in 100ml aq. Solution .What is the molarity of sulphuric acid?

asked by Kriti on July 7, 2017
86. ## Chemistry

if u add if you add 2.0 ml of 10.0 M HCl to 500 ml of a .10 M NH3, what is the pH of the resulting solution? for NH3, kb=1.8X10^-5

asked by Kate on February 13, 2011
87. ## Chemistry

Determinne the amount of Dextrose and NaCl in 500ml of 5% DNS. (The solution is 5% in regards to dextrose and 0.9% in regards to NACl.)

asked by Sonya on March 14, 2011
88. ## Chemistry

0.1 M solution of HCL has been diluted by a factor of 10. The Corresponding concentrations of: [OH^-] increased or decreased [H^+] increased or decreased

asked by Jon on October 9, 2011
89. ## chem

how many 0.5 g tablets of aluminum acetate would you need in order to make 750 ml of 10% aluminum acetate solution?

asked by Harley on February 2, 2011
90. ## chemistry

A 30.0 mL sample of phosphoric acid is titrated with 18.0 mL of 3.0 M NaOH solution. What is the molarity of the phosphoric acid?

asked by confused on December 7, 2011
91. ## Algebra

Each ordered pair is a solution of a direct variation. Write the equation of direct variation. (2,10) (8,2) (7,21) (2,-16) Please Help!

asked by Caitlyn on December 2, 2010
92. ## Chemistry ....help

If NaNO3 is cooled from 70C to 10C ; how much solid NaNO3 will come out of solution as a solid salt? Help me !!!

asked by Maria on March 18, 2013
93. ## Chemistry-confused

What is the molarity of a 15%(w/v) solution of nickel (III) ferrocyanide? I can't figure out what nickel(III) ferrocynade is?

asked by Beth on November 30, 2010
94. ## Chemistry

How many mL of a stock solution of 2M potassium nitrate would you need to prepare 100mL of .150 M potassium nitrate?

asked by Lis on May 16, 2012
95. ## algebra

how many real number solutions does the equation have? 0=2x^2-20x+50 A. 1 solution B. 2 solutions C. no solutions** D. infinite solutions

asked by zzz on April 29, 2019
96. ## Math

A biology class has 12 boys and 18 girls .what fraction of the class are boys? Solution. 12/30=2/5 Please tell me this correct or not.

asked by ABC on May 24, 2017
97. ## chemistry

You need to make a 300 ml of a .37M Na2 SO4 solution. How much Na2 So4 should you weigh out?

asked by mika on July 3, 2016
98. ## chemistry

What is the pH of the solution created by combining 12.00 mL of the 0.10 M base with 8.00 mL of the 0.10 M acid base acid NaOH HC2H3O2

asked by tia on April 9, 2008
99. ## Algebra 2

Find the A) Constant of Variation, B) the Equation of the Variation, and the C) the Solution Y varies directly with x. If y = -4 when x = 2, find y when x = 6.

asked by Nate on February 15, 2018
100. ## s

, what would be the pH of a solution of 0.1 M acetic acid and 1 M sodium acetate if the pKa for acetic acid is assumed to be 4.74?

asked by Anonymous on January 23, 2016