# 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 96
1. ## Science

Maria and Sam are studying about cells, tissues, organs, and organ systems in the human body. This is a picture of the human digestive system. Each part is a different color. Each part does something different during the process of digestion. Even though

asked by Anvil on October 14, 2019
2. ## EnglishCheck

Many complain about health care reforms and envy neighboring countries like Canada on their single-payer system. Nonetheless, the universal healthcare system may have many cost effective benefits for everyone, but who wants reduced prices at the stake of

asked by HM on November 4, 2011
3. ## Algebra

Given a line containing the points(1,4), (2,7) and (3,10) determine that slope-intercept form of the equation, provide one additional point on this line, and graph the funtion. Start by putting the first point into point-slope form: y-y1=m(x-x1), so

asked by delmore on January 7, 2007
4. ## Quantitative methods

Missouri Mineral Products (MMP) purchases two unprocessed ores from Bolivia Mining, which it uses in the production of various compounds. Its current needs are for 800 pounds of copper, 600 pounds of zinc, and 500 pounds of iron. The amount of each mineral

asked by Anonymous on August 20, 2012
5. ## physics

A 1580 kg car is traveling with a speed of 15.0 m/s. What is the magnitude of the horizontal net force that is required to bring the car to a halt in a distance of 50.0 m? Calculate the kinetic energy: E_{k} = 1/2 m v^2 Then use that The work performed by

asked by tom on November 13, 2006
6. ## chemistry

How much of a 100mM solution do I need to add to a 2.5mM solution to make a solution with a final concentration of 10nM? Is there a formula for this? Please HELP!

asked by lisa on October 21, 2010
7. ## Chemistry

A solution is made by dissolving 18.9 g of HCl in enough water to make 716 mL of solution. Calculate the pH of the solution at 25 degrees C

asked by Kristen on December 5, 2012
8. ## Chem

Water is added to 25 ml of a .911 M KNO3 solution until the volume of solution is exactly 500ml. What is the concentration of the final solution.

asked by Jen on October 10, 2010
9. ## UNAM

if you add 15.ml of a 0.250M HCl solution to 50.0ml of a 0.125 MHCl solution what will be the molarity of the resulting solution

asked by Lelo on September 5, 2015
10. ## Chemistry

A solution is made by dissolving 18.9 g of HCl in enough water to make 716 mL of solution. Calculate the pH of the solution at 25 degrees C

asked by Kristen on December 5, 2012
11. ## chemistry

calculate the volume of mL of a 1.420 M NaOH solution required to titrate the following solution. 25.00 mL of a 1.500 M H3PO4 solution

asked by TROUBLED on October 11, 2011
12. ## Survey of the sciences

When the hydronium ion comcentration of a solution equals 1 mole per liter, what is the pH of the solution? Is the solution acidic or basic?

asked by Stephanie on February 9, 2011
13. ## Inorganic Chem

If you forget to add phenolphthalein solution to a vinegar solution(after adding NaOH solution), how might you salvage the titration?

asked by Robert on April 13, 2011
14. ## Chem

A solution is prepared by adding of KOH to 1 liter of water. The resulting solution has an [OH] of 1*10 to the negative 3. What would be the pOH of this solution?

asked by Carla M on April 28, 2011
15. ## Chemistry

A particular household ammonia solution ( = 0.97 ) is 6.8% by mass.How many milliliters of this solution should be diluted with water to produce 650 of a solution with = 11.60?

asked by MMmm on February 23, 2009
16. ## chemistry

What is the concentration of ammonia in a solution if 24.20 mL of a 0.1140 M solution of HCl are needed to titrate a 100.0 mL sample of the solution?

asked by Victoria on November 21, 2012
17. ## Math

A pharmacy technician is making a 50% solution, how many mL of a 38% stock solution should be added to one pint of a 82% solution? ( just need to know how to set this problem up please)

asked by Rayne on September 25, 2015
18. ## Chemistry

The mass/volume percent of a sodium sulfate and water solution is 12.0% m/v. If the density of the solution 1.22 g/mL, what is the molarity of the solution?

asked by Laura on December 12, 2014
19. ## Chemistry

a solution is prepared by dissolving 15.0 grams of ni(no3)2 in enough water to make 250 ml of solution what is the molarity of this solution

20. ## chemistry

It has a solution to 10% v/V that has a density of 1.3 g/mL and a total volume of 200 mL (a) that solute mass has the solution (B) expresses the concentration of the solution in% m/m

asked by william on September 9, 2017
21. ## Chemistry

What volume of a .500 M HCl solution is needed to neutralize each of the following: 10 ml of a .300 M NaOH solution 10 mL of a .200 M Ba(OH)2 solution

asked by Monty on March 8, 2011
22. ## chemistry

What is the molarity of the following solutions? A. 0.96 g MgCl2 in 500 mL solution B. 9.33 g Na2S in 450 mL solution C. 2.48 g CaF2 in 375 mL solution

asked by justin on April 7, 2016
23. ## chem

A solution is prepared by dissolving 15.0 g of pure HC2H3O2 and 15.0 g of NaC2H3O2 in 600 mL of solution (the final volume). What is the pH of the solution?

asked by Jen on February 22, 2015
24. ## chemistry

What is the concentration of ammonia in a solution if 24.20 mL of a 0.1140 M solution of HCl are needed to titrate a 100.0 mL sample of the solution?

asked by Victoria on November 23, 2012
25. ## maths steve reiny

Sqrt(x)^sqrt(x)=2 show solution step that all i need thanks

asked by Anonymous on November 2, 2016
26. ## College Algebra

Use a system of equations to solve the problem. A rectangular picture frame has a perimeter of 2,200 centimeters and a width that is 300 centimeters less than its length. Find the area of the picture. _____ cm2

asked by Dee on December 12, 2013
27. ## Math

How would you solve this word problem in one variable inequality form? The maximum safe water temperature in a spa is 104 degrees. The water temperature in bill's spa is 102 degrees. The temperature is increased by, d, degrees. Write and solve an

asked by Jake on September 25, 2013
28. ## Pre-Calculus

Find the values of x for which the line y=2x intersects the parabola y=(x-1)^2+1. So I set the equations equal to eachother, and solved for x using the quadratic formula. The solution I got was: x=3.41 and x=0.59. Could someone please check my work.

asked by Jon on September 20, 2010
29. ## 5th grade math word problems

bob started each work on the hour. one day he decided to start work twenty minutes early. he started work when his digital watch had consecutive numbers. what time did he start work

asked by Anonymous on November 13, 2012
30. ## Mathematics

In an orthonormal system, you're given the following: Point P(1,2) Lina a=cartesian eqn:4x-3y+6=0 Line b=parametric eqns:x=-5+3& y=-& (real n°) Circle z=cartesian eqn:x²+y²-2x-3=0 (a)Calculate the angle between lines a an b (b)Calculate the coordinates

asked by Anonymous on May 18, 2008
31. ## Maths

In an orthonormal system, you're given the following: Point P(1,2) Lina a=cartesian eqn:4x-3y+6=0 Line b=parametric eqns:x=-5+3& y=-& (real n°) Circle z=cartesian eqn:x²+y²-2x-3=0 (a)Calculate the angle between lines a an b (b)Calculate the coordinates

asked by Anonymous on May 4, 2008
32. ## chemistry

If a crystal added to an aqueous solution causes many particles to come out of the solution, the original solution was___? A: saturated. B: an emulsion. C: supersaturated. D: unsaturated

asked by kayla on August 4, 2008
33. ## College chemistry

A buffered solution is made by adding 50.0 g NH4Cl to 1.00 L of a 0.70 M solution of NH3. Calculate the pH of the final solution. (Assume no volume change.)

asked by Nikita on March 10, 2010
34. ## Buffer

You have 500.0 mL of a buffer solution containing 0.30 M acetic acid (CH3COOH) and 0.20 M sodium acetate (CH3COONa). What will the pH of this solution be after the addition of 93 mL of 1.00 M NaOH solution?

asked by Nicole on April 11, 2011
35. ## Chemistry

Calculate the molarity of a solution in which 0.75 moles of a solute are dissolved in 125g of solution (density of solution = 1.05g/mL). I don't even know where to begin.

asked by Lisa on April 29, 2008
36. ## Chemistry - buffers

Two burettes are filled with solutions: one with 0,1OM CH3COOH solution, second with 0,15M CH3COONa. How many milliliters each solution will need to make 20mL of solution, which pH=4.85

asked by Anonymous on March 26, 2012
37. ## chemistry

A solution contains 2 mEq/ml of KCL (Molecular weight 74.5). If a 20 ml ampule of this solution is diluted to 1 liter what is the percent strength of the resulting solution?

asked by Ann on February 21, 2013
38. ## Chemistry

What is the concentration of ammonia in a solution if 22.35mL of a 0.1145M solution of HCl are needed to titrate a 100.0mL sample of the solution?

asked by Amanda on November 8, 2010
39. ## science

6g of impure NaOH was dissolved in 100ml of a solution.0.25molar solution of the base utilize 27.6ml of the solution containing 6g of trioxonitrate(5)acid.

asked by chm 101 on January 19, 2013
40. ## Chemistry

Prepare M/20 oxalic acid solution.Using this solution, find molarity, strength, and percentage purity of the sodium hydroxide solution.

asked by Sara on June 13, 2016
41. ## chemistry

how do i know if the buffering capacity of a buffer solution is lost? Is that when after I add more of an acid or base to the solution that the pH eventually goes past + or - 1 of the original solution?

asked by laura on January 30, 2012
42. ## chem

A particular household ammonia solution (d= 0.97g/mL) is 6.8% NH3 by mass. How many milliliters of this solution should be diluted with water to produce 650 mL of a solution with pH = 11.55?

asked by help!!! on February 17, 2009
43. ## chemistry

What is the pH for the solution made from 11.10 mL of 0.278 M HCl solution mixed with 70.90 mL of 0.1300 M ammonia solution ? Note that the pKa for NH4+ is 9.241 8.94 9.24 8.77 9.72 9.54

asked by Lucinda on May 27, 2010
44. ## CHEM

A particular household ammonia solution (d= 0.97g/mL) is 6.8% NH3 by mass. How many milliliters of this solution should be diluted with water to produce 650 mL of a solution with pH = 11.55?

asked by help!!! on February 16, 2009
45. ## Chemisrtry

What is the PH of a solution that results from mixing together equal volumes of a 0.150 M Solution of acetic acid and a 0.0750 M solution of sodium hydroxide?

asked by Ginger29 on March 30, 2010
46. ## chemistry

A solution is prepared by dissolving 23.7g of CaCl2 in 375.0g of water. The density of this solution is 1.05g/mL. determine the concentration (molarity) of Cl in solution.

asked by jim on March 14, 2011
47. ## college cemistry

What is the pH for the solution made from 11.10 mL of 0.278 M HCl solution mixed with 70.90 mL of 0.1300 M ammonia solution ? Note that the pKa for NH4+ is 9.241 8.94 9.24 8.77 9.72 9.54

asked by Lucinda on May 27, 2010
48. ## Buffer Solution

You have 500.0 mL of a buffer solution containing 0.30 M acetic acid (CH3COOH) and 0.20 M sodium acetate (CH3COONa). What will the pH of this solution be after the addition of 93 mL of 1.00 M NaOH solution?

asked by Nicole on April 13, 2011
49. ## Math

To conduct a scientific experiment, students need to mix 90 mL of a 3% acid solution. They have a 1% and a 10% soulution available. How many mL of each of the two solution must they combine to pruduce 90mL of the 3% solution?

asked by James on December 5, 2010
50. ## science

A solution contains 2 mEq/mL of KCL (Molecular weight 74.5). If a 20 mL ampule of this solution is diluted to 1 liter what is the percent strenght of the resulting solution?

asked by Felix on January 14, 2013
51. ## AP Chemistry

The reaction of sodium oxide with water would form: 1. a neutral solution. 2. a basic solution. 3. an acidic solution. An explanation would be appreciated too!!

asked by Help!! on January 6, 2018
52. ## History

Please check my answers please. Thank you! 1. The U.S. economy is a free enterprise system. True* False 2. Work you do for pay is called a _____. service industry diverse workforce job* volunteer job 3. When there are many people seeking the same job, this

asked by Anonymous on September 7, 2016
53. ## Chem

Aqueous solutions of Zn+2 and Pb+2 both .0010M. Both form insoluble sulfides. Appx. what pH will allow maximum precipitation of one ion and leave the other in solution? Do I just use Ksp and the equations? If so what do I do next? See the selective

asked by Anonymous on May 7, 2007
54. ## Reposted - math - Ashley's question

L=length w=width ============ eqn 1 is 2L + 2w = 28 eqn 2 is w= (1/2)L+2 =========== solve for L and w. Post your work if you get stuck. http://www.jiskha.com/display.cgi?id=1169164168 Posted by Ashley on Thursday, January 18, 2007 at 6:49pm. John made a

asked by DrBob222 on January 19, 2007
55. ## accounting

Andre has asked you to evaluate his business, Andre’s Hair Styling. Andre has five barbers working for him. (Andre is not one of them.) Each barber is paid \$9.90 per hour and works a 40-hour week and a 50-week year, regardless of the number of haircuts.

asked by Anonymous on August 16, 2009
56. ## Integrated Science

Solution F has a pH of 11, and Solution G has a pH of 13. How does the concentration of hydroxide ions in Solution F differ from Solution G? A).Solution F has 100 times more hydroxide ions than Solution G. B).Solution G has 100 times more hydroxide ions

asked by Kiley on December 15, 2018
57. ## statistics

Washington University banned smoking on the Hilltop campus starting in 2010. The student paper decides to do an opinion poll to see if current campus students/faculty/staff support the ban. Reporters are about to start asking a sample of 250 Hilltop people

asked by John on May 9, 2011

Mr. Mist’s ramp broke so he tried to lift the his 150 Newton box of ungraded papers with a pulley system. Mr. Mist had to pull the rope in his system 3 meters. The papers were lifted into his car by the pulley system which lifted the box 1.5 meters,

asked by Kevin on November 14, 2009
59. ## economics

Payroll Tax- You are an economic consultant to a city that just imposed a payroll tax of \$1 per hour of work. This payroll tax is paid by workers through a payroll deduction; for each hour of work, the employer deducts \$1 and sends the money to the city

asked by Anonymous on November 29, 2011
60. ## Algebra

The neighborhood skateboard club is starting a fundraiser in order to buy more skateboards. They have decided to sell logo mugs. The Mugs on Mugs Company offers to supply mugs to the club for \$3.75 each plus a \$55 process and handling fee. The Punny-Cups

asked by Jordan on October 16, 2009

The neighborhood skateboard club is starting a fundraiser in order to buy more skateboards. They have decided to sell logo mugs. The Mugs on Mugs Company offers to supply mugs to the club for \$3.75 each plus a \$55 process and handling fee. The Punny-Cups

asked by Jordan on October 16, 2009
62. ## physics

A closed 2.0-L container holds 3.0 mol of an ideal gas. If 200 J of heat is added, what is the change in internal energy of the system? A. 300 J B. 150 J C. zero D. 100 J E. 200 J -Since there is no mention of work being done I thing the answer is 200J but

asked by Idali on April 4, 2017
63. ## Chem

At 58.8 degrees C and at a total pressure of 1.00 atm the mole percent of acetone in the vapor state above a solution of acetone and water containing 70. mol % acetone is 87.5%. Assuming the solution to obey Raoult's Law, determine the vapor pressure of

asked by Chris on March 27, 2007
64. ## math

asked by sofia on April 12, 2014
65. ## Algebra

If the trend continued, in how many years would the median home value be \$170,000? Show how obtained your answer using the linear equation you found in part c) Suppose that the width of a rectangle is three feet shorter than length and that the perimeter

asked by Jewel on June 7, 2012
66. ## Chemistry

a piston performs work of 210. L atm on the surroundings, while the cylinder in which it is placed expands from 10. L to 25L. at the same time, 45J of heat is transferred from the surroundings to the system. Against what pressure was the piston working?

asked by Jim on October 3, 2010
67. ## Chemistry

a piston performs work of 210. L atm on the surroundings, while the cylinder in which it is placed expands from 10. L to 25L. at the same time, 45J of heat is transferred from the surroundings to the system. Against what pressure was the piston working?

asked by Jim on October 4, 2010
68. ## Chemistry 219

An amount of 1.250g of an alloy (90% Ag, 10% Cu) was treated with HNO3 and H2SO4 to form Ag2SO4 and CuSO4. The solution was then treated with Cu wire to precipitate silver. The resulting solution was treated with excess zinc to precipitate copper. (show

asked by Anonymous on February 8, 2011
69. ## chemistry

a 30.0 ml solution of potassium nitrate was diluted to 125 ml and 25 ml of this solution were then diluted to 150 ml. the concentration of the final solution is 0.00307 M. Calculate the concentration of the original solution.

asked by Carol on July 7, 2011
70. ## math

Janice conducted a survey at the local calculator factory. She discovered that 10% of every 80 calculators did not work. Using this survey, what kind of predictions can she make about the next 400 calculators? a-not enough information b-40 will not work

asked by Andrea on March 30, 2016

I am having a hard time figuring this out, can anyone help me out? Please. Preparing to Conduct Business Research Part 4 Build on the work you conducted in Preparing to Conduct Business Research: Parts 1-3. Develop or select the instruments your team will

asked by Red on July 2, 2014
72. ## Chemistry

(1)Make 500 ML of 4N H3PO4. How many grams will be needed? (2) In a titration procedure, 20mL of 2N solution were required to titrate 5mL of an unknown solution. What is the normality of the solution? (3) How much of a 0.01M can be made from 20mL of 6M

asked by Nelson on January 30, 2017
73. ## mixture problems

A chemist has two solutions of sulfuric acid. One is a 25% solution, and the other is a 50% solution. How many liters of each does the chemist mix to get 10 liters of a 40% solution? 25% solution L: 50% solution L:

asked by Kendall on November 21, 2014
74. ## chemistry

When 4.2g of NaHCO3 is added to a solution of CH3COOH Weighing 10g, it is observed that 2.2g of co2 is realised into the atmosphere . The residue left is found to be 12g . Show that this observations are in agreement with the law of conservation of mass?

asked by sid on July 11, 2016
75. ## chemistry

I have no idea how to go about this question, please help! A clumsy chemist accidentally pours 100 mL of a 0.004 M Na2SO4 solution into a beaker containing 500 mL of 0.050 M CaCl2. Will a precipitate be formed? Explain your reasoning and/or show all

asked by ryan on February 1, 2015
76. ## Algebra 1

A restaurant has one type of lemonade that has 12% sugar and another that is 7% sugar. How many gallons of each does the restaurant need to make 20 gallons of a lemonade mixture that is 10% sugar? a. 12 gallons of the 12% lemonade and 8 gallons of the 7%

asked by rachel. on January 5, 2016
77. ## Math

Hi everyone. Would someone be able to help me with this problems? I know it's a lot, if you only want to help with one or two, that is fine!! 9. Could you show how to use factoring and the zero-proudct property to find the zeros of each quadratic function?

asked by Eliza on November 19, 2008
78. ## Credit and Taxes

Nancy Tai has recently opened a revolving charge account with MasterCard. Her credit limit is \$1000, but she has not charged that much since opening the account. Nancy hasn't had the time to review her monthly statement as promptly as she should, but over

asked by candy on July 20, 2006
79. ## to ALison (planets)

Just out of curiosity, what didn't you like about the wiki.answer slides? They seemed to explain fairly well why the rocky planets are in the inner system, and the gaseous ones are in the outer system.

asked by Steve on December 17, 2013
80. ## physics

For the system on the diagram, the string is massless, and slides over the pulley without friction. The masses are m1 = 5.7kg and m2 = 6.4kg. what is the magnitude of the acceleration of the system is ( in m/s2)

asked by jake on May 28, 2014
81. ## History

I need information on technology in the criminal justice system in 1970-1980; such as the finger print system and other technological things that were developed

asked by Brandon on November 5, 2009
82. ## Chemistry

Consider the esterification reaction below C2H5OH +CH3COOH CH3COOC2H5 + H2O WHAT WILL HAPPEN IF 1. water is removed from the system? 2. More alcohol is introduced into the system?

asked by King Sọlọmọn on June 13, 2019
83. ## chemistry

name the following compound by the stock system (international systemic naming system: 1)Li2CO3 2) MnO2 3) HBrO4 4) (NH4)2 S 5) H3PO3 6) P2O5

asked by Tasha on October 21, 2012
84. ## Math

The problem to solve is: (x+20)(x-12)(x+4)>0 but I can't figure out how to do this right so I left off the >0 and tried to solve the equation. x+20 evaluates to x+20 x-12 evaluates to x-12 Multiplying x+20 by x-12 is a classic Algebra problem. Here, you

asked by Sabrina on September 24, 2010
85. ## Chemistry

20cm3 of 0.500moldm-3 H2SO4 was consumed to neutralize 50cm3 of 0.400moldm-3 NaOH. The temperature of the system is increased by 36 degree C. The heat capacity of the calorie meter was 39 JK-1, and the heat capacityof the solution is 4.2JK-1. Find the

asked by Emma on February 21, 2013
86. ## Chemistry

20cm3 of 0.500moldm-3 H2SO4 was consumed to neutralize 50cm3 of 0.400moldm-3 NaOH. The temperature of the system is increased by 36 degree C. The heat capacity of the calorie meter was 39 JK-1, and the heat capacityof the solution is 4.2JK-1. Find the

asked by Emma on February 21, 2013
87. ## Chemistry

You are given 75mL of 1mol/L NaOH and 75 mL of 1mol/L HNO3 at atmospheric pressure. After mixing the two compounds, he measured a rise in temperature from 25°C to 32°C. Find the change in energy of the system in kJ/mol. (Known: Density of aqueous

asked by John on May 26, 2015
88. ## English

1. I can't concentrate on work. 2. I can't concentrate at work. 3. I can't concentrate (on something) at work. ------------------ Which one is correct? Does #1 mean #3? •English - Writeacher, Saturday, June 18, 2016 at 8:46am 1 and 2 are fine, but mean

asked by rfvv on June 20, 2016
89. ## Math, Algebra

1. You earn \$7.15 for every hour you work walking dogs. At the end of every day, you spend \$3 on snacks as a reward to yourself. 2. You work at a restaurant as a waiter, so you get tips at most tables. At the end of the first day, you get \$10.36, on the

asked by Julinha on October 25, 2019
90. ## history

would the system of a jury go under the category of government or legal system? please help =)

asked by marina on May 20, 2008
91. ## science

Where can I find some information about nourvis system and endocrine system?

asked by jhon on December 27, 2010
92. ## math

Name two properties that the Roman system has that the Hindu Arabic system did not have.

asked by Mike on January 18, 2010
93. ## computer

asked by tee on May 6, 2010
94. ## science

Why is the system of sun and planets called the solar system

asked by Amari on November 9, 2014
95. ## psychology

Neurotronsmitters are to the nervous system what ____are to the endocrine system

asked by dee on April 2, 2009
96. ## Math

ax+by=16 3x+2y=64 In the system of equations above, a and b are constants. If the system has infinitely many solutions, what is the value of ab?

asked by Suzan on January 23, 2018
97. ## Chemistry

If 100mL of a 0.10M NaOH solution is added to 75mL of a 0.15 HCl solution, then what is the pH of the resultant solution?

asked by Bert on August 22, 2007
98. ## Chemistry

John has 300 mL of 0.65 M NaCl solution. Mary has 500 mL of 0.35 M solution. What is the concentration of the solution if they pour them together

asked by Tracy on November 21, 2010
99. ## chemistry

If a solution appears to be violet, what range of wavelength would you use for analysis of the solution? How about if the solution was blue-green?

asked by Jenna on November 15, 2010
100. ## Chemistry- wavelengths

a. If a solution appears to be violet, what range of wavelength would you use for analysis of the solution? b. How about if the solution was blue-green?

asked by Jenna on November 15, 2010