# 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 199
1. ## Chemistry

What volume of a 15.0% by mass NaOH solution, which has a density of 1.116 g/mL, should be used to make 4.40 L of an NaOH solution with a pH of 10.5?

asked by Emma on March 17, 2013
2. ## Chemistry

A solution contains 14% by mass of h2so4.find the number of moles of h2so4 in 155g of solution

3. ## Math

Please check my answers 1. Which ordered pair is a solution of y=x-4? My answer is B (0, -3) 4.Which equation has (2,-1) as a solution My answer is D y=-2x+1

asked by COW on February 12, 2018
4. ## Chemistry

A 15.0 mL sample of 0.250 M H2SO4 is neutralized by 20.5 mL of KOH solution. What is the molarity of the KOH solution?

asked by Audrey on October 8, 2012
5. ## chemistry

what is the molarity of a solution containing 23g of NaCl in 500 mL of solution? (the molecular mass of NaCl is 58.44.)

asked by lilly on April 28, 2011
6. ## Chem 2068 lab

Once I have the molarity for KHP which is 0.0027 M, and i add 14.48 mL of NaOH to the solution, what is the concentration of NaOH in the solution.

asked by Car on October 18, 2010
7. ## chemistry

What is the pH of a solution prepared by dissolving 6.0 g of HCl in water to make 415 mL of HCl solution?

asked by Chuck on March 29, 2011
8. ## math

chemist has 6liter of 50% acid solution .how much water added to obtain 20% acid solution?

asked by Anisha on May 1, 2010
9. ## Chemistry

What is Mass % of an aqueous NaOH solution in which molality of NaOH is 16.7m? Density of the solution is 1.4339g/ml

asked by Janet on January 13, 2013
10. ## chemistry

If 17.5 mL of 0.553 M KOH is needed to neutralize 25.0 mL of an HBr solution what is the molarity od HBr solution

asked by rosie on May 3, 2016
11. ## chemistry

To what volume should you dilute 60mL of a 12.0M H2SO4 solution to obtain a 1.85M H2SO4 solution?

asked by Amy on April 8, 2014
12. ## Chemistry

An aqueous solution is 0.257 m NaOH. What are the boiling point and freezing point of this solution?

asked by MJ on March 29, 2012
13. ## chemistry

What volume for 1.5M KCl solution must be used to prepare 500. mL of a .550 M KCl solution? I need the set up

asked by Sarah on September 22, 2010
14. ## algebra

How many kilograms of water must be evaporated from 10kg of an 8% salt solution to produce a 25% salt solution

asked by TinaG on May 24, 2010
15. ## chemistry

It takes 62 mL of 0.124 M KOH to neutralize46.7 mL of H2SO4 solution. What is the concentration of the H2SO4 solution?

asked by cheri on September 13, 2012
16. ## chemistry

to what volume should you dilute 0.100L of a 15M NaOH solution to obtain a 1.0M NaOH solution

asked by veronica on July 10, 2013
17. ## chemistry

to what volume should you dilute 0.100 L of a 15M NaOH solution to obtain a 1.0 M NaOH solution?

asked by eugene on March 26, 2011
18. ## science

If you have 0.50M Ca(NO3)2 solution, how many mL of this solution must be evaporated to obtain 32.8 grams of solid Ca(NO3)2?

asked by Makena on November 3, 2010
19. ## Math! URGENT

Describe the number of solutions for the equation. -2(x-1)=2x-2 A. Infinite solutions B. One solution C. No solution Is the answer B?

asked by Gwen on September 25, 2014
20. ## algebra 1

is (0.3) a solution to the equation y=x+3? yes no** is (1,-4) a solution to the equation y= -2x yes** no look at the following points (4,0) , (3,-1) ,(6,3) , (2,-4) which are solutionns to y=x -4? choose all correct answers (6,3)** (3,-1) (2,-4) (4,0)**

asked by oto on September 6, 2016
21. ## Chemistry

1.000 grams of KHP consumed 43.3 mL of KOH solution. What is the molarity of the KOH solution?

asked by Anonymous on November 9, 2016
22. ## chemistry

determine the molarity of a 18 ml sample of HCl solution that is required to prepare 30 ml of 2.3 M HCl solution?

asked by linda on February 11, 2011
23. ## Chemistry

To what volume should you dilute 53 mL of a 12 M stock HNO3 solution to obtain a 0.138 M HNO3 solution?

asked by cant tell ya on April 10, 2019
24. ## UMD

A solution of H2SO4(aq) with a molal concentration of 3.22 m has a density of 1.183 g/mL. What is the molar concentration of this solution?

asked by Janice on September 30, 2012
25. ## chemistry

A solution of H2SO4(aq) with a molal concentration of 6.25 m has a density of 1.300 g/mL. What is the molar concentration of this solution?

asked by Felicia on February 9, 2013
26. ## chemistry

. What would be the molarity of the solution produced when 276 mL of 6.00 M NaOH is combined with 125 mL of a 2.00 M NaOH solution?

asked by jey on February 20, 2017
27. ## Chemistry...Help!!

To what volume should you dilute 131 mL of an 8.20 M CuCl2 solution so that 49.0 mL of the diluted solution contains 4.53g CuCl2 ?

asked by Lisa, Help needed! on December 7, 2010
28. ## chemistry

To what final volume should you dilute 50.5ml of a 4.75 M KI solution so that 27.5ml of the diluted solution contains 3.10g of KI

asked by help on October 24, 2010
29. ## math

the lab keeps two acid solutions on hand. one is 20% and the other is 35%. how much 20% and how much 35% acid solution should be used to prepare 25 liters of a 26% solution?

asked by skye on July 12, 2012
30. ## Chem

A precipitate is expected when an aqueous solution of porassium iodide is added to an aqueous solution of

asked by Taylor on October 24, 2007
31. ## pharmacy tech

Determine the milliliters of water needed to prepare 2 oz of a 10% solution from a 12.5% solution and distilled water.

asked by rob on April 4, 2011
32. ## Math! URGENT

Describe the number of solutions for the equation. 5(x-9)=5x A. No solution B. One solution C. Infinite solutions Is the answer B? Thank You for any help.

asked by Gwen on September 25, 2014
33. ## pharmacy tech

Determine the milliliters of water needed to prepare 2 oz of a 10% solution from a 12.5% solution and distilled water.

asked by rob on April 4, 2011
34. ## chemistry

Calculate the volume of a 9.00 M HNO3 stock solution that must be used to prepare 450 mL 0f a 1.80 M HNO3 solution.

asked by katie on May 7, 2008
35. ## science

What volume of .01M KOH solution is needed to react with 20ml .01M Zn(OH)2 solution

asked by Anthony on May 19, 2011
36. ## chemistry

a 36.o% Aqueous solution of sucrose has a density of 1.16g/mL.What mass of sucrose is in 500mL of this solution?

asked by katie on May 7, 2008
37. ## Chemistry

A solution contains 153g Na3PO4 and 415g H2O. What is the percentage concentration of Na3PO4 in this solution

asked by wj on July 13, 2011
38. ## Algebra

Find the y- and x-intercepts for the equation. Then graph the equation. Does y come first in the solution? I figured that: the first solution is (0,-3) is this correct? and is x = to {3/7,0}? Thanks! f(x) = - 3 - 7x

asked by Rachale on March 2, 2009
39. ## Chemistry

How do you prepare 600.0mL of 0.48M Al(NO3)3*9H2O? Is this correct? 1. Measure out 71g of solution 2. Put approx. 300.0mL of water into container 3. Add the 71g of solution to the water and mix 4. Add more water until 600.0mL of solution is obtained 5. Mix

asked by Anon on November 25, 2012
40. ## Chemistry(Please respond, thank you!)

For the system CaO(s) + CO2(g) = CaCO3(s), I added 1.00 mol of CaO(s) to 1.00L of 0.500M CO2(g) at 200 oC. At equilibrium the [CO2] = 0.150M. What is the value of Kp for this reaction? Kp would = CaCO3/(CaO)(CO2) I do not know what to do with the 0.500M

asked by Hannah on March 15, 2012
41. ## Ed Tech Connexus

1.in Microsoft®️ execel graphs are refered to as? a. sparklines b. illustrations c. tables d. charts 2. What is one of the strengths of line graphs? a. line graphs show percentage of a whole b. line graphs show change over time c. line graphs compare

asked by Girl Gamer on November 14, 2017
42. ## pre-calculus

While pulling a stalled car, a tow truck's cable makes an angle of 50 degrees above the road. If the tension on the tow truck's cable is 1600 newtons, how much work is done by the truck on the car pulling it 1.5 kilometers down the road? The answer is

asked by Christa on February 21, 2010
43. ## math/integers

how do you solve integers? There are about a thousand different types of problems with integers, so it depends on what type of problem. Do you have something specific in mind? In general, modulo arithmetic is used, but it is taught in very few schools

asked by Anonymous on October 10, 2006
44. ## college maths

In amusement park considering adding some new attractions,conducted a study over several typical days and found that ,of 10,000 families entering the park ,1024 brought just one child (define as younger than age 12),3370 brought two children ,3510 brought

45. ## social studies

1. which of these was a result of the invention of the cotton gin. A. It greatly reduced the need to plant cotton seeds by hand. B.It provided a faster method for separating seeds from cotton fibers C.It enabled slaves to work in factories operating

asked by Help me on February 27, 2017
46. ## Chemistry

The kinetic energy of a rolling billiard ball is given by {\rm{KE}} = 1/2\,mv^2 . Suppose a 0.17-{\rm kg} billiard ball is rolling down a pool table with an initial speed of 4.5 m/s. As it travels, it loses some of its energy as heat. The ball slows down

asked by Katherine on October 9, 2009
47. ## Algebra 116 A

solve and graph 2x+9 greater or equal to 5 and 2x-13 greater or equal to -9 the solution is {x x greater or equal to ?} What is the ? help

asked by katie on September 23, 2011
48. ## math

can anyone help with this? suppose you bought some 32 cents stamps and some 20 cents stamps. you spent $3.92 for 16 stamps. how many of each stamp did you buy? i got the equation--.32x + .20y =$3.92 but don't know how to solve for x and y Step 1: Solve

asked by norman on February 1, 2007

Suppose the price of apples rises from $3.50 a pound to$4.00 and your consumption of apples drops from 30 pounds of apples a month to 20 pounds of apples. Calculate your price elasticity of demand of apples. What can you say about your price elasticity of

asked by jward1970 on February 24, 2010
50. ## English

1. The problem is so difficult that I cannot solve it. 2. The problem is too difficult for me to solve. 3. It is too difficult for me to solve the problem. (Are the three sentences the same? Do they come from the same structure? Can we omit 'that' in

asked by rfvv on May 3, 2010

How would you do this problem? At the beginning of the year, the price of gasoline is $1.05 per gallon. The price increased$0.05 per gallon each week for the next 5 weeks. The price then decreased $0.07 per gallon for the next 3 weeks. Find the difference asked by Jillian on August 26, 2008 52. ## Oedipus What actions show Oedipus wasn't completely good? In the play Oedipus Rex, I need solid evidence of Oedipus' actions that show he was not completely good nor completely evil. I have what I need for reasons he is not completely evil, but to me he seems like asked by Norah on November 30, 2010 53. ## Business Communication As a professor at State University, you have been asked to write a letter of recommendation for one of your advisees who is applying for an internship. The student is now a senior and you have known her since she was a freshman. She has taken two courses asked by Kasey on September 27, 2011 54. ## Business Communication As a professor at State University, you have been asked to write a letter of recommendation for one of your advisees who is applying for an internship. The student is now a senior and you have known her since she was a freshman. She has taken two courses asked by Kasey on September 27, 2011 55. ## Government The Intolerable Acts led to most directly to which event? A. Stamp Act Congress B. Constitutional Convention C. First Continental Congress D. Second Continental Congress The Framers Included the Supremacy Clause in the Constitution for the purpose of? A. asked by Irene on September 12, 2016 56. ## Science How do I show my calculations in the results section of the lab report? The lab is about waters equilibrium temperature and I have several repeated calculations, for example, the margin of error is calculated more than four times. My teacher said to put asked by Miley on March 11, 2019 57. ## math Tamar is crating a veritcal bar graph to show how far each of her friends loves from school the data are in the table shown. Friend 1 2 3 4 5 6 7 8 9 10 Distance 7 8 9 9.5 6.5 16 7 7.5 8 10 from school (miles) What numbers are appropriate for Tamar to use asked by I NEED HELP! on February 21, 2013 58. ## math Tamar is crating a veritcal bar graph to show how far each of her friends loves from school the data are in the table shown. Friend 1 2 3 4 5 6 7 8 9 10 Distance 7 8 9 9.5 6.5 16 7 7.5 8 10 from school (miles) What numbers are appropriate for Tamar to use asked by plz help me !!!!!!!!!!!!!!!! on February 21, 2013 59. ## MATH Tamar is crating a veritcal bar graph to show how far each of her friends loves from school the data are in the table shown. Friend 1 2 3 4 5 6 7 8 9 10 Distance 7 8 9 9.5 6.5 16 7 7.5 8 10 from school (miles) What numbers are appropriate for Tamar to use asked by I NEED HELP! on February 21, 2013 60. ## Chemistry One half-cell of a concentration cell consists of a silver wire dipping into a 1.00 M solution of Ag+. The second half-cell consists of a silver electrode in a solution containing an unknown concentration of Ag+. The measured cell potential was determined asked by Student on February 26, 2008 61. ## Math Use this equation to estimate typing speed, S=w/5-2e, where S is the accurate typing speed, w is the number of words typed in 5 minutes, and e is the number of errors. Choose the letter for the best answer. One of the qualifications for a job is a typing asked by Katie on February 28, 2012 62. ## CheMistry A stock solution was prepared by dissolving exactly 0.4000 g of pure ASA (180.16 g/mol) in 10.00 mL of NaOH and heating the solution to a gentle boil. After cooling to room temperature, the solution was poured into a 250-mL volumetric flask and diluted to asked by ChEm on April 18, 2010 63. ## U.S history Was Slavery the basis of freedom in colonial America? This what I hvae written I feel like its to much and would like to shorten it and make it sound more college level plz help. In colonial America slavery was the basis of freedom. In areas such as Europe asked by rachel on September 16, 2015 64. ## ANALYTICAL CHEMISTRY 3. How many moles of HCl are required to make 15.00 mL of an aqueous 2.500 molar HCl solution? How many moles of Cl- are in 1.000 mL of the aqueous 2.500 molar HCl solution mentioned above? How many moles of H+ are in 1.000 mL of the aqueous 2.500 molar asked by JONESTONE on May 6, 2012 65. ## ANALYTICAL CHEMISTRY 3. How many moles of HCl are required to make 15.00 mL of an aqueous 2.500 molar HCl solution? How many moles of Cl- are in 1.000 mL of the aqueous 2.500 molar HCl solution mentioned above? How many moles of H+ are in 1.000 mL of the aqueous 2.500 molar asked by JONESTONE on May 6, 2012 66. ## computer you know when people show a film and they have some part cut off like when: you are holding a piece of paper but the hand part doesnt show because you did something to the film to make it look like the paper is flying. How do you do that? asked by Celest on January 7, 2013 67. ## MATHIN-HELPN! a. Show that the ratios 10/20 and 30/60 form a proportion by finding a common multiplier. b. Show that the ratios in part (a) are equal by writing them in simplest form. I think that part (a) is 60, but, I dont know what (b) is. asked by Agal on November 17, 2016 68. ## English 1. He shall do the work. 2. I will make him do the work. 3. I want him to do the work. --------------------------- Does #1 mean #2 or #3? asked by rfvv on May 23, 2017 69. ## math,factoring,help Can someone please show me step by step how to do these. I've read the book and there examples and It is just not clicking. Directions: Factor each of the following polynomials completely Problem:#1 14x^2-20x+6 Directions:Find all positive values for "K" asked by Jasmine20 on January 31, 2007 70. ## Can someone check my answer please Can someone check this for me? Suppose that the number of cars, C, on 1st Avenue in a city over a period of time t, in months, is graphed on a rectangular coordinate system where time is on the horizontal axis. Suppose that the number of cars driven on 1st asked by Cupcake on December 15, 2007 71. ## CHEM HELP ASAP I figured all the parts of the problem except for the last one. Can you tell me what to do? In the preparation of a mustard solution, an individual package of mustard was emptied into a beaker and the mass was determined to be 3.809 grams. The mustard was asked by Kelli on October 10, 2012 72. ## CHEM HELP ASAP I figured all the parts of the problem except for the last one. Can you tell me what to do? In the preparation of a mustard solution, an individual package of mustard was emptied into a beaker and the mass was determined to be 3.809 grams. The mustard was asked by Kelli on October 10, 2012 73. ## CHEM PROB MR BOB I figured all the parts of the problem except for the last one. Can you tell me what to do? In the preparation of a mustard solution, an individual package of mustard was emptied into a beaker and the mass was determined to be 3.809 grams. The mustard was asked by Kelli on October 10, 2012 74. ## Stoichiometry Suppose you wanted to add just enough 0.40M calcium chloride solution to 75.0mL of 0.60M of sodium carbonate solution for all of the sodium carbonate and calcium chloride to react. a) What volume of 0.40M calcium chloride solution would be required? asked by Ryan on November 27, 2016 75. ## physics The concepts in this problem are similar to those in Multiple-Concept Example 4, except that the force doing the work in this problem is the tension in the cable. A rescue helicopter lifts a 85.8-kg person straight up by means of a cable. The person has an asked by Anonymous on November 4, 2013 76. ## Physics The concepts in this problem are similar to those in Multiple-Concept Example 4, except that the force doing the work in this problem is the tension in the cable. A rescue helicopter lifts a 72.4-kg person straight up by means of a cable. The person has an asked by Randy on February 26, 2013 77. ## Physic The concepts in this problem are similar to those in Multiple-Concept Example 4, except that the force doing the work in this problem is the tension in the cable. A rescue helicopter lifts a 75.4-kg person straight up by means of a cable. The person has an asked by Lena on March 5, 2015 78. ## programming Design a class named Book that holds a stock number, author, title, price, and number of pages for a book. Include methods to set and get the values for each data ﬁeld. Also include a displayInfo() method that displays each of the Book’s data ﬁelds asked by stephanie on March 30, 2013 79. ## english Phantom of the Opera. What are some actions of Erik that show horror? What are some actions of Erik that show romance asked by Anonymous on April 5, 2015 80. ## math urgent please help Mrs Buttler bought 1,800 shares of Stairwell Mutual Fund At an offer price of$3.00 per share. She later sold the shares at a net asset value of $4.60m per share. During the time Mrs Buttler owned the shares, Stairwell Mutual paid adividend of$0.80 per

asked by Anonymous on November 9, 2007
81. ## Chemistry-Plz see this DrBob

I am sorry I do not know what happens the symbolism, so I just deleted the symbols. Is it works for you that deleted the symbols? Using standard reduction potentials, calculate the standard Ecell, emf, for each of the following reactions. State if each

asked by Anna on April 16, 2011
82. ## Chemistry

Calculate the molarity of 3 drops (0.15mL) of a 0.5M Na3PO4 solution after adding 15 drops (.75mL) of water. (Presume drops are the same size, one drop = 0.05mL)((Presume volumes are additive)) So far I've figured .15g Na3PO4/163.94g/mol Na3PO4 =

asked by Kevin on March 8, 2016
83. ## Physics

7. An early objection to the idea that the earth is spinning on its axis was that the earth would turn so fast at the equator that people would be thrown into space. Show the error in this logic by calculating the centripetal force needed to hold a 100. kg

asked by Brian on February 2, 2015
84. ## algebra

Maurice drove 400 km from Edmonton to Battleford in 1 hour less time than it took Martin to drive the same route from Battleford to Edmonton. If Maurice drove 20 km/h faster than Martin, at what speed did each of them drive? Show a complete algebraic

asked by Shay on February 12, 2007
85. ## ELA

What should be changed in this sentence? Yes, only six rooms is finished A. change Yes, to Yes B. change is to are C. change finished to finish D. make no change B? What should be changed in this sentence? Construction was started eight years ago in 1792,

asked by Jaycee on January 19, 2012
86. ## English

1. What are the means of public transportation in our country? 2. What does the color on the subway map mean? 3. Find and write down the sentences which are the reasons for the following sentences from the reading text. 4. Draw a line between the picture

asked by John on October 21, 2008
87. ## Counseling

I chose C for this question. Is C the correct answer? 1. Dr. Ben Casey encountered a problem with a new client in therapy. Using the model of reflective practice what is the sequence of steps Dr. Jones should use in order to work with this client

asked by Sharon on October 15, 2014
88. ## Word Problems!!

PLz help me!These questions are on my study guide for tommorrow's test and I don't get them.Please help me solve them because I don't have a lot of time because I have to go to Chruch in 20 minutes.PLease help!Thanks! 1.Six pears and three apples cost

asked by Martha on November 6, 2006
89. ## Chemistry

Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.200 M phosphoric acid solution. pKa1 = 2.16 pKa2 = 7.21 pKa3 = 12.32 Ok I haven't

asked by Rachel on July 21, 2014

How many registered doctors are there when 29.1% of all registered doctors were female and there were 48,700 female registered doctors? P.S. I have to show my work.

asked by Catgirl on February 27, 2018
91. ## Physics Classical Mechanics

Consider a double star system under the influence of the gravitational force between the stars. Star 1 has mass m1 = 2.32 × 10^31 kg and Star 2 has mass m2 = 1.76 × 10^31 kg. Assume that each star undergoes uniform circular motion about the center of

asked by Anonymous on October 21, 2013
92. ## History

Which examines the impact of Napoleon’s territorial conquest on the world? Napoleon's conquest of Spain led to independence movements in Spain's colonial holdings in the Americas. Unification of the Rhine created a new European imperial power in Africa.

asked by Mason on January 3, 2018
93. ## History

Which examines the impact of Napoleon’s territorial conquest on the world? a.Napoleon's conquest of Spain led to independence movements in Spain's colonial holdings in the Americas. b.The establishment of the Napoleonic code allowed for the codification

asked by Bri on January 17, 2018
94. ## Pre-Calculus

I need help-I do not understand. The question is this: Write 2x+y=5 in polar form. By following the example in the book I get: 5sqrt5/5=1/sqrt5*sqrt5/2. I do not know how to proceed but the answers I have to choose from are: a) -sqrt5=r cos(theta-27

asked by Lucy on August 30, 2008
95. ## Reposted - math - Ashley's other question

http://www.jiskha.com/display.cgi?id=1169164297 Posted by Ashley on Thursday, January 18, 2007 at 6:51pm. px+qy=r 2px-qy=2r find the solution. For Further Reading math - bobpursley, Thursday, January 18, 2007 at 7:09pm There are five unknowns here: p, q,

asked by Writeacher on January 19, 2007
96. ## Math

SIMPLEX METHOD - Table: Nutrient Peanuts Raisins M&Ms Pretzels Calories 855 435 1024 162 Protein 34.57 4.67 9.01 3.87 Fat 72.50 0.67 43.95 1.49 Carbs 31.40 114.74 148.12 33.68 Suppose that you want to make at most 10 cups of trail mix, using all the

asked by Jay on June 4, 2011
97. ## Chemistry-Repost for DrBob222

500 ml of a buffer solution with ph=2.10 must be prepared using .4 M HNO2 and solid KNO2. The ka value of HNO2 is 4e-3. a.) What mass of KNO2 should be added to 3 L of the HNO2 to make the buffer? b.) What is the buffer's pH after 150 ml of .5 M HNO3 is

asked by Anonymous on March 21, 2014
98. ## Chemistry

Did I do this correctly or do I need to try again? What is the mass percent of a solution when 18.6 g of table salt is added to 81.4 g of water? Mass Percent = mass of solute(g)x100 mass of solution (g) = 18.6 g x100 18.6 g + 81.4g = 18.6 g x 100 100g =

asked by Lori on February 8, 2008
99. ## Math help :(

I don't get any of these practice problems. 5. 2(x – 3) = 2x one solution no solutions infinitely many solutions 6. 3(y – 3) = 2y – 9 + y one solution no solutions infinitely many solutions 7. 10x – 2 – 6x = 3x – 2 + x one solution no solutions

asked by Princess Anna on January 6, 2014