# 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 205
1. ## Chemistry

Which of the following pairs would make a good buffer solution in an aqueous solution? A) H2SO4 and NaHSO4 B) Ca(NO3)2 and HNO3 C) HCl and NaCl D) HF and NaOH E) none of them I know the answer is D but I don't understand why. I would think it would be C

asked by Jonah on March 20, 2013
2. ## chemistry

20.0 mL of a 0.125 M solution of potassium iodide is added to 15.0 mL of a 0.235 M solution of lead (II) nitrate. A reaction occurs via the balanced equation below: 2KI(aq)+ Pb(NO3)2(aq) --> 2KNO3(aq) +PBI2(ppt) How much product can theoretically be

asked by Brunette on September 1, 2012
3. ## chem - br bob is this right

What is the pH of a solution prepared by adding 4.000 grams of NaOH to a 50.00 mL of a buffer that is 2.00 molar both in acetic acid and sodium acetate? (Assume final volume is still 50.00 mL) * chem - DrBob222, Wednesday, April 21, 2010 at 10:52pm * chem

asked by phil on April 21, 2010
4. ## math show work please

1-11/x+30/x^2=0 A.the solution set is ? B.The solution set is the set of real numbers or C. the solution set is an empty set

asked by wally on November 25, 2014
5. ## maths

1a) Solve the each of these equations by factorising the left hand side into a product of linear factors: (i) x^2 - 6x - 40 = 0 (ii) 3x^2 + 20x - 7 = 0 (b) For each question in part (a), check your solutions by substituting them back into the equation. 3.

asked by Michael on October 24, 2016
6. ## maths

1a) Solve the each of these equations by factorising the left hand side into a product of linear factors: (i) x^2 - 6x - 40 = 0 (ii) 3x^2 + 20x - 7 = 0 (b) For each question in part (a), check your solutions by substituting them back into the equation. 3.

asked by Michael on October 25, 2016
7. ## maths

1a) Solve the each of these equations by factorising the left hand side into a product of linear factors: (i) x^2 - 6x - 40 = 0 (ii) 3x^2 + 20x - 7 = 0 (b) For each question in part (a), check your solutions by substituting them back into the equation. 3.

asked by Saphina AlMatary on October 24, 2016
8. ## solutions

How many molecules of glycerol (C3, H8, O3) would be present in 1 L of M glycerol solution? I am thinking it is 6.02 x 10^23 but have also heard conflicting opinions. You don't give the molarity of the C3H8O3. 1 mole of anything contains 6.02 x 10^23

asked by sarah on September 17, 2006
9. ## PHYSICAL SCIENCES

TWO FORCES OF 60N AND 80N RESPECTIVELY ACT SIMULTANEOUSLY AT A POINT .SKETCH AND DETERMINE THEIR RESULTANT BY USING TAIL TO HEAD METHOD

asked by NTSHIDISENG on January 20, 2016
10. ## Math

Find the volume of the solid obtained by rotating the region enclosed by y=x^2, y=6x about the line x=0using the method of disks or washers.

asked by Leslly on February 3, 2018
11. ## Chemistry

Which process represents a general method for the preparation of a metal from its compounds? . (A) neutralization (D) fusion (B) reduction (E) sublimation (C) oxidation

asked by LT on May 12, 2008
12. ## Math (Calculus)

Use the shell method to set up and evaluate the integral that gives the volume of the solid generated by revolving the plane region about the y-axis. y=4-x^2, y=0

asked by Sherman on May 8, 2014
13. ## Intermediate Algebra

Create a list of six questions on solving equations with absolute value symbols that I will try to research, address, discuss, and/or express with my method?

asked by Roger on May 2, 2012
14. ## algebra 1

Which statistical method best represents this set of data? 1,2,5,2,3,7,300,5,3,3 a.mean b.median c.mode d.standard deviation I'm pretty sure it's B or C, but they are both the same number.

asked by Lily on September 21, 2010
15. ## math

what is the lowest number which is divisible by 1,2,3,4,5,6,7,8 and 9? Go to: http://www.helpwithfractions.com/least-common-denominator.html And apply method 2 It works very well.

asked by jamie on June 7, 2007
16. ## Chemistry

please help me balance these equations using the method of half reactions.. Na + HCL = NaCl + H2 Pb + PbO2 + H2SO4 = PbSO4 +H2O Thank you, even a little help is appreciated.

asked by Justin on April 2, 2014
17. ## Accounting

Is it ethical to lengthen asset lives to reduce depreciation expense using the straight line method? Also, is this against accounting regulations?

asked by Lisa on December 8, 2009
18. ## CHEMISTRY

BALANCE THE REDOX REACTION USING HALF CELL METHOD IN AN ACIDIC MEDIUM CHCl3 + MnO4- = Cl2 + CO2 + Mn+2

asked by Maria on September 15, 2016
19. ## Chemistry

Find moles of atoms in 9.00g of Magnesium nitrate. And please tell me method of typing molecular formula of any compound as of water or etc.

asked by ABC on June 4, 2017
20. ## AP calc

Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about the specified axis. y = 13 sqr.(x) y = 0, x = 1; about x = −3

asked by Emma on February 19, 2015
21. ## Statistics

You have two independent samples of size 24 and 27. You conduct a hypothesis test and obtain a p-value. Using the conservative method what would you use for the degrees of freedom for comparison? 24 27 23 26 49

asked by Clueless on November 1, 2012
22. ## Statistics

You have two independent samples of size 24 and 27. You conduct a hypothesis test and obtain a p-value. Using the conservative method what would you use for the degrees of freedom for comparison? 24 27 23 26 49

asked by Huh on November 4, 2012
23. ## Add maths form 4

Given that the quadratic equation hx^2 - 4kx + 9h =0 has two equal roots, find the ratio h:k The answer given is 4:6. I need to know the method pls... Thx in advance

asked by Sha on January 26, 2015
24. ## Algebra Question

Quadratic equations can be solved by graphing, using the quadrat completing the square, and factoring. What are the pros and cons these methods? When might each method be most appropriate?

asked by pj on January 29, 2009
25. ## Statistics

You have two independent samples of size 24 and 27. You conduct a hypothesis test and obtain a p-value. Using the conservative method what would you use for the degrees of freedom for comparison? 24 27 23 26 49

asked by Clueless on October 26, 2012
26. ## Chem 101

Using the "Unit conversion method", derive an equation to calculate the heat required to raise the calorimeter to the maximum temperature.

asked by John on October 26, 2011
27. ## Algebra

Divide the polynomials using the long division method. what is the answer in the form P(x) = Q(x) - D(x) + R(x) P(x) the dividend, Q(x) the quotient, R(x) the remainder ( i dont know what D(x) stands for x+2 ) 3x^5 +5x^4 -4x^3 +2x^2 +7x +3

asked by anonymous on September 2, 2018
28. ## 7th Grade Physics

Given a homogenous liquid mixture of sodium chloride (salt) and water, what would be the best method to separate these substances? What is the process. Please explain.

asked by completeidiot on September 14, 2012
29. ## Accounting

What impact does amt have on the decision to whether to use either the percentage of completion method or completed contract for reporting profit on longterm contracts?

asked by Marie on November 27, 2011
30. ## Calculus 2

use the method of cylindrical shells to find the volume of the solid obtained by rotating the region bounded by the given curves about the x-axis. xy=1, x=0, y=1, y=3

asked by Dib on August 30, 2014
31. ## tax income

When filing their tax returns, almost all individuals use the __________ method. A. accrual B. cash receipts and disbursements C. recognition D. accounting is it B

asked by Billy on March 2, 2012
32. ## Math

Find the volume generated. The region is bounded by y = 4x-x^2 and y = 8x-2x^2, and is rotated about x = 2. State which method (washer, disk, cylindrical shell) is used

asked by Em on January 27, 2013
33. ## accouing

When sales are constant, but the production level fluctuates, net operating income determined by the variable costing method will:

asked by Anonymous on October 10, 2013
34. ## English

is this a strong thesis statement? A safe and effective method, vaccines protect children and those around them from harmful diseases and illnesses.

asked by Sara123 on February 9, 2019
35. ## Calculus

Use the disk method to find the volume of the solid generated by revolving about the y-axis the region bounded by the curves y=8−x^2 and the curve y=x^2.

asked by Travis on April 25, 2017
36. ## accounting

When sales are constant, but the production level fluctuates, net operating income determined by the absorption costing method will:

asked by Mary on December 31, 2015
37. ## chemistry

Based on a Ksp experiment, describe a way to soften water by removing calcium ions. What would be the advantages and disadvantages of your method?

asked by Lucy on April 12, 2009
38. ## Math

Teach me the method for this question: if a car travels 180km on 18 litres of petrol, then on a full 40litre - tank it should travel.

asked by Chris on June 17, 2017
39. ## calculus

Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about the specified axis. 27y = x3, y = 0, x = 6

asked by ama on September 11, 2012
40. ## Integral calculus

Use the cylindrical shell method to find the volume of the solid generated by revolving the area bounded by the given curves (x-3)^2 + y^2 = 9, about y-axis.

asked by Anonymous on May 15, 2016
41. ## Math (Calculus)

Find the volume of the solid generated by revolving the region bounded by the graphs of the equations about the y-axis. (Use Disc Method) y=3(2-x), y=0, x=0

asked by Sherman on May 8, 2014
42. ## calculus

Use the shell method to set up and evaluate the integral that gives the volume of the solid generated by revolving the plane region about the y-axis. y = 6x y = 18 x = 0

asked by MAM on January 24, 2012
43. ## biology

the information you gather during an experiment is called your? http://www.c4md.org/research/method.html Look at #4 carefully when there

asked by Anonymous on December 14, 2006
44. ## Algebra

Use method II to simplify the following complex rational expression. 5-13/x-2 divided by 6/x-2-7. I'm not sure if this is the proper set up, but it's suppose to be a division on top and bottom. Please if someone could help

asked by Pam on September 26, 2015
45. ## Eng

I really need help on finding the comparsion and contrast of two poets named Andrew Marvell and Matthew Arnold and their Motivition and Method. I been trying for two days now and still have nothing can you help please? Thank You

asked by LaTarial on November 7, 2008
46. ## Chemistry

Kmno4+h2so4+feso4=k2so4+mnso4+fe2(so4)3+h2o balance by partial equation method

asked by Bela on March 23, 2019
47. ## Ap calc

Use the method of cylindrical shells to find the volume V of the solid obtained by rotating the region bounded by the given curves about the x-axis. x + y = 3, x = 4 − (y − 1)^2

asked by Emma on February 19, 2015
48. ## Chemistry

Balance? Cr2O7^2- + C2H4O yields C2H4O2 + Cr^3+ (When I say ^ a number followed by a plus or minus that's the charge) Half-reaction method needed.

asked by Alex on October 11, 2010
49. ## Calc

The volume of the solid obtained by rotating the region enclosed by y=e^(5x)+2 y=0 x=0 x=0.7 about the x-axis can be computed using the method of disks or washers via an integral A=? b=? V=?

asked by Josh on May 3, 2014
50. ## math

To find a sales tax of 6% on a purchase of \$90.00 using the proportion method you would write the following: 6/100 = ST/\$90 The calculations in this problem would give you the following: (ST)= \$540.00

asked by Anonymous on February 6, 2011
51. ## calculus

Set up the integral that would be used to find the volume of the solid obtained by rotating the region bounded by y=x^3 , y=8, and x=0 about the x=-4. use disk/washer method.

asked by diego on May 6, 2013
52. ## calculus

Use the method of cylindrical shells to find the volume of the solid obtained by rotating the region bounded by the given curves about the x-axis. xy = 2, x = 0, y = 2, y = 4

asked by elaine on March 7, 2017
53. ## english

satirists use which of the follwoing techniques a. ignorance and humor b. exaggeration and irony c. emotion and investigation d. exploration and the scientific method i think it's B

asked by y912f on May 27, 2009
54. ## Math

Determine how many years it would take for the value of a car to depreciate to 25% of its original value, if the rate of depreciation, based on the reducing balance method, is 16 % per annum.

asked by Lesedi on February 9, 2016
55. ## calculus

Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about the specified axis. 27y = x3, y = 0, x = 6

asked by ama on September 11, 2012
56. ## Advanced Algebra

If the number m, 4m-8, m^2-6 are the first three terms of an arithmetic sequnce, what is m? I don't know what equation to start with. I tried getting the m from 4m-8 which is equal to 2 but the answer is different on m^2-6. Most likely my method is wrong.

asked by Dannie on June 25, 2015
57. ## statistics

Answer the following. Show your work to get credit. Exam scores are normally distributed with a mean of 81 and a standard deviation of 9. a) What is the minimum score one must have to be in the top 4% of the students taking the exam? b) What percentage of

asked by JAE on October 13, 2014
58. ## Math Statistics

Answer the following. Show your work to get credit. Exam scores are normally distributed with a mean of 81 and a standard deviation of 9. a) What is the minimum score one must have to be in the top 4% of the students taking the exam? b) What percentage of

asked by JAE on October 13, 2014
59. ## chemistry

a. Find the amount of solute based on this information Volume = 500 ml Concentration of solution= 15% (w/w) Solute (molar mass) = H2SO4 is 98.0g/mol b. Find the molar mass Amount of solute= 117.0g Volume of solution= 2.00L concentration of a solution= 1.0M

asked by vince11 on November 27, 2012
60. ## chemistry

a. Find the amount of solute based on this information Volume = 500 ml Concentration of solution= 15% (w/w) Solute (molar mass) = H2SO4 is 98.0g/mol b. Find the molar mass Amount of solute= 117.0g Volume of solution= 2.00L concentration of a solution= 1.0M

asked by vince11 on November 27, 2012
61. ## linear programing.

The cheesy company produces two types of cheese with extra sharp cheddar cheese. The cheese spreads are packaged in 120 ounce containers, which are then sold to distributors throughout northeast. The regular blend contains 80% mild cheddar and 20% extra

asked by cocobunniesfromhell on June 22, 2009

Tom buys a shirt for \$22.00 plus 7% sales tax. His cousin buys a shirt for \$18.00 plus 4% sales tax. a. How much do Tom and his cousin pay for the shirts? Show your work. b. Who spent more on tax? (3 points) Is my answer correct: B: Tom's cousin **I

asked by Delilah on December 5, 2012
63. ## Calc.

1000 yds of fence x 1000-x 1. Show that the area function to be maximized is A(x) = ( pi + 4 / 16pi) x^2-125x+62500 2. Show that the critical point of A(x) is x=1000pi/pi+4 3. 1000yds of fencing and y>2r, find the values of r and y that maximizes the area

asked by Al on April 18, 2012
64. ## Chemistry

The solubility of KCLO3 at 25 degree celcius is 10.9 per 100.g of h20. question: If 15 g are addded to 100 g of water at 25 degree celcius with stirring, how much of KCLO3 will dissolve? Is the solution saturated, unsaturated, or supersaturated? please

asked by Tammy on May 7, 2007
65. ## english

I got a question regarding my homework. The task is to find the mistakes in a given text but the last sentence confuses me so much that I lost the overview. I'll copy the sentence below and hope that someone can help me. "But to protect against children

asked by Leonie on October 26, 2014
66. ## Physics

A baseball is hit by Aaron Judge, a New York Yankees baseball team member, at an amazing velocity of 110 miles/hour at an angle of 35 degrees from the horizontal from home plate in Yankee Stadium in New York City. The baseball was initially launched from

asked by Brittany on October 3, 2017
67. ## Chemistry

Concentrated sulfuric acid is 18.4 molar and has a density of 1.84 grams per milliliter. After dilution with water to 5.20 molar the solution has a density of 1.38 grams per milliliter. This concentration of H2SO4 is often used in lead storage

asked by Kevin on January 9, 2011
68. ## chemistry

what are the steps for making 0.5 aqueous solution of MgCl2? What are the necessary steps to make this solution?

asked by maricel on April 25, 2012
69. ## Chemistry

A solution of concentrated NaOH is 16.4 M. If the density of the solution is 1.43 g/mL what is the percent by mass NaOH?

asked by Olivia on May 12, 2016
70. ## Chemistry

2)How to prepare 5.6 liter of 50 mM NaCL solution (mol wt 58.44) using 10% NaCL stock solution?

asked by Daniel on December 6, 2011
71. ## Chemistry

When investigating heat of solution of NaoH& NH4No3, what is the heat of solution of the two cpds?

asked by Mark on October 6, 2012
72. ## Chemistry

Prepare a 0.025M solution of Glucose by diluting a 1M Glucose solution. What and how much did you mix together?

asked by Pam on October 27, 2011
73. ## science

a solution is 40% in NAOH. calculate the mole fraction of NAOH if it is an aqoues solution

asked by Neeraj on April 5, 2012
74. ## Chemistry

Calculate the pH of a solution that is 0.124 M C2H5NH2 and 0.124 M C2H5NH3Cl. (Assume that the solution is at 25°C.)

asked by Margaret on March 13, 2013
75. ## chemistry

If 4.8 liters of a 2.8 M solution of NaCl then the solution will have *Blank* moles of NaCl dissolved in it.

asked by Griffin on May 27, 2014
76. ## chemistry

If you have 137.8 mL of a 38.4% aqueous solution of ethanol, what volumes of ethanol and water are in the solution?

asked by MaryBeth on November 4, 2010
77. ## Chemistry

What volume of a 6.0 M NaOH solution would you need to prepare 250.0 milliliters of a 3.0 M NaOH solution?

asked by Noemi on March 18, 2013
78. ## chemistry

A solution contains 5.00% (by mass)NaCl. The density of the solution is 1.064 g/cm^3. What is the molarity of NaCl?

asked by evelyn on November 19, 2012
79. ## Chemistry

A solution contains 0.00245 M HCl. Determine the [H3O+] for the solution. points Determine the [OH-]

asked by Sara on March 11, 2014
80. ## Chem 1

How can you prepare 2M of 200 ml HNO3 solution from 63% stock solution of HNO3 which has a density of 1.4 g/ml?

asked by Isaac on December 5, 2012
81. ## SCIENCE

A SOLUTION OF Nacl IN H2O HAS 3.80G NACL IN 1LITRE SOLUTION,WHAT IS MOLARITY?

asked by TSHOGANETSO on August 25, 2011
82. ## Chemistry

If you have 200ml of 25% aqueous solution of ethanol, what volume of ethanol and water are in the solution?

asked by JD on March 3, 2013
83. ## mes

a solution of sugar in water is 5% by mass. how much sugar is present in 250 gm. of solution?

asked by dona on June 25, 2011
84. ## chemistry

What volume of a 6.0 M NaOH solution would you need to prepare 250.0 milliliters of a 3.0 M NaOH solution?

asked by Anonymous on June 13, 2012
85. ## Chemistry

If 15.0ml of a 6.0M HCl solution is diluted to 75.00ml, what is the molarity of the diluted solution?

asked by jake on March 5, 2011
86. ## Chemistry

We are using a rotovap to evaporate Hexane from a solution. The temperature of the solution has to remain between 20 to 25 F. What the mm Hg has to be for Hexane?

asked by Chicago on August 30, 2011
87. ## chemistry

if 200.0 ml of 0.800 m is prepared from a 70.0 ml stock solution, what is the molarity of stock solution

asked by Anonymous on March 11, 2011
88. ## algebra

How much water should be added to 20oz of a 15% solution of alcohol to dilute it to s 10% alcohol solution?

asked by rhonda on February 24, 2012
89. ## Science

What volume of a 2.00 M HCL solution can be prepared by diluting 0.350L of 14.0 M HCl solution?

asked by Dana on December 5, 2016
90. ## chemistry

What volume of a 6.0 M NaOH solution would you need to prepare 250.0 milliliters of a 3.0 M NaOH solution?

asked by Anonymous on December 7, 2011
91. ## Chemistry

1.2g of NaCl as used to prepare 200 ml solution , what is the molar concentration of NaCl in solution ?

asked by Mariam on April 20, 2014
92. ## chemistry

If you have 137.8 mL of a 38.4% aqueous solution of ethanol, what volumes of ethanol and water are in the solution?

asked by MaryB on November 4, 2010
93. ## chemistry

What volume of a 6.0 M NaOH solution would you need to prepare 250.0 milliliters of a 3.0 M NaOH solution?

asked by alexis on December 21, 2012
94. ## Chemistry

To what volume should you dilute 124 mL of an 8.10 M CuCl2 solution so that 52.0 mL of the diluted solution contains 5.9 g CuCl2

asked by jay on August 4, 2010
95. ## science

if you need a 1 molar solution, then, you need 1 moles of sugar per liter of solution how many grams per Liter is that?

asked by Carson on December 19, 2018
96. ## Anatomy and Physiology

calculate the percent KBr in a solution containing 0.88 grams KBr per 800 mL solution.

asked by paul durlin on March 7, 2011
97. ## human resources

a chemist has 400 mililiters (mL) of solution that is 21% acid. How many mililiers of acid are in the solution

asked by carebear on May 16, 2008
98. ## chemistry

when 50 ml of an HNO3 solution is exactly neutralized by 150 ml of a 0.50 M solution of KOH, what s the concentration of HNO3

asked by bee on May 17, 2011
99. ## chemistry

How many mL of a 0.90% (m/v) NaCl stock solution will you need to to prepare 250 mL of a 0.225% m/v NaCl solution?

asked by nate on December 5, 2010
100. ## Chemistry

A solution is 5.5% (w/v) ethanol (C2H5OH, MW 46.07 g/mol). What is the molar concentration of ethanol in this solution?

asked by Morgan on March 27, 2019