# 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 537
1. ## English

1. Are you driving after work. 2. Will you drive after work. (Does #1 mean #2?) 3. Are you driving tonight? 4. Will you drive tonight? 5. Shall you drive tonight? (Does #3 mean #4 or #5?)

asked by rfvv on May 17, 2016
2. ## BUSINESS CONSULTING

C10; Introduction to Computers Assignment 8; Business Consulting Remember Bill? He was the gentleman that you helped to start up his business in week 4. Well his business is doing well, but he has come to you with some questions and concerns. You discuss

asked by VI GIRL on August 25, 2015
3. ## Algebra

Could you please check my work on these word problems? My solutions just don't seem right, could you please let me know where I may have messed up. Many people know that the weight of an object varies on different planets, but did you know that the weight

asked by asd on September 19, 2010
4. ## math

Please someone show me how to work this one out? Suppose Caroline is a cinephile and buys only movie tickets. Caroline deposits \$3000 in a bank acct that pays an annual interest rate of 20%. You can assume that this interest rate is fixed-that is, it

asked by nan on February 26, 2012
5. ## chemistry

calculate the volume of concentrated 4M HCl that is needed to create a 1 L solution of 0.1 M HCl.

asked by keira on January 28, 2015
6. ## Math

If the equation sinx+cosx=m processes solution then range of the range of values of m is given by?

asked by Abhinaya on September 30, 2016
7. ## chemistry

How many Liters of H2 are produced if 3 liters of a 4M solution of H3PO4 decompose at 25oC and 1.05atm?

asked by Shawna on February 18, 2015
8. ## Chemistry

How many moles of K2O are present in 40.0 mL of a 0.3 M K2O solution? I also need the formula, data, and answer.

asked by Jaret on October 10, 2013
9. ## chemistry

how many grams of cacl2 are needed to prepare 6.00L of a 0.400M CaCl2 solution

asked by jen on May 30, 2015
10. ## Chemistry

How do I calculate the solubility of a compound in grams of solute per 100 grams of solution?

asked by Matt on April 16, 2011
11. ## chemistry

calculate how many mL of 6M HCL are needed to prepare 100mL HCL solution with a concentration of ~1M?

asked by jj on October 10, 2011
12. ## Economics

whats the solution of Qd=2(60-p) Qs=3p whats the quantity and price for this demand and supply function?

asked by Susan brown on June 5, 2019
13. ## chamistry

how do you calculate the mole fraction of HCl in an acqueous solution that contains 33.6% HCl by mass?

asked by franco on February 23, 2011
14. ## Chem

Calculate the pH of a solution made by combining 40.0 ml of a 0.14 molar HBrO and 5.0 ml of 0.56 molar NaOH

asked by Vee on March 31, 2014
15. ## Chemistry

What is the pH of a 0.94 M solution of HBrO that is also 0.59 M in magnesium hypobromite, the salt of it's conjugate base? The Ka for HBrO = 2.8 X 10-9.

asked by Carl on February 23, 2011
16. ## Chemistry

How many grams of Fe(NO3)2 are present in 555mL of a 0.650 M solution of Fe(NO3)2?? I have no clue what to do??

asked by Ocean on June 21, 2015
17. ## Chemistry

How do I prepare 80 mL of 0.10 M HC2H3O2 from a 6.0 M solution of Acetic acid? How do I prepare 80 mL of 0.10 M NH3 from 6.0 M ammonia?

asked by knswimmerkat on February 24, 2011
18. ## algebra

simplify the following radical expression: 4 sqrt(625) a) sqrt (25) b) 25 c)5 d) no solution exists c

asked by anthony on June 25, 2010
19. ## Precalculus

Which value for x is a solution to cosx = sqrt of 2/2? a) -9pi/4 b) 3pi/4 c) -3pi/4 d) 4pi/3 What is the first step I should do?

asked by Jake on January 24, 2012
20. ## Math

Plz give me solution The c.p of 13 chairs is the same as the s.p of 18 chairs.find the gain or loss %

asked by Simran on January 9, 2013
21. ## Chemistry

What is the molar solubility of Mg(OH)2 in a solution containing 0,10 M NH3 ? Ksp Mg(OH)2 = 1.2x10^-11 Kp NH3 = 1.8x10^-5

asked by Kevin on April 18, 2016
22. ## biochemistry

Calculate the pH of a solution made by adding 75.0 g of CH3COONa to 750 mL of 0.64 M CH3COOH. Ka for CH3COOH is 1.8 x 10-5.

asked by nurul on March 9, 2015
23. ## Calculus

Find the point on the line 6x + y = 9 that is closest to the point (-3,1). Solution: We need to minimize the function d =

asked by Manny on December 9, 2009
24. ## Science

If you mix 40.0 grams of Cu with 50.0ml of 1.20 M HNO3 solution, how many grams of NO gas can be made?

asked by Ashley on November 7, 2011
25. ## chemistry

A 40 mL sample of 0.25 M NaCHOO is titrated with 0.2 M HCl. What is the pH of the solution after 140 mL of HCl has been added?

asked by Eddy on March 2, 2011
26. ## Calc

Find the point on the line –2x+2y–3=0 which is closest to the point (–4–4). Please provide solution. ( , ) Thanks guys!

asked by Issac on March 15, 2014
27. ## Math

Find the point on the line 6x + y = 9 that is closest to the point (-3,1). Solution: We need to minimize the function d =

asked by Manny on December 9, 2009
28. ## chemistry

what is a titration of 25 ml of 0.15 M HCLO2 is performed with 0.15 M NaOH. What is the pH of the solution after 25 ml of naOH have been titrated? Ka = 0.011

asked by auriane on August 12, 2013
29. ## chemistry

How many milliliters of a stock solution of 5.40 M HNO_3 would you have to use to prepare 0.150 L of 0.510 M HNO_3?

asked by jeff on September 27, 2011
30. ## Chemistry

What is [OH-] of a solution containing 013 mol Ba(OH)2 and .021 mol KOH in .50L of H2O?

asked by donna on November 13, 2010
31. ## Chemistry

how many grams of sucrose are needed to make 100 ml of a 10^-2 Molarity sucrose solution?

asked by Ty on August 28, 2011
32. ## Science

What is the percentage by mass of glucose in a solution which contains 18gm of glucose and 250 gm of water

asked by Hitesh on July 10, 2017
33. ## chemistry

To what volume must 10.0ml of 5.00 M HCL be diluted to make a 0.500 M HCL solution ?

asked by Anonymous on September 18, 2011
34. ## chemistry

What is the original molarity of an aqueous solution of ammonia (NH3) whose pH is 11.10 at 25 degrees C? (Kb for NH3=1.8 x 10^-5)

asked by Natalie on December 8, 2010
35. ## chemistry

how many drops of 0.5M NaOH are needed to neutralize 10 drops of 1.0M HCl? What would be the pH of the neutral solution?

asked by kristy on May 2, 2010
36. ## chemistry

HF acid ionization constant (Ka) is 3.5 X 10-4. In a solution of HF acid @ equilibrium [H+] = 0.090 M. What is the concentration of F-?

asked by Cynthia on May 28, 2010
37. ## Calculus

Find the real solutions of this equation. If there is no real solution enter NONE. (3X+1)^1/2=8 Is the answer 2.93

asked by Hamilton on August 23, 2008
38. ## chem

How many grams of KBR, could be recovered by evaporating 650 g of a 15.0% KBr solution of dryness?

asked by tracy on November 21, 2012
39. ## science

20 gm of an acid furnishes 0.5 mole or HNO3+ iONS in its aq solution .the value of 1 eqyivalent if the acid will be

asked by babli gupta on August 25, 2017
40. ## Chemistry

Calculate the mole fraction of Benzene in a solution containing 30% by mass of Benzene in CCl4?

asked by Gash on March 2, 2019
41. ## chemistry

What is the percent by mass of NaHCO3 in a solution containing 60 g of NaHCO3 dissolved in 500 mL of H2O

asked by brooke on March 23, 2011
42. ## Chemistry

what is the Fe concentration in ppm of a 10.00mL of 500 ppm Fe solution which has been diluted to 100ml?

asked by anonymous on April 18, 2012
43. ## chemistry

How many milliliters of a stock solution of 12.0M HNO3 would you have to use to prepare 0.400M of 0.390 HNO3 ?

asked by riah on September 25, 2010
44. ## math

x+y+√z=148 x+√y+z=82 √x+y+z=98 find x,y,z. Please give full solution and how to find with complete logic.

asked by Muhammad Shaudddin on December 22, 2016
45. ## chemistry 101

How many grams of NaCl are dissolved in 250 grams of normal saline solution

asked by mm on October 1, 2010
46. ## chemistry

what is the mass of oxalic acid required to prepare 250cm3 of a 1.5M solution of the acid

asked by Nalukyamuzi on August 2, 2018
47. ## chemistry

Estimate the pH of the solution that results when this added to 50 mL of 0.275 M Na2HPO4(aq) - 50 mL of 0.275 M HCl(aq)

asked by tevon on April 3, 2015
48. ## dilution please help

How to use serial dilution to dilute a stock solution at 15000 fold dilution?

asked by John on February 16, 2013
49. ## Chemistry

Calculate the mass (in grams) of sugar, C12H22O11, in 166.4 mL of a 1.79 M solution of sugar.

asked by Leigh on July 19, 2013
50. ## science

find the PH of a .00580 M solution of the strong base KOH. is it -log(.00580)=2.24

asked by chris on March 22, 2007
51. ## chem 2

What is the concentration of the final solution if 1 liter of 6 M HCl is diluted to a final volume of 2 L?

asked by don on November 22, 2012
52. ## chemistry

molarity of kmno4 and strength of kmno4 in M/25 solution experiment of oxalic acid.......

asked by rishabh on January 23, 2013
53. ## Chemistry

11 mL of 0.0100 M HCl are added to 25 mL of 0.0100 M acetic acid. What is the pH of the resulting solution?

asked by A on October 13, 2018
54. ## Chemistry

Will the aqueous solution of titanium(II) chloride and beryllium chloride be colored or colorless?

asked by Colby on November 7, 2011
55. ## Chemistry

calculate the concentrations of H2S04, H30+, HSO4- and SO42- in 0.4 M H2S04 solution

asked by Johnny on November 27, 2016
56. ## Chemistry

Calculate how many grams of the substance and how many grams of water is in a solution of 400g with a concentration of a 30%

asked by David on August 15, 2016
57. ## algebra 1

Reiny I posted a question earlier (about 3:00) and I have a question about your solution. How did you get -4x? I came up with -8x which does not allow for anymore reduction. Please let me know how you did it. Thanks!

asked by Dippy on March 9, 2009
58. ## Chemistry

Determine the pH of a .50 M solution of H2S04 and also determine the concentration of the sulfate ion (SO42-)

asked by Hoot on July 31, 2011
59. ## chem

What volumes of 0.53 M HNO2 and 0.46 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH = 3.55? HNO2

asked by jacky on March 14, 2010
60. ## New Buffalo High

how many milliliters of a stock solution of 2.00 M KNO3 would you need to prepare 100.0 mL of 0.150 M KNO3?

asked by Nikki on May 5, 2010
61. ## Science

The pH of a 0.10-M solution of caffeine is 11.16. Determine Kb for caffeine from these data: C8H10N4O2(aq)+H2O(l) ⇌ C8H10N4O2H+(aq)+OH−(aq)

asked by Anonymous on March 11, 2016
62. ## chemistry

if Kf for water is 1.86 geg mol-1, a 0.1m solution of NaCl in water will have freezing point of

asked by pratik on April 23, 2012
63. ## Chemistry

What volume, in milliliters, of a stock solution of 2.55 M NaOH would you have to use to prepare 1.00 L of a 0.500 M NaOH?

asked by Billy on October 17, 2018
64. ## chemistry-buffer

Buffer question: If I add 3 mL of 1 M NaOH to a buffered solution, will I still have a valid buffer?

asked by student on February 4, 2008
65. ## chemistry

A solution is labeled 85.6 g HCl per 480 g of water,calculate the molality and % HCl by wt.

asked by 12 on October 16, 2013
66. ## chemistry

the molecular weight of MgCl2 is 95.21. how much MgCl2 would you need to make up 50 mL of a 1x10^-3 molar solution?

asked by Anonymous on January 30, 2012
67. ## chemistry

how many grams of sodium phosphate were dissolved in 382 grams of water in a 6.0 m solution

asked by ana on May 3, 2012
68. ## Stem

Calculate the pH of the solution resulting from the addition of 20.0 mL of 0.100 M NaOH to 30.0 mL of 0.100 M HNO3. (a) 1.35 (b) 1.70 (c) 1.95 (d) 2.52

asked by Anonymous on January 6, 2017
69. ## Chemistry

What mass of solution containing 6.50% sodium sulfate N2SO4 by mass contains 1.50g Na2SO4

asked by Lauren on February 4, 2008
70. ## chemistry

what is the molal concentration of tin in a solution of 5.000g of tin dissolved in 95.00 g of copper?

asked by jeanne on April 30, 2013
71. ## algebra

simplify the following radical expression : 4 sqrt (625) a) 25 b) sqrt (25) c) 5 d) no solution exists i think a

asked by anthony on June 18, 2010
72. ## Math

For this inequality 3x^(2) - 2x -1 > or equal 0 I get x=1 , x=-1/3 would the solution set become {x|1 < x < -1/3} I wasn't sure about the sign, if it should be greater than or equal to .

asked by Amy~ on September 28, 2010
73. ## chemistry

A solution is labeled 85.6 g HCl per 480 g of water,calculate the molality and % HCl by wt.

asked by 12 on October 16, 2013
74. ## Chemistry

What is the mole fraction of ethanol, C2H5OH, in an aqueous solution that is 50.0% ethanol by mass?

asked by Devon on August 22, 2016
75. ## college biology

Whis solutions were hypertonis to the egg? All solutions contain too millitiers of sucrose solution. 15% 25% 30% 40 % and 50%

asked by saleem on March 21, 2009
76. ## College Chemistry

Which solution would have the lowest freezing point, 0.500 M NaCl or 0.500 M CaCl2?

asked by Sa ndra on December 8, 2010
77. ## chemistry

Determine [Zn2 ], [CN–], and [HCN] in a saturated solution of Zn(CN)2 with a fixed pH of 1.78. The Ksp for Zn(CN)2 is 3.0 × 10–16. The Ka for HCN is 6.2 × 10–10.

asked by Jackie on March 23, 2013
78. ## Chemistry

Describe the preparation of 500 ml of 0.25 M solution of NaOH from NaOH pellets (88% purity).

asked by Caroline on February 1, 2018
79. ## Chemistry

Determine the mass (in grams) of a 1% solution of Manganese(II) Sulfate that will contain 0.0403 grams.

asked by Bethany on February 1, 2015
80. ## Chemistry

How many moles of silver will be deposited from a silver (i) trioxonitrate (v) solution by 16.0g of copper (Ag=108,Cu=63.5)

asked by Gift on May 31, 2016
81. ## Chemistry

If 20.2 mL of base are required to neutralize 29.3 mL of the acid, what is the molarity of the nitric acid solution?

asked by Rachel on February 10, 2015
82. ## College Algebra

For parts (a)–(c) use the following equation: y = 2/(x + 6). (a) Find the ordered pair that represents a solution to the equation when the value of x is 0.

asked by Autumn on September 7, 2008
83. ## CHEM

how many milliliters of a stock solution of 6.0 m hno3 would you have to use to prepare 110mL of 0.500 M HNO3?

asked by Ambra on July 14, 2014
84. ## Algebra

What value(s) of x make each of these undefined? #1: 25x-x^2 my answer: x=0 and x=25 #2: 5x^2-3x-2 my answer: x=1 Are these both correct? Isn't there another solution for #2, or is the only one x=1?

asked by Anonymous on September 22, 2009
85. ## CHEMISTRY HELP PLEASE!!!

The solubility of AgCl(s) in water at 25 C is 1.33x10^-5 M and its delta H of solution is 65.7 kJ/mol . What is its solubility at 60.1 C ?

asked by vanessa on March 23, 2013
86. ## chemistery

you have 2.00kg of KCL dissolved in 0.600L of H2O what is the percent solution of KCL(w/v)?

asked by tracy on April 24, 2013
87. ## Chemistry

The Ka of a monoprotic weak acid is 3.29 × 10-3. What is the percent ionization of a 0.176 M solution of this acid?

asked by Piper on September 27, 2012
88. ## Chemistry

A 25.00 mL sample of HCl was titrated with 35.79 mL of 0.250 M KOH. The concentration of the HCl solution is:

asked by Kay on April 6, 2015
89. ## chemistry

You measure the pH of a 0.50 M unknown acid solution using a pH meter and it is found to be 1.74. What is Ka for the acid? I know ph=-log{H+} Where do I go from here?

asked by anon on March 31, 2015
90. ## Chemistry Grade 12

If the concentration of I^-1 is found to be 2.4 x 10^-3 mol/L in a saturated solution of PbI2. What is the Ksp of PbI2?

asked by Kevin on July 28, 2016
91. ## chemistry

How many milliliters of 1.50 M \rm KOH solution are needed to provide 0.140 mol of \rm KOH

asked by betty on September 18, 2010
92. ## Chemistry 105

What is the weight/ weight% of a solution made by dissolving 12.0g of NaC1 in 100.0 g of water?

asked by Mira on November 25, 2012
93. ## chemistry

a buffer is a substance which? a) accepts OH- in basic solution b) accepts H+ in acid solutions

asked by alex on September 26, 2012
94. ## math

answer and solution of lucy had 2 1/2 apples.she cut into fourths. if she had enough fourths for herself and the friends with her, how many of them were there?

asked by viene on January 7, 2015
95. ## CHEMISTRY

Can a substance made of zinc be coated by nickel , using nickel nitrate solution ? How ?

asked by MAD on July 10, 2014
96. ## Chemistry

What is the molar concentration of nitrate ions in a 0.161M magnesium nitrate(aq) solution?

asked by Amber on October 22, 2012
97. ## chemistry

16.5 mL of 2.5 M sodium sulfate is mixed with 35.5 mL of 4.5 M sodium nitrate. What is the concentration of all ions in the new solution?

asked by Marissa on April 7, 2015
98. ## Chemistry

How many milliliters of 7.00M HCl solution are needed to obtain 0.200mol of HCl?

asked by Chris on October 15, 2012
99. ## Math

How to write expression by writing the solution in unit form and in standard form

asked by Anthony on August 20, 2018
100. ## Chemistry

HF + NaOH =NaF + H2O What will be the pH of a solution produced when 40 mL of 0.25 M HF is titrated with 80 mL of 0.125M NaOH? Ka for HF is 3.5*10^-4

asked by Kristen on April 21, 2012