# 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

91,330 questions, page 402
1. ## chemistry

What is the molarity (M) of a 627 mL solution that contains 12.7 g of ethanol, CH3CH2OH?

asked by Kara on October 12, 2011
2. ## Chemistry

What is the pH of a 0.05 M solution of acetic acid knowing that it was 2% ionized

asked by Sidney on May 28, 2016
3. ## maths-I only need the solution

x+y+√z=148 x+√y+z=82 √x+y+z=98 find x,y,z given that x,y,z are all positive integers. Please i need the solution #thanks

asked by P1 on April 21, 2016
4. ## Analytical Chemistry

principles behind the dilution and aliquoting of the NaOH solution

asked by Charie on September 13, 2014
5. ## Algebra

Which ordered pair is a solution of the equation y=x-3? (-2,5) (-5,2) (2,5) (5,2) I keep getting other answers :(

asked by Mari on June 6, 2016
6. ## Chemistry

How many g of sodium nitrate do I need to make one Liter of 15% m/v solution?

asked by Monica on October 10, 2010
7. ## chemistry

Determine the pH of a 1 M aniline solution (Kb = 4.2 10-10). I am unsure how to start, any help?

asked by Logan on November 13, 2015
8. ## Chemistry

What is the pH of a 0.001 M formic acid solution? Ka = 1.8 x 10^-4. I don't know what to do!

asked by Jakob on May 29, 2010
9. ## calculus

find the solution of the initial value problem y'=xye^x; y(1)=1

asked by Anonymous on April 10, 2012
10. ## pre-calc

is x=15 degrees a solution of radical 3/3 cos2x+sin2x=0

asked by larry on November 13, 2007
11. ## chemistry

How many moles of KBr are there in 35.8ml of a 0.172M solution?

asked by twynna on February 9, 2011
12. ## chemistry

what is a standard solution? and what is a function of an indicator in a titration?

asked by Nancy on March 5, 2011
13. ## chemistry

What is the pH of a 2.23 M HCHO2, formic acid, aqueous solution at 25 °C? ( Ka = 1.8E-4 )

asked by matt on March 4, 2011
14. ## Chemistry

What is the molar solubility of Fe(OH)3(s) in a solution that is buffered at pH 2.75? The Ksp of Fe(OH)3 is 6.3 × 10-38.

asked by Sarah on March 5, 2011
15. ## math help pls pls

Systems of equations with different slopes and different y-intercepts have more than one solution. Always Sometimes Never

asked by Oscar on December 2, 2015
16. ## Chemistry

How many equivalents are in 1.75L of a 8.2M solution of sulfuric acid.

asked by Sam on January 22, 2013
17. ## eng1511

an essay:the sure solution to unemployment is a better quality of education

asked by thandeka jaca on April 6, 2013
18. ## math

Use the intermediate value theorem to verity that x^4+X-3=0 has a solution in the interval(1,2)

asked by Anonymous on October 10, 2010
19. ## MATH

Perform the operation for each equation, if there is a solution (Matrices) [4k -8y ] [5k+6y 2k+1] [6z - 3x] - [2z+5x z+4] [2k + 5a] [4k+6a 3a+2]

asked by Daria on December 1, 2010
20. ## ap chemistry

Calculate the ratio of [NH3]/[NH4+] that gives a solution of pH = 10.60.

asked by gabriella on February 4, 2014
21. ## algebra

explain how you would know if your answer will be a solution or rational expression

asked by karon on December 14, 2011
22. ## Chemistry

What is the molar solubility of Fe(OH)3(s) in a solution that is buffered at pH 2.75? The Ksp of Fe(OH)3 is 6.3 × 10-38.

asked by Sarah on March 5, 2011
23. ## Scientific Notation

What is the solution to (3 x 10^2) x (5 x 10^5), written in scientific notation? a. 1.5 x 10^8 b. 15 x 10^8 c. 1.5 x 10^7 d. 15 x 10^7 ***?? Thank you for the one last time. I appreciate it. :)

asked by Prim on November 9, 2016
24. ## Chemistry

How many grams of NaCl will you need to mix 200ml of a 2.3M solution?

asked by Dennese on June 2, 2015
25. ## calculus

Find the general solution of the equation. 6t*dy/dt+y=sqrt (t),t>0.

asked by rebekah on June 27, 2016
26. ## Math

Does the term "one real solution" and "one root" mean the same thing

asked by Anonymous on February 7, 2017
27. ## math

4-(-3)+1/2-2/(-2) am having trouble with this problem. I got a 8.5 decimal are a fration of 8 1/2 am I right? are how do i come up with the solution

asked by cynthia on September 24, 2010
28. ## chemistry

what is the pH of an 0.155M aqueous solution of acetic acid if the Ka is 1.8 EE -5?

asked by Anonymous on December 1, 2010
29. ## chemistry

A scientist has 0.46 mL of a solution. How would she convert this volume to microliters?

asked by Sally on August 3, 2009
30. ## math

which is the solution for x in terms of the variables in the equation x/y -z = rw a) x=y (z+rw) b) x= z/y (rw) c) x= rw+yz d) x= y+1/2(rwz)

asked by Anonymous on January 18, 2011
31. ## chem

how many ml of 0.15 m naoh solution are required to neutralize 35.00 ml of 0.22 m hcl

asked by Anonymous on April 23, 2010
32. ## Math

Graph the solution set for the of linear inequalities. x−y≤4 x+3y≤4 x≥−5

asked by Keonn'a on October 18, 2018
33. ## chem

In 100. mL solution contain 5.0 mL of solute and 95 mL of a water. The concentration is

asked by Anonymous on October 17, 2012
34. ## Biology

You have been asked to make 200ml of 50% detergent solution (v/v). How would you do it?

asked by Anonymous on January 19, 2015
35. ## Science

What is the concentration of NH3 in 0.250M solution of NH4Cl?

asked by Jeet shah on March 31, 2015
36. ## Chemistry

How many grams of sodium hydroxide are dissolved in 0.02 of a 3.0 m solution?

asked by Sam on July 13, 2010
37. ## Chemistry

What concentration of of CN- is needed to produce the same POH as 3.5*10^-5M solution of BA(OH)2?

asked by Molly on March 2, 2015
38. ## chemistry

For the strong acid solution 9.7×10−3 , determine (H3o+)and (OH-)

asked by Jessica on May 2, 2012
39. ## science

Balance in acid solution PH3+ I2-> H3PO4+ I-

asked by Joseph on September 6, 2010
40. ## chem

What is the pH of a 0.36 M HCl solution? can someone help plz? I don't know how to go about figuring this out.

asked by Gulzaman on August 24, 2007
41. ## Chemistry

Calculate the pH of a solution that is 2.00 M HF, 1.00 M NaOH, and 0.704 M NaF. (Ka = 7.2 E -4)

asked by Schanee on December 17, 2008
42. ## Chemistry-Dr.Bob222

Determine [OH-] of a solution that is 0.135 M in CO3^2-. I got 0.00532.

asked by Nevaeh on April 4, 2016
43. ## chemistry

what are the reasons why the Cu(II) solution has to be titrated immediately after addition of KI?

asked by irma on January 31, 2008
44. ## ENG1511

an essay: of The sure solution to unemployment is a better quality of education?

asked by godfrey on February 28, 2013
45. ## Math DE

Find the general solution of the differential equation dy/dx-4y= -5y^2

asked by Cam on August 3, 2014
46. ## Chemistry

What concentration of of CN- is needed to produce the same POH as 3.5*10^-5M solution of BA(OH)2?

asked by Molly on March 2, 2015
47. ## chemistry

find the concentrations of Ca^2+ and F^- in a saturated solution of CaF_2_

asked by holly on March 9, 2013
48. ## math

which is the solution for x in terms of the variables in the equation x/y -z = rw a)x=y (z+rw) b)x=z/y (rw) c)x=rw+yz d)x=y+1/2(ryz)

asked by Anonymous on January 18, 2011
49. ## Science

How should the solution of the (Fe(H2O)5(SCN)2+ complex be disposed of?

asked by Okafor on September 15, 2014
50. ## Chemistry

How many grams of sodium hydroxide are dissolved in 0.02 of a 3.0 m solution?

asked by Sam on July 13, 2010
51. ## chemistry

For the strong acid solution 9.7×10−3 , determine (H3o+)and (OH-)

asked by Jessica on May 2, 2012
52. ## chemistry

calculate the concentration of ammonium nitrate solution.

asked by Anonymous on August 17, 2014
53. ## chemistery

in a solution of pH of 3.26, the molar concentration of the hydronium ion is ?

asked by ogb on December 9, 2012
54. ## chemistry

What is the molarity (M) of a 627 mL solution that contains 12.7 g of ethanol, CH3CH2OH?

asked by Kara on October 12, 2011
55. ## Chem

what is the pOH of a 0.12 M solution of pyridine (Kb=1.4x10^-9) at 25 Celsius

asked by C on March 19, 2013
56. ## chemistry

What is the molarity (M) of a 627 mL solution that contains 12.7 g of ethanol, CH3CH2OH?

asked by Kara on October 12, 2011
57. ## chemistry

What is the molarity (M) of a 627 mL solution that contains 12.7 g of ethanol, CH3CH2OH?

asked by Kara on October 12, 2011
58. ## chemistry

How many moles of KBr are there in 35.8ml of a 0.172M solution?

asked by twynna on February 9, 2011
59. ## Pre - Algebra

(4x^2-2x-1)-(-3x^3+2) I already know the answer is 3x^3+4x^2-2x-3 but I need someone to explain how to get to the solution. It would be greatly appreciated.

asked by EJ on June 5, 2018
60. ## chemistry

How does the saturation of a solution affect crystal formation?

61. ## Chemistry

Calculate the molarity of 15.4 g of ethanol (C12H22O11) in 71.0 mL of solution

asked by Kiana on February 27, 2011
62. ## chemistry

if i want to change the pH of any solution from 5 to 8 what the volume of NaOH 0.1 N needed

asked by mohamed on March 9, 2011
63. ## Chemistry

How many equivalents are in 1.75L of a 8.2M solution of sulfuric acid.

asked by Sam on January 22, 2013
64. ## Chemistry

What volume of 0.100 M K2S solution contains 3.5 g of the solute?

asked by Page on November 20, 2018
65. ## Algebra 2

Find the exact solutions of x^2 - (y - 12)^2 = 144 and y = -x^2. No solution?

asked by Lily on May 18, 2013

How many grams of KOH would be necessary to make 200 mL of a 0.15 M solution?

asked by debbie on April 23, 2010
67. ## math

How many milliliters of 0.4N NaOH can be made from 20ml of 2N solution

asked by Tee on October 5, 2013
68. ## chemistry

illustrate how to prepare a 1:3 solution of 0.5 hydrochloric acid

asked by Priscilla on December 4, 2016
69. ## math equation

determine whether -4 is a solution of the inequality x is greater than or equal to 4

asked by Lavern on December 3, 2011
70. ## chemistry

How many moles are there in 250cm3 0f 4M sodium chloride solution

asked by Gary on October 16, 2010
71. ## science

Why the solution of aluminium sulphate in water is not clear

asked by nidhi on January 1, 2017
72. ## chemistry

If 5.0g of Sodium Chloride in 250 mL of solution, what is the percent?

asked by meg on April 19, 2010
73. ## BioChemistry

how many moles of estradiol (mw = 272) are there in 2 ml of a 100 μm solution

asked by Alwxy on October 22, 2016
74. ## algebra

evaluate and leave the solution in scientific notation: (2 x 10^4)(5.1 X 10^2)

asked by tracy on October 19, 2011
75. ## Chemistry

What is the hydroxide ion concentration in a solution with [H3O-] = 7.67 x 10^-9M

asked by Anonymous on March 11, 2010
76. ## College Algebra

3x^4=648x someone help please im so confused. i am trying to find the solution set?

77. ## Science

Describe how you would prepare 25.0ml of a 1.00 M NaOH solution.

asked by Sandy on February 27, 2013
78. ## science

Why the solution of aluminium sulphate in water is not clear

asked by jerry on January 1, 2017
79. ## Chemistry

The boiling point of a solution or mixture is always ________?

asked by Ruffles on December 5, 2013
80. ## Chemistry

How would you precipitate BaCrO4 from a solution of Ba(NO3)2 and K2CrO7?

asked by Amy on March 9, 2014
81. ## Trig

Verify that 7pi/6 is a solution to 2sin2x–sinx=1.

asked by Tabitha on January 20, 2011
82. ## DIFFERENTIAL EQUATION

find the general solution .. Y=Asin4x+Bcos4x+x

asked by JAJA111111 on June 16, 2012
83. ## Chem

Assuming complete dissocaition, what is the pH of 4.93 mg/L BaOH2 solution

asked by Helena on February 21, 2014
84. ## Chemistry

In an aqueous solution the [OH–] is 2.0 x 10–6 M. What is the [H3O+]? Question 17 options: 1.0 x 10–7 M 2.0 x 10–6 M 1.0 x 10–8 M 5.0 x 10–9M

asked by Tamera on November 17, 2014
85. ## algebra

Graph the solution of each linear inequality. y

asked by janet on December 22, 2009
86. ## chemistry

you are right....I wrote it wrong. Does this mean that the solution will be more toward the redish side?

asked by George on July 18, 2010
87. ## maths

give the solution of the initial-value problem dy/dx=(1+2cos^2(x))/y, (y > 0), y= 1 when x = 0. Thanks.

asked by olek on May 13, 2011
88. ## physical science

What is the pH of a 0.01 M solution of the strong acid HNO3 in water?

asked by breiann on January 23, 2012
89. ## chemistry

Calculate the pH after 0.15 mol of NaOH is added to 1.00 L of the solution that is 0.50 M HF and 1.01 M KF

asked by kyle on March 25, 2011
90. ## algebra

How big is the solution set for an equation that cannot be solved

asked by Justin on September 9, 2010
91. ## maths

give the solution of the initial-value problem dx/dy=(1+2cos^2(x))/y, (y > 0), y= 1 when x = 0. Thanks.

asked by olek on May 12, 2011
92. ## science

What is the pH of the solution created by combining 11.20 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)?

asked by sara on May 5, 2008
93. ## Jkr public school

mole fraction of solute is 0.4 what is molality of solution

asked by Manish on July 22, 2015
94. ## mathematics-abstract equations

x+y+√z=148 x+√y+z=82 √x+y+z=98 find x,y,z given that x,y,z are all positive integers. Please i need the solution #thanks

asked by P1 on April 20, 2016
95. ## chem class

What is the concentration (in M) of hydroxide ions in a solution at 25°C with pH = 4.282?

asked by ben on November 23, 2010
96. ## math

3. Determine which ordered pair is a solution of y = –5x + 10. (1 point) (–15, 5) (2, 0)++ (–1, –5) (3, 25)

asked by dori on March 15, 2019
97. ## chemistry

How many milliliters of a 0.50 M solution contain 14.0 g of BaCl2 (Barium Chloride)?

asked by Emily on September 14, 2010
98. ## Math

Determine the solution to the initial value differential equation: y′+2*y^2*e^(5*x)= 0 y(0)=2

asked by AK on October 21, 2009
99. ## chemistry

what is the mass of LiF is needed to produce 2.5 L of a .30 M solution

asked by Anonymous on April 10, 2013
100. ## Chemistry 2

What is the molarity of 50.0 mL solution of aluminum sulfite that contains 80.0 g of this salt? (Al=27.0, S=32.0,O=16.0)

asked by Ivan on March 3, 2014