# 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 407
1. ## trigonometry

is the value 3pi/2 is a solution for the equation 2sin^2x-sinx-1=0

asked by Dakeva on August 4, 2011
2. ## Science

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

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

how do you make 400 ml pf 2 Osm solution of Mg CL2?

asked by dee on January 27, 2016
4. ## Chemistry

What is the pOH of a 0.2M buffer solution of NH 4 + 0.2M NH4NO3 at 25 ° C. PKP = 4.74

asked by Nayara on January 26, 2016
5. ## Chemistry

H+(aq)+OH-(aq) =H2O(I) delta H -56.2 kJ final temp od solution?

asked by Naomi on January 26, 2010
6. ## maths

Write the solution of the pair of linear equations 4x + 2y = 5 and x -2y=0

asked by janvi on January 9, 2017
7. ## chemistry

Why are hydrogen ions NEVER found in an aqueous solution?

asked by kelly on May 7, 2012
8. ## chm

how does CO2 affect the titer of a solution of NaOH ?

asked by josh on September 13, 2014
9. ## Analytical Chemistry

principles behind the dilution and aliquoting of the NaOH solution

asked by Charie on September 13, 2014
10. ## Math

Find all real Solution: 2x^3-7x^2-98x-343

asked by thomas on February 8, 2012
11. ## science

what are the example of suspension,colloid and solution found in your house

asked by geraldine on July 11, 2009
12. ## linear algebra

these equation are certain to have the solution x=y=0 for which values of c is there a whole line of solutions? cx+2y=0 2x+ay=0

asked by chad on October 6, 2010
13. ## Algebra

Find five solution sets for the linear equation 3x - 5y = 15.

asked by Elizabeth on February 17, 2015
14. ## chemistry

Calculate the pH of a 2.5x10-5 M lithium hydroxide solution.

asked by Liz on May 2, 2012
15. ## CHEM 1412 general

What is the pH of a solution that is 0.0 100 M in HClO and 0.0300 M in NaClO

asked by chemistryhelpneeded on April 30, 2012
16. ## Chemistry

What is the freezing point of a 0.5m aqueous solution of C6H12O6?

asked by Georgette on January 18, 2011
17. ## 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
18. ## Chemistry URGENT

Help. what is the formula to figure out the total mass of a solution?

asked by jazz on April 28, 2014
19. ## 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
20. ## science

Explain how you would prepare a sulphuric acid solution.

asked by Chali on May 12, 2016
21. ## Chemisty

How many grams of HNO3 will be contained in 300 mL of a 5 N solution?

asked by Nelson on January 30, 2017
22. ## Trigonometry

the number of solution of |sinx| = |cos3x| in the interval (-2π,3π)

asked by Gaurav on January 31, 2017
23. ## algebra. help!

Is 4x-3=19 true, false, or open? Which of the following is a solution to the equation 16=4x-4? a. -5 b. -4 c. 5 d. 16

asked by Hannah on September 24, 2014
24. ## Chemistry

calculate [H] and [OH] for a .01M calcium hydroxide solution?

asked by Morgan on May 20, 2012
25. ## PreCal

Find all solutions to the equation, x-8(sqrt x)+16=0. Is x=16 the only solution?

asked by Terri on November 30, 2013
26. ## Chemistry

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

asked by Dennese on June 2, 2015
27. ## algebra

determine whether the ordered pair is a solution of the inequality (-8,5);4x+y

asked by Julie S. on July 26, 2011
28. ## General chemistry

Calculate the molarity of 500.0 ml solution containing 26.5g Na2CO3

asked by Chin on January 23, 2017
29. ## science

Why the solution of aluminium sulphate in water is not clear

asked by jerry on January 1, 2017
30. ## chemistry

Calculate the molarity of 2.05 L of a solution containing 1.51 g of dissolved KBr

asked by jessica on February 9, 2012
31. ## lab

How much 38%Hcl will be used to prepare N/3.05 solution in 2litre water.

asked by abc on January 18, 2013
32. ## science

Why the solution of aluminium sulphate in water is not clear

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

Calculate the pH of a saturated solution of Sr(OH)2. The Ksp for Sr(OH)2 is 3.2x10^-4.

asked by Aly on February 15, 2015
34. ## chemsitry

the ph of a .030M C2H5 COOH solution is 3.20. What is this acids Ka?

asked by ryan on May 12, 2012

Write the inequality that represents the solution set for −20/11 y > −9/17.

asked by 15634 on November 14, 2013
36. ## math

y=5x+7 and 3y-15x=18 they want to know how many solutions does the equation have. i got no solution. check for me please? :)

asked by prisoner on January 25, 2017
37. ## Chemistry

Can a solution of CrCl3 be stored in an aluminum container?

asked by Jake on May 15, 2012
38. ## science

what is the nature of solute particles in electrolyte solution?

asked by julmuner ibrahim on February 11, 2012
39. ## Trig

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

asked by Tabitha on January 20, 2011
40. ## Algebra I

Fill in the compound inequality 4(x-6) 2(x-10) and 5(x + 2) >/ 2(x +8) with less than, greater than, at least, or at most so that the solution is only one value

asked by Tonya on October 7, 2014
41. ## 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
42. ## chemistry

Can a solution of CrCl3 be stored in an aluminum container?

asked by lea on May 11, 2013
43. ## math

Prove that sinx=x for x is a real number has only one solution at x=0

asked by Andre on February 15, 2016
44. ## Jkr public school

mole fraction of solute is 0.4 what is molality of solution

asked by Manish on July 22, 2015
45. ## Chemistry

the pH of 10.00 mL of 0.100 M HCl after adding 10.00 mL of indicator solution

asked by Kev on June 12, 2011
46. ## math

am i correct? Determine which ordered pair is a solution of y= -5x + 10 a. (-15, 5)***** b.(2,0) c.(-1,-5) d.(3,25)

asked by ShannonPanda on April 17, 2018
47. ## chemistry

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

asked by twynna on February 13, 2011
48. ## Chemistry 12

How do we determine the specific gravity of a solution? and what unit is it in?

asked by JM on September 18, 2011
49. ## Math 116 A

7X+4>-13 or 9x+4>-23 The solution of the compound inequality is ? I am totally lost!!!!!!!!

asked by katie on September 22, 2011
50. ## algebra

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

asked by Justin on September 9, 2010
51. ## chemistery

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

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

how do you get the percent of a solution that is 2.5 ml copper sulfate and 7.5 ml water?

asked by Emma on December 15, 2009
53. ## NEED help ON MATH PLZ

Graph the solution set on a number line : 3x+4>-8

asked by David on December 12, 2012
54. ## Chemistry

1. What is the pH of a 0.085 M solution of nitrous acid (HNO2) that has a Ka of 4.5 × 10-4? 2.21 5.33 3.35 4.42

asked by Esmerelda on May 5, 2018
55. ## Chemistry

What is the mass of ethylene gycol dissolved in 5.00 kg of a 40.0% solution?

asked by Nicole on May 4, 2013
56. ## chemistry

what is the final M solution prepared by diluting 5.0 mL of 6.0 M HCl to 60.0 mL

asked by Elizabeth on October 13, 2014
57. ## MATH I just need explanation very easy ( for you)

Completing the Squares F(x) =x^2+3x+2 F(x)=0 X^2+3x+2=0 WHY DIDN'T IT BECOME -X^2-3X-2 ? ( EXPLAIN THIS PLEASE) Next for the solution X^2+3x+3(3/2)^2 = -2+(3/2)^2 (X+3/2)^2=-2+9/4 (X+3/2)^2 = 9/4 -8/4 =1/4 ( WHERE DID THEY GET 8/ 4?

asked by Miracle on February 15, 2016
58. ## Physics -HS Honors

When computing the gravitation force, how do you know what the direction of the solution?

asked by Joan on March 11, 2008
59. ## Science

A solution has been prepared by dissolving 0.63 g of HNO3 in 100 ml.What is its pH value ?

asked by Anindita on December 8, 2016
60. ## chemistry

what is the mass of 20mL of a solution that has a specific gravity of 1.69

asked by john on August 30, 2011
61. ## chdem

What is the pH of the solution created by combining 2.70 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq

asked by Anonymous on August 20, 2008
62. ## chemistry

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

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

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

asked by twynna on February 9, 2011
64. ## math

Write a proportion that is a different form of the following but will still yield the same solution: 3/4 = x/2

asked by poo on December 13, 2009
65. ## chemistry

How would your calculated %P2O5 value be affected if you had not used this blank solution

asked by sami on December 4, 2015
66. ## Chemistry

What is the osmolality of 1.1% NaCl salt solution? How can I calculate this?

asked by Mirza on April 27, 2016
67. ## math

give exact and approximate solution to the third decimal (x-6)^=18

asked by tami on July 7, 2012
68. ## math - inequalities

How many integers are common to the solution sets of both inequalities? x+7 ≥ 3x 3x+4 ≤ 5x

asked by Maggie on December 14, 2013
69. ## Chemistry

how do I do this problem 0.700 mol of Na2S in 1.55 of solution?

asked by Sam on October 17, 2013
70. ## chemistry

Calculate the pH of a 0.35 M solution of dimethylamine, (CH3)2NH.

asked by donna on December 7, 2009
71. ## chemistry

calculate the concentration of ammonium nitrate solution.

asked by Anonymous on August 17, 2014
72. ## Math

Using substitution, tell whether the ordered pair is a solution to the equation: y=5x;(15,-3)

asked by Amy on September 26, 2016
73. ## Chemistry

A detergent solution has a pH of 11.63 at 25°C. What is the hydroxide-ion [OH-] concentration?

asked by S on February 21, 2012
74. ## chemistry

these is 0.1M HCl of 100ml of that solution in a beaker,calculate pH?

asked by kabelo on February 12, 2011
75. ## biochemistry

What is the concentration of H+ in a solution of 0.2 M NaOH? i got [H+] = 5x10^-14, is this correct? all i did was [H+][OH-] = Kw

asked by Maria on March 18, 2017
76. ## science

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

asked by Joseph on September 6, 2010
77. ## math

How to find the solution set in a+bi form for this equation? 6x^2+4x+1=0 PLEASE HELP!THANKS!!!!

asked by Momi on February 22, 2008
78. ## Math 116a

7X+4>-13 or 9x+4>-23 The solution of the compound inequality is ? I am totally lost!!!!!!!!

asked by katie on September 22, 2011
79. ## chemistry

What is the molality of a solution containing 7.8 g of MgCl2 in 725 g of water?

asked by gigi on July 1, 2012
80. ## math

Compound Interest formula solution P[1+r/100]t?

asked by Subham on March 25, 2017
81. ## chemistry

What is the pH of a saturated solution of silver hydroxide, given Ksp =1.56*10^-8

asked by Victoria on December 7, 2012
82. ## Chemistry

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

asked by Anonymous on March 11, 2010
83. ## math

find x if (x,-2) is a solution to the equation 3x+2y=-7. my answer was x=1 but it was wrong.

asked by Anonymous on August 20, 2014
84. ## Genral Chemistry

What are the pOH and pH of a 0.0125M solution of potassium KOH

asked by Anonymous on April 17, 2012
85. ## math

If E,N,O,T,and W each represent a different integer, can you find more than on solution to this problem?

asked by christy on February 10, 2011
86. ## Algebra 2 Rational Equations

What is the solution set of the equation? I know the answer is {-1} I just don't know how to get there. X^2-16 x-3 --------- = ------- -1 (x+4)(x+2) (x+2)

asked by Josh on December 6, 2012
87. ## chemistry

how many grams of sodium chloride are there in 2.5 L of a 0.4% w/v solution?. need to know how to figure this out

asked by wendy on January 28, 2011
88. ## Chemistry

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

asked by Sam on January 22, 2013
89. ## science

what is the molarity of a solution of 232 g of NaCl in 2.1 of water?

asked by willie on January 8, 2013
90. ## Civics and Economics

what was the problem and solution in the Electoral College Compromise?

asked by Tweety on September 14, 2010
91. ## 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
92. ## Chem

How would I make a 0.25M solution of sodium bisulfite?

asked by Talia on June 28, 2011
93. ## math

describe a solution in which you would use more than one unit to measure length. tell why?

asked by lerne on January 4, 2010
94. ## AP Chemistry

calculate the ph of a 0.10 M CoCl3 solution. The ka value for Co(H20)6 is 1.0x10^-5

asked by Anonymous on February 25, 2010
95. ## chemistry

10.3 gm NaBr is solved in 50 ml of water. What will be the molality of solution?

asked by samarth on June 26, 2011
96. ## algebra

Graph the solution of each linear inequality. y

asked by janet on December 22, 2009
97. ## algebra 11

How do you write the solution to represent the point if intersection?

asked by katie on September 13, 2011
98. ## math

Write the inequality that represents the solution set for −15/9 y

asked by z on February 20, 2017
99. ## Statistics

What would be an example with solution of the Poisson distribution in the frequency of repurchases?

asked by Patte on May 21, 2018
100. ## chemistry

How many moles of ions are contained in 1.4 L of a 1.6 M solution of Mg(NO3)2?

asked by megan on April 24, 2012