# 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 365
1. ## Chemistry

Determine the [OH−] in a 0.42 M solution of HClO4

asked by Kiara on May 12, 2018
2. ## Science

What is an example of a liquid and a gas solution

asked by becca on January 8, 2008
3. ## chemistry

determine the pH of this solution. [OH-]=4.25 * 10^-5 M. Is the answer 4.37??

asked by Miley on May 15, 2008
4. ## Math

How many hours are there in 90 months? (With Solution)

asked by Diana on September 8, 2017
5. ## Science

What is an example of a solid and a liquid solution

asked by Edward on January 8, 2008
6. ## Mathe

If x=-1,y=2 Is A Solution Of Epuation 2x+5y=a, Find The Value Of a.

asked by Sachin on January 21, 2017
7. ## calculus

if y1=x^(2)+3x-1 and y2= x-5 find: a. y1+y2 b. y1-y2 c. y1*y2 solution pls..

asked by gen on November 12, 2010
8. ## Math

If kx + y + z = 1 x + ky + z = k x + y + kz = k^2 has unique solution then k is not equal to 1 and W. What is W?

asked by Anonymous on August 24, 2012
9. ## chemistry

What is the pH of an aqueous solution at 25°C in which [H+] is 0.025 M?

asked by richy on November 20, 2010

Choose the correct solution for: 7(p-2)=16 A)-1 1/14 B)1 1/14 C)-1/14 D)1/14

asked by Kenya on June 1, 2008
11. ## chemistry

How many moles of permanganate are in 5.93 L of a 3.81 M solution?

asked by Mcculum on October 3, 2017
12. ## College Chemistry

Calculate both [H30] and [OH-] for a solution that is: pH=5.50 ph=7.00

asked by Gayla on April 26, 2009
13. ## algebra

determine if (-3/10,-2 is a solution to 10x,-9 =15

asked by vickie on February 11, 2011
14. ## Science

Why is the KI solution added in excess

asked by Kabeer on April 24, 2017
15. ## college

What is the molarity of a 1.4% HCOOH solution

asked by Calli on November 16, 2010
16. ## Science

What is an example of a solid and a gas solution

asked by Julie on January 8, 2008
17. ## Math

Find the solution set of x^2+x+3>0

asked by JR 8 on October 24, 2016
18. ## algebra

4x+12>4 and 3x-25>-13 Solution {xIx> ? } I get so lost on these.

asked by Blake on January 20, 2010
19. ## Math

Find the solution of the given equations. x-1/x^2-9+1/x-3=2/x+3 Thank you! :)

asked by Gennelle on July 24, 2016
20. ## science

What is the pH of a 0.05 M solution of potassium hydroxide??

asked by sege on May 6, 2017
21. ## Algebra help pls

Which of the following is a solution to the equation y=3x-1? A (4,1) B (2,5)* C (4,3) D (0,-3) Am I correct?

asked by Blaw on September 6, 2017
22. ## algebra

asked by Daniel on May 29, 2010
23. ## calculus

if f(x)=3^(x)-3^(-x), find : f(2), f(-1) solution pls..

asked by gen on November 12, 2010
24. ## calculus

if f(x)=4^(2x)-1, find :f(1)+f(2) solution pls

asked by gen on November 12, 2010
25. ## chemistry

give the [OH] of a vinegar solution that has a pH of 3.2. i got 6.3 *10^4. is that right?

asked by Miley on May 15, 2008
26. ## Chem/science

what is the ph of 2.62 x 10 ^-2 M HBr solution? I get 5.94 is that right? thanks andy

asked by Andy on May 23, 2010
27. ## chemistry

What are the values of [H3O+] and [OH−] for a solution with pH = 3.86?

asked by Bella on November 22, 2013
28. ## Number Theory

Find the solution to 4X + 7 =2 (mod15)

asked by Phyllis on January 4, 2017
29. ## math

which of the followin has a solution set of {-5,2} A)X^2+3X-10=0 B)X^2-3X=10 C)X^2+3X=-10 D)X^2-3X+10

asked by anonymous on April 27, 2009
30. ## Science

Calculate the POH of a solution when H+ and PH is given

asked by Beauty on March 4, 2018
31. ## math

8q+6-2p=0 39=p-q what is the solution or ordered pair

asked by maria on November 16, 2010

Which of the linear systems has exactly one solution A: -x+y=9 x-y=9 B: -x+y=9 x-y= -9 C: -x+y=9 -x-y=9 D: x-y= -9 -x+y= -9

asked by anonymous on December 5, 2012
33. ## chem class

What is the pH of an aqueous solution at 25°C in which [OH-] is 0.025 M?

asked by jessie on November 20, 2010
34. ## math problem

is the given nubers solution of the inequality? 2, -14, 12, -1 y-8>2y-4

asked by Lavern on January 15, 2012
35. ## math

The solution of x for equation a (bx - c) = d - (x + e) (a > 0 and b > 0) the answer is x = ac + d - e/ab + 1 How?

asked by jose on July 22, 2016
36. ## chemistry

A solution with a pH of 7 has a [OH1-] of? 1 x 10-7 M?? Is that correct

asked by ANON on December 3, 2014
37. ## ALGERBRA

CAN YOU PLEASE TELL ME THE SOLUTION FOR THE FOLLOWING 5X>-4 BUT THE SIGN HAS A LINE UNDER IT I REALLY NEED HELP

asked by elaine on March 29, 2011

Which of the linear systems has exactly one solution A: -x+y=9 x-y=9 B: -x+y=9 x-y= -9 C: -x+y=9 -x-y=9 D: x-y= -9 -x+y= -9

asked by anonymous on December 5, 2012
39. ## math

Solution of the equation 4/x-5/y=x+y/xy+3/10 and 3xy=10(y-x)

asked by zaib ali on November 12, 2015
40. ## algebra

I do not understand how the solution to(3/2)x +2=15+x is x=34. Can anyone explain?

asked by anonymous on May 28, 2010
41. ## Math

Which ordered pair is NOT a solution of -4x-9 ? A) (-9, 27) B) (3, -21) C) (-6, 4) D) (5, -28) I think D

asked by Jamie M on April 12, 2018
42. ## chem

Define aqueous solution.

asked by stac on October 11, 2012
43. ## Chmeistry

How can solubility of a solution be written?

asked by Linda on April 1, 2015
44. ## Chemistry

What is the pH of a 0.0344 M KOH solution?

asked by Cassie on April 3, 2011
45. ## Chem

What is the [H3O+] of an aqueous solution having a pH of 11?

asked by Stacy on October 11, 2012
46. ## algebra

I need an example how to graph for an inequality solution. eq. 5

asked by rick on January 24, 2016
47. ## Chemistry

what is the OH- concentration of 0.08 M solution of CH3COONa

asked by Rahul on May 4, 2017

-2(3r+4)= -5r-8-r Answer I got r=r Question 2 14+8w=4(8+2w) I have 14=48. No solution

asked by Kent on January 19, 2015
49. ## Algebra

Which is the extraneous solution of -x=sq root of 2x+15? A. -5 B. -3 C. 3 D. 5 I think it is D...?

asked by Cassie on March 15, 2013
50. ## chemistry

what is the ph of a 2.0M solution of a strong acid?

asked by emmanuel on April 3, 2011
51. ## chemistry

does a solution have to involve a liquid?

asked by nanan on May 21, 2010

Which of these equations have an equilibrium solution. What are they? How are their DE's different? dy/dx=6y-y^2 dy/dx 15-3y

asked by Francine on December 3, 2014
53. ## Science

What is an example of a gas and solid solution

asked by Bob on January 8, 2008
54. ## Differential Equation

What is the solution of the differential equation of (6x+1)y^2 dy/dx + 3x^2 +2y^3=0?

asked by Aubrey on September 9, 2017

Which of the linear systems has exactly one solution A: -x+y=9 x-y=9 B: -x+y=9 x-y= -9 C: -x+y=9 -x-y=9 D: x-y= -9 -x+y= -9

asked by anonymous on December 5, 2012
56. ## SCIENCE

IF VAPOUR PRESSURE OF SOLUTION IS 7 THEN WHAT WOULD BE ITS ph?

asked by TABISH on February 7, 2011
57. ## chemistry

If the pH of an aqueous solution is 5, what is the OH− concentration?

asked by susan on June 8, 2014
58. ## General Chem

given the pH (7.15)of a solution at 25deg C what is the H3O+ and OH-

asked by Jv on October 13, 2012

Which of the linear systems has exactly one solution A: -x+y=9 x-y=9 B: -x+y=9 x-y= -9 C: -x+y=9 -x-y=9 D: x-y= -9 -x+y= -9

asked by anonymous on December 5, 2012
60. ## Algebra

Graph the solution of the inequality. x

asked by Brandi on November 3, 2015
61. ## mathematics

If ?2 is the solution of the equation 2x+1? 3c=2c+3x?7 find the value of c

asked by sunkanmi on April 3, 2014
62. ## math

find the solution set 2x+(3x-(4x-5))=x/4-2 a.28/3 b.-28/3 c.9 d-9

asked by chevlios on January 22, 2015
63. ## math

if x,y are integral solution of 2x^2-3xy-2y^2=7 then value of |x+y| is:

asked by kabhir on June 10, 2014
64. ## Math

Find b such that (8x+1/b)-2=x has a solution set given by {3}. b =

asked by Abby on October 4, 2011

Which of the linear systems has exactly one solution A: -x+y=9 x-y=9 B: -x+y=9 x-y= -9 C: -x+y=9 -x-y=9 D: x-y= -9 -x+y= -9

asked by anonymous on December 5, 2012
66. ## organic chemistry

calculate the pH of a 1.25 x 10^-3 M HNO3 solution

asked by kathy on May 2, 2011

Which number is a solution of the inequality? g>6.4 a. 7 b. 6 c. 6.4 d. -7 Which number is a solution of the inequality? g+3>6 a. 3 b. 4 c. -3 d. -4 Which number is a solution of the inequality? 12

asked by Ashley mccgarvey on January 9, 2014
68. ## Math

Which number is a solution of the inequality? 12

asked by Kaai97 on November 10, 2015

Which of the linear systems has exactly one solution A: -x+y=9 x-y=9 B: -x+y=9 x-y= -9 C: -x+y=9 -x-y=9 D: x-y= -9 -x+y= -9

asked by anonymous on December 5, 2012
70. ## Chemistry

What is the pH of a 0.20 M HF solution that is 5.8% ionized at 25 Celsius ? A.4.45 b.0.70 C.1.93 D.1.23 E.1.40

asked by Chem on March 19, 2013
71. ## Algebra

find the postitive solution for c: c^2=o.6^2+0.8^2

asked by Bobby on September 29, 2007
72. ## math

Find b such that (8x+1/b)-2=x has a solution set given by {3}. b =

asked by Lesley on October 4, 2011
73. ## math

3x + 5y = 11 are (9,-3) a solution. the answer I got was no can someone please help me if that is incorrect.

asked by janay1978 on June 8, 2009
74. ## Differential Equation

Find the general solution of y"+4y'-2y=0

asked by Maegan on July 14, 2012
75. ## Math

Which ordered pair is for the solution. y=3x-5 y=1/2x (6,3),(1,-2),(2,1),(-2,1)

asked by Hannah on December 13, 2017
76. ## Precalculus

Calculate solution set. x^2+4y^2=68 xy=8

asked by Anonymous on May 24, 2014
77. ## math

Find the solution set 2x + [3x-(4x-5) ]=x/4-2 a.28/3 b.-28/3 c.9 d.-9

asked by chevlios on February 13, 2015
78. ## math

For which m is the solution of the following sistem 0

asked by s on February 20, 2008
79. ## chemistry

what is the osmolarity of a .20 M solution of Na3PO4?

asked by Dana on October 19, 2010
80. ## trig

verifying a solution. 4cos^2 2x-2=0

asked by tomas on May 31, 2011
81. ## Chemistry

How does a pH of a buffer solution go outside of its range?

asked by Avery on April 28, 2015
82. ## chemistry

what is the perpose of the phenolphthalein solution?

asked by Ana on June 23, 2010
83. ## English

I need a plausible solution to genocide.

asked by Jessica on January 17, 2011
84. ## math

determine whether 9 is the solution of the equation 7(x-2)=50

asked by Norma on July 23, 2010
85. ## math

Find p such that px^2-12x+4=0 has only one solution. Thank you!!!

asked by Jane on April 14, 2016
86. ## Math

Can you please give me an example of a solution step? Thanks.

asked by Emma on September 16, 2012
87. ## math 1321

what is the digit in the ones place of the solution to 3^63

asked by delia :) on September 16, 2012
88. ## algebra

2x+1/x+1 (is less than or equal to) 2 what is the solution of the inequality?

asked by nyet on January 3, 2010
89. ## math

What is the solution to the inequality |2n+5|>1? A. –3 > n > –2 B. 2 < n < 3 C. n < –3 or n > –2 D. n < 2 or n > 3 I put A! :) Thank you again.

asked by :) on May 29, 2015
90. ## chemistry

What is the pH of a solution that is 0.20 M CH3COOH and 0.10 M CH3COONa?

asked by curtis on May 4, 2010
91. ## math

Which ordered pair is not a solution of y = 4x -9 (-9, 27) (3, -21) (-6, 15)I think this one? (5, -28)

asked by really on April 7, 2016
92. ## Math

x < 1 is a solution to which of the following inequalities? A. x + 2 < 3 B. x − 2 < − 3 C. x − 2

asked by Jon on April 24, 2012
93. ## Math 117

Consider the equations: f(x) =-6x-1 and g(x)=4x^2 Select the solution for (fg)(x)

asked by Caity on March 16, 2014
94. ## CHEMMM

Calculate the ph of a 0.20 M solution of NH2BR

asked by MMmm on February 23, 2009
95. ## Chemistry

Is 20.0 mL of 3.0 M HF a buffer solution with an approximate pH of 3?

asked by Dan on May 4, 2010
96. ## Chemistry

The pH of a 1.0 x 10^-3 M Ba(OH)2 solution at 25 degrees C is how can 11.3 be the right answer.

asked by LT on April 2, 2008
97. ## Math

Which ordered pair is for the solution. y=3x-5 y=1/2x (6,3),(1,-2),(2,1),(-2,1)

asked by Hannah on December 13, 2017
98. ## Math a

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

asked by katie on September 22, 2011
99. ## CHEMISTRYYY!!!

Calculate the ph of a 0.20 solution of KCN

asked by MMmm on February 23, 2009
100. ## chemistry

what does 1M solution of sugar stands for?

asked by edward on June 7, 2013