# 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 387
1. ## Algebre II

Help, Im stuck.... I cannot remember what to do. (x+6)(x-7)(x+4)>0 The solution set is....{x, } Thank you:)

asked by Nancy on March 7, 2011

I need to know a quadratic equation that have: 1) exactly one negative solution

asked by Joy on April 1, 2009
3. ## Algebra II

Help, Im stuck.... I cannot remember what to do. (x+6)(x-7)(x+4)>0 The solution set is....{x, } Thank you:)

asked by Nancy on March 7, 2011
4. ## Alegebra 1

Determine whether (2,11) is a solution to y=17x-13. Thank you before hand, for your help.

asked by esther on December 19, 2010
5. ## CHEMISTRY

What is the pH of a solution with [H3O+] = 1 x 10-9 M? My answer is pH=9. is that correct

asked by KKK on December 1, 2014
6. ## Chemistry

What is the ionic strength of 0.2 M Na2HPO4 in a solution?

asked by Raj on December 21, 2015
7. ## trig

What's the general solution for 3sin^2x+sinxcosx=2

asked by Piwokazi on September 10, 2011
8. ## Science

0.02mole of the HCL and in 2leter of the pH solution

asked by Anonymous on August 20, 2018
9. ## Math

Which ordered pair is a solution of the equation: y= -9x + 4 A (10,-86) B (-4,-58) C (6,-41) D (-6, 57)

10. ## algebra 2

which point is a solution to the following systems of inequalites -4x+ 5y> 20 8x + 3y < 24

asked by gege on May 11, 2013
11. ## Math Problem

Is this ordered pair a solution of the inequality? (9,17);8x-9x>2

asked by Lavern on January 15, 2012
12. ## Chemistry

A solution in which [H+] is 1000 times greater than [OH-] [OH-] = ?M

asked by Matt D on February 26, 2012
13. ## chemistry

The temperature at which crystal will first appear when a solution is cooled from 60°c to 20°c?

asked by Anonymous on September 26, 2015
14. ## Chemistry

What is the molarity of 350 mL of solution that contains 27 g of CaCl2?

asked by Becky on November 5, 2010
15. ## Chemistry

What is the pH of a 2.5 x 10-2 M HCl solution? I'm so confused how to find this :(

asked by Jess on April 24, 2012
16. ## algebra

which ordered pair is a solution of the equation y=5x (-2,10) (-5,25)** (-3,15) (-2,10) which ordered pair is a solution of the equation y=-9x+4 (10,-86) (-4,-58) (6,-41)** (-6,57)

asked by oto on September 21, 2016
17. ## Algebra

How do you find a quadratic equation if you are only given the solution?

asked by Anonymous on June 2, 2010
18. ## Chem

How many grams of salt are there in 2.9 mL of solution that has a concentration of 1.4 g/mL?

asked by csd on September 14, 2016
19. ## Math

Write a divison equation that has a solution of -20

asked by Em on November 4, 2016
20. ## chemistry

calculate the molarity of 18.0 ml of h2so4 in 2.0l of solution?

asked by diane on December 5, 2010
21. ## chemistry

Calculate the pH of a 0.0019 M HNO3 solution. 2.7

asked by krystal on February 29, 2012
22. ## chemistry help

calculate the PH of a buffered solution of HF and F (Pka of HF is 3.2)

asked by Anonymous on May 16, 2015
23. ## chemistry

Determine the [OH^-] of a solution that is 0.145 M in CO3^2-.

asked by nurul on December 21, 2016
24. ## biology

How can i get air in a bag, into a beaker of solution?

asked by rose on November 5, 2015
25. ## math

Find the solution x of the following equation : 12X =32.

asked by gary on February 26, 2013
26. ## Math

Find the solution set of the equation {x^2+y^2=34 {x+y=2

asked by Alexander on July 16, 2013
27. ## chemistry

What is the pH of a 0.250 M NH4Cl solution? Kb for NH3 = 1.8 × 10−5. Thank you.

asked by fenerbahce on August 21, 2012
28. ## Redox chemistry

what is the PE for a neutral solution saturated with oxygen????

asked by Kaushik on February 26, 2010
29. ## chemistry

how to make 750ml of 1.5 m solution of naoh

asked by Anonymous on March 4, 2010
30. ## Chemistry

What is the solubility of ZnCO3 at 25 o C in a buffer solution with a pH of 9.74?

asked by Snow on April 28, 2016
31. ## Ordered Pairs ASAP

3. Which ordered pair is a solution of the equation y=x-3 **(5,2) 4. Which ordered pair is a solution of the equation y=5x **(-2,10) 5 Which ordered pair is a solution of the equation y=-7x+2 **(1,-7)

asked by Mate on October 3, 2017
32. ## math

is secA*cosA =1 for all A where 0

asked by mkc on July 29, 2016
33. ## Chemistry

What must be the pH of a solution that is 0.049 M Fe3+ to just cause Fe(OH)3(s) to precipitate?

asked by Chemistry Confused on April 19, 2010
34. ## CHEMISTRY

What is the [H+] in a 0.10 M solution of ascorbic acid,C6H8O6?

asked by James on April 25, 2012
35. ## chemistry

What are the concentrations of H3O+ and OH- and what is the pH of a 0.15 M solution of Na2CO3 (at 25 °C).

asked by darren on March 15, 2011
36. ## chemistry

how many moles of Kl are present in 500 ml of a 0.2 M solution?

asked by Amber on November 25, 2014
37. ## chem

what happens when a seed crystal is placed into a saturated solution?

asked by jill on April 3, 2010
38. ## Chemistry

How many mL of HCl solution are required to change pH from 2.67 to 9.25?

asked by Rhonda on March 24, 2015
39. ## MATH

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

asked by Jessica on November 25, 2010
40. ## eng1511

the sure solution to unemployment is a better quality of education?

asked by ntosh on March 31, 2013
41. ## chemistry

find the concentration of HCL if the pH of the solution is 0.50

asked by Jessica on March 17, 2011
42. ## math problem

haveing problem solving 8x -(6x+7)= -3 The solution is x =

asked by DJ on January 21, 2012
43. ## trigonometry

Determine the general solution of 8cos^2x-1=0

asked by OwamIIi on October 3, 2013
44. ## Math

Find the solution set of the equation {x^2+y^2=34 {x+y=2

asked by Alexander on July 16, 2013

Determine which ordered pair is a solution of y = 2x - 3 A. (-2, 7) B. (0, 3) C. (-4, -11) D. (5, -7)*** Please help!

asked by MINION on June 6, 2017
46. ## math

Find p(p^-1(x)) when p(x)=x^2-4 I tried solving this and I got x^4-x+20 but that has no solution so I'm a little confused.

asked by maath on September 15, 2018
47. ## Chemistry

Assuming complete dissociation, what is the pH of a 3.73 mg/L Ba(OH)2 solution?

asked by Shardai on November 11, 2013
48. ## math

Given that x = 2log t is a solution of the equation10^(2x+1) -7(10^x) -26 =0. Find t

asked by lindsay on July 10, 2014
49. ## Math

Find the solution set of the equation {x^2+y^2=34 {x+y=2

asked by Alexander on July 16, 2013
50. ## Math

The solution set of the equation (absolute value 2-4x )=12 is

asked by Anonymous on January 23, 2011
51. ## bluehills high school

general solution 1-cos2x/4cos(90)

asked by lebo on November 6, 2015
52. ## eng1511

The sure solution of unemployment is a better quality of education

asked by amanda on March 11, 2013
53. ## Vector & Geometry

if A= i+j, B= 2i-3j+k and C= 4j-3k find: Ax(BxC) pls help with solution.

asked by Mathwise on November 4, 2009
54. ## chemistry

difference between solution and pure substance

asked by Anonymous on February 21, 2013
55. ## algebra

Which ordered pair is a solution of y = x – 4? a. (−1, −5) b. (0, −3) c. (2, 6) d. (3, 1) my answer C (2, 6)

asked by J J on November 28, 2016
56. ## math

determine which ordered pair is not a solution of y = -5x -4 (10, -52) (7,-39) (-7, 31) (8,-44)

asked by maria on December 20, 2016
57. ## Chemistry

Calculate the [h30+] in a 0.010M solution of Sr(OH)2

asked by Saphire on April 25, 2012
58. ## chemistry

How much ethanol is required to make a 2L of a 70%ww solution?

asked by Larry on July 28, 2012
59. ## chemistry

how can i know whether solution is acidic or not and then what type of acid?

asked by khin on May 8, 2011
60. ## Mat 116 Final

x+3y=6 I did it like x + 3y = 6 ____________ x*(-1) +3*(2) ?6 -1 6 -6 Also, (-1,2) intercepts (3,6) Am I correct. If so. then solution for x = -1

asked by Loren on April 11, 2010
61. ## Math

solution to (4 x 10^3) x (6 x 10^6) written in scientific notation 24 x 10^9 2.4 x 10^9 THIS ONE 24 x 10^18 2.4 x 10 ^10

asked by Someone on October 6, 2018
62. ## Chemistry

What happens if you add more solute to a saturated solution?

asked by Timofey on May 22, 2013
63. ## chem 121

what is the volume of a 0.750Mmgcl2 solution containing 45.0g of mgcl2

asked by ngugi on July 2, 2010
64. ## algebra

im really stuck on this one What is the solution to the linear inequality y ¡Ý 4x - 5 ?

asked by Meredith Grey on March 25, 2015
65. ## algebra

How do you find a quadratic equation if you are only given the solution?

asked by Jack on April 29, 2008
66. ## science

Why do you have to filter the Ca(OH)2 solution before loading it into the burette?

asked by ghasan younis on April 23, 2013
67. ## Math for Liberal Arts Major

Find the solution set for the following inequality: x+1>1/2x-11

asked by Mary on February 27, 2012
68. ## chemistry

If 16.0 mL of 8.5 ✕ 10-2 M HClO4 is added to 22.0 mL of 7.6 ✕ 10-4 M KOH, what is the pH of the solution?

asked by Elizabeth on February 23, 2014
69. ## Math

Is ordered pair a solution to the equation? y = -5;(-3,1)

asked by KGK on November 22, 2013
70. ## ap chemistry

What is the [H3O+] of a solution with [OH-] = 6.3 × 10-4 M? A. 6.3 × 10-18 M B. 10.80 M C. 6.3 × 10-4 M D. 1.6 × 10-11 M DrBob222 can you help me with this question please?

asked by jessica on September 14, 2016
71. ## math

px+qy=r 2px-qy=2r find the solution. There are five unknowns here: p, q, r, x, y

asked by Ashley on January 18, 2007
72. ## Chemistry

Which THE PH VALUE OF A solution 0,01 mol/l a monoacido that presents ka= 1×10-6

asked by Angelica on January 19, 2016
73. ## math

Write the general solution to y = arcsin 0.

asked by bella on April 16, 2019
74. ## Chemistry

How would you make .25 Liters of a .1 M MgCl2 solution?

asked by Mayson on October 11, 2016
75. ## Precalculus

Is this correct? 1. Find the solution set for x^2/(x+3) < 9/(x+3). x^2/(x+3) < 9/(x+3) x^2 < 9 x^2 - 9 < 0 (x-3)(x+3)

asked by Anon on January 10, 2012
76. ## Math

Find the solution set of the equation {x^2+y^2=34 {x+y=2

asked by Alexander on July 16, 2013
77. ## MATH

How do you go about finding equations to a given solution set?

asked by Fiona on May 10, 2011
78. ## maths-Linear inequations

Find the solution (feasible) of following inequations x+ 4y ≤ 24; 3x +y ≤21 ; x+ y ≤9; x≥0 and y≥0

asked by anoynomous on March 22, 2013
79. ## Chemistry

How to make a 55ml of a 3% solution of NaCl?

asked by Kristy on January 5, 2009
80. ## Science

what tells you whether a solution is basic or acidic?

asked by Lucy on June 13, 2010
81. ## chem

0.283 M solution X 176.12 g = 50 g/L how many g per 30 mL? 150?

asked by Anonymous on April 30, 2016
82. ## Chemistry

How would you analyze a solution known to contain Hg22+ and Cu2+?

asked by Kelly on March 11, 2012
83. ## Pre Calculus

Determine an approximate solution to the inequality 2^x=x^2.

asked by Hanu on May 3, 2014
84. ## math

decide if the given number is a solution to the given equation. x/4 = 5;20

asked by Diana on September 4, 2009
85. ## Chemistry

Calculate the pH of a 0.10 M solution of barium hydroxide, Ba(OH)2.

asked by Saira on March 2, 2010
86. ## math

Find the solution(s) of the logarithmic equation ln(x+4)+ln(x−4)=0

asked by avia on February 21, 2016
87. ## algebra

explain how to check a solution of an equation.

asked by Cindy on January 31, 2011
88. ## chemistry

what is the pH of an .200 M aqueous solution of NaOH?

asked by Anna on November 30, 2010
89. ## math

What is the solution to (4 x 10^3) x (6 x 10^6), written in scientific notation?

asked by Mep on October 31, 2017
90. ## college chem

PLEASE..Determine [OH-]of a solution that is 0.270 M in HCO3-...thanks

asked by susy on April 9, 2010
91. ## Algebra

what is the solution to (4 x 10^3) x (6 x 10^6), written in scientific notation? A. 24 x 10^9 B. 2.4 x 10^9 ** C. 24 x 10^18 D. 2.4 x 10^10 Is this right?

92. ## chemistry

How many grams of NaOH are there in 2.5L of a 0.343M solution?

asked by n/a on March 12, 2011
93. ## Chemistry

Prepare 250 cc n/10 KMno4 solution

94. ## Vectors

If ∣x∣=8, ∣y∣=13 and ∣x+y∣=15, determine ∣x-y∣. You may want to draw a diagram to help with your solution.

asked by Jacob on October 3, 2018
95. ## Science

13.5g aluminium changes to Al^3+ in solution by loosing ..... electrons.

asked by Chemistry question on January 4, 2016
96. ## Math

Tell Whethter the givin number is a solution of -5 < n. 3. 8 4. -8 5. -4 6. 4

asked by Dejon on January 10, 2009
97. ## Chemistry!!

How many moles of Mg are there in 4.00 L of a 0.500 M solution of MgCl2?

asked by margrav2 on December 16, 2010
98. ## Chemistry

Calculate the ZnCO3 in a buffer solution with a pH of 9.83

asked by Katy on April 25, 2017
99. ## Chemistry

Why is the carbonate solution boiled before titrating?

asked by Candice on January 18, 2015
100. ## algebra

Find the solution to 36z^2+96z+15=0

asked by michelle on February 29, 2012