# Please observe the solution for the following two problems : (a) 2x + 18 = x + 25 (b) 3x + 5 = 7x - 15 (a) 2x + 18 = x + 25 2x - x = 25 -

30,299 questions, page 129
1. ## chemistry

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

asked by diane on December 5, 2010
2. ## 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?

3. ## Algebra 1A

solve for the indicated letter b=a+d for a= the solution is a= b. is this correct? thanks

asked by Lea on September 26, 2009
4. ## algebra 1

Use mental math to determine the solution x/3=24. a. x=6 b. x=8 c. x=27 d. x=72 b is it?

asked by oto on September 6, 2016
5. ## Physics

Is KNO3 soluble in KOH solution?

asked by Nisha on September 5, 2016
6. ## Chemistry

Calculate the ph of a solution that is 0.157m HCI?

asked by James on May 4, 2016
7. ## algbera

which ordered pair is a solution of the equation ? 3x+y=0 A.(-1,3) B.(3,-2)c.(-2,3) D.(3,-1)

asked by lauren on December 9, 2009
8. ## Chemistry

If 38.5 mL of 8.9 ✕ 10-3 M HBr is added to 27.0 mL of 4.6 ✕ 10-3 M LiOH, what is the pH of the solution?

asked by . on March 10, 2019
9. ## 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
10. ## math

find the value of k such that the equation e^(2x)=krootx has exactly one solution.

asked by tom on April 4, 2013
11. ## algebra

-3x-4y =20 x-10y= 16 If x,y is the solution to the system of equations above what is the value of x? A. -14 B. -12 C. -4 D. 16

asked by Anonymous on October 6, 2018
12. ## algebra

solve using the addition principle x + 3/13 = 7/13 what is the solution for x

asked by thawk on November 8, 2010
13. ## Chemistry

what is the PH of a solution of .1 M NAN3 that disassociates into HN3

asked by Molly on March 4, 2015
14. ## chem

How to find the %(W/V) of 134mL of a 0.610 M solution of Mg(OH)2

asked by chem on February 16, 2012
15. ## Math

Identify the solution(s) of the system of equations, if any. x + 5y = 7 4x - 5y = 13

asked by Cathy on January 23, 2015
16. ## math

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

asked by Diana on September 4, 2009
17. ## 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
18. ## 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
19. ## math

find the solution of the following system of equations x-y=0 x+y=4

20. ## algebra

determine if (-5/6, -1) is a solution to 6x-5y= -10 show work

asked by nicole on November 1, 2011
21. ## math

What is the value of t in the solution to this systems of linear equations? 2s – 3t = –1 3s – 4t = 0 a)–5 b)3 c)-7/3 d)4

asked by joe on April 3, 2013
22. ## chemistry

how many grams of drug are in 75mL of a 4% solution/

asked by Anonymous on January 15, 2011
23. ## Chemistry

Calculate the pOH of a 0.410 M Ba(OH) solution.

asked by Anonymous on March 4, 2015
24. ## Vectors

Can you please explain how to answer this? What is a solution for the following system? x-4y+z=2 and -x+4y-2z=8 a) x=4s+12, y=s, z=-10 b) x=s+4, y=3s, z=-4 c) x=2s+5, y=s, z=-12 d) x=s, y=4s, z=-12

asked by Sara on March 17, 2015
25. ## Chemistry

how can you prepare 300ml of 15% h2so4 solution

asked by rone on February 18, 2013
26. ## math

How would you use the substitution method to answer 1/3x-2=1 x-6y=3, and what would be the solution?

asked by Penny on November 2, 2011
27. ## Math

solve for the indicated letter. z=11-y, for y the solution is y= No idea

asked by scooby9132002 on May 18, 2009
28. ## 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
29. ## Algebra 1

Find the solution to the system y=x^2-2x-2 My answer is (-1,1)(7,33)

asked by Steve on March 30, 2015
30. ## 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
31. ## math

determine which ordered pair is a solution of y -5x + 10. A.(-15,5) B.(2,0) C.(-1,-5) D.(3,25) I think it is A, can someone help?

asked by meow meow kit kat on March 10, 2019
32. ## 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
33. ## algebra

would 5 trees be a solution to the inequalit inpart b

asked by janet on October 30, 2009
34. ## Algebra

x^2-25 over x^2+7x, divided by x^2+7x+10 over x^2+9x+14. I found the solution to be x-5 over x, is this correct?

asked by Anonymous on September 23, 2009
35. ## AP Biology

Why should we test water with Benedict's solution?

asked by Coral on November 3, 2007
36. ## chemistry

Determine the Ka of an acid whose 0.294 M solution has a pH of 2.80.

asked by rena on January 16, 2011
37. ## math

is secA*cosA =1 for all A where 0

asked by mkc on July 29, 2016
38. ## algebra

Solve. 9x^2 + 12x = 32 x2 + (4/3)x - (32/9) = 0 has two solutions: x = -2/3 + √ 4 or x = -2/3 - √ 4 This is the solution I came up with. Is this right?? Please and Thank you.

asked by slomo on February 3, 2015
39. ## Precalculus

Solve the inequality and sketch the solution: -3≤ 2(x+4)< 14

asked by Trevor on January 3, 2010
40. ## Science

could a solution of a liquid and a gas be soda

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

You have a 0.0825 M solution of HCl. You expect the pH to be

asked by Anonymous on December 5, 2011
42. ## Math

Which ordered pair is a solution of the equation y = 3x? A. (–2, –9) B. (–8, –18) C. (–8, –3) D. (–10, –30)

asked by Martin1162 on May 3, 2016
43. ## calc

Find m and b so that y=mx+b is a solution to the differential equation dy/dx=1/2x+y-1

asked by Mischa on January 24, 2008
44. ## 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
45. ## chemistry

Calculate the pH of a 0.0019 M HNO3 solution.

asked by krystal on February 29, 2012
46. ## Chemistry

What is the H+ concentration for an aqueous solution with pOH = 4.13 at 25 ?

asked by Pete on November 22, 2010
47. ## 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
48. ## chemistry

Calculate the pH of a 0.0019 M HNO3 solution. 2.7

asked by krystal on February 29, 2012
49. ## algebra

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

asked by michelle on February 29, 2012
50. ## chemistry

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

asked by Amber on November 25, 2014
51. ## algebra

Solve by completing the square x^2+3/2x=3 What is the solution? x=

asked by Becky on March 11, 2008
52. ## chemistry

what is the [H3O+] of a solution that is .01 M in HOCl and .03 M in NaOCl?

asked by Audrey on November 13, 2010
53. ## chemistry

What is the solubility of M(OH)2 in a 0.202 M solution of M(NO3)2?

asked by Anonymous on April 4, 2009
54. ## chemistry

how would you prepare 300 ml of a 10% CaCl2 solution (w/w)?

asked by erin on November 29, 2011
55. ## biotech

how would you prepare 300 ml of a 10% CaCl2 solution (w/w)?

asked by erin on November 29, 2011
56. ## English

The sure solution to unemployement is a better quality of education

asked by Valencia on April 2, 2013
57. ## Algebra 1

Which ordered pair is a solution of the inequality? y>= 4x-5 3,4 2,1 3,0 1,1

asked by Steve on December 21, 2014
58. ## Pre-calculus ( Absolute value)

Why does |7 + 3x| = x -1 have no solution? I could plug in, for example 5, and the answer would be positive. Thank you =)

asked by Lucina on May 10, 2015
59. ## Chemistry

What is the hydrogen ion concentration of a solution whose pH Is 4.10

asked by Abasiekeme udoh on March 4, 2019
60. ## algebra

Determine whether (-4,5) is a solution of 4x + 8y =1 I would like the steps so I can practice this.

asked by Help on September 10, 2009
61. ## Chemistry

What is the hydrogen ion concentration of a solution with pH of 3.4?

asked by Mmeso on September 13, 2018
62. ## 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
63. ## Differential Equations

y'=2x+y. Find a solution whose graph is also an isocline.

asked by Brian on February 14, 2013
64. ## Math

hey i need help with this y = −1 3 x + 2 y = x + 2 What is the solution to the system of equations? A) (0, 2) B) (2, 0) C) (-1, 3) D) (0, -2)

asked by Abgail on March 22, 2019
65. ## Math

determine which ordered pair is a solution of y -5x 10

asked by meow meow kit kat on March 6, 2019
66. ## chemistry

The pH of an HCl solution is found to be 1.74. Therefore the [H3O+] is:

asked by Anonymous on December 5, 2011
67. ## math

solve 5/8x + 1/16x=7/16+= the solution is x=___

asked by question on July 22, 2009
68. ## chem class

What is the pH of an aqueous solution at 25° that contains 3.98 × 10-9 M hydronium ion?

asked by jessie on November 20, 2010
69. ## general chemistry

Calculate the molarity of each of the following solutions.70.8 in 2.51 of solution

asked by kelia on March 7, 2013

which graph response the solution to the given system? y=-x+5 y=1/4x+10

asked by roeeeee on January 23, 2019
71. ## maths

Let S(t) be a solution to the differential equation t dS dt − S = 3 with the initial value S(1) = 1. Which of the following is the value of S(2)? A. 0 B. 2 C. π D. 5 E. −5

asked by Anonymous on October 25, 2018
72. ## Math

tell whether each ordered pair is a solution of the eguation 3x + y = -11, (-4,1) 2x -y = 4, (3, -2)

asked by Anonymous on April 28, 2019
73. ## Math

which graph represents the solution to the given system y =-x+4 y = 1/3x + 8 Please help me..

asked by Luna on January 18, 2019
74. ## math

What is the value of t in the solution to this systems of linear equations? 2s – 3t = –1 3s – 4t = 0 a)–5 b)3 c)-7/3 d)4

asked by tom on April 2, 2013
75. ## Chemistry

What is the pH of a saturated zinc hydroxide solution?

asked by Julian on March 18, 2013
76. ## Chemistry

If you had 6 moles in a 600ml of solution, what would be the molarity?

asked by Jessi on April 21, 2009
77. ## honors algebra 1

3. Which ordered pair is a solution of the equation y=x-4? a. (2,6) b. (6,2) c. (-2,6) d. (3,1) 4. Which ordered pair is a solution of the equation y=5x? a. (-2,10) b. (-5, 25) c. (-3,15) d. (-2, -10) 5. Which ordered pair is a solution of the equation

asked by Chloe on September 22, 2016
78. ## Math

I need help with this math question What is the solution to - 55 + q = 7? A - q = - 62 B - q = - 42 C - q =42 D - q = 62 My answer is A

asked by weqwe on September 20, 2018
79. ## chemistry

What volume (mL) of a 3.23 %w/v saline solution contains 69.1 mg of NaCl?

asked by alex on March 3, 2013
80. ## Chemistry 1301

How many g of NaOH are in 10 ml 0.1 M solution? How do you find this out, what are the steps?

81. ## Differential Equations

Hello, I am needing help to find the general solution to: dy/dt + y = te' Thanks!

asked by Thomas on January 27, 2019
82. ## math

determine which ordered pair is a solution of y=2x-3.

asked by anna on May 5, 2016
83. ## calculus

if f(x)=Inx, find: f(2)+f(3) solution pls

asked by gen on November 12, 2010
84. ## Math Problem

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

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

Write the general solution to y = arcsin 0.

asked by bella on April 16, 2019
86. ## chem

the pH of a neutral solution at 90 digree celsias is a >7 b < 7 c =7 d both b and c

asked by asdfg on September 8, 2016
87. ## algebra

Solve the inequality. Graph the solution. 2|x+1/3|

asked by allexelle on April 10, 2015
88. ## 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
89. ## algebra

graph the system and write the solution -2x+y=6 y=1/2+3

asked by Anonymous on March 7, 2013
90. ## math

show a graph for solution set 3x>7x+20

asked by shanae on November 6, 2007
91. ## math

General solution Cos^2 +3sin= -3

asked by Wayne on May 19, 2013
92. ## math

Which of the following ordered pairs is a solution of the equation y= -4x^2? A. (-2, 16) B.(1, -8) C. (0, -4)***** D. (2, -16)

asked by nebula🌌 on March 18, 2019
93. ## math

the solution is (2/3,-1/2)(-3,-8) and he formula is f(x)=mx+b given the slope and one point

asked by valentine on August 5, 2014
94. ## Chemistry

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

asked by Eddie on March 23, 2010
95. ## algabra

Solve and graph the solution set.

asked by edie on August 19, 2007
96. ## science

the pH of colorless solution is 3. find its [H+] and [OH-] cancentration

asked by Thomas on September 17, 2012
97. ## algebra

I have to find the solution for (fg)(x) f(x)= -6x-1 g(x)=4x^2 can you show steps please

98. ## Chemistry

How many ml of 1M HCl would you need to make 50.0 mL of 0.125M solution?

asked by Danielle on February 22, 2011
99. ## Chemistry

How many ml of 1M HCl would you need to make 50.0 mL of 0.125M solution?

asked by Danielle on February 22, 2011
100. ## Algebra 4

Determine whether the ordered pair is a solution (-8,3);8x+y,-2

asked by Anonymous on May 12, 2010