# 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-
## chemistry

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

*asked by diane on December 5, 2010* -
## 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?

*asked by Help please on October 4, 2016* -
## 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* -
## 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* -
## Physics

Is KNO3 soluble in KOH solution?

*asked by Nisha on September 5, 2016* -
## Chemistry

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

*asked by James on May 4, 2016* -
## 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* -
## 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* -
## 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* -
## math

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

*asked by tom on April 4, 2013* -
## 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* -
## algebra

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

*asked by thawk on November 8, 2010* -
## Chemistry

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

*asked by Molly on March 4, 2015* -
## 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* -
## 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* -
## math

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

*asked by Diana on September 4, 2009* -
## 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* -
## 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* -
## math

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

*asked by adriana on April 2, 2013* -
## algebra

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

*asked by nicole on November 1, 2011* -
## 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* -
## chemistry

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

*asked by Anonymous on January 15, 2011* -
## Chemistry

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

*asked by Anonymous on March 4, 2015* -
## 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* -
## Chemistry

how can you prepare 300ml of 15% h2so4 solution

*asked by rone on February 18, 2013* -
## 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* -
## Math

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

*asked by scooby9132002 on May 18, 2009* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## algebra

would 5 trees be a solution to the inequalit inpart b

*asked by janet on October 30, 2009* -
## 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* -
## AP Biology

Why should we test water with Benedict's solution?

*asked by Coral on November 3, 2007* -
## 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* -
## math

is secA*cosA =1 for all A where 0

*asked by mkc on July 29, 2016* -
## 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* -
## Precalculus

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

*asked by Trevor on January 3, 2010* -
## Science

could a solution of a liquid and a gas be soda

*asked by becca on January 8, 2008* -
## chemistry

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

*asked by Anonymous on December 5, 2011* -
## 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* -
## 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* -
## 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* -
## chemistry

Calculate the pH of a 0.0019 M HNO3 solution.

*asked by krystal on February 29, 2012* -
## Chemistry

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

*asked by Pete on November 22, 2010* -
## 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* -
## chemistry

Calculate the pH of a 0.0019 M HNO3 solution. 2.7

*asked by krystal on February 29, 2012* -
## algebra

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

*asked by michelle on February 29, 2012* -
## chemistry

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

*asked by Amber on November 25, 2014* -
## algebra

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

*asked by Becky on March 11, 2008* -
## 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* -
## 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* -
## chemistry

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

*asked by erin on November 29, 2011* -
## biotech

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

*asked by erin on November 29, 2011* -
## English

The sure solution to unemployement is a better quality of education

*asked by Valencia on April 2, 2013* -
## 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* -
## 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* -
## Chemistry

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

*asked by Abasiekeme udoh on March 4, 2019* -
## 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* -
## Chemistry

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

*asked by Mmeso on September 13, 2018* -
## 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* -
## Differential Equations

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

*asked by Brian on February 14, 2013* -
## 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* -
## Math

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

*asked by meow meow kit kat on March 6, 2019* -
## chemistry

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

*asked by Anonymous on December 5, 2011* -
## math

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

*asked by question on July 22, 2009* -
## 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* -
## 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* -
## math graphing please help

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

*asked by roeeeee on January 23, 2019* -
## 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* -
## 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* -
## 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* -
## 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* -
## Chemistry

What is the pH of a saturated zinc hydroxide solution?

*asked by Julian on March 18, 2013* -
## Chemistry

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

*asked by Jessi on April 21, 2009* -
## 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* -
## 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* -
## 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* -
## 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?

*asked by Thaddeus on April 10, 2013* -
## 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* -
## math

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

*asked by anna on May 5, 2016* -
## calculus

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

*asked by gen on November 12, 2010* -
## Math Problem

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

*asked by Lavern on January 15, 2012* -
## math

Write the general solution to y = arcsin 0.

*asked by bella on April 16, 2019* -
## 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* -
## algebra

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

*asked by allexelle on April 10, 2015* -
## 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* -
## algebra

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

*asked by Anonymous on March 7, 2013* -
## math

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

*asked by shanae on November 6, 2007* -
## math

General solution Cos^2 +3sin= -3

*asked by Wayne on May 19, 2013* -
## 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* -
## 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* -
## Chemistry

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

*asked by Eddie on March 23, 2010* -
## algabra

Solve and graph the solution set.

*asked by edie on August 19, 2007* -
## science

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

*asked by Thomas on September 17, 2012* -
## algebra

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

*asked by Alaska Diamond on September 21, 2013* -
## 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* -
## 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* -
## Algebra 4

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

*asked by Anonymous on May 12, 2010*

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