# 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 404-
## chemistry

1.0 of a 4.0 solution is added to water so that the final volume is 8.0 .

*asked by tasha on May 24, 2010* -
## Maths

Which equation has (2, -1) as a solution? a. y = 2x - 1 b. y = x + 3* c. y = x - 3 d. y = -2x +1 check my answer plz

*asked by Bill on February 24, 2019* -
## Chemistry

A scientist has 0.46 mL of a solution. How would she convert this volume to microliters?

*asked by Crissi on October 10, 2010* -
## Science

by volume ogueous hydroloric acid solution,

*asked by Araceli on July 7, 2014* -
## 10th grade Chemistry

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

*asked by gab on December 8, 2010* -
## AP Chemistry

What is the pH of a .20M HA solution (Ka=1.0x10^-6) that contains a 0.40M NaA?

*asked by Liz on April 23, 2012* -
## Precipitates

If i used NaCl to try to precipitate Ag+ from a solution, will it be as effective as HCl?

*asked by Chemistry on November 16, 2008* -
## algebra

Can someone please help me with this? Use the set-builder notation to describe the solution. 3(3-8x)+5x

*asked by C on May 26, 2008* -
## algebra

2x^=5-2x find the real solution using the quadratic formula

*asked by sue on September 5, 2014* -
## chemistry

What mass of KOH is necessary to prepare 799.9 mL of a solution having a pH = 11.68?

*asked by justin on November 28, 2010* -
## trigo

Can i have a solution on how i can derive on this answer 4cos^3x - 3 cos x.....please..

*asked by rai zan on September 28, 2014* -
## 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* -
## Calculus

The particular solution of the differential equation dy/dt=2*y for which y(0) = 60 is y = 60e2t y = 60 e0.5t y = 59 + et y = 30et

*asked by nan on March 10, 2016* -
## feedback

Your app is worst. It shows everything except solution of a question

*asked by Ronit on November 1, 2018* -
## maths

find series solution of the differential equation y"+3x^2y'-xy=0

*asked by Anonymous on June 25, 2015* -
## 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* -
## algebra

x= radical x+13+7 is what approx. the solution to th nearest hundredth.

*asked by madawna on November 24, 2012* -
## 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* -
## Chemistry

Calculate the concentration of all species in a 0.240 solution.

*asked by Anonymous on March 27, 2012* -
## 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* -
## 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* -
## math

how can find on the particular solution of the linear DE's d^3y/dx^3+4d^2y/dx^2+4dy/dx=exp(-2x)

*asked by assma on February 21, 2015* -
## Ap chem-Bases

Calculate the pH of a 0.2M solution of Triethylamine, (C2H5)3N, with a Kb of 4.0x10^-4

*asked by Jessica on February 16, 2014* -
## Math

Determine the solution set of 2x-3y

*asked by Maggie on February 21, 2015* -
## Precalculus

Write the equation for the following relation, Submit your solution. P = {(x, y): (1, 0), (2, 4), (3, 8), (4, 12), . . .}

*asked by Kierra McCormick on April 23, 2015* -
## algebra

Can someone please help me with this? Use the set-builder notation to describe the solution. 3(3-8x)+5x

*asked by C on May 26, 2008* -
## bio tech

Describe hpow you would prepare 2 L of a 0.5 g/ml dextrose solution?

*asked by kim on February 21, 2016* -
## Math

1. What is the solution of the matrix equation? |9 4| |-9 -6| | | X =| | |2 1| |-1 -8| A.) |5 -26| |9 -60| B.) |-5 26| |-1 -8| C.) |-5 26| |9 -60| D.) |9 26| |9 1| I think the Answer is B. But I am unsure. Thanks.

*asked by Cassie on April 9, 2014* -
## Math

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

*asked by thomas on February 8, 2012* -
## chem

Why are titrations using permanganate performed in acid solution?

*asked by help on April 28, 2010* -
## 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* -
## math

Find the general solution of cos2x + 3 sin x =2

*asked by tanya on May 3, 2013* -
## calculus

Please help find the solution to the initial value problem dy/dx=(1+2cos^2 x)/y with(y>0), and y=1 when x=0. Thanks.

*asked by John on April 29, 2011* -
## chemistry

if you were to splash a basic solution into your eyes, what should be your immediate response?

*asked by Ana on June 23, 2010* -
## chem

Why are titrations using permanganate performed in acid solution?

*asked by help on April 28, 2010* -
## chemistry

How many grams of KMnO4 should be used to prepare 2.00 L of a 0.500M solution?

*asked by ashley on July 15, 2011* -
## Chemistry

What is the mole fraction of solute in a 3.26 m aqueous solution?

*asked by Maria on January 25, 2013* -
## chemistry

Why are hydrogen ions NEVER found in an aqueous solution?

*asked by kelly on May 7, 2012* -
## chemistry

The pH of a solution is measured to be 5.4. Calculate the following: a) [H3O^+] b)pOH c)[OH^-]

*asked by Jay on June 28, 2010* -
## Chemistry

What is the mass of lithium chloride in 27.8g of a 4.85% (m/m) LiCl solution?

*asked by Elaine on February 7, 2013* -
## Chem ap

What is the concentration of cations of a 2 molar CoCl3 solution?

*asked by David on February 7, 2013* -
## 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* -
## 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* -
## 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* -
## chemistry

how many moles of suctose are in 0.8L of a 2M solution? How many molecules of sucrose is this?

*asked by jrobinson47 on March 6, 2012* -
## 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* -
## math

Find the ordered pair solution of y = - 3x + 5 that corresponds to x = - 2.

*asked by Maureen Koogle on June 23, 2010* -
## MATH 116

Determine whether the given numbers are solutions of the inequality. 1, -17, -19, 3 y-10 > 2y-4 Is 1 a solution?-17?-19?-3???

*asked by ggift on November 14, 2009* -
## chemistry

What is the number of grams of a solute for a 3L of a 2.5 M HCl solution???

*asked by Kim on January 26, 2011* -
## Chemistry

How would you test a solution containing only Co2+ and Fe3+ ions?

*asked by Marie on October 31, 2011* -
## Chemistry

What is the required volume of an acid to prepare 2 L of solution a 10% (v/v).

*asked by Dylan on July 5, 2016* -
## Chemistry

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

*asked by Naomi on January 26, 2010* -
## algebra

What are the solutions of the inequality? −2(3x+2)≥−6x−4 A. x≥0 B. x≤6 C. all real numbers D. no solution

*asked by Nyah on January 5, 2016* -
## Math

What is the weight or volume of solute in 5.5% NaOH solution?

*asked by Cheryl on October 3, 2012* -
## Chemistry

Calculate the molarity of 17.g of NaCl in 881 ml of solution

*asked by Alexa on April 13, 2014* -
## science

Calculate pH of 0.01 M CH3COONa solution if pKa of CH3COOH is 4.74.

*asked by kartikaya on January 7, 2013* -
## Pre-Calc

Determine the solution. x^2=|x|algebraically I have no idea how to proceed with this. Can you please help?

*asked by MUFFY on September 26, 2009* -
## chemistry

what solution of sugar in water has the highest molarity?

*asked by lilly on April 28, 2011* -
## Chemistry

Illustrate how to prepare a 1:3 solution of 0.5M hydrochloric acid

*asked by Adoma on October 24, 2016* -
## Math

What is the smallest member of the solution set of x^2=30-13x?

*asked by Habiba on June 11, 2016* -
## chemistry

What is the % of a solution containing 18.0g of NaCl in 65 ml of water 18.0/65 * 100 = 27% Right? Wrong?

*asked by sarah on April 13, 2015* -
## Chemistry

Balance the following in an acidic solution:1]Fe ----> Fe(OH)2 & 2]NO3 -----> NH4^+

*asked by Genelia on May 5, 2011* -
## Chemistry

Calculate the [H], [OH], pH and the pOH of this solution; 0.0025 M NaOH

*asked by Shane on June 19, 2013* -
## Math

Which of the following ordered pairs is a solution to the inequality y less than or equal to -2x + 8? a. (0, -4)

*asked by Mark on December 29, 2014* -
## 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* -
## Chemistry

What must be the molarity of an aqueous solution of trimethylamine, (CH3)3 N, if it has a PH=11.20?

*asked by Allan on October 2, 2011* -
## math - natural logs

Find the EXACT solution to e^(1-x) = 4^x You must use logs, not just a calculator.

*asked by BJ on October 31, 2011* -
## real number

How many positive factors does 62x(63^3+63^2+63+1)+1 have? (with solution pls... thanks...)

*asked by HELP HELP HELP MNHS on January 26, 2013* -
## Chemestry

HELP!!!!!!A solution made from 19.0 g of Na Br and 500 ml of water has what molarity?

*asked by Cindi on May 4, 2011* -
## Math

Which equation does NOT have the set of all numbers as its solution? 1. |-x| = |x| 2. ||x|| = |x| 3. |-x| = -(-(-x)) 4. -(-x) = x I need help with this problem.

*asked by Misty on December 10, 2014* -
## CHE103

describe the hazards you should be aware of when you use 2.0 M HCl solution

*asked by Abdul on April 13, 2011* -
## Science

Estimate the pH of a solution containing 0.5 L of 0.4 M HClO4 and 0.5 L of 0.2 M NaOH without using a calculator.

*asked by Tina on March 9, 2016* -
## college

what is the mass of solute dissolved in 50.0g of a 12.5% saline solution?

*asked by debbie on December 16, 2010* -
## chemistry

how is silver separated from its soluble salt solution?

*asked by raghib on September 9, 2015* -
## Algebra

Graph the solution to the inequality on the number line |4u-8|=>12

*asked by David on March 25, 2014* -
## Chemistry

how do I determine the Ka for an acid HX if th epH of a 1.00M solution of HX is 4.5

*asked by Jill on November 24, 2012* -
## Chemistry

Calculate the mass percent of a solution containing 10.5 of and 91.5 of H2O.

*asked by Dax on November 24, 2012* -
## math exam tommrow review

find the solution of each equation if the replacement sets are x:{1,3,5,7,9} and y:{2,4,6,8,10}. 3x-9=12 y^2-5y-11=13

*asked by ellis on December 18, 2012* -
## ap chem

What is the pH at 25C of a 0.17 M solution of the acid HClO which has an ionization constant of 3.5 × 10−8?

*asked by Anonymous on February 14, 2011* -
## Chemistry

What mass of Ca(OH) 2 is required to make 1.5 l of a 4.0% (w/v) solution of Ca(OH)2 in water?

*asked by H on September 18, 2012* -
## Chemistry

What is the pH for the potassium propionate solution at the equivalence point?

*asked by Mira on May 3, 2011* -
## chemisry

density and viscosity of a salicyclic acid solution

*asked by arp on February 14, 2010* -
## Chemistry

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

*asked by Jake on May 15, 2012* -
## chemistry

a solution in which no more solid can be dissolved is referred to as ???? Saturated?

*asked by emi on May 6, 2007* -
## Chemistry

What is [OH-] for a 4.72 X 10^-9M HCL solution? Would I just take 1.0X10-14 divided by 4.72X10-9?

*asked by Jake on May 18, 2014* -
## Chemistry help please

What is the pH of a solution whose hydronium ion concentration is 0.0010 M?

*asked by Mary on March 26, 2012* -
## Chemistry help asap

what two ingredients are used to prepare basic buffer solution??

*asked by Naz on May 23, 2016* -
## Chemistry

How would I find the moles of H+ if I have 2.0 M HCl and 2.0 M NaOH solution?

*asked by Sara on October 26, 2010* -
## Chemistry help please

What is the pH of a solution whose hydronium ion concentration is 0.0010 M?

*asked by Mary on March 26, 2012* -
## Chemistry

Calculate [H3O] for a solution of hydrochloric acid that is: pH=2.00 pH=3.00

*asked by Gayla on April 26, 2009* -
## MATH

Find the solution of the given initial value problem. ty'+(t+1)y=t y(ln2)=0 t < 0

*asked by ALEX on February 22, 2011* -
## Anal chem

how much 0.1F HC2H3O2 is required to make 500 ml of solution with a Ph of 4.0?

*asked by gigi on August 5, 2017* -
## 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* -
## Algebra help pls

Which solution is an identity? A 7-(9x + 3)=-9x-4☺☻☺ B 6m-5=7m+5-m C 10p+6-p=12p-3(p-2) D 3y+2=3y-2 Am I correct

*asked by Blaw on September 19, 2017* -
## 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* -
## science

what is the nature of solute particles in electrolyte solution?

*asked by julmuner ibrahim on February 11, 2012* -
## chemistry

The hydrogen-ion concentration of a 0.25 M solution of HCN (Ka = 4.9 ´ 10-10) is I keep getting 1.1 *10^-5

*asked by Mohamad on June 20, 2010* -
## Chemistry

Is 20.0 mL of 1.0M CH3COOH and 10.0mL of 1.0 M NaOH a buffer solution of 3?

*asked by Anne on May 4, 2010* -
## COLLEGE CHEMISTRY

Calculate the pH of a 0.052 NH4Cl aqueous solution

*asked by shanice on November 9, 2010* -
## Chemistry

Is there any way to increase the ionic strength of a solution without increasing the pH?

*asked by Jenny on February 12, 2012*

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