# 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 407-
## trigonometry

is the value 3pi/2 is a solution for the equation 2sin^2x-sinx-1=0

*asked by Dakeva on August 4, 2011* -
## Science

How should the solution of the (Fe(H2O)5(SCN)2+ complex be disposed of?

*asked by Okafor on September 15, 2014* -
## Chemistry

how do you make 400 ml pf 2 Osm solution of Mg CL2?

*asked by dee on January 27, 2016* -
## Chemistry

What is the pOH of a 0.2M buffer solution of NH 4 + 0.2M NH4NO3 at 25 ° C. PKP = 4.74

*asked by Nayara on January 26, 2016* -
## Chemistry

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

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

Write the solution of the pair of linear equations 4x + 2y = 5 and x -2y=0

*asked by janvi on January 9, 2017* -
## chemistry

Why are hydrogen ions NEVER found in an aqueous solution?

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

how does CO2 affect the titer of a solution of NaOH ?

*asked by josh on September 13, 2014* -
## Analytical Chemistry

principles behind the dilution and aliquoting of the NaOH solution

*asked by Charie on September 13, 2014* -
## Math

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

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

what are the example of suspension,colloid and solution found in your house

*asked by geraldine on July 11, 2009* -
## linear algebra

these equation are certain to have the solution x=y=0 for which values of c is there a whole line of solutions? cx+2y=0 2x+ay=0

*asked by chad on October 6, 2010* -
## Algebra

Find five solution sets for the linear equation 3x - 5y = 15.

*asked by Elizabeth on February 17, 2015* -
## chemistry

Calculate the pH of a 2.5x10-5 M lithium hydroxide solution.

*asked by Liz on May 2, 2012* -
## CHEM 1412 general

What is the pH of a solution that is 0.0 100 M in HClO and 0.0300 M in NaClO

*asked by chemistryhelpneeded on April 30, 2012* -
## Chemistry

What is the freezing point of a 0.5m aqueous solution of C6H12O6?

*asked by Georgette on January 18, 2011* -
## math

which is the solution for x in terms of the variables in the equation x/y -z = rw a)x=y (z+rw) b)x=z/y (rw) c)x=rw+yz d)x=y+1/2(ryz)

*asked by Anonymous on January 18, 2011* -
## Chemistry URGENT

Help. what is the formula to figure out the total mass of a solution?

*asked by jazz on April 28, 2014* -
## math

which is the solution for x in terms of the variables in the equation x/y -z = rw a) x=y (z+rw) b) x= z/y (rw) c) x= rw+yz d) x= y+1/2(rwz)

*asked by Anonymous on January 18, 2011* -
## science

Explain how you would prepare a sulphuric acid solution.

*asked by Chali on May 12, 2016* -
## Chemisty

How many grams of HNO3 will be contained in 300 mL of a 5 N solution?

*asked by Nelson on January 30, 2017* -
## Trigonometry

the number of solution of |sinx| = |cos3x| in the interval (-2π,3π)

*asked by Gaurav on January 31, 2017* -
## algebra. help!

Is 4x-3=19 true, false, or open? Which of the following is a solution to the equation 16=4x-4? a. -5 b. -4 c. 5 d. 16

*asked by Hannah on September 24, 2014* -
## Chemistry

calculate [H] and [OH] for a .01M calcium hydroxide solution?

*asked by Morgan on May 20, 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* -
## Chemistry

How many grams of NaCl will you need to mix 200ml of a 2.3M solution?

*asked by Dennese on June 2, 2015* -
## algebra

determine whether the ordered pair is a solution of the inequality (-8,5);4x+y

*asked by Julie S. on July 26, 2011* -
## General chemistry

Calculate the molarity of 500.0 ml solution containing 26.5g Na2CO3

*asked by Chin on January 23, 2017* -
## science

Why the solution of aluminium sulphate in water is not clear

*asked by jerry on January 1, 2017* -
## chemistry

Calculate the molarity of 2.05 L of a solution containing 1.51 g of dissolved KBr

*asked by jessica on February 9, 2012* -
## lab

How much 38%Hcl will be used to prepare N/3.05 solution in 2litre water.

*asked by abc on January 18, 2013* -
## science

Why the solution of aluminium sulphate in water is not clear

*asked by nidhi on January 1, 2017* -
## chemistry

Calculate the pH of a saturated solution of Sr(OH)2. The Ksp for Sr(OH)2 is 3.2x10^-4.

*asked by Aly on February 15, 2015* -
## chemsitry

the ph of a .030M C2H5 COOH solution is 3.20. What is this acids Ka?

*asked by ryan on May 12, 2012* -
## algebra please help!!!!

Write the inequality that represents the solution set for −20/11 y > −9/17.

*asked by 15634 on November 14, 2013* -
## 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

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

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

what is the nature of solute particles in electrolyte solution?

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

Verify that 7pi/6 is a solution to 2sin2x–sinx=1.

*asked by Tabitha on January 20, 2011* -
## 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* -
## Biology

You have been asked to make 200ml of 50% detergent solution (v/v). How would you do it?

*asked by Anonymous on January 19, 2015* -
## chemistry

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

*asked by lea on May 11, 2013* -
## math

Prove that sinx=x for x is a real number has only one solution at x=0

*asked by Andre on February 15, 2016* -
## Jkr public school

mole fraction of solute is 0.4 what is molality of solution

*asked by Manish on July 22, 2015* -
## Chemistry

the pH of 10.00 mL of 0.100 M HCl after adding 10.00 mL of indicator solution

*asked by Kev on June 12, 2011* -
## math

am i correct? Determine which ordered pair is a solution of y= -5x + 10 a. (-15, 5)***** b.(2,0) c.(-1,-5) d.(3,25)

*asked by ShannonPanda on April 17, 2018* -
## chemistry

How many moles of KBr are there in 35.8ml of a 0.172M solution?

*asked by twynna on February 13, 2011* -
## Chemistry 12

How do we determine the specific gravity of a solution? and what unit is it in?

*asked by JM on September 18, 2011* -
## 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* -
## algebra

How big is the solution set for an equation that cannot be solved

*asked by Justin on September 9, 2010* -
## chemistery

in a solution of pH of 3.26, the molar concentration of the hydronium ion is ?

*asked by ogb on December 9, 2012* -
## 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* -
## NEED help ON MATH PLZ

Graph the solution set on a number line : 3x+4>-8

*asked by David on December 12, 2012* -
## 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* -
## 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* -
## chemistry

what is the final M solution prepared by diluting 5.0 mL of 6.0 M HCl to 60.0 mL

*asked by Elizabeth on October 13, 2014* -
## MATH I just need explanation very easy ( for you)

Completing the Squares F(x) =x^2+3x+2 F(x)=0 X^2+3x+2=0 WHY DIDN'T IT BECOME -X^2-3X-2 ? ( EXPLAIN THIS PLEASE) Next for the solution X^2+3x+3(3/2)^2 = -2+(3/2)^2 (X+3/2)^2=-2+9/4 (X+3/2)^2 = 9/4 -8/4 =1/4 ( WHERE DID THEY GET 8/ 4?

*asked by Miracle on February 15, 2016* -
## Physics -HS Honors

When computing the gravitation force, how do you know what the direction of the solution?

*asked by Joan on March 11, 2008* -
## Science

A solution has been prepared by dissolving 0.63 g of HNO3 in 100 ml.What is its pH value ?

*asked by Anindita on December 8, 2016* -
## chemistry

what is the mass of 20mL of a solution that has a specific gravity of 1.69

*asked by john on August 30, 2011* -
## chdem

What is the pH of the solution created by combining 2.70 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq

*asked by Anonymous on August 20, 2008* -
## chemistry

How many moles of KBr are there in 35.8ml of a 0.172M solution?

*asked by twynna on February 9, 2011* -
## chemistry

How many moles of KBr are there in 35.8ml of a 0.172M solution?

*asked by twynna on February 9, 2011* -
## 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* -
## chemistry

How would your calculated %P2O5 value be affected if you had not used this blank solution

*asked by sami on December 4, 2015* -
## Chemistry

What is the osmolality of 1.1% NaCl salt solution? How can I calculate this?

*asked by Mirza on April 27, 2016* -
## math

give exact and approximate solution to the third decimal (x-6)^=18

*asked by tami on July 7, 2012* -
## math - inequalities

How many integers are common to the solution sets of both inequalities? x+7 ≥ 3x 3x+4 ≤ 5x

*asked by Maggie on December 14, 2013* -
## Chemistry

how do I do this problem 0.700 mol of Na2S in 1.55 of solution?

*asked by Sam on October 17, 2013* -
## chemistry

Calculate the pH of a 0.35 M solution of dimethylamine, (CH3)2NH.

*asked by donna on December 7, 2009* -
## chemistry

calculate the concentration of ammonium nitrate solution.

*asked by Anonymous on August 17, 2014* -
## Math

Using substitution, tell whether the ordered pair is a solution to the equation: y=5x;(15,-3)

*asked by Amy on September 26, 2016* -
## Chemistry

A detergent solution has a pH of 11.63 at 25°C. What is the hydroxide-ion [OH-] concentration?

*asked by S on February 21, 2012* -
## chemistry

these is 0.1M HCl of 100ml of that solution in a beaker,calculate pH?

*asked by kabelo on February 12, 2011* -
## 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

Balance in acid solution PH3+ I2-> H3PO4+ I-

*asked by Joseph on September 6, 2010* -
## math

How to find the solution set in a+bi form for this equation? 6x^2+4x+1=0 PLEASE HELP!THANKS!!!!

*asked by Momi on February 22, 2008* -
## 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* -
## 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

Compound Interest formula solution P[1+r/100]t?

*asked by Subham on March 25, 2017* -
## chemistry

What is the pH of a saturated solution of silver hydroxide, given Ksp =1.56*10^-8

*asked by Victoria on December 7, 2012* -
## Chemistry

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

*asked by Anonymous on March 11, 2010* -
## math

find x if (x,-2) is a solution to the equation 3x+2y=-7. my answer was x=1 but it was wrong.

*asked by Anonymous on August 20, 2014* -
## Genral Chemistry

What are the pOH and pH of a 0.0125M solution of potassium KOH

*asked by Anonymous on April 17, 2012* -
## math

If E,N,O,T,and W each represent a different integer, can you find more than on solution to this problem?

*asked by christy on February 10, 2011* -
## Algebra 2 Rational Equations

What is the solution set of the equation? I know the answer is {-1} I just don't know how to get there. X^2-16 x-3 --------- = ------- -1 (x+4)(x+2) (x+2)

*asked by Josh on December 6, 2012* -
## chemistry

how many grams of sodium chloride are there in 2.5 L of a 0.4% w/v solution?. need to know how to figure this out

*asked by wendy on January 28, 2011* -
## Chemistry

How many equivalents are in 1.75L of a 8.2M solution of sulfuric acid.

*asked by Sam on January 22, 2013* -
## science

what is the molarity of a solution of 232 g of NaCl in 2.1 of water?

*asked by willie on January 8, 2013* -
## Civics and Economics

what was the problem and solution in the Electoral College Compromise?

*asked by Tweety on September 14, 2010* -
## chemistry

How many milliliters of a 0.50 M solution contain 14.0 g of BaCl2 (Barium Chloride)?

*asked by Emily on September 14, 2010* -
## Chem

How would I make a 0.25M solution of sodium bisulfite?

*asked by Talia on June 28, 2011* -
## math

describe a solution in which you would use more than one unit to measure length. tell why?

*asked by lerne on January 4, 2010* -
## AP Chemistry

calculate the ph of a 0.10 M CoCl3 solution. The ka value for Co(H20)6 is 1.0x10^-5

*asked by Anonymous on February 25, 2010* -
## 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* -
## algebra

Graph the solution of each linear inequality. y

*asked by janet on December 22, 2009* -
## algebra 11

How do you write the solution to represent the point if intersection?

*asked by katie on September 13, 2011* -
## math

Write the inequality that represents the solution set for −15/9 y

*asked by z on February 20, 2017* -
## Statistics

What would be an example with solution of the Poisson distribution in the frequency of repurchases?

*asked by Patte on May 21, 2018* -
## 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*

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