# 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 247-
## Physics

a) Family Smith has already installed PV in their house. Now, they also want to cover their needs for warm water with solar energy. For this, they consider having a solar thermal water heating system. Considering that the need for warm water is 100L/day,

*asked by youlifex on October 24, 2013* -
## math

Tyrone has $60 and his sister has $135. Both get an allowance of $5 each week. Tyrone decides to save his entire allowance, but his sister spends all of hers each week plus an additional $10 each week. After how many weeks will they each have the same

*asked by Jenna on June 2, 2007* -
## Maths again

For the transformation w=z^2, show that as z moves once round the circle centre O and radius 2, w moves twice round centre O radius 4. I am okay finding the radius and centre of the locus but how do I show it moves twice roundfor w for z turning once. See

*asked by Jake on February 24, 2007* -
## chemistry

Which of the following safety precautions is unnecessary for the 'Mass Percent of ASA' experiment? A. 1M NaOH is basic and corrosive. Skin contact should be avoided. B. Do not ingest the aspirin used in this experiment as it may be contaminated with other

*asked by jared on May 10, 2007* -
## physics

A beam of electrons with momentum p=10^-23 kg m/s passed through a narrow slit of width d=10^-5 m. What is the uncertainty component of the momentum in the x-direction due to the uncertainty principle (approximately)? a. change in p greater or equal to

*asked by Hil on December 23, 2013* -
## math

Percents Unit Test 1. Write a ratio and a percent for the shaded area. (1 point) , 25% , 31.25% , 20% , 25% 2. Model 25% on a grid. (1 point) 3. Write the ratio as a percent. In the small country of Varia, a bill becomes law only if

*asked by Fun on June 21, 2018* -
## maths

A and B together can do a piece of work in 12 days; B and C together can do it in 15 days. If A is twice as good a workman as C, in how many days A alone will do the same work

*asked by Anonymous on January 8, 2013* -
## maths

A and B together can do a piece of work in 12 days; B and C together can do it in 15 days. If A is twice as good a workman as C, in how many days A alone will do the same work?

*asked by Anonymous on January 7, 2013* -
## Chemistry

Consider the following chemical reaction 2HCL+ Ca(OH)2 CaCl2+2H2O You have mixed 30.00ml of 0.150 M HCl solution with 20.00ml of 0.100m Ca(OH)2 solution what is the molarity of the HCl, Ca( OH)2 and CaCl2 after the reaction has stopped

*asked by Ruffles on December 3, 2013* -
## math

a solution must contain at least 30% orange juice but not more than 20% ginger ale in addition to its other ingredients. If the punch bowl is to hold 400 cups of this solution, what are the amounts of orange juice and ginger ale?

*asked by brenda on May 8, 2016* -
## chemistry

write out the reaction, predicting products where applicable. Zinc metal is added to a solution of copper(II) sulfate. Copper metal is produced and zinc sulfate is left in solution.

*asked by amber on December 10, 2007* -
## science

How would you balance this reaction(it's a half reaction problem): H2O2+ClO2-->ClO2+O2 (basic solution) thanks. i'm just confused b/c its a basic solution. all i know is that you have to add OH to it or something. thanks again for helping. add OH and you

*asked by michelle on June 12, 2007* -
## AP Chemistry

Calculate the concentration of Hg2+ ions in a saturated solution of HgS(s). (Ksp=1.7×10^52) Answer in units of mol/L What volume of solution contains one Hg2+ ion? Answer in units of L/ion

*asked by Gabriella on January 8, 2014* -
## calculus

Find the solution to the differential equation dy/dx = (x^3)/(y^2), where y(2) = 3 I have: The integral of: dy(y^2) = the integral of: dx(x^3) (y^3)/3 = (x^4)/4 The answer is supposed to come out to be y= the cube root of: ( 3/4x + 15 ) Thanks The general

*asked by Suzie on May 6, 2007* -
## CHEM-102

Calculate the pH of a solution prepared by mixing 10.00mL of 0.50M NaOH and 20.00mL of 0.50M benzoic acid solution. (Benzoic acid is monoprotic; its ionization constant is 6.7x10^-5).

*asked by Christian on March 27, 2011* -
## chemistry

A solution contains 4.44% by mass of NaI in water. Calculate the molarity of the NaI, if the density of the solution is 1.2711 g mL-1. i got the answer to be 8.48 M... the percent mass is irrelevant information, right? i figured out the answer just by the

*asked by keely on November 11, 2007* -
## math, help

What are two solutions for 3x-y=0 am i correct on this inorder to graph (0,0) and (2,6) Because the line goes through (0,0) so how do i get two solutions from that line? You can get two solutions from that line because the first solution (0,0) is from the

*asked by jasmine20 on February 10, 2007* -
## University

17. neutralizing 20 ml 5.66% potassium hydroxide solution density of 1.053 g / cm3 matter 12.1 ml sulfuric acid density of 1.052 g / cm3. Determine the concentration (%) sulfuric acid solution.

*asked by Anonymous on December 2, 2016* -
## Chemistry

Diethylamine (C2H5)2NH, is a weak base that ionizes in water,a 0.600 M solution of (C2H5)2NH is 4.65% ionized at 25 degrees Celsius. -Calculate the pH of the solution. -Calculate the Kb for diethylamine.

*asked by Chris on December 5, 2012* -
## Chemistry

when 2g of NaOH were dissolved in 149 g of H2o in a calorimeter at 24 degrees C the temperature of the solution went up to 29 degrees C. If the calorimeter constant was 11 cal/C find delta H for the solution of one mole of NaOH in H2O

*asked by Dexter on October 19, 2014* -
## Maths

f(x)=1+2cos2x Find min/max, period, general solution, sketch Period is 360 divided by 2? For the general solution I know it is going to be +/- (just one number) but I'm not sure how to get the value and have no idea bout the min/max

*asked by Anonymous on April 26, 2009* -
## Chemistry

Given the following equation: 2CH3CO2H + Ca(OH)2 --> Ca(CH3CO2)2 +H2O If you start with 30 ml of a 5% solution of acetic acid, how much of a .1M Ca(OH)2 solution would it take to completely neutralize the acid? I'm not quite sure how to start? Should I

*asked by Christie on December 4, 2012* -
## Science

100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. Calculate final molarity of h2s04 solution if final density 1.25g/ml. Ans is 0.227M

*asked by Anonymous on April 26, 2016* -
## chemistry

A student placed 10 g of Mg(OH)2 into a flask and added 500ml of water. The student took 100 ml of the Mg(OH)2 solution and reacted with HCl(aq). If 13.75 ml of 0.010M HCL reacted with the OH(aq), was was the concentration of hydroxide ion in the 100 ml

*asked by Anne on November 7, 2011* -
## non linear equations

find all solutions of the system. y+x^2=-5x y-5x=25

*asked by danni on April 17, 2013* -
## math

What is the value of u in the following system of linear equations? 4u + 3v = –1 3u + 2v = 1 a) 5 b)-11/2 C)-7 d)19/3

*asked by joe on April 2, 2013* -
## health/science

what does the muscular system allow our bones to do

*asked by s on February 4, 2019* -
## Science

What does the autonomic nervous system do?

*asked by Brianna on May 7, 2019* -
## Math

t=2x-y+5 t=y-2z+10 t=2z-2x+6 Based on the system of equations above, what is the value of t?

*asked by Beth on February 10, 2015* -
## science

what is the problem with not using the metric system

*asked by Eduarda cardoso on January 25, 2013* -
## Science

What is a transport system in plants

*asked by Noor on March 20, 2018* -
## geography

can any one tell me about the command system of mongols?

*asked by rosie on February 26, 2015* -
## Algebra 1

Graph the system of inequality x+2y 0. Thank you

*asked by Esther on February 8, 2011* -
## Science

What is the first activity of the digestive system?

*asked by Diana on February 12, 2015* -
## algebra

how many systems does this system have -3x + 6y = 10 -3x + 6y = -4 a. none b. one c. infinite d. two

*asked by elizabeth on January 15, 2019* -
## math

what is the system and principle of reasoning ?

*asked by Gamechu on May 31, 2019* -
## Science

What are the diseases of the respiratory system?

*asked by lii on April 25, 2013* -
## mat116

Graph the system of inequalities: x+3y or= 0

*asked by Suzanne on November 16, 2010* -
## geography

command system of mongols

*asked by afnan on February 22, 2015* -
## math

What are the solutions for the following system of equations? y=8x+7 y=-x^2-5x+7

*asked by Alex on January 14, 2015* -
## History

what was the development of the slavery system?

*asked by Merlin on November 3, 2012* -
## math

What is the value of y in the system shown? y=12x-3 y=-2x+4 Thanks

*asked by Lyn on April 9, 2015* -
## Science

What are some examples of a stable system?

*asked by Anonymous on February 27, 2019* -
## algebra

the solutions to the system of equations y= 2x and y =-x + 3 is a)2,1 b)(-1,2) c)2,-1) d)(1,2)

*asked by david on December 15, 2010* -
## math

what is the Japanese multiplication system?

*asked by dude on December 24, 2017* -
## geography

command system of mongols

*asked by afnan on February 23, 2015* -
## algebra 116

Graph the system of inequalities y>= -4, x >= 5

*asked by QP on August 29, 2010* -
## Algebra 2

Complete the system for no possible solutions: x+y+z = 7 y+z = ? y+z=?

*asked by BC on October 14, 2010* -
## algebra 1

How many solutions does this system have-2x+y=3 6x=9-3y A. one B. none C. infinite D. two A??

*asked by sydney on December 3, 2017* -
## algebra 1

Graph the system of inequality x+2y 0. Thank you

*asked by esther on February 8, 2011* -
## science

What is the definition of "Organ System"?

*asked by Erin on January 20, 2011* -
## science

Which of the following is not a function of the circulatory system? A

*asked by FORTNITE on November 8, 2018* -
## partial command system

what is a partial command system

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

What is the value of u in the following system of linear equations? 4u + 3v = –1 3u + 2v = 1 a) 5 b)-11/2 C)-7 d)19/3

*asked by tom on April 2, 2013* -
## Social Studies

What are the 3 terms given to the U.S. system of economics?

*asked by Steve on October 18, 2010* -
## English

Other people said they had invented the system.

*asked by Leslie on December 17, 2018* -
## Math

How do u graph a system of equations

*asked by Hill on January 14, 2016* -
## Alg2

How can (1/4)x-3=(1/2)x+8 be setup as a system of equations? 4y + 4x = −12 2y + 2x = 16 4y − x = −12 2y − x = 16 4y + x = −12 2y + x = 16 4y − 4x = −12 2y − 2x = 16

*asked by ? on February 27, 2016* -
## health

How is the nervous system used when you eat

*asked by xx on June 3, 2012* -
## biology

describe a biological system

*asked by maria on August 25, 2009* -
## algebra

graph the system of inequalities y>_ -2 y

*asked by aida on January 23, 2010* -
## physisc

why is nitrogen builds up into your system

*asked by Anonymous on August 14, 2013* -
## Math for Steve

How many solutions does the system of equations have? y=4x+4 y=4x-3 y=-6x-2 y+2=-6x

*asked by Gabby on January 13, 2014* -
## Algebra 1

How many solutions does this system of equations have ?? y= 4x + 3 and 2y - 8x =3

*asked by Sierra Elizabeth on January 4, 2016* -
## biology

what is the parts of circulatory system?

*asked by preethi on August 29, 2011* -
## Algebra

Graphing the system of inequalities. y>= -5 x>= 6

*asked by Tina on October 10, 2009* -
## IT

why is system Burn-in important?

*asked by michael on May 15, 2016* -
## algebra

How do you make a table out of the system. 3x + 4y = 18 x + 3y = 11?

*asked by Cassidy on August 30, 2011* -
## math

How many solutions are there for the linear system x – y = –5 and x + y = 1?

*asked by clary on May 27, 2012* -
## algebra

how many solutions does the linear system have? x=3 y= -2

*asked by Joey on January 12, 2008* -
## algebra

how do you substitute these system of equations 1.y=-3x-3 y=3x-3 2.y=4x-6 y=x thank you!

*asked by sara on September 23, 2011* -
## Health

I need help on a report on Muscular System!!!!!!!!!!!!!!! P/

*asked by Jimmy on April 21, 2008* -
## Government

Why does the U.S. have a dual judicial system

*asked by Anonymous on November 21, 2015* -
## Trigonometry

How many solutions does the system {y=x, y=tanx have?

*asked by Cyndy on July 27, 2012* -
## Informaton Technology

Why is system Burn-in important?

*asked by Sherzz on May 14, 2016* -
## Math

System of equations 1). 2/5x + 5/6y=6 Y/3=x/2+9. 2).4x+2=3y+5 2y-1=x+2 These are my last two problems and I can t get it Thanks for the help

*asked by Alena grace on February 3, 2014* -
## math

a=b+c-2 a=c-d+9 a=b-d+11 Based on the system of equations above, what is the value of a? a) 2 b) 9 c) 10 d) 11 e) 20

*asked by janie on July 12, 2012* -
## Anntarctic

What is the Antarctic Treaty System?

*asked by rawr... im a dinosaur.... rawr on October 13, 2012* -
## computer

the computer system grade 6

*asked by khadija on October 30, 2016* -
## Math

How many solutions does this system have? –3x + 6y = 10 –3x + 6y = –4 A.none B.one*** C.infinite D.two

*asked by Kaai97 on January 11, 2016* -
## math

find the value of y in the modular 11 system. 10+y = 1

*asked by yorkie16 on April 10, 2009* -
## math

Conversions in the Metric System

*asked by Anonymous on March 14, 2017* -
## SOCIAL STUDIES

what is the dewey decimal system?

*asked by Kaely on January 5, 2012* -
## algebra

What is the value for the coefficient determinant (D) in the following system? 4x – 3y = 16 3x + 7y = –25 A. –37 B. –19 C. 37 D. 52

*asked by Mitch on July 22, 2012* -
## World History

What is the basis of the feudal system?

*asked by Losa on October 24, 2012* -
## Algebra

Slove each system graphically. X+y=8 and x-y=4

*asked by Nichole on March 6, 2017* -
## math

Evaluate (3 + 4) + 1 in the mod 5 system

*asked by mike on November 14, 2010* -
## Algebra

I need some help solving this system of equations: 5x - y = 18 –4x – 2y = –6

*asked by Math on July 20, 2014* -
## mathematics

The base for the hexadecimal system?

*asked by Matt on September 26, 2007* -
## science

how is the si system is used in the scienetific community

*asked by khris on August 12, 2009* -
## science

what are the prefixes in the metrics system

*asked by Jen on January 8, 2009* -
## Algebra

How many solutions does this system of equations have? X-2y=6 and 3x-6y=18

*asked by Caden on February 4, 2016* -
## ALEGEBRA

HOW MANY SOLUTIONS DOES THE LINEAR SYSTEM HAVE? Y=2X+4 Y=2

*asked by SYNESTER on January 7, 2008* -
## Algebra 1

How many solutions does the system of equations have? x=-4y+4 and 2x+8y=8

*asked by Steve on December 23, 2014* -
## Biology-Respiratory System

What can you do to keep your respiratory System functioning well?? Thanks

*asked by Mike on May 20, 2008* -
## Technology

What is the machanical advantage of this system?

*asked by Mzwakhe on April 22, 2016* -
## algebra

(2x4)x2 in the mod 5 system

*asked by Anonymous on May 5, 2012* -
## math for elemetary school teachers

need to create a number system using only: A=1, B=2, C=3, D=4 and Zero=0. Help

*asked by Cynthia on June 4, 2011* -
## Science

What is the International System of Measurement?

*asked by Mariz on September 18, 2008* -
## ENDOCIRNE SYSTEM

HOW ENDOCRINE SYSTEM FUNCTION

*asked by ALEJANDRO on September 13, 2011*

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