# 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
1. ## 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
2. ## 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
3. ## 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
4. ## 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
5. ## 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
6. ## 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
7. ## 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
8. ## 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
9. ## 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
10. ## 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
11. ## 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
12. ## 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
13. ## 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
14. ## 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
15. ## 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
16. ## 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
17. ## 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
18. ## 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
19. ## 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
20. ## 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
21. ## 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
22. ## 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
23. ## 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
24. ## 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
25. ## non linear equations

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

asked by danni on April 17, 2013
26. ## 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
27. ## health/science

what does the muscular system allow our bones to do

asked by s on February 4, 2019
28. ## Science

What does the autonomic nervous system do?

asked by Brianna on May 7, 2019
29. ## 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
30. ## science

what is the problem with not using the metric system

asked by Eduarda cardoso on January 25, 2013
31. ## Science

What is a transport system in plants

asked by Noor on March 20, 2018
32. ## geography

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

asked by rosie on February 26, 2015
33. ## Algebra 1

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

asked by Esther on February 8, 2011
34. ## Science

What is the first activity of the digestive system?

asked by Diana on February 12, 2015
35. ## 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
36. ## math

what is the system and principle of reasoning ?

asked by Gamechu on May 31, 2019
37. ## Science

What are the diseases of the respiratory system?

asked by lii on April 25, 2013
38. ## mat116

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

asked by Suzanne on November 16, 2010
39. ## geography

command system of mongols

asked by afnan on February 22, 2015
40. ## 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
41. ## History

what was the development of the slavery system?

asked by Merlin on November 3, 2012
42. ## 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
43. ## Science

What are some examples of a stable system?

asked by Anonymous on February 27, 2019
44. ## 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
45. ## math

what is the Japanese multiplication system?

asked by dude on December 24, 2017
46. ## geography

command system of mongols

asked by afnan on February 23, 2015
47. ## algebra 116

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

asked by QP on August 29, 2010
48. ## Algebra 2

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

asked by BC on October 14, 2010
49. ## 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
50. ## algebra 1

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

asked by esther on February 8, 2011
51. ## science

What is the definition of "Organ System"?

asked by Erin on January 20, 2011
52. ## science

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

asked by FORTNITE on November 8, 2018
53. ## partial command system

what is a partial command system

asked by Anonymous on September 6, 2010
54. ## 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
55. ## Social Studies

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

asked by Steve on October 18, 2010
56. ## English

Other people said they had invented the system.

asked by Leslie on December 17, 2018
57. ## Math

How do u graph a system of equations

asked by Hill on January 14, 2016
58. ## 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
59. ## health

How is the nervous system used when you eat

asked by xx on June 3, 2012
60. ## biology

describe a biological system

asked by maria on August 25, 2009
61. ## algebra

graph the system of inequalities y>_ -2 y

asked by aida on January 23, 2010
62. ## physisc

why is nitrogen builds up into your system

asked by Anonymous on August 14, 2013
63. ## 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
64. ## 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
65. ## biology

what is the parts of circulatory system?

asked by preethi on August 29, 2011
66. ## Algebra

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

asked by Tina on October 10, 2009
67. ## IT

why is system Burn-in important?

asked by michael on May 15, 2016
68. ## algebra

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

asked by Cassidy on August 30, 2011
69. ## math

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

asked by clary on May 27, 2012
70. ## algebra

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

asked by Joey on January 12, 2008
71. ## 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
72. ## Health

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

asked by Jimmy on April 21, 2008
73. ## Government

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

asked by Anonymous on November 21, 2015
74. ## Trigonometry

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

asked by Cyndy on July 27, 2012
75. ## Informaton Technology

Why is system Burn-in important?

asked by Sherzz on May 14, 2016
76. ## 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
77. ## 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
78. ## Anntarctic

What is the Antarctic Treaty System?

asked by rawr... im a dinosaur.... rawr on October 13, 2012

80. ## 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
81. ## math

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

asked by yorkie16 on April 10, 2009
82. ## math

Conversions in the Metric System

asked by Anonymous on March 14, 2017
83. ## SOCIAL STUDIES

what is the dewey decimal system?

asked by Kaely on January 5, 2012
84. ## 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
85. ## World History

What is the basis of the feudal system?

asked by Losa on October 24, 2012
86. ## Algebra

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

asked by Nichole on March 6, 2017
87. ## math

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

asked by mike on November 14, 2010
88. ## Algebra

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

asked by Math on July 20, 2014
89. ## mathematics

The base for the hexadecimal system?

asked by Matt on September 26, 2007
90. ## science

how is the si system is used in the scienetific community

asked by khris on August 12, 2009
91. ## science

what are the prefixes in the metrics system

asked by Jen on January 8, 2009
92. ## Algebra

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

93. ## ALEGEBRA

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

asked by SYNESTER on January 7, 2008
94. ## 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
95. ## Biology-Respiratory System

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

asked by Mike on May 20, 2008
96. ## Technology

What is the machanical advantage of this system?

asked by Mzwakhe on April 22, 2016
97. ## algebra

(2x4)x2 in the mod 5 system

asked by Anonymous on May 5, 2012
98. ## 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
99. ## Science

What is the International System of Measurement?

asked by Mariz on September 18, 2008
100. ## ENDOCIRNE SYSTEM

HOW ENDOCRINE SYSTEM FUNCTION

asked by ALEJANDRO on September 13, 2011