# 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

92,096 questions, page 92
1. ## science

If the current in a wire is at 0.5 A and the voltage is measured at 100 volts, what is the resistance in the wire? Show all work and include the proper units.

asked by Anonymous on April 22, 2013
2. ## Calculus

Consider the curve given by y^2 = 2+xy (a) show that dy/dx= y/(2y-x) (b) Find all points (x,y) on the curve where the line tangent to the curve has slope 1/2. (c) Show that there are now points (x,y) on the curve where the line tangent to the curve is

asked by Mathew on October 2, 2013
3. ## Chemistry

If 8.5g of pure ammonium phosphate , (NH4)3PO4(s), is dissolved in distilled water to make 400mL of solution, what are the concentrations (in moles per litre) of ions in the solution. How would I solve this type of stoichiometric problem. I know the steps

asked by Kristien on March 5, 2013
4. ## Chemistry

If 8.5g of pure ammonium phosphate , (NH4)3PO4(s), is dissolved in distilled water to make 400mL of solution, what are the concentrations (in moles per litre) of ions in the solution. How would I solve this type of stoichiometric problem. I know the steps

asked by Kristien on March 5, 2013
5. ## Math

Part 1: When writing linear equations, how do you determine which form of a line to use? Part 2: Choose 1 set of points from the choices below. Then, solve the problem and post your solution, showing your steps. Write an equation in point-slope form for

asked by Katie on January 8, 2014
6. ## Math - x-intercepts and y-intercepts

Hi, can someone help me with intercepts. find the intercepts of f(x) = x^2 - 6x - 2 can someone show how to work this problem. thanks.

asked by CheezyReezy on June 9, 2011
7. ## math

True or False: sin(-85)=-sin(85) I need to show my work, how do I do so?

asked by anthony on March 11, 2011
8. ## Algebra1b

Need help with problem -4x=8 Please show me how to work problem Well divide over the -4 so you can find x -4x=8 x= -2

asked by Tim Helms on August 20, 2007
9. ## Pre-Calculus

Assume sin A = sin B. If A = π/8, find B. Please show work so I'll know what to do.

asked by Mickey on February 1, 2012
10. ## MATH - CONFUSED!!!

5/12 = -2/3 c The answer is c=-5/8 I can't figure out how they got this answer. Please show and explain the work. Thank you.

asked by andra on March 11, 2014
11. ## pre - CALCULUS

Find the specified vector or scalar. Show your work. u = -4i + 1j and v = 4i + 1j; Find ‖𝑢 + 𝑣‖.

asked by Ciara on April 10, 2015
12. ## Math - Calculus 1

Approximate using derivatives. (Must show work using derivatives!) Do not use a calculator: (1.1)^4 - (1.1)^2

asked by James on October 7, 2016
13. ## math

simplify 4 root of 500 over 4 root of 5 show work

asked by karina on August 26, 2015
14. ## math

lim (2x^2+3x-2)/ (2x-1) the lim is x->1/2 [ans:5/2 but i get 3/2) can someone show me the calculation work.

asked by ella on July 20, 2011
15. ## chemistry

0.050 kg of 4.0% (m/m) MgCl2 the answer is 2.0g MgCl2 how do you show the work

asked by Reina B. on April 24, 2014
16. ## Chemistry (reposts#2)

A solution is prepared by dissolving 5.00 g of ferric chloride in enough water to make 500.0 mL of stock solution. A 50.0 mL aliquot (portion) of this stock solution is then removed and added to 75.0 mL of water. Calculate the concentrations of all ions in

asked by Anonymous on October 25, 2013
17. ## Chemistry(reposts #1)

A solution is prepared by dissolving 5.00 g of stannic nitrate in enough water to make 250.0 mL of stock solution. A 15.0 mL aliquot (portion) of this stock solution is then removed and added to 75.0 mL of water. Calculate the concentrations of all ions in

asked by Anonymous on October 25, 2013
18. ## Chemistry

A chemist makes a solution of K2SO4 by dissolving 21.7 g K2SO4 in water to make 100.0 mL of solution. What is the concentration of SO42− ions in the solution? Assume that K2SO4 is the only solute in the solution. The molar mass of K2SO4 is 174.27 g/mol.

asked by Jamie on July 30, 2017
19. ## college biology

____________ are distributed throughout the body, making up the monocyte-macrophage system or reticuloendothelial system.

asked by Cristina on February 24, 2009
20. ## US History

How did the feudal system and manor system help to organize life in Europe during the Middle Ages?

asked by Mykey on September 28, 2018
21. ## history

can someone compare and contrast a multiparty system (a systems with three or more political parties) and a one-party system

asked by cortey on October 25, 2015

what do you think the advantages and disadvantages are to commision system of payment over the fee or incentive system? I need to compare the two of them.

asked by Cher on March 25, 2007
23. ## Civics or S.S

What countries (if there is any) avoid the US's manufacturing because they do not want to switch Imperial system to the metric system? Thanks for the help! ~Kimmy

asked by Kimmy P. on October 5, 2013
24. ## Math-measurement

What is the official name of our system of measurement in America? All I ever hear about is the metric system, but I don't know what ours is called. Thanks

asked by Ellie on March 2, 2008
25. ## CALC 2

Let an = Hn - ln(n), where Hn is the nth harmonic number Hn = 1 + 1/2 + .... + 1/n a. Show that an > 0 for n>= 1 (Hint: show Hn >= integral from 1 to n+1 dx/x) b. Show {an} is decreasing by interpreting an - an+1 as a positive area. (Hint: use the previous

asked by Bae on April 6, 2014
26. ## Calc 2

Question 2 Let an = Hn - ln(n), where Hn is the nth harmonic number Hn = 1 + 1/2 + .... + 1/n a. Show that an > 0 for n>= 1 (Hint: show Hn >= integral from 1 to n+1 dx/x) b. Show {an} is decreasing by interpreting an - an+1 as a positive area. (Hint: use

asked by Bae on April 6, 2014
27. ## Chemistry

Calculate mole solute in solution? I added 0.2968g of an unknown to a solution. I found that the molality of the solution is 0.085m and there is 0.0156kg of solvent. Calculate the moles of solute present in solution? Thanks!

asked by Jones on September 8, 2012
28. ## Chemistry

56mL of a stock solution of hydrobromic acid, HBr, is added to 85mL of water, yielding a solution having a pH of 1.0. What was the molarity of the stock solution? I know Molarity = moles of solute/ liters of solution

asked by Danielle on March 31, 2015
29. ## chemistry

Two solutions were prepared. The first was a 0.672 M solution of aluminum hydroxide and the second was a 0.405 M sulfuric acid solution. 1.) If a total of 500 mL of aluminum hydroxide solution was prepared, how many grams of the solute (AL(OH)3) would have

asked by Jordan on May 7, 2014
30. ## Math

Earn al least \$150 a week. \$10 per hour working for a farmer. \$5 per hour babysitting. can work at most 25 hours per week. Write and graph a system of linear inequalities.

asked by Mary on March 1, 2011
31. ## AP Chemistry

How much work is done by the system when 2.00 moles of O2 expand from a volume of 3.00 liters to a volume of 9.6 liters against a constant external pressure of 0.0100 atm answer in units of joules

asked by Gabriella on October 11, 2013
32. ## Math

I am 55, my motherlaw is 70, my friend is 40. How do I figure out the LCM and the GCF. My home assignment is listed as= List the ages of two people in your life, one older than you and one younger than you. It would be best if the younger person was 15

asked by melvin on January 25, 2011
33. ## Chemistry

The student wanted to be sure he had made Calcium Oxide. He crushed some heated limestone and added water. The mixture got hot. The student cooled the mixture and filtered it. This gave a colourless solution and a white solid that was left in the filter

34. ## Chemistry Honors

Arthur is performing a lab which requires a 0.2 M solution of calcium hydroxide. However, the only calcium hydroxide solution available has a concentration of 0.5 M. How can Arthur dilute the 0.5 M solution to make 10 mL of a 0.2 M solution? A.He needs to

asked by Tony on December 16, 2014
35. ## Chemistry - General, Hess's Law

In an experiment, 11.6g of a salt was dissolved in 100.0ml of water contained in the above calorimeter, all at an initial tmperature of 24.5 degrees Celsius. After dissolution was complete, the temperatur was 31.8C. The specific heat of the solution is

asked by Sahar on July 24, 2009
36. ## algebra

moonshine has 50 liters of a 70% alcohol solution.how many liters of pure alcohol must be added to obtain an 80% alcohol solution? The alcohol content is .7*50=35 liters. Then, adding alcohol... 35+V=.80*(50+V) solve for V, volume alcohol added

asked by anonymous on June 8, 2007
37. ## English

Identify the subject, verb, compliment and prepositional phrase 1. Arizonia is, therefore, an active battelfield in the war against the removal of these endangered species. 2. Authorized dealers must give purchasers permit tags as proof of legal sale. 3.

asked by Hayden on August 22, 2019
38. ## science

how does the circulatory system and respiratory system related to ATP and cellular respiration?

asked by 🎑riceasian🎑 on April 4, 2019
39. ## Computer Science

What is a database management system? What are it's advantages over conventional file processing system?

asked by Vince on June 1, 2010
40. ## biology

What is the revelence in the order of development of the foetal nervous system before the cardiovascular system?

asked by Jen on October 15, 2007
41. ## fluids

What are the three benefits of a fluid system as the prime mover in a system? Explain each benefit.

asked by emma on April 1, 2015
42. ## American Government

what are some of the benefits of federal bureaucracy system and some drawbacks to the current bureaucratic system??

43. ## biology

How does the circulatory system and the lymphatic system support reproduction and passing along genetics?

asked by Liz on June 27, 2009
44. ## Algebra

True or false. 1. The system (2x - y = 3) and (x + 3y = 5) is consistent and independent. 2. There are infinitely many solutions to the system (2x - y = 3 and y = 2x + 5).

asked by McKenna Louise on January 4, 2014
45. ## Civics

What countries (if there is any) avoid the US's manufacturing because they do not want to switch Imperial system to the metric system?

asked by Unknown on October 5, 2013
46. ## English

Can you please help me work out phrasal verbs related to work? When do you think will you come ...... to work? What are the possible prepositions? back .... are there others? What about "down"? Can you think of any phrasal verbs used with work (apart from

asked by Matthew on March 22, 2012
47. ## bussness, if that's even a subject

PLEASE HELP 1.Create a diagram of the U.S banking system and the Federal Reserve System(FRS). Include special financial services of the banking system in your diagram. Be creative in this activity. Pretend you have been asked to teach the structure and

asked by sueme on March 21, 2018
48. ## Computers

You have administrative rights to your computer running windows 7. You cannot find some of the operating system files on your system volume. What to do to make the appear? A. Uncheck hide protected operating system Giles in folder options. B. Uncheck hide

asked by Anthony on January 13, 2014
49. ## Chemistry

Calculate the molar solubility of BaSO4 in a solution in which [H3O+] is 2.5 M. I can almost solve this on my own. If you know the following equations: BaSO4 = Ba2+ + SO42- SO42- + H+ = HSO4- HSO4- + H+ = H2SO4 and I know [H+] = 2.5 M along with the

asked by Jay on October 25, 2010
50. ## physics

A stone is thrown vertically upward. On its way up it passes point A with speed, v and point B, 3 m higher than A, with speed 1/2v. Calculate a) the speed v and b) the max height reached by the stone above point B. I can't find the equation You need to

asked by jenny on September 17, 2006
51. ## Chemistry

At 20 degrees celcius the vapor pressure of toluene is 22 mmhg and that of benzene is 75 mmhg. Assume an ideal solution, equimolar in benzene and toluene. At 20 degrees celcius what is the mole fraction of benzene in the vapor in equilibrium with this

asked by Marissa on April 7, 2015
52. ## US History

1) How do we solve the Social Security problems ? 2) List pros and cons I need to write a one page report which solution I support and why ? I need some assistance on writing this..

53. ## Math

Solve the polynomial equation and graphy it on a number line. Express the solution set and interval notation. and which brackets to use either () or [] 15X^2 < 14x + 1

asked by Mike on October 19, 2007
54. ## trig

How would I solve the following equation for x? 2 sin^2(x) + 3 tanx secx = 2 I've tried the problems from different approaches, but couldn't come up with a solution. Could you please provide your thought process. It would be greatly appreciated. Thanks!

asked by Bethany on October 1, 2010
55. ## Chemistry

what volume of concentrated 18M H2SO4 is required to prepare 250mL of a 6.0M solution? how would you solve this problem? i know it has something to do with the molarity formula but no idea how to apply it

asked by Lena on March 4, 2014

How would I solve the following equation for x? 2 sin^2(x) + 3 tanx secx = 2 I've tried the problems from different approaches, but couldn't come up with a solution. Could you please provide your thought process. It would be greatly appreciated. Thanks!

asked by Brittany on October 1, 2010
57. ## history

what was the second party system?why did it arise?in what ways was it markedly different from the political system of the era of the nation's founders?

asked by lexie on November 28, 2018
58. ## Science

The lung is to the respiratory system as the ____ is to the integumentary system. A) heart B) kidney C)hand D)brain B

asked by Hayden on November 30, 2016
59. ## Health

Which organ is part of both the respiratory system in the digestive system? A. Epiglottis B. Nose C. Larynx

asked by Help pls quick on March 14, 2016
60. ## physics

Knowing that in most all movement situations the mass of the system stays constant, how do you get the momentum of a system to change?

asked by kat on September 20, 2015
61. ## socials 11

explain what increased privatization of the healthcare system would entail, and list the pros & cons of such a system.

asked by alyssa on July 23, 2013

Another term for capitalist system is ..? My answer: market economy But at the same time I think it's laissez-faire system!

asked by Anonymous on April 30, 2012
63. ## U.S History

Forming the U.S, A system was developed in which both the federal government and the states had powers. What kind of system is this called?

asked by COOL on January 22, 2007
64. ## soc402

Compare and contrast the roles the prison system, the family, and the social stratification system play

asked by rusty on August 19, 2010
65. ## Biology

this system is a ___________ system in which measurements are expressed in multiples of _____________ or _________of a basic unit.

asked by Kelsie on August 12, 2012
66. ## Physics

a system consists of four particles how many terms appear in the expression for the total gravitational potential energy of the system

asked by Mary on October 22, 2011

i need to gather information about E-commerce and there are questions i don't get. such as, how is the communication system is used and discuss some situations in which the system is used?

asked by Anonymous on December 5, 2008
68. ## History8

The Supreme Court ruled that the ____________________ was unconstitutional. a.Tariff system b. American System c. slavery d. all of the above d?

asked by mathidislikeperson on January 16, 2014
69. ## Science

In the system shown above m1 = 9.5kg and m2 = 2.6kg. If the coefficient of kinetic friction UK = 0.15 and the system is released from rest

asked by John on January 22, 2018
70. ## Differential Equations

For the following initial value problem: dy/dt=1/((y+1)(t-2)) a)Find a formula for the solution. b) State the domain of definition of the solution. c) Describe what happens to the solution as it approaches the limit of its domain of definition. Why can't

asked by Erica on January 31, 2013
71. ## math

A boat travels from one port A to port B, travelling 126 km, upstream (against the current) at a uniform speed, and the trip takes 6 hours.  On the way back (downstream), the trip only takes 4.5 hours. Set up and solve a system of equations to find out

asked by jenn on May 22, 2017
72. ## programming

Using python write a program that does the following: •Create the logic for a program whose main() method prompts a user for 1000 numbers and stores them in a list. •Pass the array to a method that reverses the order of the numbers. •In the main

asked by Christina on April 17, 2015
73. ## Computer Science

pseudocode for an application class named Monogram. Its main () method holds your first, middle, and last initials, respectively. Create a method to which you pass the three initials and that displays the initials twice, once in the order of first, middle

asked by Tierra on October 13, 2017
74. ## hydrocarbons

hi I am learning about Hydrocarbons, and naming them is there any steps I shoul follow when naming them becuase I honeslty don't understand! thanks for your help!!!1 First of all you should know that rules govern the IUPAC system. I would learn that system

asked by kyle on June 16, 2006
75. ## Statistics

Suppose a multiple-choice test has 10 questions each with 5 choices. If a student guesses randomly. What is the probability that they get an B or better. ( they get at least a 80% on the exam) make sure to declare a binomial random variable and show all

asked by John on August 5, 2015
76. ## buss./stats

a sample of the personal files of eight male employees revealed that during a six month period they lost the following number of days due to illness 2, 0, 6, 3, 10, 4, 1, 2 calculate the standard deviation show your work

asked by tim on September 2, 2011
77. ## Math

At the end of the course David averaged a 90% on Tests; 80% on Quizzes; 60% on Quick Checks; 90% on Discussions; 100% on Participation and 95% on Sample Work. What would be his final percentage to the nearest tenth and please show how you got your answer!

78. ## Math 115 3

#1 2/3 - 1/6 + 5/9 #2 4 1/3 - 3 1/9 + 2 1/2 #3 Find the five-number summary of the following set of numbers. (Show the work and label your answers.) 335, 234, 187, 394, 237, 452, 300, 201, 303

asked by Deb on January 9, 2009
79. ## chem

supose 1.25 mol of N2 and 50.0g of O2 are moxied together. a)which one is the limiting reactant? b) what is the maximum mass in grams of NO2 that can be produced from the mixture? N2(g) + 2O2(g)=2NO2(g) ***please just show me how to set up the equations I

asked by julia on November 9, 2010
80. ## algebra

Completely factor the following expressions. Please show work/explain t^2+4tv+4v2 4x^2-8x-12+6x 144-9p^2 5c^2-24cd-5d^2 w^2-17w+42 256z^2-4-192z^2+3 2a^2c^3-14bc^3+32c^3d^2 35g^2+6g-9 3j^3-51j^2+210j

asked by Amanda on December 4, 2012
81. ## Science

-Explain how and when the universe formed according to the big bang theory? -Explain how and when our solar system formed? -Describe one observation astronomers use to show that the universe is Expanding?

asked by Sarah on January 31, 2016
82. ## Algebra 2

Jack is selling wristbands and headbands to earn money for camp. He earns \$2 for each wristband and \$3 for each headband. He wants to earn at least \$50. He needs to sell at least 5 wristbands. Which system of inequalities is shown in the graph of the

asked by Sandra on November 8, 2015
83. ## Algebra 1

Please, I am very confused in the Systems of Equations and Inequalities Unit Test that is only 27 questions. The test starts with: 1.Which graph represents the solution to the given system? y = –x + 2 and y = 3x – 1 I am in 8th grade but take 9th grade

asked by kachow on January 22, 2018
84. ## Calculus - Newton's Method

Use the Newton's Method to approximate the real root of the equation: f(x)=x-2+cosx=0 a) What is the iterative equation of Newton's method of the given equation? b) Iterate the equation with starting point x1=5 until you get a repetition of the four digits

asked by Jaime on March 23, 2017
85. ## Algebra

Mary has a total of \$5000 invested in two accounts. One account pays 5% and the other 8%. Her interest in the first year was \$331. Write and solve a system of equations to find out how much she has invested in both accounts.

asked by Steveo on March 10, 2014
86. ## Algebra

Mary has a total of \$5000 invested in two accounts. One account pays 5% and the other 8%. Her interest in the first year was \$331. Write and solve a system of equations to find out how much she has invested in both accounts.

asked by BrianP on March 2, 2014
87. ## algebra

The sides of a triangle have measures of x, x, and y, and the perimeter of the triangle is 46. The measure y is 4 centimeters longer than the measure x. Write two equations which represent the two sentences. Solve the system you wrote for this using any

asked by brandon on September 1, 2010
88. ## Algebra

Mary has a total of \$5000 invested in two accounts. One account pays 5% and the other 8%. Her interest in the first year was \$331. Write and solve a system of equations to find out how much she has invested in both accounts.

asked by Steveo on March 3, 2014
89. ## algebra

Mary has a total of \$5000 invested in two accounts. One account pays 5% and the other 8%. Her interest in the first year was \$331. Write and solve a system of equations to find out how much she has invested in both accounts

asked by ann on March 26, 2014
90. ## Algebra

Solve the following system of linear inequalities by graphing. x-3y>6 3x+2y>12 For the first equation I came up with y-3/2x+6 For the graph: could someone explain in detail what side of the line I graph? Thanks!!!!

asked by Bee on September 1, 2007
91. ## algebra

Mary has a total of \$5000 invested in two accounts. One account pays 5% and the other 8%. Her interest in the first year was \$331. Write and solve a system of equations to find out how much she has invested in both accounts.

asked by billy on March 4, 2014
92. ## Algebra

Mary has a total of \$5000 invested in two accounts. One account pays 5% and the other 8%. Her interest in the first year was \$331. Write and solve a system of equations to find out how much she has invested in both accounts.

asked by Steveo on February 27, 2014
93. ## Problem Solving

Nick is chief engineer in a phosphate fertilizer plant that generates more than 1 million tons per year of gypsum, a waste collected in a nearby pile. Over many years, the pile has grown into a mountain containing 40 million tons of waste. There is little

asked by Aya on November 25, 2011
94. ## Problem Solving

Nick is chief engineer in a phosphate fertilizer plant that generates more than 1 million tons per year of gypsum, a waste collected in a nearby pile. Over many years, the pile has grown into a mountain containing 40 million tons of waste. There is little

asked by Aya on November 25, 2011
95. ## History

Which of the following statements best describes the purpose of the checks and balances system A) The checks and balances system was designed to make sure that each branch of government knew everything about the other two branches were doing at all times.

asked by Yo on May 27, 2019
96. ## MATH..-HELP ME PLEASE GUYS..THIS DUE TMORROW!!!!..

Suppose tank A consist of 500 liter brine with 500gm salt dissolved in it, whereas in tank B containing 500 liter of water. Water is allowed to enter tank A at a rate of 30 liter/minute, and that mixed solution flow from tank A to tank B at a rate of 40

asked by cecyl on April 24, 2013
97. ## math

Brent has #3.35 in quarters and dimes. He has 23 coins in all. How many quarters and dimes does he have? Write a system of equations to solve

asked by Brenna on February 11, 2013
98. ## Algebra

Solve with a system of equations. Amanda pays 10.00 per month plus 100.00 Brita pays 20.00 per month

asked by Paul Redington on December 17, 2012
99. ## Algebra Question

I need to solve the system of equations letting z be the parameter 7x+y+7z=-12 -3x+4y+6z=-1 This is suppose to be the right answer {-47/31-22/31z-43/31-63/31z,z} I keep getting {-22/31-47-31z-63/31-43/31z,z}

asked by mike on December 19, 2009
100. ## Chemistry

1.350g of insoluble carbonate, MCO3 was dissolved in 250cm^3 of a 0.203 mol/dm^3 HCL solution. The resulting solution was boiled off to remove all carbon dioxide produced. 25.0 cm^3 of the solution required 24.10cm^3 of 0.100 mol/dm^3 sodium hydroxide

asked by Ellen Cameron on March 22, 2014