# 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 34
1. ## chemistry

2. When 0.354 g of an unknown nonelectrolyte compound was dissolved in 12.5 g of benzene a solution was formed that froze at 4.46°C. (a) Calculate the molar mass of the unknown compound. The freezing point of benzene is 5.48°C, and the Kf of benzene is

asked by Helen on November 14, 2012
2. ## physics

A ferry-boat is 4 m long and 6 m wide, and floats in fresh water. A 400kg horse is loaded onto the ferry. How much deeper will the ferry float when it is loaded with the horse? Show ALL of your work. Include units in your solution.

asked by Ronny on February 6, 2017
3. ## chemistry

2. When 0.354 g of an unknown nonelectrolyte compound was dissolved in 12.5 g of benzene a solution was formed that froze at 4.46°C. (a) Calculate the molar mass of the unknown compound. The freezing point of benzene is 5.48°C, and the Kf of benzene is

asked by Helen on November 15, 2012
4. ## Chemistry

The system absorb 100 J of heat while the system does 100 J of work?

asked by Pedro on May 14, 2018
5. ## math,algebra II

can someone show me examples of what is a practical application of matrices or matrix operations that can be used in a real-world situation. Simple example: Coordinate transformation. An object is located at coordinates (x,y,z) in your coordinate system,

asked by jas on June 5, 2007
6. ## algebra,math

My qustion is for the following the problem reads as follows (x-1)^2 = 7 x-1=+- sqrt 7 x= 1+- sqrt 7 the method they use was factoring in order to simplify the equation to make it easier is this correc? x^2-9x-4=6 x^2-9x-10=0 (x-10)(x+1)=0 What method did

asked by jasmine20 on April 2, 2007
7. ## Algebra

Which cannot describe a system of linear equations? no solution exactly two solutions infinite solutions exactly one solution

asked by Traven on July 16, 2019
8. ## math geometry

P is parallel to q m angle 1 =(6x+y-4) m angle 2 = (x+9y+1) m angle 3 = (11x+2) A. Set up an equation(s) to find x and y. B. Show all work and solve for x and y. C. Use these values to find the values of angles 1, 2, and 3. Cant figure this out at all.

asked by genny on January 19, 2016
9. ## math

The base of a triangle is 10 cm longer than the height. Determine the height of the triangle if its area is 48 cm^2. -I just plugged in number and got 6cm for the height and 16cm for the base. But I need to show work and I cant remember how to solve this.

asked by Kaylee on February 3, 2010
10. ## algebra 2

the 2 unequalities -26

asked by hannah on October 31, 2013
11. ## Math: Differential Equations

Solve the initial value problem y' = y^2, y(0) = 1 and determine the interval where the solution exists. I understand how the final solution comes to y = 1/(1-x), but do not understand how the solution is defined from (-infinity, 1) and not (1, infinity).

asked by Anonymous on October 9, 2014
12. ## Math

A saline solution is 20% salt. How many gallons of water must be added to dilute the mixture to 8 gals of a 15% saline solution? here is my method: using c1V1 = c2V2, (0.2)(V1) = (0.15)(8) V1 = 6 gals So, since 8 gals are required to dilute the saline

asked by Meenaakshi on May 21, 2013
13. ## Math

Tracy Company, a manufacturer of air conditioners, sold 100 units to Thomas Company on November 26. The units have a list price of \$500 each, but Thomas was given a 30% trade discount. The terms of the sale were 2/10, n/30. Thomas uses a periodic inventory

asked by Bobbi Loffredo on March 20, 2011

asked by Betsey on April 14, 2012
15. ## Algebra College

1. Suppose you are in the market for a new home and are interested in a new housing community under construction in a different city. a) The sales representative informs you that there are two floor plans still available, and that there are a total of 56

asked by Kim on October 26, 2008
16. ## CHEMISTRY

I see you took my advice literally about carrying extra places. It isn't necessary to use ALL of those numbers that show up on your calculator. I think 1.5377X + 1.8447Y = 0.944 will be quite sufficient and I suspect even one number fewer still will work

asked by Catie on January 29, 2008
17. ## chemistry

hello this is ellie again. I need help on this one problem A solution of 0.314M KOH is used to neutralize 10.0mL H3PO4 solution. H3PO4(aq) + 3KOH(aq) → K3PO4(aq) + 3H2O(l) If 29.3mL KOH solution is required to reach the endpoint, what is the molarity of

asked by ellie on December 3, 2013
18. ## algebra

1. solve using multipication principle -3a

asked by babygirl on September 5, 2011
19. ## math

solve equation then check for extraneous solution please someone explain this to me. 6/6-4x/=8+4 then one that is solve the inequality s/x+3/4

asked by kevin on August 26, 2012
20. ## Info. Tech (Computer Science)

1.)(a) CPU 1 has speed of 2.6 GH (steps per second) and runs a program which needs 10.9 T steps. (b) CPU 2 has speed of 2.2 GH and runs program which needs 7.3 T steps. ---How long does it take for CPU 1 and CPU 2 to finish the work? (Show all work!)

asked by Nate on November 17, 2010
21. ## Geometry

Jason designed an arch made of wrought iron for the top of a mall entrance. The 11 segments between the two concentric circles are each 1.25 m long. Find the total length of wrought iron used to make the structure. Round the answer to the nearest meter.

asked by Alexa on September 22, 2015
22. ## Chemistry

An aqueous solution is 1.33 molality in method determine the amount fraction of methenal and water

asked by Aman on August 10, 2013
23. ## math help

2x^4-3x^2-7x+1=0 Estimate what the real solution will be using Newton's method. Answers must be 4 decimal places. Let the first guess be x=1.75

asked by Rachel on January 19, 2016
24. ## Math/ Calculus

Given an initial guess of x1 = 1, use the Newton-Raphson Method to fi nd the second approximation x = x2 of the solution of the equation: sqrt(x+3)=x

asked by Angela on April 16, 2013
25. ## Math Help

2x^4-3x^2-7x+1=0 Estimate what the real solution will be using Newton's method. Answers must be 4 decimal places. Let the first guess be x=1.75

asked by Rachel on January 19, 2016
26. ## math

Find the general solution using the method of undetermined coefficients. y''' - 10y'' + 25y' = e^(-x) cos x + e^(5x) + x.

asked by Shane on May 8, 2011
27. ## chemistry

Neoton - Raphsune method in excel that sulibility Ba(Io3) in Ba(No3)2 solution, .02M

28. ## Math

How do you factor a polynomial? Using the FOIL method works with some simple polynomials. FOIL stands for First, Outside, Inside, Last. For example: x^2-4x+4 factors to (x-2)(x-2) Check your work by multiplying them all. x times x is first, x times -2 is

asked by Christian on March 4, 2007
29. ## Biology

Describe how you would prepare 90 mL of a 5 mM NaCl solution from a 2 M NaCl stock solution. Describe your actions–exactly what you would do –step-by-step–when preparing this solution. Also show all calculations. Be sure all amounts include units of

asked by Ki on September 14, 2014
30. ## Chemistry

2. You have a sugar solution (solution A) with concentration x. You pour one-fourth of this solution into a beaker, and add an equivalent volume of water (solution B). a) What is the ratio of sugar in solutions A and B? b) Compare the volumes of soutions A

asked by Jon on January 13, 2007
31. ## Chemistry

It is possible to determine the ionization energy for hydrogen using the Bohr equation. Calculate the ionization energy for an atom of hydrogen, making the assumption that ionization is the transition from n=1 to n=infinity. I don't know how to solve this

asked by A.J. Cooper on November 28, 2011
32. ## biology

I need a general principle found to be consistent through the following systems so I can describe the beneficil aspect of it for each system: muscles, the circulatory system, the respiratory system, the kidneys, and digestion. I find something and then

asked by ryan on August 21, 2010
33. ## chemistry

a) show a balanced neutralization reaction for each. b) Determine how many moles of base are needed to neutralize 2 mles of acid of these reactions. Can you show me the work,using the mole ratio ?? HNO3 + KOH -- H2SO4 + NaOH --

asked by Kelsey on August 16, 2010
34. ## Physic

A 220 g cart moves on an air track (a one-dimensional system in which motion is friction free) at 1.3 m/s. It collides with and sticks to another cart of mass 550 g, which was moving in the opposite direction at 0.80 m/s before the collision. What is the

asked by Anonymous on April 30, 2014
35. ## math

Your local gas stations are having a price war. During the past 7 days they have lowered the price of regular gas by \$.02 each day. Define a variable. Then write and solve an equation to find the total change in gas price. Show your work. n-7x\$0.2 n-\$1.4

asked by Anna-Leah on November 20, 2018
36. ## Algebra

The Yellow Pencil Company sells the best pencils ever made. If the cost of producing x hundred pencils is given by C(x)=0.4x^2-29x+44 and if the revenue generated from the sale of x hundred pencils is R(x)=-0.6x^2+19x. Money is in thousands of dollars. (a)

asked by john on November 24, 2015
37. ## Calc - help needed

Hi, I'm stuck at this question: List all points on the graph of y=tanx on the interval [-3π/2,2π] that have a y-coordinate of (1/radical3). This is my answer, but I keep getting it wrong. Someone, please explain​ how to go about solving this. I have

asked by chizoba on August 8, 2016
38. ## MATH

PART A)find x using the ratio of the sides 12 cm and 16 cm: x/20=12/16. Show your work PART B) find x using the ratio of the sides 6 cm and 8 cm. Show your work PART C) Explain why the answers to a and b should be the same The triangles are 1st one x,12

asked by SHEILA LE BUFF on December 15, 2015
39. ## math

PART A)find x using the ratio of the sides 12 cm and 16 cm: x/20=12/16. Show your work PART B) find x using the ratio of the sides 6 cm and 8 cm. Show your work PART C) Explain why the answers to a and b should be the same The triangles are 1st one x,12

asked by help on December 15, 2015
40. ## maTH

PART A)find x using the ratio of the sides 12 cm and 16 cm: x/20=12/16. Show your work PART B) find x using the ratio of the sides 6 cm and 8 cm. Show your work PART C) Explain why the answers to a and b should be the same The triangles are 1st one x,12

asked by SHEILA LE BUFF on December 15, 2015
41. ## question for Dr.Bob22

The mole fraction of acetic acid (CH3COOH) in an aqueous solution is 0.675. Calculate the molarity of the acetic acid, if the density of the solution is 1.0266 g mL-1. To give a different take on this, here is another way of approaching the problem. I

asked by chemistry on November 11, 2007
42. ## Algebra 1A

I am so lost! Solve the equation and check the solution -6(t-2)-(t+3)=2 The solution to t is ??

asked by Austin on September 23, 2012
43. ## MAT117

SOLVE ^Y+6-1=4 A) The solution to Y=_ OR B)Solution is not a real number Can't figure this one out... This is what I came up w/ Y=^5

asked by Brandon on November 1, 2010
44. ## ALG

Solve. (If there is no solution, enter NO SOLUTION.) y=x^2-x-3 y=-2x+3 (x,y) smaller value larger value

asked by KASAP on May 12, 2014
45. ## pre-calculus

solve the following inequality 16(x^2-1) >16x the solution set is? or there is no solution.

46. ## MAT117

SOLVE ^Y+6-1=4 A) The solution to Y=_ OR B)Solution is not a real number Can't figure this one out... This is what I came up w/ Y=^5

asked by Brandon on November 1, 2010
47. ## calculus

A cable that weighs 6 lb/ft is used to lift 750 lb of coal up a mine shaft 500 ft deep. Find the work done. Show how to approximate the required work by a Riemann sum.

asked by megan on March 15, 2017

5. Which of the following body systems does not rely on the autonomic nervous system to stimulate involuntary events? A. skeletal system B. digestive system C. circulatory system D. respiratory system My Answer skeletal systems

asked by Mstv on June 2, 2014
49. ## Chemistry

What is the final concentration of a solution if 15-mL of a 2.4-M solution was diluted to 100-mL and this process was repeated two more times? Please help me how to work out the problem. I am not just looking for an answer. I really want to learn.

asked by Evin on April 24, 2016
50. ## biological psychlogy

identify one genetic method and explain how this method is used to study genetic factors providing two answers. I have the method: adoption studies iI'm just looking for a way to examples to explain how it is used

asked by sb350 on October 13, 2015
51. ## algebra

the bill(parts and labor) for the repair of a car was \$458. the cost of parts was \$339. the cost of labor was \$34 per hour. write and solve an equation to find the nuber of hours of labor. make sure you show your work.

asked by bre on September 18, 2008
52. ## Algebra

Hi this question was already asked but there is still no correct answer. I can't seem to solve this for x correctly...I got 128 over 55 as an answer which can't be correct. Please help me find the correct answer! Thanks The equation is: .05x-.6(x+2)=.08

asked by Clare on October 12, 2011
53. ## Chemistry

Pre-Lab Questions Data: [mass of copper wire] 0.738 g [standard solutions] solution 1: 0.738 g of copper wire dissolved in 50.00 mL solution solution 2: 1:2 dilution of solution 1 solution 3: 1:4 dilution of solution 1 [absorbance data at lambda(max)]

asked by Jake on March 16, 2009
54. ## CHEM

Calculate q when a system does 54 J of work and its energy is increased by 61 J?? I know the total change in energy of a system is "q + w", but I don't don't how to apply this.

asked by Sai on December 12, 2010
55. ## math

When solving a system using elimination on a TI-84 calculator how do you do it? I forgrt all the steps heres the ones i know 1. 2nd (button) Matrix 2. Edit Matrix A 3. Edit Matrix B 4. 2nd (button) Quit what's next? Thanks

asked by Anonymous on September 16, 2009
56. ## Algebra 1

quadratic equation. ax^2+bx+c=0 Solution 1,only solution. Can you help me I am struggling to work this out.

asked by Cynthia on July 3, 2008
57. ## Accounting

Candace Corporation has decided to introduce a new product that can be manufactured using either a capital-intensive method or a labour-intensive method. The predicted manufacturing costs for each method are as follows: Capital-Intensive Labour-Intensive

asked by Flo on August 16, 2010
58. ## math

Alice is working 2 jobs to save up money for a trip. She works at the ice cream shop for \$9 an hour and babysitting for \$12 an hour. She needs to earn at least \$200 per week and can only work 20 hours per week. Write a system of inequalities to model the

asked by amy on November 15, 2016
59. ## Science

Which of the following is the minimum level of structure needed to perform the function of waste removal? A. body system B. tissue C. cell D. organ C Which two systems work with the muscular system to allow the body to move? A. digestive and urinary B.

asked by Anonymous on January 20, 2014
60. ## Accounting

Assume that at the beginning of 2000, Quick Travel, a FedEx competitor purchased a used Boeing 737 aircraft at a cost of 60,000,000. Quick Travel expects the plane to remain useful for 5 years (5 million miles) and to have a residual value of 5,000,000.

asked by Ronnie on January 1, 2010
61. ## chem

10.0 mL of 0.05 M AgNO3 and 10.0 mL 0.05 M NaCl are combined in a test tube and a precipitate of AgCl forms. After the precipitate is centrifuged down, the remaining solution (called the supernatant) is tested for the concentration of Ag+ ion. The

asked by Brooke on January 30, 2017

A compound of carbon, hydrogen, and oxygen was burned in oxygen, and 2.00 g of the compound produced 2.868 g CO2 and 1.567 g H2O. In another experiment 0.1107g of the compound was dissolved in 25.0 g of water. This solution had a freezing point of -0.0894

asked by MSJO on December 13, 2012
63. ## Chemistry

A compound of carbon, hydrogen, and oxygen was burned in oxygen, and 2.00 g of the compound produced 2.868 g CO2 and 1.567 g H2O. In another experiment 0.1107g of the compound was dissolved in 25.0 g of water. This solution had a freezing point of -0.0894

asked by jojop18 on December 13, 2012
64. ## algebra 2.

Mr. Green, the Herbarium's owner, has come to you with another problem to solve. He wants to create a new sales display featuring giant potted plants and plants in smaller hanging baskets. He wants to set up the display in such a way that he can maximize

asked by piinkkk! on November 5, 2009
65. ## chemistry

Mno4- + So3-2 = Mno2 + sO4-2 (OH-) solve this redox reaction and give me the method also

asked by kiara on September 7, 2013
66. ## Physics

How do you solve this using the component method? 56n, northwest + 38n, 75 degrees east of north

asked by Sabbie on August 27, 2011
67. ## algebra

decide whether each trinomial is a perfect square. if so, factor it. x^2 - 4x + 4 how do i solve this?? i don't understand the method..

asked by brooke on January 27, 2011
68. ## Simplex Method

Solve the linear programming problem by the simplex method. Maximize P = 10x + 6y subject to x + y < 80 3x < 90 x > 0, y > 0 x = y = P =

asked by Leah on April 24, 2011
69. ## math

I'm completely lost withhow u solve this quadratic equation using the square root method 6x^2=1

asked by Jason on April 18, 2010
70. ## maths

Use the quadratic formula to solve the equation x^2-7x+9=0 I've tried to do this manytimes but can't seem to get it. I've other questions like it so if someone could talk me through this one maybe i'd understnad the method better thanks.

asked by susan on April 23, 2011
71. ## Operating research

Use simplex method to solve Maximize p = 30x + 20y+30z subject to x + y+z

asked by Terry on June 17, 2011
72. ## math

asked by Brittney on April 24, 2014
73. ## operation research 1

Use simplex method to solve Maximize p = 30x + 20y+30z subject to x + y+z

asked by mashoo on June 17, 2011
74. ## Calculus - Seperable Equations

Solve the separable differential equation (dy/dx)=y(1+x) for y and find the exact value for y(.3). dy/dx = y(1+x) dy/y = (1+x)dx Integral (dy/y) = Integral (1+x)dx ln (y) = x + (1/2)x^2 + C y = e^(x + (1/2)x^2 + C) y(0.3) = e^(0.345 + C) I am stuck here.

asked by COFFEE on June 26, 2007
75. ## chemistry

a student determines the molar mass of methanol by the method used in this experiment. she found that the equilibrium temperature of a mixture of ice and pure water was .4 degrees Celsius on her thermometer. when she added 10g of her sample to the mixture,

asked by liz on May 22, 2012
76. ## solution of an equation

can someone please give me an example of a solution of an equation An equation is a statment with the equal sign = in it. If we have y=2x+3 and we're asked to find x when y=7 then we would have to solve 7=2x+3 The solution of that equation is x=2. Was

asked by alejandra on September 28, 2006
77. ## math

A firm advertises for workers to address envelopes. Priscilla says she will work 100 hours. Herb will work for 80 hours. If each can address 10,000 envelopes in the time they work, how long would it take them to address 10,000 envelopes if they work

asked by Ashley on September 27, 2017
78. ## Cosine Law NEED HELP QUCIK

For the next three questions, choose which is the most appropriate method to solve the problem, explain your answer. a) SOACAHTOA b) The Sine Law c) The Cosine Law d) The problem cannot be solved without further information 1) Yachts in a race have to sail

asked by Jane on May 27, 2014
79. ## Cosine Law

For the next three questions, choose which is the most appropriate method to solve the problem, explain your answer. a) SOACAHTOA b) The Sine Law c) The Cosine Law d) The problem cannot be solved without further information 1) Yachts in a race have to sail

asked by Jane on May 25, 2014
80. ## Math

1) Solve the equation for p. Identify any extraneous solutions. √p=-1 A) -1 is a solution of the original equation. 1 is an extraneous solution. B) 1 is a solution of the original equation. C) 1 is a solution of the original equation. -1 is an extraneous

asked by Tia on April 22, 2015
81. ## Math

HELP Find the solution for x,y. In the problem... 5x-3y=-11 x-2y=2 Multiply the second equaton by five. 5x-3y=-11 5x-10y=10 subtract the second equation from the first. 7y=-21 solve for y, then put y into either of the beginning equations to solve for x.

82. ## Numerical Analysis

Consider the equation 8x^4 − 12x^3 + 6x^2 − x = 0. For each of the two solutions x = 0 and x = 1/2, decide whether the Bisection Method or Newton’s method will converge faster (say to eight place accuracy), without running the calculation. I don't

asked by Ashley on September 12, 2014
83. ## Math

solve for indicated letter. f=2g, for g what is the solution for g? can someone please tell me how to start this? or how to solve this question?? I would appreciate it much

asked by Kylie on November 11, 2009
84. ## mabathoana high school maseru

A block and tackle system of 5 pulley is used to raise a load of 500N steady through a height of 20m the work done against friction is then 2000J. Calculate the work done By effort, efficiency and effort applied

asked by Mamoeletsi on August 27, 2015
85. ## physics

3 miles to centimeters will someone help with that problem? and tell me how to show my work with all the multiplication and division. like 1 mile over 3 centimeters or whatever (random numbers) but will you show me how and what the answer is please

asked by conversions on September 26, 2010
86. ## prob & stat

Consider the system of components connected as in the accompanying picture. Components 1 and 2 are connected in parallel, so that subsystem works if and only if either 1 or 2 works; since 3 and 4 are connected in series, that subsystem works if and only if

asked by jay on July 11, 2015
87. ## Statistics

The number of books sold over the course of the three-day book fair were: 365, 303, 401. Assume that samples of size 2 are randomly selected with replacement from this population of three values. a. List the different possible samples, and find the mean of

asked by Elizabeth on July 20, 2015
88. ## physics- pressure/gas

Suppose 2500 J of heat are added to 4.1 mol of argon gas at a constant pressure of 120 kPa. (Assume that the argon can be treated as an ideal monatomic gas.) Find the change in internal energy. I started using U = N (3/2 kB T). But I have too many

asked by AC on June 21, 2007
89. ## algebra

Can someone help me solve this story problem? Tom is buying a 42 inch 1080 television on sale for 40% off. If the aspect ratio is 16:9 and the frame around the screen is 1 inch wide,will it fit in an entertainment center with an opening that is 36 inches

asked by Anneliese on January 8, 2017
90. ## problem solving

select a problem that you have worked on but not yet solved, and that you feel you can eventually solve. present the following : a show or describe what you have done so far (it could be that you tell me where to find your work in your notebook) b assess

asked by kakak on December 12, 2014
91. ## solving an exponential equation

Count iblis helped me solve this in another thread. But I am looking for an easier method. Can anyone help? What I have is e^x - 2x = e - 2 Solve for x. (The answer is 0.351) Thanks. That is a transcendental equation that has to be solved by iteration. A

asked by Jen on December 18, 2006
92. ## Trig

In triangle ABC, A=35 degrees, a=43, and c=20. Determine whether ABC has no solution, one solution, or two solutions. Then solve the triangle. Round to the nearest tenth. no solution.

asked by Jon on March 7, 2008
93. ## finance

10. A firm has a beta of 1.2. The market return equals 14 percent and the risk-free rate of return equals 6 percent. The estimated cost of common stock equity is _____ percent. (Please calculate the arithmetic solution and show your work)

asked by Vanessa on January 11, 2012
94. ## algebra

Solve the following system of equations. You will type your x value in the first part and the y value in the second part of the question. If the answer is no solution then type NS in both parts and if the the answer is infinite solutions then type I in

asked by Johny on January 14, 2019
95. ## algebra

Solve the following system of equations. You will type your x value in the first part and the y value in the second part of the question. If the answer is no solution then type NS in both parts and if the the answer is infinite solutions then type I in

asked by Anonymous on January 11, 2018
96. ## Calculus

Okay so I have a question on my assignment that says: You are given that tan(y) = x. Find sin(y)^2. Express your answer in terms of x. I know its derivatives, and I've tried taking the derivatives of both etc, and got them both to come out as cos(y)^2,

asked by Tracy on October 21, 2006
97. ## Math

Are the ratios 25/45 and 15/27 proportional? Explain and show your work (2 points) A 10-acre field produced 750 bushels of corn. At that rate, ho much corn be produced at a 14-acre field? Show all of your work. (2 points)

asked by Ella on November 16, 2017
98. ## Chemistry

Assuming all volume measurements are made at the same temperature and pressure, how many liters of carbon dioxide gas can be produced when 12.8 liters of oxygen gas react with excess carbon monoxide? Show all of the work used to solve this problem.

asked by Bob on March 29, 2011
99. ## AP Chemistry

Please show me how to do this step by step I would appreciate it We add excess Na2CrO4 solution to 42.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.520

asked by Hannah on September 10, 2015
100. ## physics

a +35x10^-6 C point charge is placed 32 cm from an identical +32x10^-6 C charge. how much work would be required to move a +50.0x10^-6 C test charge from a point midway between them to a point 12 cm closer to either of the charges? please show work and

asked by leess on February 23, 2008