# 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 93
1. ## Chem

I need to calcuted the molarity from this 12.5 g of ethylene glycol antifreeze dissolved in o.100kg of water. Density of solution is 1.0 g/mL I know molarity if mole of solute / L of solution. I am confused on how to find the L of solution. Do I add 12.5

asked by Please please helppppp!!!!! on February 15, 2013
2. ## Science

I need to calcuted the molarity from this 12.5 g of ethylene glycol antifreeze dissolved in o.100kg of water. Density of solution is 1.0 g/mL I know molarity if mole of solute / L of solution. I am confused on how to find the L of solution. Do I add 12.5

asked by K on February 15, 2013
3. ## CHEMISTRY

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

asked by Anonymous on October 17, 2013
4. ## Physics

One method of estimating the temperature at the center of the sun is based on the Ideal Gas Law. Assume the center consists of gases whose average M = 0.70 kg/kmol, density= 91000 kg/m3 and pressure = 1.39 x1011 atm. Calculate the temperature (in kelvins)

asked by Anonymous on June 16, 2016
5. ## Computer Science

Using the operations push(E obj), peek(), pop(), empty() give a Java implementation of the method // Reverses the elements in the stack //and returns the result. // The stack passed as an argument to //reverse() will be // destroyed upon return. public

asked by Rob on March 11, 2010
6. ## Algebra

Steve is making bags of mixed nuts. Almonds are \$5 per pound & Cashews are \$12 per pound. Steve charges \$56 per 7 pound bag. 1. Write a system of equations that can be used to determine how many pounds of almonds & how many pounds of cashews Steve uses. 2.

asked by Kim on July 18, 2018
7. ## AP Physics C

An earth satellite, the mass of which is 1000 kg, is in a circular orbit 1000 km above the surface of the earth. It is desired to transfer it to a circular orbit 1500 km above the surface. The amount of work that must be done to accomplish this is A. 3.43

asked by Maxium on November 20, 2011
8. ## science is hardddd!!!!

Can I Have An Example Of A Closed System?? Please use easy words that I can understand, Im not that smart and i'm only in 7th grade. Also can you give me an example of an Open System?? Thank You.

asked by PLEASEEEE on January 24, 2013
9. ## eth/125

Sociologists point out that gender diffrences are maintained through a.systematic socialization b.the legal system c.the class system d. All of these

asked by beckylynn on July 10, 2013
10. ## social studies Part 1 unit test

Justinian’s code became the backbone of modern Europe’s 1.Phone system 2 alphabets 3 legal system 4 religions

asked by ABN on October 18, 2017
11. ## chem-entropy

a glassblower heats glass (the system) to its softening temperature. Is the entrophy change of the system is positive or negative?

asked by Brynn on April 9, 2012
12. ## Science

The opening to the tracheal system (respiratory system) in insects is the spiracle. trachea. alveolus. bronchus. stomata.

asked by Emma on April 13, 2016
13. ## Physics

In the system shown in the figure, suppose the block has a mass of 2.7kg , the spring has a force constant of 500N/m , and the coefficient of kinetic friction between the block and the floor is 0.18. Find the work done on the block by the spring and by

asked by Hannah on October 9, 2014
14. ## chemistry

When the glucose solution described in part A is connected to an unknown solution via a semipermeable membrane, the unknown solution level rises. Based on this information, what can be said about these two solutions? a.) The unknown solution had the lower

asked by david on February 24, 2010
15. ## chemistry

When the glucose solution described in part A is connected to an unknown solution via a semipermeable membrane, the unknown solution level rises. Based on this information, what can be said about these two solutions? a.) The unknown solution had the lower

asked by david on February 24, 2010
16. ## Algebra 2

1. What is the first step for solving this system by substitution? 3x-2y=8 x+7y=10 2. How many solutions does this system of equations have? 3y-6x=12 y-2x=4

asked by Audrey on October 5, 2007
17. ## Chemistry

List at least four distinct advantages of the metric system over "our" measurement system.

asked by teetee on March 8, 2012
18. ## IPT

i need help with E-commerce. like where and how is the system used (i'm doing it about an online bookstore.. and discuss some situations in which the system is used.

asked by Anonymous on December 5, 2008
19. ## math

what is the meaningof hindu arabics system and roman numaration system

asked by jenine on June 26, 2010
20. ## Math

What are three differences between an inconsistent system and a consistent and independent system? Explain.

asked by Anonymous on January 21, 2013
21. ## algebra

Maurice drove 400 km from Edmonton to Battleford in 1 hour less time than it took Martin to drive the same route from Battleford to Edmonton. If Maurice drove 20 km/h faster than Martin, at what speed did each of them drive? Show a complete algebraic

asked by Shay on February 13, 2007
22. ## Math

I have the following chart that I am supposed to find the percent increase in one step. The directions specifically say not to use a two step method. 10.5 12.5 14.9 17.7 21.1 25.1 So I divide 12.5 by 10.5, 14.9 by 12.5, etc. When I do this (and round) I

asked by Sami on February 4, 2016
23. ## Math

I have the following chart that I am supposed to find the percent increase in one step. The directions specifically say not to use a two step method. 10.5 12.5 14.9 17.7 21.1 25.1 So I divide 12.5 by 10.5, 14.9 by 12.5, etc. When I do this (and round) I

asked by Sami on February 4, 2016
24. ## math

pls help me proffesors! I need solution to this question, please show me the steps involve. The mean of the scores of three students in a class is 9. If the modal score is 11, find the lowest score.

asked by Banko on November 29, 2016
25. ## chemistry

A solution is prepared by dissolving 17.1grams of sucrose, c12h22o11, in 275grams of h20. a)what is the molar mass of sucrose? I know the formula to use, but can someone show me how do to it, by actually plugging in the numbers.

asked by Miley on April 6, 2008
26. ## College Math II

Show a complete solution to each problem. Find the exact length of the side of a square whose diagonal is 3 feet. I am having problems understanding how you figure out this problem. Can someone help me? Thanks.

asked by Lori on November 21, 2009
27. ## Chemistry

I just need someone to show me how these problems are done then i can do them myself The Ka values of H2CO3 are shown below. Ka1 4.6 10-7 Ka2 4.4 10-11 What is the pH of a 0.15 M solution of Na2CO3? that one i tried to write out all the equations witht

asked by Amy on March 8, 2009
28. ## Biology

Please Explain thoroughly. A cell exists in a solution of 10% salt and has an internal concentration of 90% salt. Draw this scenario. Label its tonicity. Show where water would flow.

asked by Drake on March 6, 2014
29. ## Chemistry

Determine the molarity of a sodium hydroxide solution? if 37.34 mL of it are required to neutralize 1.922 g of citric acid. balanced equation- 3NaOH(aq)+H3C6H5O7-->3H2O(l)+NaC6H5O7(aq… ***Plesae show steps.

asked by Cynthia on March 7, 2012
30. ## Math

PLEASE SHOW YOUR WORK.. Marty paid \$72 for a jacket that had been marked down 20%. Create a linear model to represent this and use it to calculate the original price of the jacket.

asked by Alyssa on January 21, 2015
31. ## Algebra Math

Calculate the slant height for the given cone. Round to the nearest tenth. Diameter = 18cm Height= 7cm 11.2 cm 12.5 cm 14.8 cm 11.4 cm show work on how you got the answer :)

asked by ssssllllloooovvee on March 13, 2018
32. ## Essential Mathematics

A builder estimates that the cost of building a house is \$132,000. If he adds 20% for profit, for what price will he sell the house? (must show work)

asked by Tamir on May 19, 2009
33. ## 8th Grade Math

Write an equation and show all work. The sum of three consecutive odd numbers is 111. What is the smallest of the three numbers? (I don't understand the question >.

asked by Cassidy on September 22, 2013
34. ## algebra

List all possible rational zeros for the polynomial below. Find all real zeros and factor completely. Please show all your work. f(x) = 2x^4 + 19x^3 + 37x^2 - 55x - 75

asked by edward on December 20, 2011
35. ## Algebra

A conic section has the equation x2 + y2 + 10x + 8y = 40. Determine the following: type of conic, domain and range, axes of symmetry, and center. Show your work.

asked by Aaron on December 15, 2016
36. ## physics help!

I don't get this problem! Please show work. Thanks!! The de Broglie wavelength of a proton in a particle accelerator is 3.60 x 10^-14 m. Determine the kinetic energy (in joules) of the proton.

asked by Jessie on April 23, 2012
37. ## ALGEBRA 2

In triangle ABC , angle C is a right angle. Find the remaining sides and angles. Round your answers to the nearest tenth. Show your work

asked by SAM on November 28, 2014
38. ## math/algebra

can someone check my answer: 3ã486 my answer is 27ã6 if not show me where I went wrong please you are right. (did you see my post to you earlier on how to create square root sign? Does it not work for you?) 3√486 = 3√81*√6 =27√6

asked by dee on July 29, 2007
39. ## 6th grade math

S 4 cups of cereal. The box states that one serving of cereal is equal ti 4/5 cup. How many servings did Sandra eat? Please explain and show work!

asked by ALEXANDAR on December 26, 2014
40. ## Calculus

Find the exact value of the slope of the line which is tangent to the curve given by the equation r = 2 + cos θ at θ=pi/2. You must show your work. My answer is "-1" but my friend has "1/2". Which answer is correct?

asked by Alice on May 10, 2019
41. ## math

The radius of a cylinder is 3.5 ft. The height is 14 ft. Find the surface area and volume of the cylinder to the nearest tenth of a foot. Show your work. Need help asap

asked by todoroki on May 7, 2019
42. ## chem

calculate the number of moles of glycine(gly)(C2H5NO2) an amino acid found in proteins in a 36.2g sample of glycine. can you show work

asked by lisa on March 28, 2012
43. ## Statistics

Suppose. Population of test-scores is normally distributed with mean 65 and standard deviation 13 x~n (65,13) if you select a test at randome what is the probability that the score is below 60 or that it is between 65 and 70 please show work!

asked by Alexa on March 10, 2013
44. ## surveying math

I need help with this problem and I need to show my work. Can anyone help me? A vertical angle of -40 is recorded between A and B. The slope distance, after meteorological corrections, is 806.388 m. What is the horizontal distance between A and B?

asked by Kasey on October 15, 2010
45. ## math

If a car has an initial velocity of 103m/s and accelerates at 1m/s for 3 seconds, what will its final velocity be? Can you please show me how to work this question out with math answers and explain it to me. Thank you.

asked by jo on October 10, 2009
46. ## Math

Can you please help me select at least five numbers; 0 (zero), two even, and two odd numbers and do a simple substitution of number for variable in a formula. And can you explain each step and show the work on how you came up with the answer please thank

asked by John on August 14, 2011
47. ## statistics

. The average age at which a woman gets married in the U.S. is µ = 27 with a standard deviation of σ = 5.5. Use this information to answer the following questions. Show Your Work! A. What proportion marries at age 30 or more?

asked by collette on September 27, 2013
48. ## Pyshics

13. A car traveling at 60 km/h will skid 30 m when its brakes are locked. If the same care is traveling at 180 km/h, what will be the skidding distance? Be sure to show all work to support your answer.

asked by Cyndal on July 25, 2016
49. ## Chemistry

Express the rate of the reaction 2C2H6 + 7O2 -> 4CO2 + 6H2O in terms of: a. Delta [C2H6] b. Delta [CO2] Show work please

asked by Angel on April 1, 2011
50. ## Math

You have saved \$130 for a new pair of skis. They have a regular price of \$189. They have been reduced by 30%. There is 13% tax. Do you have enough money to buy the skis? Show your work

asked by Anonymous on January 24, 2019
51. ## algebra

what is x short leg for right triangle when given long leg b is 1/2x +11 when given hypotenuse c is 2x + 1 i put (-1/2x + 11) +(2x + 1) = x and came out with 20 but that did not work out when squared A + b = C. I estimated x/a = 8, then b = 15 and c = 17

asked by ann on April 4, 2012
52. ## algebra ll

from a group of 6 men and 4 women , a committe of 3 is to be selected at random. find p(at least 2 woman)my answer is 1/6 if wrong give right answer and show the work please thank you

asked by Anonymous on October 26, 2008
53. ## Intermediate Algebra

Can anyone help? I have a test and this is the last question I need answered. I'm lost and exhausted! Thanks for any help! Evaluate the logarithmic equation for three values of x that are greater than 1, three values of x that are between 0 and 1, and at

asked by Kris B on June 13, 2010
54. ## Math. Increases

The worlds pop in 1970 is estimated to be 3.7*10^9. The yearly growth rate is approximately 2%. How large would the world's pop be in 1980? Please show work. Thanks :)

asked by Casey on October 13, 2012
55. ## INTEGRAL CALCULUS PLEASE HELP!!!

If F(x)dx=1 from 1 to 25, F(x)dx=4 from 1 to 4, and F(x)dx=9 from 17 to 25, then: 1) What does F(x)dx from 9 to 17=? 2) What does (1F(x)-4)dx from 9 to 17x=? I have no idea how to do this problem and have been on it for hours! The problem is not typed

asked by Sarah on September 5, 2014
56. ## Algebra 1

Simplify using long division. (remember to show all your work.) 3. (72-8x^2+4x^3-36x)/(x-3) 4. (8b^3-6)/(2b-1) simplify the expression, if possible. state the excluded values, if any. 5. 10x^2-25X+15^5x-5 6.2w^2-18^w^2+6w+9

asked by Natalia on January 13, 2017
57. ## Algebra

Use synthetic division to divide the polynomial 2x^3 – 12x – 5 by x + 4, Write the quotient polynomial and the remainder. [Be careful – notice that there is no x2 term.]. Show work.

asked by Breanna on July 22, 2009
58. ## math

Sketch the graphs of f(x) = x^2 and g(x) = 2x. Find a number a between 0 and 2 so that when the region between the graphs of f and g for 0

asked by algebra on December 31, 2012
59. ## physics

A fisherman's scale stretches 2.1 cm when a 2.3-kg fish hangs from it. What will be the frequency of vibration if the fish is pulled down 3.8 cm more and released so that it vibrates up and down? if you answer please show your work.

asked by Anonymous on June 6, 2018
60. ## Algebra

You want to buy 8 books for \$19.68 each, estimate the total cost show your work. I did 19.68 x 8 and got 157.44 then rounded the answer and got 157 am I right? Or The second time I tried I estimated 19.68 and got 20 so then I did 20 x 8 and got 160 Is this

asked by Anonymous on June 5, 2015
61. ## Algebra

Use synthetic division to divide the polynomial 2x^3 – 12x – 5 by x + 4, and write the quotient polynomial and the remainder. [Be careful – notice that there is no x^2 term.] Please Show work.

asked by Shelly on July 21, 2009
62. ## math

There are 6 boys and 8 girls in a group of students. Calculate the number of ways that a president, vice-president and treasurer can be selected. Please show your work.

asked by corey on May 23, 2011
63. ## Chemistry

Can you determine the mass of carbon monxide that is produced when 45.6 grams of methane reacts with 73.2 grams of oxygen gas. Can you please show work in detail please. Thanks

asked by Stacey on March 25, 2010
64. ## Chemistry

determine the mass of carbon monxide that is produced when 45.6 grams of methane reacts with 73.2 grams of oxygen gas. Can you please show work in detail please. Thanks

asked by Stacey on March 25, 2010
65. ## Science

How many calories of heat are necessary to raise the temperature of 200g of ice at -30 degrees celsius to steam at 130 degrees? Show graph and work.

asked by Bob on May 10, 2008
66. ## Chemistry

Element X has three isotopes, ^22X, ^23X, and ^25X. The relative abundances are 60%, 35%, and 5% respectively. What is the average atomic mass foe element X? Show Work Please :)

asked by KahJiah on December 13, 2011
67. ## Chemistry

A recipe calls for 5M of sucrose (C12H22O11) dissolved in 750mL of H2O. Please calculate the total mass (g) of sucrose needed. Show all work.

asked by Melissa on December 4, 2016
68. ## chemistry

If a tank contains 55.2 g of butane, what volume, in liters, of oxygen is needed to burn all the butane at 0.850 atm and 25 degrees Celsius? Need to show work too.

asked by heather on March 19, 2014
69. ## chemistry Ap

How much heat must be added to 50.0g of aluminum metal at 25 degrees C to raise its temperature to 125 degrees C? I have about 20 of these left so if you can do this and work it out and show me how you did it it would be great so I can use it as a guide

asked by mhaidar9108 on February 8, 2008
70. ## Physics

I don't get this problem! Please show work. Thanks!! The de Broglie wavelength of a proton in a particle accelerator is 3.60 x 10^-14 m. Determine the kinetic energy (in joules) of the proton.

asked by Jessie on April 22, 2012
71. ## algebra ll

from a group of 6 men and 4 women , a committe of 3 is to be selected at random. find p(at least 2 woman)my answer is 1/6 if wrong give right answer and show the work please thank you

asked by Anonymous on October 26, 2008
72. ## algebra

Solve the equation x2 + 8x – 2 = 0 using both a. The quadratic formula b. Completing the square Write a paragraph or two comparing and contrasting the two methods. Explain which method you prefer and why. c) Use the accompanying graph to estimate the

asked by carolyn on January 3, 2011
73. ## algebra

1. Solve 3x – 19 = 2 Ax = -17 Bx = -17/3 Cx = 7 Dx = -51 Ex = 20 Fx = 18 2. Solve 4x + 12x = 62 + 4(11) Ax = 7 Bx = 5 Cx = 35 Dx = 64 Ex = 11 Fx = 7/2 3. Solve 8x – 7 = x + 10 Ano solution Bx = 1/3 Cx = 1/10 Dx = 3/7 Ex = 17/7 Fx = 17/9 4. Solve 4(5x

asked by whitney on September 20, 2010
74. ## algebra 2

A electrician charges \$50 for the first half-hour of work and \$30 each hour for additional time. Stoney Point High School budgeted \$200 to repair the refrigeration system. What length of service call with the budget not be exceeded?

asked by Monica on February 21, 2011
75. ## math

Can someone please help me with this word problem!?! I know the answer which is 784 feet. But I have no clue how to solve it. Can someone please show how to solve this problem? The word problem is: The melt in Your Mouth Chocolate Factory is a rectangular

asked by aaron on September 4, 2012
76. ## chem

the following experiment was performed in the laboratory : an excess of solid SrCrO4 is vigorously shaken in water until a saturated solution is obtained. The excess solid is filtrated from the solution and 25.00 ml of the solution is titrated with 0.0115

asked by jack on November 17, 2015
77. ## math calc. asap asap please

the point on the curve is 4y=x^2 nearest to (7,2) is: this is what i did: i solved for y and I know that the there's a tangent line at (x1,y1). so using y-y1=m(x-x1), I found the lines of the tangent and perpendicual lines: slope is derivative so it is

asked by Anonymous on October 23, 2006
78. ## Math Calculus

Economists use production functions to describe how output of a system varies with another variable such as labour or capital. For example, the production function P(L) = 200L + 10L^2 - L^3 goves the output of a system as a function of the number of

asked by Assignment6 on October 21, 2011
79. ## Math (UBC)

Economists use production functions to describe how output of a system varies with another variable such as labour or capital. For example, the production function P(L) = 200L + 10L^2 - L^3 goves the output of a system as a function of the number of

asked by Assignment6 on October 20, 2011
80. ## science

At the annual turtle races, Poindexter, the record holder, is trying to retain his title. As the race begins, Poindexter starts off racing North with a speed of 0.025 m/s. He retains this speed for 0.5 meters at which time he speeds up to 0.10 m/s. He

asked by please help(: on October 22, 2009
81. ## displacement...

At the annual turtle races, Poindexter, the record holder, is trying to retain his title. As the race begins, Poindexter starts off racing North with a speed of 0.025 m/s. He retains this speed for 0.5 meters at which time he speeds up to 0.10 m/s. He

asked by :) on October 22, 2009
82. ## science

At the annual turtle races, Poindexter, the record holder, is trying to retain his title. As the race begins, Poindexter starts off racing North with a speed of 0.025 m/s. He retains this speed for 0.5 meters at which time he speeds up to 0.10 m/s. He

asked by :) on October 22, 2009
83. ## science

At the annual turtle races, Poindexter, the record holder, is trying to retain his title. As the race begins, Poindexter starts off racing North with a speed of 0.025 m/s. He retains this speed for 0.5 meters at which time he speeds up to 0.10 m/s. He

asked by :) on October 21, 2009
84. ## science

At the annual turtle races, Poindexter, the record holder, is trying to retain his title. As the race begins, Poindexter starts off racing North with a speed of 0.025 m/s. He retains this speed for 0.5 meters at which time he speeds up to 0.10 m/s. He

asked by :) on October 21, 2009
85. ## math

Sevnety-eight players entered a single elimination tennis tournament.How many matches were played to determine the overall champ? please help me...and if u get the answer can you explain how you got it with a rule or a pattern

asked by Evelyn on November 16, 2010
86. ## math

Sevnety-eight players entered a single elimination tennis tournament.How many matches were played to determine the overall champ? please help me...and if u get the answer can you explain how you got it with a rule or a pattern

asked by Lesly on November 16, 2010
87. ## math

Sevnety-eight players entered a single elimination tennis tournament.How many matches were played to determine the overall champ? please help me...and if u get the answer can you explain how you got it with a rule or a pattern

asked by Katherine on November 15, 2010
88. ## math

Sevnety-eight players entered a single elimination tennis tournament.How many matches were played to determine the overall champ? please help me...and if u get the answer can you explain how you got it with a rule or a pattern

asked by stephanie on November 18, 2010
89. ## math

Sevnety-eight players entered a single elimination tennis tournament.How many matches were played to determine the overall champ? please help me...and if u get the answer can you explain how you got it with a rule or a pattern

asked by Katherine on November 15, 2010
90. ## math

Sevnety-eight players entered a single elimination tennis tournament.How many matches were played to determine the overall champ? please help me...and if u get the answer can you explain how you got it with a rule or a pattern

asked by Evelyn on November 18, 2010
91. ## math

Sevnety-eight players entered a single elimination tennis tournament.How many matches were played to determine the overall champ? please help me...and if u get the answer can you explain how you got it with a rule or a pattern

asked by Katherine on November 15, 2010
92. ## math

Sevnety-eight players entered a single elimination tennis tournament.How many matches were played to determine the overall champ? please help me...and if u get the answer can you explain how you got it with a rule or a pattern

asked by Evelyn on November 18, 2010
93. ## Chemistry

I am having trouble answering this. please help! Q: Cereol is a newly discovered compound in corn flakes. A biologist suspects that it increases mental ability. She is making a solution to test on rats. First she makes a stock solution. She discovers that

asked by Maddy on March 31, 2012
94. ## Math 116

As you are leaving the community, you notice another new community just down the street. Because you are in the area, you decide to inquire about it. a) The sales representative here tells you they also have two floor plans available, but they only have 30

asked by KiKi on March 21, 2010
95. ## Fin/571

3. Bell Mountain Vineyards is considering updating its current manual accounting system with a high-end electronic system. While the new accounting system would save the company money, the cost of the system continues to decline. The Bell Mountain’s

asked by Michele on December 16, 2013
96. ## math

Ben is to invest \$13 000 for 3 years at 8% p.a with interest paid annually. Find the amount of interest earned by calculating the simple interest for each year separately. I know how to solve this using the normal method, but i don't know how to do it by

asked by help on May 9, 2016
97. ## algebra

Read the article about Body Mass Index (BMI) on page 151 of Elementary and Intermediate Algebra. Use the formula given using pounds and inches for finding the BMI at the end of the first paragraph in order to find the four intervals the article mentions:

asked by Anonymous on February 17, 2013
98. ## programming

Create the logic for a program that calls a method that computes the final price for a sales transaction. The program contains variables that hold the price of an item, the salesperson's commission expressed as a percentage, and the customer discount

asked by Elaine on February 18, 2016
99. ## Chemistry

Preparing solutions a. A solution was prepared by dissolving 5.65 g potassium bromide in 32.67 g water. What is the concentration of this solution in weight percent? b. The solution was poured into a 100 mL volumetric flask and water was added to the mark

asked by Shell on May 19, 2011
100. ## Economics

3. (i) Sleak Teak builds yard furniture using hardwoods and (in a smaller shop) handcrafted knick-knacks from the same sort of wood. The hardwood usage in the two lines of product are Yard Furniture: Y = 2 Ty - .001Ty2 Knick-knacks: Z = 20Tz - .01 Tz 2

asked by Michelle on May 25, 2011