# 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 311
1. ## algebra

Show steps For each function,what is the output of the given input For f(x)=4 x+7,find f(4) Thanks

asked by snow on March 12, 2014
2. ## math

Let f(x)= x^4-4x^3+10 Where are the relative extrema, if they exist? Show all partsof the analysis necessary.

asked by Britney on November 11, 2012
3. ## math (conversions)

show the process of a conversion of 1 furlong/1 fortnight to meters per second

asked by bwhetstone on September 7, 2008
4. ## Math

Could someone show me the formula to convert KM to Light-Years? Thanks for any help you can give me.

asked by Kyle on May 17, 2015
5. ## math

I have 2 problems that I need solved. Can someone please help me? t+36t=0 second problem T^2-7t+12=0 Can you show me the steps please?

asked by barbHELP!!!! on October 8, 2010
6. ## math (differential equation)

show that y sub n=cos(ncos^-1(x)) satisfies the differential equation: (1-x^2)(d^2y/dx^2)-x(dy/dx)+n^2(dy/dx)=0

asked by shoosh on March 3, 2013
7. ## math

What is 461,592 x 308? Show and explain answer

asked by Anonymous on January 29, 2013
8. ## life orientation

show the link between intrapersonal conflict and initiating relationship

asked by lebohang on February 19, 2015
9. ## Math-Direct Variation

can you please show me how to set this up? The variables x and y vary directly. When x is 3, y is 6. Find x when y = 2/3

asked by Lucas on August 12, 2016
10. ## Math

3 DIVIDED BY 562.0 SHOW ALL STEPS LONG DIVISION

asked by Nae on August 5, 2013
11. ## trigonometry

Show that (cosð + cosß)² + (sinð + sinß)² = 4cot(ð-ß/2)

asked by sankalp on June 8, 2016
12. ## geometry

in triangle ABC, PandQ are points on BC such that BQ=CP and AP=AQ.show thatAB=AC

asked by DEE on January 12, 2018
13. ## pre cal

show that 6+6sin X is equivakent to --------- - 7 cos x 6cos x ------------ -7(1- sin x)

asked by colleen on February 16, 2009
14. ## Math

Find the y-intercept of the line whose equation is y=1.3x-0.4 Thank you Could you show me how to do this problem.

asked by Mary Ann on January 7, 2015
15. ## math

find missing denominator of 3\7=15\? to show equivalent fraction

asked by Anonymous on July 22, 2016
16. ## calculus sir damon help me or steve

integrate dx/root(coshx-1) plz show step

asked by dam on May 10, 2016
17. ## life orientation

show the link between intrapersonal conflict and initiating relationship

asked by frengelina on February 22, 2015
18. ## life sciences

do a starch on one of the leaves from both apparatuses A and B.record and show your resluts

asked by zintle on May 23, 2017
19. ## english

does this sentence show antithesis The humor almost always proves painful

asked by leo on May 21, 2015
20. ## calculus help

integrate:dx/(3x^3-5)^3 i don,t know how to use wolframalpha plz show me step....

asked by philip on May 7, 2016
21. ## Math

Show how the Commulatice Property of Addition works using the number 2, 3, and 5.

asked by nelson on September 20, 2011
22. ## Math

Show how the Commutative Property of Addition works using the numbers 2, 3, and 5.

asked by k on September 20, 2011
23. ## English

Can any one show me how to cite a page the correct way for a research paper?

asked by Abe on March 6, 2011
24. ## Algebra

What is the vertex of this equation? y=x^2-6x+4. Please show the steps on how you got the answer so i can understand it better.

asked by Hannah on January 7, 2018
25. ## Linear Algebra

W= [ a , a+b ] (2x2 matrix) [a-b , b ] a, b are element of R Show that W is a Subspace of M22?

asked by Wong on April 12, 2016
26. ## Maths Vector

ABCDEF is a regular hexagon. Show that vecotr AB+AD+FA+EA=3AB

asked by Rabin on March 12, 2016
27. ## pre calculus

find the average rate of change of f(x)=x^3-5x+3: a. from -6 to -3 b. from -1 to 2 c. from 2 to 8 I am so lost, can someone please show me how to do this?

asked by courtney on March 27, 2013
28. ## economic

pls show me the chart for production possibility curve

asked by sarah on November 4, 2011
29. ## Calculas

W= [ a , a+b ] (2x2 matrix) a-b , b a, b are element of R Show that W is a Subspace of M22?

asked by Wong on April 10, 2016
30. ## History

How did people show respect to Castro? Did they bow down to him or say anything when he passed by? Thanks for your help.

asked by Janelle on December 17, 2008
31. ## chemistry

Are the following quantum number combinations allowed? Else show any one way to correct them. a. n = 2, l = 0 m = -1 b. n = 4, l = 3 m = -1 c. n = 1, l = 0 m = 0 d. n = 3, l = 1 m = -2

asked by Brittany on December 2, 2009
32. ## algebra

This is a response to bobpursley's answer of Pr(0) = .3; Pr(1) = 7*.3; Pr(2) = 7*.7. Can you show me how you arrived at the above answers? Also, what does * mean? Thanks.

asked by bree on January 2, 2011
33. ## algebra

Will you please show me how to completely factor this expression 2a^2c^3-14bc^3+32c^3d^2 Thank you very much for your help.

asked by Anneliese on December 22, 2016
34. ## math

How do I draw Base Ten Blocks to show 420?

asked by Miranda on February 8, 2007
35. ## microeconomic

please show me how to calculate price elasticity of demand of \$3.00 increase to \$3.50

asked by susie quick on March 27, 2010
36. ## Probability and Statistics

Hi, I am having a lot of trouble with Normal Distribution. I do online school and this lesson didn't really explain how to exactly complete the following problems. My teacher said that the answers to the problems below were all incorrect. I would greatly

asked by anon on May 17, 2017
37. ## Physics

Please help!!! Physics test!? I have a physics test tomorrow on projectile motion, and I don't feel ready for it. I'm having trouble in the class and I need to ace this test. The problem is I get confused when I get a problem. I don't know how to proceed.

asked by Mike on October 9, 2012
38. ## Chemistry

A 23.596 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is diluted with 79.504 g of water. A 13.803 g aliquot of this solution is then titrated with 0.1098 M HCl. It required 29.02 ml of the HCl solution to reac

asked by Mike on November 14, 2011
39. ## chemistry

A 23.596 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is diluted with 79.504 g of water. A 13.803 g aliquot of this solution is then titrated with 0.1098 M HCl. It required 29.02 ml of the HCl solution to reac

asked by Mike on November 14, 2011
40. ## discrete math

Fill in the blanks: For all sets A and B, if A is in the set of B, then A union B in in the set of B. Proof: Suppose A and B are any sets and A in in the set of B. [we must show that __________] Let x be and element of _______. [we must show that

asked by heidi on April 15, 2011
41. ## math

Aaron Grider buys a home for \$120500. After a 15% downpayment, the rest is financed at 8% interest for 9 years. What equal quarterly payments will be required to amortize this mortgage loan? What is the total amount of interest Aaron will pay on the loan?

asked by cat on November 4, 2015
42. ## Calculus

I have several problems that I don't know how to do. I will post one now and hope that someone can help me. The problem is: A cylinder made of playing dough with dimensions h=10cm, and r=1cm, is being stretched from both ends. (a) If V is the volume of the

asked by Kristal on November 12, 2006
43. ## 11th grade

A flight attendant pulls her 70.0 N flight bag a distance of 263 m along a level airport floor at a constant speed. The force she exerts is 41.0 N at an angle of 52.0° above the horizontal. (a) Find the work she does on the flight bag. (b) Find the work

asked by brittany on April 15, 2010
44. ## science

49. A researcher writes a grant proposal to repeat an experiment that was recently published by another researcher. Which of the following statements best supports the grant proposal? A. Funding this grant proposal will allow this laboratory to continue to

asked by keia on August 19, 2016
45. ## math

If two dice are rolled and their faces noted, find each of the following probabilities: a) the sum of the two dice is 8 b) both dice show even numbers c) the sum of the two dice is 8 OR both dice show even numbers d) the sum of the numbers is 7, given that

asked by Anonymous on October 28, 2016
46. ## CTU

Part IV: You find that a small business loan in the amount of 50,000 is the amount you need to purchase the restaurant location. After researching banks to find the best interest rate, you find that banks for small businesses offer the best interest rate

asked by Johjoh on August 13, 2012
47. ## chemistry

A 1.00-g sample of piperazine hexahydrate is dissolved in enough water to produce 100.0 mL of solution and is titrated with 0.500 M HCl. What is the initial of the solution, before any titrant is added? Piperazine,HN(C4H8)NH, is a diprotic weak base used

asked by shae on March 30, 2011
48. ## Chemistry Equation

In a lab expirement you add copper(II)nitrate to pure zinc. Write a balanced equation for this expirement and predict if a reaction will occur. I THINK Bob Pursley answered this question a day or so ago. Zinc is higher in the activity series than copper;

asked by chrissy on January 6, 2007
49. ## Discrete Math

1. Assume that n is a positive integer. Use the proof by contradiction method to prove: If 7n + 4 is an even integer then n is an even integer. 2. Prove: n is an even integer iff 7n + 4 is an even integer. (Note this is an if and only if (iff) statement.

asked by Math help on February 21, 2008
50. ## Chemistry

Answer the following questions by referring to the Cu-Al phase diagram shown below. (a) What is the lowest temperature at which a liquid can be found in a system of any composition of Cu-Al ? (b) A common alloy composition used in airplanes is 4 at. % Cu -

asked by Odesa on December 11, 2012
51. ## Chemistry

Answer the following questions by referring to the Cu-Al phase diagram shown below. (a) What is the lowest temperature at which a liquid can be found in a system of any composition of Cu-Al ? (b) A common alloy composition used in airplanes is 4 at. % Cu -

asked by Ling on December 13, 2012
52. ## Chemistry

Answer the following questions by referring to the Cu-Al phase diagram shown below. (a) What is the lowest temperature at which a liquid can be found in a system of any composition of Cu-Al ? (b) A common alloy composition used in airplanes is 4 at. % Cu -

asked by Chemgnam Style on December 15, 2012
53. ## pre calculus

use the seven step method to graph the following rational function: f(x)=3x^2+x-4/2x^2-5x a. determine the symmetry of the function. b. find the x and y intercepts. c. find the verticle asymptote d.find the horizontal asymptote e.plot the points between

asked by asia on March 26, 2013
54. ## Chemistry

Oxalic acid, found in the leaves of rhubarb and other plants, is a diprotic acid. H2C2O4 + H2O ↔ H3O+ + HC2O4- Ka1= ? HC2O4- + H2O ↔ H3O+ + C2O42- Ka2 = ? An aqueous solution that is 1.05 M H2C2O4 has pH = 0.67. The free oxalate ion concentration in

asked by Ashley on November 15, 2016
55. ## Chemistry

I had to find the absolute zero from a graph with the following points: Temperature (K) / Volume (mL): 318 4.5 308 4.3 303 4.1 294 4.0 284 3.9 275 3.7 271 3.2 I graphed the points (with the temperature on the y-axis because the lab indicated a vertical

asked by AJ on October 30, 2008
56. ## physics

A mover pushes a couch a distance of 4 m to the top of a ramp into the back of a truck using 500 N of force. A) What is the work input of the mover? B) What is the mover’s power if the task takes 10s? C) If the mass of the couch is 100 kg and the back of

asked by jaslyen on November 6, 2011
57. ## Health

How can tobacco affect the circulatory system? A. Decreases heart rate B. Raises blood pressure C. Softens the arteries D. Causes ulcers How can tobacco affect the body? A. Increases appetite B. Makes teeth whiter C. Slows heart beat D. Causes nausea How

asked by emily on May 8, 2018
58. ## physics

a wheel having diameter 2m starts from rest and accelerates uniformly to an angular velocity of 75 revoulutions per minute in 5s. calculate its angular acceleration? Q;- one of the rectangular components of velocity of 80km/hr find other component? Q:-the

asked by vishal on September 27, 2010
59. ## chemistry

Answer the following questions by referring to the Cu-Al phase diagram shown below. (a) What is the lowest temperature at which a liquid can be found in a system of any composition of Cu-Al? correct (b) A common alloy composition used in airplanes is 4 at.

asked by danhil on December 17, 2012
60. ## n/a

Inter-department Services Step Method : O'brain's Department Store Allocates the Cost of personnel and Payroll to three retail Sales Department Housewares , Clothing and Furniture . In addition to providing services to the operating department. Personnel

asked by Anonymous127 on June 4, 2011
61. ## chemistry

A student needs to make a dilution from a stock solution. The stock solution is 2.) M NaCl. How much should the student use of the 2.0 M NaCl to make 1.0 L of 0.05M NaCl diluted stock.

asked by Marilyn on April 6, 2011
62. ## Please help do by 10:00 Science

1. Convert 4.0 kilometers (km) to meters (m). (1 point) 0.04 m 40 m 400 m 4,000 m 2. For his science project, Austin wants to determine if the pH of standing rainwater changes over time. He collects a jar of rainwater and places it indoors in a spot that

asked by BLOB on September 25, 2016
63. ## social sciences

Consider the following numerical version of the IS-LM model: C = 60 + 0.6Yd I = 150 – 10i YD = Y – T T = 200 G = 250 Real money demand: (M/P)d = (40 + 0.1 Y – 10i)P Real money supply (M/P)s = 80 P = 2 Where Y is output, Yd is disposable income, C is

asked by ismail on April 23, 2009
64. ## health care admin.

what are some assistance plans human resources for a health care administrator should have in the company's strategic plan? The obvious ones (obvious to me, that is!) are ~~medical coverage for the employee, with buy-in possibilities for employee's family

asked by jean on July 27, 2007
65. ## english please revise

The Evolution of Inequality James K. Galbraith, a Government/ Business professor at the University of Texas in Austin, has gathered data and other sources to analyze the evolution of inequality in the world at large. Galbraith in junction with a group of

asked by christi on February 10, 2008
66. ## math

Which strategies can be used to solve this problem? Kathleen invited 28 people to her party. She plans to seat 8 people at the dining room table. She will put the rest at round tables with 4 people at each table. What is the fewest number of round tables

asked by diego on April 12, 2016
67. ## English

REVISED My passion for medical transcription arose because of my love for research and thirst for knowledge after losing my father from stroke complications. I have been curious about new diagnoses, medications, technologies, and new treatment options. As

asked by Evelyn on January 18, 2013
68. ## Corporate Finance

I have answered all of the following except for the payback period, I do not understand how to do it. Can you please explain how to do the payback period? Texas Roks, Inc. is considering a new quarry machine. The costs and revenues associated with the

asked by Miss Patte on October 26, 2015
69. ## math

A company has three sales departments (local, regional, and national) at each of several locations across the United States. Each local sales department has 120 employees. The company wants to survey its employees to determine the most effective sales

asked by Anonymous on April 29, 2019
70. ## statistics

Suppose the method of tree ring dating gave the following dates A.D. for an archaeological excavation site. 1248 1187 1199 1236 1206 1241 1185 1288 1239 Find an 80% confidence interval for the mean of all tree ring dates from this archaeological site.

asked by Anonymous on November 13, 2010
71. ## Biology

I am doing a lab on Dialysis to check if starch moves through the differentially permeable membrane of dialysis tubing.We did this by placing a dialysis tube filled with starch solution into a beaker filled with distilled water and a few drops of iodine. I

asked by Audrina on February 18, 2009
72. ## chemistry

Malic acid is a weak diprotic organic acid with K1 = 4.0x 10-4 and K2 = 9.0 x 10-6. (a) Letting the symbol H2A represent malic acid, write the chemical equations that represent K1 and K2 . Write the chemical equation that represents K] xK2 . (b)

asked by pinky on December 15, 2014
73. ## Chem (but i think its physics)

Ok so this problem appeared in my online chem homework, but it looks alot more like a physics problem. I have no idea how to do it A 203 lb man eats an order of French Fries consuming 250 Cal of food energy. Afterwards he feels guilty and decides to work

asked by D on February 3, 2011
74. ## College Algebra

(I'm so lost with all this algebra so can someone please help me? I have tried to put some answers in so please tell me if any of my answers are wrong and help with the ones left blank). 2. As you are leaving the community, you notice another new community

asked by LeAnn/URGENT on November 16, 2009
75. ## Algebra

(I'm so lost with all this algebra so can someone please help me? I have tried to put some answers in so please tell me if any of my answers are wrong and help with the ones left blank). 2. As you are leaving the community, you notice another new community

asked by LeAnn/Needs turned in within an hour on November 17, 2009
76. ## Physics

For the situation: "A moving crate slides to a halt on a rough surface" Does temperature increase, decrease, or not change? Are work and heat positive, negative, or zero? Does thermal energy increase, decrease, or not change? My answer key says temperature

asked by Courtney on November 16, 2014
77. ## physics

A 10 kg crate is pulled up a rough incline with an initial speed of 1.5 m/s. The pulling force is 100 N parallel to the incline, which makes an angle of 20 degrees with the horizontal. If the coefficient of kinetic friction is .40 and the crate is pulled a

asked by wency siatula on May 3, 2016
78. ## physics

A 10 kg crate is pulled up a rough incline with an initial speed of 1.5 m/s. The pulling force is 100 N parallel to the incline, which makes an angle of 20 degrees with the horizontal. If the coefficient of kinetic friction is .40 and the crate is pulled a

asked by Anonymous on October 22, 2007
79. ## physics

A 10 kg crate is pulled up a rough incline with an initial speed of 1.5 m/s. The pulling force is 100 N parallel to the incline, which makes an angle of 20 degrees with the horizontal. If the coefficient of kinetic friction is .40 and the crate is pulled a

asked by Anonymous on October 23, 2007
80. ## Math: Equivalence Classes

Let R be the relation on ℤ+×ℤ+ defined by (a,b)R(c,d) if and only if a−2d=c−2b. 1. Find an equivalence class that has exactly 271 elements. 2. Is it true that for every positive integer n, there is an equivalence class that contains exactly n

asked by procrastinationEquation on August 14, 2014
81. ## Math!(Need More Help!I did #4,is ti right?)

Directions:Write inequalities for the numbers 3 - 4 below. Do not solve them! Problems: 3.Stacey and Luis volunteer at the local hospital. Stacey worked 4 more hours than Luis, and together they worked more than 28 hours. What is the least number of hours

asked by Erica!!! on June 24, 2007
82. ## Algebra

A sheet metal fabricator makes boxes from sheet of steel. Each sheet of steel has an area of 1500cm2. 6cm squares are cut from each corner and the edges are bent up to form a box with a volume of 3456cm3.What are the dimensions of each box? I was making my

asked by Emily on November 24, 2017
83. ## finance

A company wants to buy a labor-saving piece of equipment. Using the NPV method of capital budgeting, determine the proposal’s appropriateness and economic viability with the following information: • Labor content is 12% of sales, which are annually \$10

asked by liza on November 18, 2010
84. ## Physics

After 35 minutes of jogging, at the 9-km point in a total 10-km race, jogger A is behind the leader and moving at the same speed. What would have to be your accelearation in order to catch up to the finish line? Assuming the leader maintains a constant

asked by George on January 10, 2009
85. ## Math

Hello, I'm not sure how to go about this question. To get to work on the first day, Jose has the following directions. Travel 15 miles due East. Turn right and travel 12 miles due south. Turn right again and travel 10 miles due West. If Jose could travel

asked by JOE on February 6, 2010
86. ## Chemistry

A sample of CuSO4*5H2O was heated to 110 degrees C, where it lost water and gave another hydrate of copper (II) ion that contains 32.50% Cu. A 98.77-mg sample of this new hydrate gave 116.66 mg or barium sulfate precipitate when treated with barium nitrate

asked by Help Please!!!!!! on June 11, 2009
87. ## Chemistry

What is the mole fraction of methyl n-butyrate CH3(Ch2)2COOCH3 in the vapor phase of a solution consisting of? a mixture of methyl n-butyrate and ethyl acetate CH3COOCH2CH3 at 50 Celsius if the total pressure above the solution is 192.5 torr. The vapor

asked by Jude on February 20, 2011
88. ## CHEMISTRY> HELP QUICK! pls

what is the pH of a 2.62x10^-1 M NaNO2 solution? NB the pKa for HCN=9.212 12.13 13.42 1.87 8.29 0.58 and also; what is the pH of a 2.62x10^-1 M HCN solution. NB the pKa forn HCN is 9.212. 4.90 9.21 0.58 11.32 13.42

asked by Lucinda on June 1, 2010
89. ## English

Here is the second part of the school description I need to translate. Some words are unclear and the sentences are too wordy. I need your help to improve them. 1) third branch includes the study of two foreign languages: English and French and addresses

asked by Henry2 on February 6, 2012
90. ## science

Which Windows feature allows you to personalize your computer system? A. My Pictures C. Default Programs B. Control Panel D. Computer

asked by Joanna on August 15, 2012
91. ## science

How does the human body respond to cuts/wounds on the body -- immune system response? What causes the change in the skin?

asked by Irene on October 27, 2010
92. ## CHEMISTRY

At 450oC the value of equilibrium constant for the following system is 6.59 x 10-3. If [NH3] = 1.23 x 10-4 and [H2] = 2.75 x 10-3 at equilibrium, determine the concentration of N2 at that point. N2(g) + 3H2(g)  2NH3(g)

asked by SHIV on April 10, 2014
93. ## math

THIS IS SYSTEM OF EQUATIONS:SUBSTITUTON Y=2X-8 X-Y=2 I KNO THAT U COMBINE SO IT WILL BE X-2X-8=2 WHICH WLL BE 3X-8=2 BUT I DON'T KNO HOW TO FINISH TH REST......CAN SOMEONE HELP ME....... IF DID SOMETHING WRONG PLEASE TELL ME

asked by kris on October 25, 2008
94. ## us history

different labor systems predominated in various regions of british americ. how did the economy of each region help determine its labor system?

asked by Anonymous on September 15, 2010
95. ## Chemistry

In the system A(g) + 2B(g)  2C(g) + 2D(g) H=21 kJ/mol, it is possible to increase the quantity of C by: a) adding a catalyst b) decreasing the [B] c) increasing the pressure d) increasing the temperature - I think it is b ? Am i right?

asked by scilover on May 20, 2013
96. ## health

To protect itself from stress, the nervous system triggers the release of hormones such as adrenaline. A.True B. False I think it is A true

asked by anonymous on January 23, 2012
97. ## 6th grade Science

How can you make an event chain concept map of the different levels of cell organizations from cell to organ system?

asked by Wyeth on November 21, 2010
98. ## physics

Under what conditions is mass conserved? A. Whenever the system is isolated or closed. B. Only when the change is a chemical one. C. Always. D. Only when the change is a physical one. I was thinking A.

asked by anonymous on March 11, 2014
99. ## algebra

Simplify 2/root 3(49) I solved it as 2 root 3(49) over 49. the system that I entered it in says this is incorrect. Help I need to understand how to do this problem with steps. I am so confused. Thanks

asked by sally on March 22, 2013
100. ## college

The economic system of state support of manufacturing and trade, with an emphasis on domestic production for export trade, is known as

asked by staci on June 21, 2009