# 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 529
1. ## Geography

If the town A (longitude 75 W) is 5.00pm on Friday, what will be the time and day at town B(longitude 120 E) show your workings correctly.

asked by Miriam on January 16, 2019
2. ## Math

Suppose that INT{pi to t} g(u)du= e^(cos(t)). Show that INT{0 to t}g(u)du= e^(cos(t))- e. I have no idea how to prove. Tried taking derivative of the result, but didn't think that would help with anything.

asked by Cindy on April 1, 2016
3. ## Math

A clock loses 1/2 minute every hour if it is put right at 6:00am on Sunday what time will it show the following Sunday when the correct time is 7:00 am

4. ## Chemistry

Calculate the pH of a 25 mL sample of distilled water after the addition of 1 mL, 2 mL, 3 mL, 4 mL, and 5 mL of NaOH and HCL. (0.1 M HCl and NaOH) In total, you need to show 10 calculations.

asked by Mariah on March 14, 2011
5. ## Chemistry

I'm confused. What's the difference between a structural formula and a condensed structural formula? Could you show me a website maybe that might outline the differences? Thank you for explaining this.

asked by Aline on May 2, 2009
6. ## physics

A ball is thrown up in the air with an initial speed of V. If the air exerts a constant frictional force F on the ball, show that H = (V^2) / 2(g+F/m)

asked by sandhya on November 21, 2009
7. ## ALGEBRA

Find an equation in slope-intercept form passing through the points (2,5) and (7,-3). M=(-3,-5)/(7,-2) M=-8/5 IS THE SLOPE [Y=MX+B] 5=-8/5*2+B 5=-16/5+B 5+16/5=B (25+16)/5=B 41/5=B THE Y INTERCEPT Y=-8X/5 +41/5 HOW WOULD I SHOW A GRAPH ON THIS PROBLEM?

asked by bianca on February 26, 2011
8. ## math: inequalities

2b < 8 My answer is that b is less than or equal to 3.9. Is that correct? If not, can you explain why it isn't, please? b< or = to 3.9 is correct, but you could just say b

9. ## English 102

IS this a good research question? What stage of childhood development does research show how experiences affect brain development and why?

asked by De on February 28, 2015
10. ## astronomy

Can CMB show that the universe was accelerating at the time the CMB formed thus measuring dark energy early in the universe?

asked by Bella on October 7, 2013
11. ## math

how to graph this y=6x+20 Graph the y-intercept. Show the lines that indicate the use of slope to graph two more points Draw the line representing the graph of the equation

12. ## maths

The length of a Tennis court is 12.8 m more than its width w. What are the dimensions of the Tennis court. Show the formulation of how you arrived at the quadratic expression.

asked by naafd on November 28, 2014
13. ## math

I dontunderstand this question can you please help me. "Explain why 3 separate lines can all be parallel to each other,but 3 separate lines cannot all be perpendicular to each other. Use a drawing to show your answer."

Show the number of partitions of n in which only odd parts may be repeated equals the number of partitions of n in which no part appears more than three times

asked by Anonymous on October 16, 2014
15. ## Geomerty

Find a Counterexample to show that the conjecture is false. Conjecture: Any number that is divisible by 6 is also divisible by 12. A. 36 B. 30 C. 48 D. 60 Im thinking that the answer is B. 30, but i was just making sure.

asked by Court on April 12, 2010
16. ## physics

a projectile thrown at an angle Ө with the horizontal has horizontal range R and maximum height h. show that the tangent of the angle of projection is given by 4h/R

asked by swapnita paras on October 4, 2014
17. ## astronomy

Can CMB show that the universe was accelerating at the time the CMB formed thus measuring dark energy early in the universe?

asked by Bella on October 7, 2013
18. ## science

the basicity of tetraoxosulphate 6 acid is 2 explain the statement with an equation and show the reaction between tetraoxosulphate 6 acid with potassium hydroxide

asked by boss on April 30, 2019

Show mathematically that to produce an image that is the same size as the object in a concave mirror, the object needs to be at twice the focal length from the mirror.

asked by Juniper on November 17, 2008
20. ## cal

Sketch the graph and show all local extrema and inflection points. f(x)= 1/x^2-2x-8 I believe the ans is "Relative max: [1,-1/9]" and No inflection points".

asked by mat on November 21, 2013
21. ## physics

A stone is projected vertically upwards with velocity 40m/show that the stone will reach the point of projection with the same velocity

asked by samod on September 21, 2015
22. ## math

Let f and g be the functions defined by f : R^2 −→ R^2 (x, y) 􏰀−→ (−y, −x) and g : R^2 −→ R^2 (x, y) 􏰀−→ (x + 1, y − 1). (a) Describe the geometric effect of each of f and g (b) Determine the composite function g◦f. (c) Show

asked by s17 on October 29, 2018
23. ## Math

find the derivative of x^3-6x^2+15x+8 and show by completing the square that function has no turning point. I can find derivative but not sure of next step

asked by Leah on March 8, 2016
24. ## Calculus

Consider the function h(x)=e^x. Determine the equation for the tangent line at x = 1. All values must be exact (no decimal values). can someone show me how you'd get to y=ex step by step??

asked by Anonymous on November 21, 2018
25. ## Algebra

Please show me step by step on solving this problem? log₅(2x-9)+ log₅(x+2)= 1 Thank you I'm getting 2x²-5x-28=0 which is a empty set. Trying to make sure I'm correct if I am. Thanks so much for your help

asked by sandy on December 1, 2012
26. ## math

simplify and state any restrictions: 1. x+3/x^2+11x+24 - 2x+10/x^2+11x+30 answer: -x-10/(x+8)(x+6) 2. x-4/x^2-8x+16 + 3x+21/x^2+12x+35 answer: 4x-7/(x-4)(x+5) i don't uderstand how to do it. can you please show me the steps. thanks

asked by bob on September 13, 2014
27. ## sir steve reiny plz maths

Suppose you have 5 real numbers whose sum of squares is equal to 5. What is the maximum value of the sum of cubes of these 5 numbers? Please show step

asked by danu on May 6, 2017
28. ## Physics

Show mathematically that to produce an image that is the same size as the object in a concave mirror, the object needs to be at twice the focal length from the mirror.

asked by Juniper on November 17, 2008
29. ## Integrated Science

cabbage leaves___caterpillar___kisskadee___hawk 1.)what do the arrows in this food chain show? 2.)give the reason why a food chain must begin with a plant. Thanks for all your help.

asked by Kavita on November 22, 2008
30. ## chemistry

Can I get weblinks that show the esterification reaction which produces ethyl formate and the estirificaiton process which produces Ethyl Butyrate?

asked by Johnathan on April 25, 2008
31. ## physics

in low temperature physics,at joule thomson effect hydrogen does not show cooling effect at room temperature why?

asked by karthika on February 23, 2010
32. ## Math

A binary operation * on the set of real numbers is defined by a*b= a+b-ab for a,b, c is belongs to R. i) show that the operation is associative. That is, (a*b)*c=a*(b*c) for all a,b,c belongs to R. ii) Find the value of -5*8 and also the value of

asked by Ilukui on May 2, 2016
33. ## Social Studies (Ms. Sue)

Why did visitors see at world's fairs? My answer: Visitors saw newly inventions and such, as the fairs were designed to show off American technology.

asked by Anonymous on May 26, 2013
34. ## Geometry

The lengths of the sides of a triangle are 3x, 5x – 12, and x + 20. Find the value of x so that the triangle is isosceles. Can somebody show me a step-by-step process of how to get the answer(s) please? I need it:) I also saw that x could = 8, 10, and 6.

asked by SkatingDJ on December 8, 2015
35. ## math

You want to buy three books that are on sale at 20% off. The original prices of the books are \$2.50, \$4.95, and \$6.00. How much will you save? Calculation Without Distribution (Show all steps.) Please help!!! i know how to do it with distribution, but i am

asked by i am dog on November 20, 2017
36. ## life orientation

discuss two examples from the media to show how the media support a democratic society.explain how society has benefit from this articles

asked by Phindy Pwoww on May 29, 2015
37. ## Trigonometry

Can you show steps on deriving the identity from the sum and difference formulas for cosine: sin a sin b = (1 / 2)[cos(a – b) – cos(a + b)]

asked by Tim on May 10, 2015
38. ## chemistry

How do you compare and contrast a chemical equation and an ionic equation? Is a chemical equation any equation while an ionic equation deals with the gain/loss of electrons? A chemical equation usually consists of what I call a molecular equation whereas

asked by Carter on December 15, 2006
39. ## physics

One method for measuring the speed of sound uses standing waves. A cylindrical tube is open at both ends, and one end admits sound from a tuning fork. A movable plunger is inserted into the other end at a distance L from the end of the tube where the

asked by cole on February 13, 2018

One method for measuring the speed of sound uses standing waves. A cylindrical tube is open at both ends, and one end admits sound from a tuning fork. A movable plunger is inserted into the other end at a distance L from the end of the tube where the

asked by chelsea on May 1, 2012
41. ## Calculus

For y=(1/4)x^4-(2/3)x^3+(1/2)x^2-3, find the exact intervals on which the function is a. increasing b. decreasing c. concave up d. concave down Then find any e. local extreme values f. inflection points --- I thought it'd be better to find extreme values

asked by Anonymous on June 1, 2010
42. ## World History

How did pachacuti the sapi inca dominate an immense empire from his small kingdom in cuzco? A. His army had better weapons and received intense training B. People in the region thought he was the embodiment of the god zeus C. After he had subdued

asked by sarah on January 9, 2012

A light spring of constant k = 170 N/m rests vertically on the bottom of a large beaker of water. A 5.70 kg block of wood (density = 650 kg/m3) is connected to the spring and the mass-spring system is allowed to come to static equilibrium. What is the

asked by julie on December 20, 2010
44. ## english

Please check grammar correctint comma splice sentences and need to use more the 1 method. Original sentence: Unfortunately Anthony did not live to see the 1920 passage of the Nineteenth Amendment giving women the right to vote,she died in 1906. My

asked by Amor on April 29, 2011
45. ## Science

How are the respiratory and circulatory and respiratory systems similar? A) Both systems provide glucose and other substances to cells. B) Both systems regulate blood flow throughout the body. C) Both systems help remove carbon dioxide from the body. D)

asked by Julie on March 30, 2018
46. ## can someone edit my essay? thanks!

Gorbachev did not think about all the consequences that would happened if he changed Russia into perestroika. He underestimated the effect that perestroika would have on Russia. Yes, his political initiatives were great for freedom and democracy but all

asked by henrey on April 25, 2007
47. ## Physics - Torque

A particle is acted on by two torques about the origin: T1 has a magnitude of 4.3 N*m and is directed in the positive direction of the x axis, and T2 has a magnitude of 3.2 N*m and is directed in the negative direction of the y axis. What are the magnitude

asked by COFFEE on March 31, 2007
48. ## English-Ms. Sue

Ms. Sue, you know the paragraph I did yesterday right, well I just want to change the the starting/introduction. I want to make it sound more interesting. I don't know if what I wrote makes sense(in the beginning) Could you show me another way to put it

asked by Sara on February 10, 2010

Mahalyk's Water Fun Shoppe specializes in jet skis. Mahalyk's inventory records showed the following for the past year. Purchase Date Number of Jet Skis Cost Per Jet Ski February 10 30 \$4,000 May 12 80 \$3,000 June 15 20 \$3,500 July 20 15 \$2,500 Use the

asked by Anna on February 13, 2013
50. ## Accounting

Hi, I am having trouble figuring out the below question. Can someone please provide some guidance. Thanks! _____________________________________ It’s December 31, 2007 and you are about to close the firm’s books for the year. Just as you think

asked by Leslie on February 23, 2009
51. ## Theories and issues in working with school-age chi

Voters have been historically unwilling to underwrite a school-age child care system because A. recently immigrated families had more extended support and could take care of their children themselves. B. they believed that child care was the responsibility

asked by Amanda on October 24, 2014
52. ## chemistry

true or false Entropy always tend to favor mixing Mixing result in positive change in entropy Entropy allows endothermic processes to be spontaneous Pure liquids don't have entropy Addition of salt to water increases entropy Entropy is the measure of

asked by Jazz on May 6, 2015
53. ## biology

Genetic problem Schilder's disease, which causes a progressive degeneration of the nervous system leading to death at about two years of age, behaves as a simple autosomal recessive trait. If a couple loses their first two children due to Schilder's

asked by deb on March 15, 2008
54. ## Physics Energy and Work Done

A 390-N child is in a swing that is attached to a pair of ropes 1.9 m long. Find the gravitational potential energy (in JOULES) of the child–Earth system relative to the child's lowest position at the following times. A) when the ropes are horizontal B)

asked by Mofied on November 1, 2011
55. ## statistics

A researcher wishes to estimate the proportion of college students who cheat on exams. A poll of 490 college students showed that 33% of them had, or intended to, cheat on examinations. Find the margin of error for the 95% confidence interval. solution I

56. ## science

Hi I have 2 questions I hope someone can help me :) 1)A pocket of gas is discovered in a deep drilling operation. The gas has a temperature of 480c and is at a pressure of 12.8 atm. What volume of gas is required to provide 18.0 L of gas at the surface

asked by lindsay on March 25, 2007
57. ## HR management

Susan Moore is the number manager in charge of a 25-bed medical unit at St. Eligius Hospital. She is currently preparing the nurse staffing plan for the next fiscal year. Hospital management has provided all nurse managers with a list of assumptions for

asked by Anonymous on September 21, 2014
58. ## can some pleas edit my essay? thanks!

A revolution is an overthrow of the government or politic system by the people who they govern. Violence is an act of aggression and anger. Violence is never the way for justice; but according to a reactionary violence is the way. They argue violent

asked by Post a New Question on May 2, 2007
59. ## CHEMISTRY

Mass (before reaction): test tube + HCl(aq) + stir bar + capsule 26.600 g Mass (after reaction): test tube + HCl(aq) + stir bar + capsule 25.300 g Volume of water displaced from the squirt bottle 148 mL Temperature of the CO2(g) 287.4 K Pressure (atm)

asked by Karina on October 22, 2012
60. ## Science - 7th grade

Can you check the following: 1. Draw a Punnett Square to show a dog breeder inbreeding to maintain a purebred line of golden retrievers. Ans: would the parental cross look like Gg x GG or GG x GG? 2. Draw a Punnett Square to show a farmer crossing a plant

asked by Alexis on February 15, 2015
61. ## Calculus

Can someone check my work on this problem? I'm studying for the AP test and I would really appreciate any help. Let f(x) = the definite integral from [-2,(x^2-3x)] of e^(t^2) dt At what value of x is f(x) a minimum? a. For no value of x b. 1/2 c. 3/2 d. 2

asked by ashley on April 28, 2015
62. ## Word problem

37 men each do 7hours 35min work in a day,per what total working time in a week per six days,dose their employer have to pay wages????

asked by Collins on September 30, 2015
63. ## Social Studies

how are interest rates and wages similar? A. both rise due to inflation B. both are types of prices. C. both relate to the cost borrowing D. both are payment for work done i think B

asked by chris on September 15, 2014
64. ## precalculus

graphing y=sin(x-pie/4) what are the first 5 x values of the graph ? We will get to you when the person comes online, please be patient, and ry to do soe work on your own, just don't ask for every single answer! :) try to do it by yourself ;) ~Ms.Sue~ :)

asked by lisa on November 13, 2006
65. ## Civics

What is a congressional fact-finding trip known as? Fill in the missing blank. In both the House and the Senate -------- do the detailed, daily work of considering proposed legislation?

asked by Anonymous on September 14, 2009
66. ## critical thinking

Which of the following is not a way to succeed in college? A. Be flexible with planning activities B. avoid procrastination C. establish realistic goals for yourself D. organize a work space my answer is b.

67. ## Physics

A bullet of mass 200 grams is forced with work speed of 400 m/s of it is stopped in 100 m, Find: a.) KE b.) Force needed to stop it

asked by Chantal on April 27, 2016
68. ## physics

Express the following measurements as indicated. A. 6.20 mg in kilograms B. 3X10^-9 s in milliseconds C. 88.0 km in meters A. 6.20mg (1g/1000mg)(1kg/1000g) You do the rest. I will be happy to critique your work.

asked by Anonymous on August 22, 2006
69. ## science

I did the work for this lab but forgot to record the data. It was a double displacement of CuSO4 and NaCO3. If someone could help me with the visual reaction that would help me out a lot. I know what to do I just don't remember what happens.

asked by Teegan on October 19, 2014
70. ## Biology

I was wondering if you could double check my work thanks! Kidneys play a major homeostatic role in regulating body fluids. Which would not be a reasonable inference? A.

asked by Nelson on March 13, 2007
71. ## mass communication

who is target audience of sex and the city? Please note that we don't do students' homework for them. Once YOU have come up with a response to YOUR questions, please re-post and let us know what you think. Then someone here will be happy to critique your

asked by Fran on March 23, 2007
72. ## history

do you know any website that tells us anything about the ancient greek's landscapes? Already answered -- above. =) I'm sorry. But I'm a different person then LP. :D Your IP address is identical to LP's, so you're either in the same house or the same school

asked by eunice on May 18, 2007
73. ## grammar

Could you check my sentences. Thank you very much 1. They used to work that she would forget them when she got famous. 2. She used to tell them that would never happen. 3. She would always call, and go to see them when she was in town. 4. They would thing

asked by Flabio on September 14, 2017
74. ## physics

A bucket filled with water weighing 50kg is raised from a well of depth 100m.if the linear density of the rope is 1kg per metre.then the work done is

asked by Thousif on September 22, 2017
75. ## literature

I need help developing a thesis statement for an analytical essay on Oedipus Rex and A Raisin in the Sun. I have to compare and contrast these two pieces of literary work. Can someone please help me?

asked by Robin on July 23, 2009
76. ## Chemistry

Calculates the work done (in joules) when 42.8 g of tin dissolves in excess acid at 1.10 atm and 23 degrees Celcius. Assume ideal gas behaviour.

asked by Vanessa on September 19, 2013
77. ## Healthcare Management

In a _______ study, work is divided into its most fundamental elements, which are studied separately and in relation to one another. A. classic B. therblig C. time D. motion I choose C

asked by Anonymous on September 16, 2017
78. ## physics

a particle of mass 1 gram is rotated in a horizontal circle of radius 1 meter.it moves with a velocity 2 meters per second in magnitude the work done in 1 revolution is?

asked by Anonymous on February 6, 2011
79. ## english

you've applied foa specific job in your field of study. the human resource ARRANGE A INTERVIEW AND TELL YOU BRING YOUR POLISHE PIECE OF WORK

asked by willie on May 17, 2012
80. ## Social Studies

how are interest rates and wages similar? A. both rise due to inflation B. both are types of prices. C. both relate to the cost borrowing D. both are payment for work done i think B

asked by chris on September 15, 2014
81. ## World history

Which of the following most likely led Anna Comnena to become a historian ? A. her historical education B. her split with her family C. her life in a convent D. her husband's unfinished work My answer is .. D?

asked by ciara on May 21, 2012
82. ## Math

The area of one of the faces of the cube below is x^2+2x+1 cm^2. Find an expression in mixed radical form for the length of the interior design. Since no one looked at my previous work.................

asked by Angel on November 16, 2016
83. ## Algebra

Evaluate the given function for the value specified. 2. f(x) = x squared - 7x + 10; find (a) f(0), (b) f(5), and (c) f(-2). a) f(0)=> b) f(5)=> c) f(-2)=> I didn't see your work, so it's hard to critique it. Take the 0, 5, and -2 and plug it in for "x" in

asked by Linda on May 27, 2007
84. ## math

stamjps are sold in bookiets of 100,50, and 10.find as many different ways to buy 200 stamps as you can. record your work in the chart. I don't understan what to do here. help

asked by ann on September 17, 2014
85. ## Science

A __________ is a rule that describes the behavuor of something in nature usually without explaining why the behavior occurs Please help and quick! That's two freebies. Give us your feedback on the others and someone will review your work.

asked by jake on September 28, 2006
86. ## Vectors

How much work is done by the orderly pushing a 85 kg person up a 5 m ramp inclined at an angle of 15° to the horizontal? I did W = (85)(9.8)(5)cos15, but to get the correct answer you are supposed to use (85)(9.8)(5)sin15 instead. Why do we have to use

asked by Holly on June 7, 2018
87. ## pyscology

'when Mary is late coming home from work,john decides that it is because she lost interst in their relationship.this situation illustrates the blank effect'

asked by suzanne on December 31, 2015
88. ## Social Studies 7th Grade

Check my work please! Although India ahs only 16 official languages, people there speak more than ________ language. 1.30 2.50 3.100 4.800 I belive the answer is 1.

asked by Help! on December 13, 2016
89. ## physics

A plane designed for vertical takeoff has a mass of 51 kg. Find the net work Wnet as it accelerates upward at 1 m/s2 through a distance of 34 m after starting from rest.

asked by anna on December 8, 2010
90. ## English

An epic is a narrative or poetic literary work that tells of A.) the traditions of an ancient culture. B.) the adventures of a legendary here. C.) the history and myths of a country. I think it is B..?

asked by Cassie on January 9, 2014
91. ## History

Efficiency was a central theme of the reform movement. Who of the following was not an example of someone striving to examine every aspect of life itself and determine, often through new scientific principles, how to do more work with less energy?

asked by Stephanie on October 14, 2014
92. ## math

stamjps are sold in bookiets of 100,50, and 10.find as many different ways to buy 200 stamps as you can. record your work in the chart. could you give me some examples...please!

asked by ann on September 18, 2014
93. ## math

a student who weighs 500 newtons climbed the stairs frim the first fkoor to the third floor 15 meters above in 20 second How much work did she do? what was her power? How do you write this question out HELP

asked by gary on October 25, 2009
94. ## Algebra

Electrician charged \$50 a house call and \$65 dollar an hour. The job is 6 hours long Will it be cheaper for him to work 6hrs or 2 3hour jobs?

asked by Judy on November 14, 2016
95. ## physics

(a) A truck of mass 1870 kg travelling at 80 km/h braked to 55 km/h then continued at that speed. How much work was done by the brakes during that period? I just wanted to check my answer... 243334 J ??

asked by shoushanik on October 1, 2014
96. ## drawing

Does anyone know for the work titled Blind MAn by William H. Johnson know what materials he used would it by tempura and printing paper? Also Does the artist use symmetrical or asymmetrical balance?

asked by Jennifer on April 22, 2011
97. ## Geometry

I need to write a paper about M. C. Escher, what he did, and how he became inspired to do tessellations and make that the focus of his work. Whatever you give me is fine as long as it's helpful, a link would be great.

asked by Zoella on December 18, 2016
98. ## Physics

(a) A truck of mass 1870 kg travelling at 80 km/h braked to 55 km/h then continued at that speed. How much work was done by the brakes during that period? I just wanted to check my answer... 243334 J ??

asked by Jeannine on October 1, 2014
99. ## ap chemistry

A sample of gas in a cylinder of volume 4.09 L at 289 K and 3.43 atm expands to 7.73 L by two different pathways. Path A is an isothermal, reversible expansion. Calculate the work

asked by cheri on October 31, 2012
100. ## Algebra II

Factor out: 64x^3 + 1 It is a binomial times a trinomial (4x+1)(16x^2-4x+1) should work. Check my math again! [8x^(3/2) - i][8x^(3/2) + i] Although my previous answer works (if i = sqrt-1), Taasha's is what you are looking for.

asked by Juri on August 4, 2007