# 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 480
1. ## statistics

Prep Courses? Scores for men (nationwide) on the verbal portion of the SAT test are normally distributed with a mean of 509 and a standard deviation of 112. Randomly selected men are given the Columbia review course before taking the SAT test. After the

asked by STatistic on June 28, 2010
2. ## Math

The owner of a large company is conducting a survey about job satisfaction, including questions about salary, hours, stress, and other conditions. There are about 800 employees in the company, including 100 executive positions, 650 middle-management

asked by Fatima on August 7, 2012
3. ## Microbiology

How would you disinfectant a plastic chair surface contaminated with blood in the hospital? (Please note in detail the steps required for personal protection, initial clean-up, follow-up disinfection, and the disposal methods of contaminated items.) a.

asked by Rose on September 26, 2014
4. ## Microbiology

How would you disinfectant a plastic chair surface contaminated with blood in the hospital? (Please note in detail the steps required for personal protection, initial clean-up, follow-up disinfection, and the disposal methods of contaminated items) a.

asked by Rose on September 26, 2014
5. ## systems analysis design

Task: Draw an ERD that shows cardinality relationships among the entities. When you create your ERD, you'll need to consider the training courses, trainers, corporate clients, students, test results, class schedules, and probably a few more. You'll find it

asked by lacour on November 24, 2008
6. ## STATISTIC(STANDARD DEVIATION, PLS HELP)

The production of batteries manufacturing department of a company is monitored weekly.100 such batteries have to be produced each week before being tested by putting them into toys and seeing how long they last.The results of 20 tests are shown below: 31

asked by pallavi on March 15, 2012
7. ## Calculus

The tank shown is full of water. Given that water weighs 62.5 lb/ft3, find the work required to pump the water out of the tank. The tank shown is a hemisphere with r = 5 ft. The water is to be pumped out at the top. First I solved for ri, ri / (5 - xi) = 5

asked by COFFEE on June 22, 2007
8. ## chemistry

strontium chloride can be obtained as the anhydrous salt, SrCl2, and as the hydrates SrCl2.2H20, and SrCl2.6H20. (ArSr = 87.5). 0.323 g of a sample of strontium chloride is dissolved in water and reacted with sliver nitrate solution. The mass of sliver

asked by kate on March 17, 2007
9. ## science(physics)

A car goes from a dead stop to 25m/s in 5s going east. It keeps going then slows down after it reaches 60m/s. It is being drived on level ground. For the first 5s the magnitude of the velocity vector increases at a constant rate. What is the Instantaneous

asked by ~christina~ on August 1, 2007
10. ## math,help

how do i find the following: is there a formula for this? Problem #15 Find the constant term that should be added to make the following expression a perfect square trinomial. x^2+7x square a few binomials and see if you can see a pattern e.g. (x+3)^2 = x^2

asked by jasmine20 on April 15, 2007
11. ## Math

1. The ratio of the number of dimes to the number of pennies in a purse is 3 to 4. If 3 pennies are taken out of the purse, the number of dimes and the number of pennies in the purse will be equal. How many dimes are in the purse? (Answer key says 9- and

asked by Wendy on February 9, 2015
12. ## Language Arts

I began a written correspondence with my grandmother when I was a young child. We did not live within visiting distance, and writing was a way for us to “visit” each week. Sunday was the day she would rest from her labors on the farm. Taking her dime

asked by Anonymous on December 7, 2016
13. ## stats

On the eleventh day of Statistics, my teacher gave to me… eleven pipers piping. While these popular pipers are on tour piping, one piper is randomly selected to win tickets for his immediate family to the show. The breakdown of the number of tickets

asked by please help on December 31, 2015
14. ## english

What does Tammy’s family build every Halloween? a haunted house a maze of pumpkins an obstacle course a hay maze What main problem does Tammy’s family have? Their Halloween maze doesn’t have good pumpkins. The Little Acres Farm cannot compete with

asked by gaaaa on March 6, 2019
15. ## us history

What is the significance of Alexander Hamilton’s financial program? · How did Hamilton’s financial program play a role in the creation of a two-party political system?

asked by Kendra on July 28, 2011
16. ## Chemistry

A piece of iron (Cp = 0.450 J/(gi°C)) that has a mass of 21.5 g and an initial temperature of 100.0°C is submerged in X g of water (Cp = 4.184 J/(gi°C)) at 20.0°C. The temperature of the system (iron and water) changes to 21.4°C. What is the value of

asked by Jess on February 22, 2015
17. ## algebra 1

Material cost equation : 30x + 2y = 200 Profit equation : 100x + 5y = 400 B. Explain your inequalities and explain why x

asked by malik on November 22, 2013
18. ## physics

A 47 N box is pulled along a frictionless horizontal surface by a 25 N weight hanging from a cord on a frictionless pulley? What is the acceleration of the system (box and the weight)?

asked by dw about it on December 1, 2011
19. ## chem

I have to find the effective pH range of a buffer. I read that this optimal buffering occurs when the pH is within 1 pH unit from the pK value for the buffering system. But can anyone explain why its is optimal within 1 pH unit? Thanks.

asked by ian on January 28, 2012
20. ## physics

Consider the Hamiltonian H=Z⊗3 acting on 3 qubits. What is the ground energy of the system? (I.e. the lowest eigenvalue of H?) What is the dimension of the ground energy subspace? (I.e. multiplicity of that eigenvalue?)

asked by manu on October 13, 2013
21. ## chemistry

A piece of iron (Cp = 0.450 J/(gi°C)) that has a mass of 21.5 g and an initial temperature of 100.0°C is submerged in X g of water (Cp = 4.184 J/(gi°C)) at 20.0°C. The temperature of the system (iron and water) changes to 21.4°C. What is the value of

asked by ken on July 7, 2015
22. ## Chemistry

What is the relationship between the equilibrium and changes of state? You need to be a little more specific. For liquids, for example, in a closed system, the vapor pressure of the liquid reaches equilibrium between the vapor and the liquid.

asked by N/A on April 15, 2007
23. ## Physics

Two objects are moving in the xy-plane. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. What is the total momentum of the system? (should I

asked by Carl on November 9, 2014
24. ## Physics

I gues I'm looking at this the wrong way i do not understand the work you do to get to the answer Question: Find the air velocity of a plane that must have a realtive ground velocity of 250.0 h^-1 km norht if it encounters a wind pushing it toward the

asked by Physics on September 18, 2009
25. ## Math

Orin has driven 150 miles in the past 8 hours write an algebraic expression to show how many miles are in drove each hour

asked by Anonymous on December 13, 2016
26. ## math

find the three cuberoots of 8( cos 264 + jsin 264) and state which is the principal cuberoot. Show all three roots on an argand diagram.

asked by stella on July 29, 2013
27. ## maths

(a) Let u=7^x. Using the rules for powers show that i) 7^x-1 = u/7 and ii) 7^2x-1 = u^2/7 (b) By making the substitution u=7^x and using part (a), derive a hidden quadratic equation 7^2x-1 +4×7^x-1 - 1/14 = 0 and hence find all solutions to the above

asked by Michael on October 25, 2016
28. ## Need Math Help Please

in probability why are tree diagrams more useful than to use tables ?? please explain to me in a paragraph so i understand completely and could you please show me an example where i would have to use the tree diagram, and why i couldn't use a table???

asked by Annie on March 20, 2014
29. ## Accounting

I have to prepare an income statement from the following records. Can someone show me how? The following selected information is taken from the records of Beckstrom Corporation. Accounts payable . . . . . . . . . . . . . . . . . . . . . . . . \$ 35,000

asked by Ana on January 20, 2007
30. ## chemistry ............chemistry

if you had to design a firework show for a Christmas celebration , what elements would you include in the fireworks ? why ? I knew u post answer for me , but i can't find it . May you answer for me? Thank you so much !!

asked by Maria on October 15, 2012
31. ## Physics

How much can be lifted using 2kg of effort using a jack screw with a 45cm handle and a 1/3 cm screw pitch? Please show me the formula and how you broke down the equation

asked by Logan on August 17, 2018
32. ## Math

The total area of three flowerbeds is 8 13/20m². Calculate how much of the garden remains if the whole garden covers 10 squared meters. Please show the working!

asked by Kathleen on September 26, 2010
33. ## trig

1. The sides of a triangle, in centimetres, are given by 3n-4, 3n+9, 4n+5. Draw a diagram to show the information. If the perimeter of the triangle is 114 cm, find the length of each side.

asked by majid on December 11, 2014
34. ## Astronomy

Given the random orientation of planetary orbits relative to our line of sight, do you expect most or only a minority of all planetary systems to show transits?

asked by g on November 24, 2014
35. ## english

'Agape is the highest form of love' Give two arguments with counter arguments to show you have considered more that one point of view. I need help ASAP

asked by lucy on November 9, 2016
36. ## Physic II

A flat 1.0 m2 surface is vertical at x = 2.0 m and parallel to the yz-plane. What is the flux through the surface if it is located in a uniform electric field given by E = 25.0i + 42.0j + 62.0k N/C? Please show explanation

asked by Johnathan on February 2, 2014
37. ## math

A plane travels at a rate of 425 miles per hour. Write an expression to show the distance it travels, if t represents hours.

asked by deborah on November 9, 2016
38. ## Math

Write an algorithm to evaluate the average height in class. Get the lengths of the class from the user. Trace your program and show your results.

asked by Anonymous on September 4, 2016
39. ## math

9c^5d^8 * 4c^5d^8 __________________ 2c^5d^5 the answer i got is 18d^21c^15 is this anywhere close to being right? :) pls show how you get the answer if its different! :) thx Is this problem division, or multiplication? Either way, it is wrong.

asked by marley on July 2, 2007
40. ## Chemistry

what volume of 0.120 M NaOH must be added to 100 ml of 0.100 M NaHC2O4 to reach ph of 4.70? The answer is 60 ml but I don't know how to find it. Can you please show me the steps and how to do it please

asked by Steve on February 18, 2016
41. ## math

The total area of three flowerbeds is 8 13/20m². Calculate how much of the garden remains if the whole garden covers 10 squared meters. Please show the working.

asked by Kathleen on September 26, 2010
42. ## chemistry

If 5.40 kcal of heat is added to 1.00 kg of ice at 0⁰C, how much liquid water at 0⁰C is produced? Show all calculations leading to an answer.

asked by allexelle on April 6, 2015
43. ## Math

Could someone please explain this problem to me? I will show you what I have so far. Perform the indicated operations and simplify. w-2/w-7-w+1/w+7+w-77/w^2-49 I made it to this step and now I can't figure out what to do next. w^2+w-14/(w+7)(w-7) +

asked by B.B. on May 6, 2010
44. ## Math

A cylinder has volume of 339.3cm^3 and height of 3cm. What is the radius? Please help! Can you show me the formula to use and the steps involved in getting the answer? Thank you for your time.

asked by Cherie on September 24, 2014
45. ## Physical Science

After a sled has passed several times over a snowy path on a hill, the grass or dirt under the snow may begin to show through where the sled has traveled. Why?

asked by Patrice on October 11, 2012
46. ## Creative Writing

I need helps with finding the mood for this: Your school needs more money for basic supplies. I kind of have to "beef" that sentence up to show the mood better, but I don't know how to do that. HELP?!?!

asked by Gabbi on December 15, 2010
47. ## analytical geometry

if (l1,m1,n1),(l2,m2,n2),(l3,m3,n3) are the direction cosines of three mutual perpendicular lines,show that the line whose direction ratios area l1+l2+l3,m1+m2+m3,n1+n2+n3 make equal angles with them

asked by manjula on January 15, 2013
48. ## As physics

(As physics working out please) Which physical quantity has the same base units as energy? SHOW ALL WORKING OUT! A:Moment B:Momentum C:force D:pressure

asked by cylinder on November 7, 2017
49. ## Statistics

This is the remaining part of Jackie's question:randomly selected adults. Show the formula that you will use and then calculate the mean age. Answer: Formula: mean = Mean:

asked by Jackie on October 22, 2009
50. ## math

Show how to divide 2 3/4 rectangular candy bars so that the three friends may share them equally. What fractional part of the candy bar will they receive ??

asked by marie belein on October 6, 2011
51. ## Math Help

in probability why are tree diagrams more useful than to use tables ?? please explain to me in a paragraph so i understand completely and could you please show me an example where i would have to use the tree diagram, and why i couldn't use a table???

asked by Annie on March 20, 2014
52. ## Linear Inequality + graphing?

don't quite understand how to go about finding the answer to this problem. I have to find two different points for a line, graph it, and also above or below the line to show the relationship. How do I go about doing this? The equation is: 3y-8x >24

asked by Laura on March 21, 2011
53. ## geometry

1. The sides of a triangle, in centimetres, are given by 3n-4, 3n+9, 4n+5. Draw a diagram to show the information. If the perimeter of the triangle is 114 cm, find the length of each side.

asked by majid on December 11, 2014
54. ## Microeconomics

Electric utillities often practice second-degree price discrimination. Explain and show diagrammatically why the practice might improve consumer welfare.

asked by Juilet on February 18, 2007
55. ## Geography Help??

show how society and family life compare and contrast in the Pacific Rim? I don't need an answer, just an explanation please. I don't know what that means..

asked by Lauren on April 29, 2012
56. ## English

That is New York Theater. The title of today's movie is E.T. There are 5 show times. The first showtime is 11 a.m. ----------------------- Are the expressions above all grammatical? If there are any wrong expressions, correct them,please.

asked by John on September 22, 2008
57. ## chemistry

Help!! Can someone please show me how to set up this problem. I'm lost. C3H8+5O2-->3CO2+4H20 If 19.2g of C3H8 and 19.2g O2 react, how many moles of CO2 can be produced?

asked by josh on November 5, 2010
58. ## analytical geometry

if (l1,m1,n1),(l2,m2,n2),(l3,m3,n3) are the direction cosines of three mutual perpendicular lines,show that the line whose direction ratios area l1+l2+l3,m1+m2+m3,n1+n2+n3 make equal angles with them

asked by manjula on January 16, 2013
59. ## programming

Show how you would read the status of 100 students and then print the total number of students who are married, single, widowed, divorced.

asked by Anonymous on September 9, 2013
60. ## Math

222x9 in distributive property format i got the answer its just i have to figure out how to show how i got. For example i was able to get 56x4+224 by doing (50x4)+(6x4) then 200+24=224.PLEASE HELP

asked by JimCarrey2JohnnyDepp on September 18, 2011
61. ## 5th grade math

What fraction of a dollar is shown by coins (2 quarters, 1 dime, and 5 nickels)? I got 80/100 equals 8/10. Is 8/10 the correct answer? If not can you show me how to get the right answer?

asked by leon on December 15, 2013
62. ## English

Obviously, the police will use force if you do not cooperate. Is this grammatically correct? I need to write a sentence to show how a comma should be used after introductory words or groups of words.

asked by Molly on July 1, 2010
63. ## math

A plane travels at a rate of 425 miles per hour. Write an expression to show the distance it travels, if t reprents hours.

asked by Nick on January 19, 2011
64. ## calculus

when working with composite functions, does fog=gof? how do i create two functions,f(x) and g(x) to show that this statement is either true or false.i need to explain my reasoning

asked by ayotal on October 19, 2011
65. ## Math

Can you show or help me with this problem: Aquaman drinks 48 ounces of water a day. How many pints of water is that a week? I know that 1 Cup=8oz and 1 pt=2 cups. What do I do?

asked by Mark on January 25, 2016
66. ## Math

Here is the question: Choose a nonzero integer for n to show that -n can be evaluated as a positive number. Here is my answer: If n=-2 then -n=-(-2)=2 Two negatives make a positive. Is this correct.

asked by B.B. on June 30, 2009
67. ## chemistry

If 5.40 kcal of heat is added to 1.00 kg of water at 100⁰C, how much steam at 100⁰C is produced? Show all calculations leading to an answer. I can't figure this one out, can someone help me? Thank you!

asked by louren on March 31, 2016
68. ## Pre calc quadratic stuff

Write function about area of rectangle. Height is x+2 and length is 20-2x. Show that fubction fits the definition of a quadratix function. Thenx ;)

asked by Gucci\$harma on March 9, 2016
69. ## Math

Working with Equilateral Triangles Problem 1: In a paragraph proof format, show why the angles of an equilateral triangle must measure 60 degrees.

asked by Anonymous on September 9, 2017
70. ## main ideas study unit

regural aerobucexecise give an individual more endurance is a sentence that show cause and effect .which word indicates the cause a-regular b-exercise c-individual dendurance

asked by nicole on January 12, 2011
71. ## English: Showing Possession

In my English composition, I wrote the phrase "... my sister and I's favorite CD ..." According to my word processor's spell check there should not be an 's after I. Can 's be used after I? If not how would I show possession in the above phrase?

asked by Anonymous on August 28, 2014
72. ## science

Two forces P and Q whose resultant is 10Newton are at right angles to each other. If P makes 30 degrees with resultant.Show me the workings of the magnitude of Q in Newton and the diagram of the vectors.

asked by Anonymous on June 8, 2015
73. ## Mechanics

Show that theoritically the period of rotation of a satelite which circle a planet at negligible distance from its surface depend only on the density of the planet

asked by Och on January 17, 2016
74. ## World History

Short answer describing the cold war, including examples that show how the war influenced events in the postwar perioc.

asked by Cody on September 13, 2007
75. ## trignometry

Some equations cannot be solved by symbolic manipulations. Use a graph to find all solutions of the equation sin 8x = 2x - 1. Show the details in a sketch of the graph.

asked by jojo on October 24, 2015
76. ## Algebra

How far in miles is a line of 1,000,000 pennies. Please show chart with 5 instances. Define a variable and write an algebraic expression.

asked by Matthew on September 11, 2011
77. ## Math

You own 80 mp3s. You plan to add 10 more songs every month. Represent this relationship to show how many mp3s you have for th nxt six months. What is the independent x varible?

asked by Justin on December 10, 2014
78. ## PHYSICS PLS HELP

A falling 50-kg skydiver experiences an upward acceleration of 6.2 m/s2 when she opens her parachute. Show (by calculation) how much drag force is produced by the parachute.

asked by allexelle on July 7, 2015
79. ## Chemistry

The triation of 50.00 mL of 0.025 00 M MES with 0.100 0 M NaOH. MES is a weak acid with pKa=6.27. Compute Ve, first. Show what happens at the four stages of the titration: Va = 0,2,5,10,10.1,11,12, and 12.2 mL. I NEED HELP!!!!

asked by Lance on April 11, 2012
80. ## algebra

don't quite understand how to go about finding the answer to this problem. I have to find two different points for a line, graph it, and also above or below the line to show the relationship. How do I go about doing this? The equation is: 3y-8x >24 Thank

asked by Laura on March 21, 2011
81. ## physics

If the amplitudes of the two waves are 3 units and 1 unit respectively, show by the principle of superposition that the ratio of the amplitudes of the stationary wave at an antinode and node respectively 2:1

asked by Edwin on March 28, 2010
82. ## Science

a jogger with a mass of 60.0kg is moving at a speed of 3.0m/s. what is the jogger's kinetic energy? KE=270 joules Can you show me the steps to this answer please.

asked by Duane on July 16, 2014
83. ## Calculus

1.) Find the equation of the line that is tangent to the graph of y-y^3 at x=1. 2.) lim x->0 ((sin x*cos 2x)/3x) 3.) Show, using the squeeze theorem, that the limit of Xe^(sin 1/x) as x->0 is 0.

asked by Amber on January 25, 2015
84. ## Math

The function rule C= 10 n + 26 where n = number of people and c = cost of party. Show a table if 27,39 , & 43 people go. My answer is the following n 27 39 43 c 296 416 456

asked by steve on May 11, 2014
85. ## Chemistry

If 5.40 kcal of heat is added to 1.00 kg of water at 100C, how much steam at 100C is produced? sHOW ALL CALCULATIONS LEADING TO AN ANSWER. Q=m*Hf 5.4=m*80 m=5.40/80=0.0675kg

asked by Gloria on May 4, 2015
86. ## Business

The initials "L.S." at the end of a document: a. indicate that the signatures are lawful. b. show where the seal should be placed. c. serve as a substitute for a wax seal. d. both b and c. I believe the answer is D....both b&c...is that correct?

asked by Mike on February 15, 2008
87. ## Chemistry AP

Determine the value of x in al2(so4)3 . xh2o when 4 grams of aluminum sulfate hydrate was heated and 3.5 grams remain. (show working please)

asked by Roger on February 17, 2017
88. ## physics

Draw a speed v against time graph by guessing of the values of your trip to school this morning. show how this graph can be used to determine distance

asked by Anonymous on December 4, 2017
89. ## math

Hi I am looking for a certain number line for a test you guys should have a place in search so we all can show you if you have it then this web site will be poppen well that's all see is it take note place commet here

asked by Anonymous on March 25, 2010
90. ## School Projects

My son in grade 4 got zero for his project, "autobiography" What exactly are teachers wanting and is there a site that I can go to to show him some examples? Hes really upset and I don't know what the teachers wants!

asked by Lesley on February 6, 2009
91. ## Chemistry

Equation to show how it ionizes in aqueous solutions: example: HCLO4 HCLO4 + H2O---> H3O+ + CLO4- KOH Ba(OH)2 CsOH NaOH

asked by Monte' on December 17, 2007
92. ## Math (PreAlgebra) 8thG

Find the volume of a sphere with a radius of 10 feet. Round to the nearest whole number. V = (4/3)3.14(r)^3 = (formula) I don't know what to do about the fraction, four over three (4/3), in the formula.... Show me how to do this please?

asked by LovelyDec0y on February 18, 2013
93. ## physics

If the amplitudes of the two waves are 3 units and 1 unit respectively, show by the principle of superposition that the ratio of the amplitudes of the stationary wave at an antinode and node respectively 2:1

asked by Edwin on March 26, 2010
94. ## Sociology 206

Does anyone mind proofreading my essay for me. Its pretty short, only 3 paragraphs. I can't copy and paste it to this email, because it all wont show up. So perhaps someone would let me email it directly to them? ld really appreciate it.

asked by Amy on February 22, 2009
95. ## physics

Draw a speed v against time graph by guessing of the values of your trip to school this morning. show how this graph can be used to determine distance

asked by eyobed on December 4, 2017
96. ## 6th grade math

i buy 3 large sandwiches wraps, 9 people are guests, show 3 different ways to cut the sandwiches so that each person gets an equal share

asked by Alex on September 23, 2009
97. ## Chemistry

2KClO3 --> 2KCl + 3O2 What mass of O2 can be made from heating 125 g of KClO3? I know that the answer is 49 g O2 but I keep getting a completely different answer, can anyone show me what I'm doing wrong? Please & Thank you

asked by Ana on March 2, 2010
98. ## durhamtech

want raptor flow chart for rolling a dice five times and the total com to 20.flow chat must show user how to play the game

asked by zobon on March 9, 2015
99. ## pre cal

Given f(x)=x^4-7x^3+18x^2-22x+12 A: list all possible rational zeros B: Graph f(x) C: Find all zeros D: show f(x) in factured form thanks I can't figure it out. Can skip B... thanks

asked by Deb on March 12, 2008
100. ## Maths - Calculus

Can anyone help with this...I need to find the derivative of the functions below. If possible please show working so I can try and understand? f(t) =3-t^4 and g(t)=sin(4t) Then using the Quotient Rule differentiate the function k(t) 3-t^4/ sin(4t) (0

asked by Christine on February 13, 2011