# 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 44
1. ## precalculus

8. Solve the system of equations shown below. .3/4x-5/2y=-9 .-x+6y=28 x = 21.5, y = 8.25 x = -8, y = 6 x = 8, y = 6 x = -21.5, y = 8.25

asked by Anonymous on November 29, 2016
2. ## math

solve each system of equations by graphing y=x+1 y=3x-7

asked by gabby on January 18, 2011
3. ## algebra

solve the system of equations using substitution. y = 2x + 5 y = 3x a. (–5, –15) b. (5, 15) c. (–15, –5) d. (1, 3)

asked by tiffany on January 20, 2011
4. ## algerbra(college)

solve the system of equations by graphing -3x - 2y=24 3x-y=-6

asked by jay on November 19, 2009
5. ## Math

solve the following system of equations using matrices 4x-2y=7 7x+y=13

asked by Keya on July 29, 2014
6. ## Algebra 1B--check

Solve for y in the following system of equations. x + 4y = -38 -x - 6y = 58 My answer 1.) -10 2.) 6 3.) 12 4.) 10

asked by Mackenzie on April 17, 2012
7. ## algebra

solve the system of equations using substitution. y = x + 10 y = 3x a. (5, 15) b. (2.5, 7.5) c. (–15, –5) d. (–5, –15)

asked by tiffany on January 20, 2011
8. ## social studies

the most useful indicator of the degree of democracy reached by a politcal society is whether it has a: a)civilan goverment b)formal method wherby people can effect the change in goverment policy c)system of checks and balances d)two house legislature

asked by jessica on October 9, 2007
9. ## Physics

When you see a traffic light turn red, you apply the brakes until you come to a stop. Suppose your initial speed was 12.9 m/s, and you come to rest in 35.0 m. How much time does this take? Assume constant deceleration. What equation do I use to solve this

10. ## Algebra

Solve the logarithmic equation. Be sure to reject any value of x that is not in the domain of the original logarithmic expression. ln ã(x+4)=1 What is the exact solution? Select the correct choice below and, if necessary, fill in the answer box to

asked by edward on February 3, 2016
11. ## BIO 100

Assignment: The Scientific Method • Review Appendix D. • Open the Scientific Method Web site. • Follow the instructions at the bottom of the Web site to choose a hypothesis and prediction about growing plants. • Click on Do the Experiment. The

asked by Jessica Fuentes on August 29, 2010
12. ## Statistics

How do you solve this? 28!/(28-28)!28! * 0.88^28 *0.12^28-28 I need help on how to solve this on a graphing calculator(TI-83 Plus) Can you help me? Please show step by step instructions! Thank you!!!

asked by Valerie on October 25, 2011
13. ## Laboratory (math, chemistry)

Most analytic methods are subject to drift. Describe a system which could be used to determine the rate of drift of an analytic method.

asked by Maranda on February 12, 2013
14. ## Algebra

Please show me how to solve this problem. 8/x^2-16 + 3/4 = 1/x-4 multiply each of the terms by x^2, collect your like terms and bring them all to the left side. You will have a quadratic equation. BTW, since you did not use brackets I will assume your last

asked by Marie on May 8, 2007

An aqueous solution contains 0.223 M carbonic acid and 0.112 M hydrobromic acid. Calculate the carbonate ion concentration in this solution. [CO32-] = mol/L. Can you please help me how to solve this problem?

asked by Rick on April 25, 2012
16. ## chemistry

the Ksp of Bi2s3 at room temmperature is 1.60x10-72, what is its solubility in g/100 ml? Please help me with the solution. Our teacher haven't discussed this yet so I have no idea how to solve this.. and if i ever got the answer with your solution. could

asked by help on February 5, 2015
17. ## Math

Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3

asked by Travis on January 29, 2016
18. ## precal

Solve the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to three decimal places where appropriate. If there is no solution, enter NO SOLUTION.) 2 cos2 θ − cos θ − 1 = 0

asked by stellar on October 22, 2011
19. ## chemistry

A solution of sodium cyanide NACN has a PH of 12.10. How many grams of NACN are in 425ml of solution with the same PH? Please helps me to solve it for me

asked by Fai on August 5, 2012
20. ## Pre calculus

Solve for all values between zero and 360 degrees. cos(theta-42 degrees)=-1 What is the general solution and what is the solution????

asked by Anonymous on November 14, 2013
21. ## algebra

Solve each inequality. State the solution set using interval notation and graph the solution set. 1-x

asked by Marsha on April 6, 2010
22. ## Math

Solve two solutions. If there is a solution write it or I there isn't any write no solution. -3ly-3l = 9 (l l is absolute value sign)

23. ## Math

-14+26-37-45+56-67-71. ___? i don't know how to solve this so plz tell me this with solution. -12-(-24)+(-36) my answer is 0 but its wrong i cant understand tell me this with solution plz. Thanks

asked by purplemath on October 9, 2009
24. ## Algebra 1

Use the multiplication property of inequalities to solve the inequality. Graph the solution set -1/9t≥2 The solution set is?

asked by Tammie on August 10, 2012
25. ## math

Jerry is 50 inches tall growing at a rate of 1/24 inches per month. Adam is 47 inches tall growing at a rate of 1/8 per month. If they continue to grow at these rates for the next 4 years in how many months will they be the same height? Solve two different

asked by Robin on April 14, 2014
26. ## maths/Operating research

Solve the LP using graphical method Maximize p = 30x + 40y subject to x + y

asked by lilian on June 17, 2011
27. ## Math

graphing method to solve linear programming problem. z=8x+12y 40x+80y=560 6x+8y=72 x=0y=0 Is there a short cut to find the mmaximum without using the graph?

asked by Marie on February 27, 2010

Solve for B: square root b^4/25 = 4. A.) 2 B.) +/- 5 square root 2 C.) 3 D.) +/- 2 square root 5 I don't know how to do these so please show your work. Thank you.

asked by Jack on March 21, 2013
29. ## math help plz really urgent

1. The formula M=log I/S determines the magnitude of an earthquake, where I is the intensity of the earthquake and S is the intensity of a “standard earthquake.” How many times stronger is an earthquake with a magnitude of 8 than an earthquake with a

asked by sammi on January 31, 2017
30. ## accounting

Kudos Leather Goods purchased the following items during the month of April: 1. April 12, 34 wallets @ \$12.95 each 2. April 08, 24 wallets @ \$13.10 each 3. April 18, 15 wallets @ \$13.25 each 4. April 26, 20 wallets @ \$13.27 each On April 1, the business

asked by working hard on August 23, 2012
31. ## accounting

Kudos Leather Goods purchased the following items during the month of April: 1. April 12, 34 wallets @ \$12.95 each 2. April 08, 24 wallets @ \$13.10 each 3. April 18, 15 wallets @ \$13.25 each 4. April 26, 20 wallets @ \$13.27 each On April 1, the business

asked by working hard on August 23, 2012
32. ## sociology

How does racism and class system work together

asked by Anonymous on June 15, 2011
33. ## science

how does the human reprodutive system work?

asked by freddy on November 3, 2007
34. ## physics

A block starts with a speed of 18.0 m/s and slides for a distance of 2.2 m down a 40° ramp (muk = 0.43). What is its final speed? (m/s) Thanks for suggeting the following solution. The block starts with an initial speed of 18.0 m/s.Does it have any

asked by sandhu on November 28, 2010
35. ## chemistry

A 152g sample of ice at -37 degrees Celsius is heated until it turns into liquid water at 0 degrees Celsius. Find the change in heat content of the system. I'm really confused on how to solve this question knowing the fact that the state of the system is

asked by maath on January 14, 2019
36. ## math

Consider an equilateral triangle with points located at each vertex and at each midpoint of a side. (See picture.) This problem uses the set of numbers {1, 2, 3, 4, 5, 6}. Place one number at each point. Call the sum of the three numbers along any one side

asked by al on October 10, 2014
37. ## Algebra

Find the area of the irregular figure (use 3.14 for pi). SHow your work. Round to the nearest tenth. Triangle with a semi-circle on it. The triangles height is 4.8ft and the circle's diameter is 3.6ft. Every time I do my work I keep getting 12.3 and I have

asked by Baby_Banana on April 4, 2018
38. ## value

An Effort Of 250N Raises A Load Of 1000N Through 5m In A Pulley System.If The Effort Moves 30m,what Is; (a)the Work Done In Raising The Load (b)the Work Done By The Effort (c)the Efficiency

asked by mr.m on February 5, 2017
39. ## Maths

If y is a function of x and z = e^z, show that: x (dy/dx) = (dy/dz) and (x^2) (d2y/dx2) = (d2y/dz2) - (dy/dz) I managed to work out the first part. But I don't know how to prove the second part. Can someone please show me how? Thanks!

asked by Claire on February 3, 2010
40. ## Math

36. A clock gains 20 minutes each day. if the correct time is indicated now , in how many days will it again show the first correct time? Please show work/explain A.8 B.18 C.20 D.36 E.72

asked by Johnny on May 8, 2014
41. ## Math

I would like to know if I got this problem correct. The perimeter of a rectangle is 42ft. the length is 7ft. longer than the width find the dimensions. Write a system linear equation an solve the resulting system let x be the length and y be the width.

asked by Denise on August 5, 2013
42. ## physical geography

1- A traveler leaves lima, Peru( approximately 12 degrees S Lat. And 90 degrees W. long.) at 8:00 am on Tues. Oct. 3rd and travels for 14hrs before arriving in Sydney, Australia( approx.34 degree S and 150 degrees E). what time and what day would the

asked by mike on January 27, 2007
43. ## Physics

1)A car is moving with uniform accelaration. It moves along two point A and B and enters with velocity 50 m/s and 80 m/s respectively . Find the velocity when the car is moving in b/w the point A and B. Let t be the time measured from when the velocity is

asked by Prathiksha on August 24, 2011
44. ## math

if i have 12 markers,but one sixth of them work.wich one is equal to one sixth. A.10/12 B.8/12 c.4/12 d.2/12 Show work

asked by randy on November 7, 2007
45. ## Mathematics-Integration

Question: For any positive integer n,show that integrate.[(sin x)^2n dx ] from o - π/2 = [(2n)!*π]/[(2)^(2n+1)*(n!)^2 ] What I thought: Let I =int.[(sinx)^2n dx] And again I= int.[ (sin(π/2-x))^2n dx] = int.[ (cos)^2n dx] 2I= int.[(sin x)^2n + (cos

asked by Shenaya on June 12, 2017
46. ## Trigonometry (Logarthims)

Give checks to the following two questions Use logarithms and the law of tangents to solve the triangle ABC, given that a=21.46 ft, b=46.28 ft, and C=32°28'30" without logarithms i can do this problem easily and i have. but when i try solving it with

asked by Anon on February 24, 2011
47. ## Math

The method used to calulate depreciation for federal tax purposes is the ? Is it the declining balance method

asked by Debbie on November 9, 2008
48. ## algerbra 1

The decimal notation for the fraction -9/16 is Round to the nearest hundreth Solve 5x+8x=78 The solution is x= Simplify the answer. Type an integer of decimal. Solve using the addition principle 9.5=p-9.2 The soluation is p=

asked by Connie on November 16, 2011
49. ## math

Solve 2 + 2 sin θ = 3 cos^2 θ. Give the general solution and then give solutions in [−π, π] How do i solve for theta?

asked by Daniel on July 28, 2016
50. ## Calculus

Using the Disk Method or washer method (im not sure which one) Find The volume of y=x^3 , y=1 , x = 2 revolving around the X axis

asked by Andrew on December 16, 2008
51. ## Algebra 2

Find the distance between the points (12, 8) and (4, 2). 100 units 14 units 10 units –10 units Find the midpoint of the points (3, 1) and (7, –5). (1, 6) (2, 1) (2, –3) (5, –2) Find the vertex and focus of the parabola whose equation is 4y = x2 +

asked by Ben on June 4, 2011
52. ## chemistry

The basicity constant of pyridine can be expressed as pKb = 8.75 what will be the pH of a 1M (1 mole per liter) solution of pyridine in water? Py + HOH ==> PyH^+ + OH^- Kb = (PyH^+)(OH^-)/(Py) Change pKb to Kb, plug in x for (PyH^+) and (OH^-) and 1 for

asked by howie on August 5, 2007
53. ## HCA/210 INTRODUCTION TO HEALTH CARE

Write a 700- to 1,050-word paper that addresses the following: Develop a unique proposal that describes a new health care system. Consider the current U.S. health care system’s strengths, weaknesses, and challenges. Be sure to include your answers to the

asked by Anonymous on July 25, 2010
54. ## Math-Ms. Sue

Ms. Sue could you please show me how slove this equation. Could you show me how to solve it like this: for ex.: x-15 = -8 +15 +15 x = 7 I need help with this equation: -10=W-32+6

asked by Sara on February 2, 2010
55. ## science

1 A ……... is a rectangular array of numbers that are enclosed within a bracket . horizontal set vertical matrix 2 When the numbers of rows is equal to the numbers of columns equal to 'n'. Where m=n. Then is called….. a square matrix a column

asked by sunday on March 15, 2014
56. ## algebra

x+1 -x+2 = x+3 ____ _____ ____ 2 3 4 How do I solve this equations? These are fractions mi don't know I'm going to assume your problem is this: (x+1)/2 - (x+2)/3 = (x+3)/4 ...and you are trying to solve for x. If so, here's how you would go about it:

asked by deborah on February 5, 2007
57. ## MATH HELP NEEDED prt 2

–2v – 7 = –23 (1 point) 15******** 8 –8 –15 2. start fraction x over 3 end fraction – 10 = –12 (1 point) –6 –66 6****** 66 3. start fraction x over 5 end fraction + 6 = 10 (1 point) 44 30 20******** –20 4. 3(4 – 2x) = –2x (1 point)

asked by Bill Cipher on November 26, 2016
58. ## chemistry

How many grams of C6H12O6 need to be dissolved in 350g of water vto have a solution which freezes at -2.50 degrees celcius? delta T = Kf*m You know Kf, m = molality = mols/kg and mols = grams/molar mass, delta T is 2.50. Solve for grams. Post your work if

asked by jessica on May 31, 2007
59. ## management information system

office system are: a. strategic level system b. management level system c. operational level system d. knowledge level system please answer i answered letter c and its wrong, i think its letter a????

asked by ♥ roses on August 4, 2011
60. ## Maths

For the fixed point iteration method; re-arranging method, how can I describe ho the iterative formula works?

asked by Ronald on November 7, 2010
61. ## Urgent Math

Suppose the area under y = -x^2+1 between x = 0 and x = 1 is rotated around the x-axis. Find the volume by using Disk method and shell method.

asked by Wawen on September 28, 2016
62. ## Computer

Which of the following is part of the signature of a Java method? A. the method body B. modifiers C. the return type D. parameters

asked by Awesome on November 6, 2015
63. ## math:(

how do you compare the symbolic method for solving linear equations to the method of using a table? PLEASE HELP MY BUS COMES IN 30 MINUTES!!!

asked by malisa on April 6, 2012
64. ## tax

How to calculate net rental income using IRS method and the Tax Court method? I need help please i don't know how to do this

asked by Andy on March 28, 2012
65. ## Macroeconomics

What are the key elements of the scientific method and how dose this method relate to economic principles and laws?

asked by Alex on September 26, 2010
66. ## science

I don't understand how to do this problem because i don't see a precipitate. If you could show your work on the problem that would be great so i can follow along! Identify the spectator ion(s) in the reaction Zn(OH)2+ H2SO4→ZnSO4+ 2H2O in aqueous

asked by Agnes on March 9, 2013
67. ## science

I don't understand how to do this problem because i don't see a precipitate. If you could show your work on the problem that would be great so i can follow along! Identify the spectator ion(s) in the reaction Zn(OH)2+ H2SO4→ZnSO4+ 2H2O in aqueous

asked by Agnes on March 9, 2013

Find the pH of a mixture of .150 M HF(aq) solution and 0.100 M HClO2(aq) HF + H2O F- + H3O+ Ka= 3.5*10^-4 So I will show my attempt below... [HF] [F-] [H3O+] I .150 0 0 C -x +x +x E .15-x x x Ka= [F-][H3O+]/[HF] 3.5*10^-4= x^2/(.150-x) assume x is small so

asked by Erin on April 26, 2010
69. ## Chemistry

At what initial concentration would a solution of acetic acid (ka=1.8x10^-5) be 2% ionized? Thanks Responses Chemistry - DrBob222, Thursday, February 12, 2009 at 10:00pm Let's call acetic acid HAc. Then the ionization is HAc ==> H^+ + Ac^- We will call the

asked by Chemistry - Repost for DrBob222 on February 12, 2009
70. ## Math

Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3

asked by Zach on January 29, 2016
71. ## Math

Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3

asked by Zach on January 29, 2016
72. ## Math

Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3

asked by Zach on January 29, 2016
73. ## Math

Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3

asked by Zach on January 29, 2016
74. ## College Chemestry

an agueous solution of ethlylene glycol (C2H6O2) is 40% ethylene glycol by mass, and has a density of 1.05g/ml. What are the molarity, molality, and mole fraction of the solution? Do you know how to solve this...I am kinda lost..please help

asked by Gary on October 26, 2008
75. ## Math

Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3

asked by Zach on January 29, 2016
76. ## Science

Concentrated phosphoric acid is 90% by mass and the remaining mass is water.The molarity of phosphoric acid in 90% is 12.2M at rtp. a)What is the density of the solution at rtp ? b)What volume (in mL)of this solution is needed to make a 1.00L solution of a

asked by Joseph on November 11, 2015
77. ## Math HELP

2 boys and 5 girls can finish a piece of work in 4 days. 4 boys and 4 girls can finish the same work in 3 days. If a girl paid rs 750 each day, what may be the expenditure to complete the work? Tomorrow is my test and I don't know how to solve this

asked by A GOODSTUDENT on September 1, 2016
78. ## Algebra

Josh and Racquel sold cookies and brownies at the math club bake sale. The cookies cost \$0.47 each, and the brownies cost \$0.60 each. They sold a total of 603 items (cookies and brownies) and raised \$323.84 Write a system of equations and determine the

asked by Katy on March 25, 2012
79. ## physics 12 - dynamics

Hi, I'm just confused as to what steps to take in order to solve these problems. If you could please show your steps and method on how to approach these questions to get the answer that would be great. I have the answers to these too, if needed. I want to

asked by iintense on February 16, 2010
80. ## Algebra

Can someone please tell me if my work and solution looks correct. I am a little unsure of whether or not I did it correctly. Equation: sqrt(x+2) - x = 0 sqrt(x+2) = x x + 2 = x^2 x^2 - x - 2 = 0 (x-2)(x+1) = 0 x = 2 and x = -1 -1 does not work, so the

asked by Renee on January 4, 2009
81. ## Chemistry

1. A lab tech needs 1.00 L of 0.125 mol/L sulfuric acid solution for a quantitative analysis experiment. A commercial 5.00 mol/L sulfuric acid solution is available from a chemical supply company. Write out what steps he/she would follow to prepare the

asked by AlphaPrimes on April 2, 2016
82. ## classroom management

Collecting, correcting, recording, and returning seatwork assignments (for the teacher) Completing assigned work on their own (for the student) Responses would include strategies for challenges so for teachers some examples would include providing more

asked by scooby on May 7, 2010
83. ## 8th grade math asp help

Plz help me ASPWrite a sequence of transformations that maps quadrilateral ABCD onto quadrilateral A" B"C"D" in the picture below. like talk about it Find the area for the circle ( use 3.15 for pi). show your work. round to the nearest tenth. and the next

asked by supergirl on March 13, 2017
84. ## Chemistry

Say there is a diluted solution and we need to find the final concentration of it, using the equation M1V1 = M2V2. Does this method change, if the compound (concentration that we're trying to find), is in a solution that has already reacted with another

asked by Naomi on January 28, 2017
85. ## equations and inequalitys

You are saving moneyto buy a \$200 video game system.You earn \$20 a week for doing chores around the house.You get \$35 from a reliative on your birthday.How many whole weeks will it take for you to have enough money to buy the system? You are charged 7%

asked by anymous on August 27, 2012
86. ## Algebra 1

which graph represents the solution of the given system? y=3x+2 y=3x-1 please hep!!

asked by Sierra Elizabeth on January 4, 2016
87. ## Math

For this system, is the ordered pair a solution of both equations?How do you know? (5,1) y=-x+4 y=x-6

asked by Angie on March 30, 2009
88. ## solving systems by elimination

What is the solution to the linear system –4x + 2y = –56 and –3x – 6y = 33?Question 3 options: (–9, 10) (–9, –10) (9, 10) (9, –10)

asked by alli on January 5, 2011
89. ## math

Q1. Determine the value of k for which the given system of equations has unique solution: a) 2x – 3y = 1 ; k x + 5y = 7 b) 4x – 5y = k ; 2x – 3 y = 12

asked by aayu on June 21, 2017
90. ## Algebra

Identify the solution(s) of the system of equations, if any. x+5y=5 2x-15y=0

asked by Tia on June 2, 2013
91. ## Math

asked by Janice on August 19, 2011
92. ## HELP !!! Algebra 2

15. What is the solution of the linear-quadratic system of equations? {y = x^2 + 5x - 3} {y - x = 2}

asked by Robert on November 16, 2012
93. ## Calculus

Determine whether the given orderd pair is a solution of the system ( -2, 1) X/3

asked by Kelly on November 27, 2007
94. ## math

Which ordered pair is a solution to the system of equations? {4x+y=2 −2x+y=5 A. (1, -2) B. (- 1/2, 4) C. (2, -6) D. (7/2, -12)

asked by Jay on January 9, 2017
95. ## Math: algebra 1

6. In which quadrant does the solution of the system fall? y = x – 1 y = –3x – 5 A.) I B.) II C.) III D.) IV I think it is c.

asked by Timothy on November 27, 2012
96. ## math

Identify the solution(s) of the system of equations, if any. 3x-2y=6 5x=5-25y a) (28/13, 3/13) b) (-3/17, 32/17) c) (32/17, -3/17) d) (32/9, 7/3)

asked by monet on January 30, 2013
97. ## Algebra 2

Find the exact solution(s) of each system of equations? x^2+y^2=25 and 9y=4x^2 a.(4,3),(-4,3) b.(3,4),(3,-4) c.(4,3),(4,-3) d.(3,4),(-3,4) I had d but im not sure if that is right.

asked by Chely on November 13, 2007
98. ## Algebra

Identify the solution(s) of the system of equations, if any. -6x - 4y = 24 8y = -12x - 48

asked by Tia on June 2, 2013
99. ## algebra

Identify the solution of the system of equations, if any. -4x-2y+=4 8y+16x-16

asked by bre on June 20, 2014
100. ## math

is each ordered pair a solution of the given system? write yes or no. y=6x+12 2x-y=4 (-4,-12)

asked by Anonymous on April 25, 2010