# 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 71
1. ## college

Suppose that the number of cars, C, on 1st Avenue in a city over a period of time t, in months, is graphed on a rectangular coordinate system where time is on the horizontal axis. Further suppose that the number of cars driven on 1st Avenue can be modeled

asked by Jeffery on February 19, 2010
2. ## General Chemistry

Starting out with 50 mL of 0.20 M NaHCO3, calculate how many mL of 0.50 M NaOH solution to add to make 100 mL of approximately 0.10 M (total) buffer solution with a pH of 10.35. By adding NaOH, some of the NaHCO3 gets converted to the conjugate Na2CO3.

asked by Lucy on April 3, 2012
3. ## Algebra

Remember to show all of the steps that you use to solve the problem. Use the comments field to explain your work. A survey about the student government program at a school finds the following results: 190 students like the program 135 students think the

asked by Secret on March 20, 2013
4. ## Algebra II Funtion

f(x)=x-11 f(4) f(4)=4-11 f(4)=-7 This is my work for this function. Is it correct? And can you help me solve the next one? f(x) =9x3 - x2 + 2 ; f(2)

asked by Cora on October 3, 2012
5. ## ALGEBRA/AM I CORRECT?

THANK YOU! Solve by substitution 3x+6y=6; -6x+y=40 My WORK: Y=40+6X; 3X+6(40+6X)=6; 3X+240+36X=6; x=-5.51; y=40+6(-5.51); y=40+-33.06; y=6.94 (-5.51,6.94) Is this right???

asked by Jessica on December 11, 2010
6. ## algebre II

Factor and solve: 4x^3-32=0 Please so work so I can finish on my own with an example problem. Thanks!

asked by Savannah on February 24, 2010
7. ## math

solve the following exponential equation e^x-4=-e^-x when I work i get x-In(u) is this correct

asked by Heather on January 9, 2013
8. ## Algebra

Solve using distributive property (Shaow all Work) 8t-4+3(y+7)=6y-3(y-3)

asked by Jameisha on December 2, 2008
9. ## Algebra

2. Use an augmented matrix to solve the system. x + y = 5 3x – y = –1 (1 point) (1, 4) (1, 5) (3, –1)*** (5, –1) 3. When converting a system of linear equations into an augmented matrix, what equation form is needed? (1 point) slope-intercept form

asked by Student on January 21, 2019
10. ## Algebra

The prices of the systems are: \$1200 for System 1, \$1500 for System 2, \$1600 for System 3, and \$1800 for System 4. Write the information from the table as a 4 x 3 matrix B. Write a row matrix A for which the entries represent the prices for the systems. If

asked by Mary on July 30, 2018
11. ## Chemistry

Hi,may I have your help? I have posted a titration question that I'm trying to solve. The correct answer to the problem is 0.128 M, however,I have arrived at the answer: 0.000128 M. Here's the question: If 38.30 mL of 0.250 M NaOH is used to titrate 25.0

asked by Cliff on December 10, 2010
12. ## calculus

A bucket that weighs 4 lb and a rope of negligible weight are used to draw water from a well that is 70 ft deep. The bucket is filled with 44 lb of water and is pulled up at a rate of 2 ft/s, but water leaks out of a hole in the bucket at a rate of 0.2

asked by megan on March 15, 2017
13. ## algebra

1)Identify the y-intercept and the axis of symemetry for the graph of f(x)=-3x^2+6x+12. answer=12:x=1 2)Determine whether f(x)=-5x^2-10x+6 has a maximum or minimum value and find that value. answer=maximum -1 3)Solve x^2=4x by graphing and indicate the

asked by Marissa on August 14, 2007
14. ## Math

A 12% solution and a 24% solution are to be mixed to create 80 mL of a 16% solution. How much of each should be used? Is the correct answer 53 1/3 L of the 12% solution and 26 2.3 of the 24% solution?

asked by Alyonka on February 12, 2013
15. ## Physics

Actually, I have 3 questions to solve. I know the 1st one requires Coulomb's constant, but I just can't get the formula to work. Ditto for the formulas for the other 2 questions. 1) A 6.3 μC point charge and a −1.7 μC point charge are separated by a

asked by Jane on July 10, 2014
16. ## As physics

Q11.The table below shows how the braking distance x for a car depends on its initial speed u. | u / ms-1 | 5 | 10 | 20 | 40 | | X / M | 2 | 8 | 32 | 128 | The relationship between x and u is: doubling speed increases distance by a factor of 4. i)The

asked by cylinder on December 5, 2017
17. ## maths

please help find the general solution of the following first order differential equation. dx/dt = tx + 6t(exp)-t^2 pls show working

asked by micheal on October 26, 2011
18. ## chemestry

show a correct numerical setup for determining how many litters of a 1.2M solution can be prepared with a .50 mole of c6h12o6

asked by edward on January 19, 2011
19. ## maths extrema need hlp

f(x,y)=sinx+siny+sin(x+y), 0

asked by bamayanhguya on March 13, 2017
20. ## math143

2x3-4x2+23=y A.is(-4,-167) a solution? Show/explain b.is(3,51) a point on the graph c.give the y-intercept

asked by John on June 7, 2016
21. ## Physics

An object moves with acceleration given by a = -6t^3 m/s^2. Its initial velocity at t = 0 is 5 m/s. How far will it move before stopping? ((((((The answer is " 7.5 m " ))))) Can you please show me the solution.

asked by Jane on January 13, 2016
22. ## maths

find the general solution of the following first order differential equation. dx/dt = t*x + 6*t(exp)-t^2 pls show working

asked by micheal on October 26, 2011
23. ## Maths

How do we show that the function y(x)=1 is a solution of y'' + 4y = 0 ? I tried integrating the differential equation, but only resulted with squares and cubes of y and x. Please guide!

asked by Ashley on May 23, 2019
24. ## Intermediate Algebra

Can you show the work of how to work this word problem ? A local electronics store will sell 7 ax adapters and 2 rechargeable flashlights for \$86 or 3 ac adapters and 4 rechargeable flashlights for \$84. What is the price of a single ax adapter and a single

asked by Anonymous on February 21, 2014
25. ## Intermediate algebra

Can you show the work of how to work this word problem ? A local electronics store will sell 7 ax adapters and 2 rechargeable flashlights for \$86 or 3 ac adapters and 4 rechargeable flashlights for \$84. What is the price of a single ax adapter and a single

asked by K on February 21, 2014
26. ## Pre-Calculus

Solve by using the substitution method 1.x=-3y+4 and 3x+9y=12 3(-3y+4)+9y=12 -9y+12+9y12 0=0 x=-3(0)+4 x=4 Would there be infinite solutions or would it be (0,4)? 2. x=3y-1 and 2x-6y=-2 2x-6y=-2 2(3y-1)-6y=-2 6y-2-6y=-2 0=0 x=3y-1 x=3(0)-1 x=-1 Would there

asked by Caroline on January 22, 2013
27. ## maths

(a)(i)use the composite rule to differentiate the function f(x)=(x^2-6x+23)^(3/2). (ii)use the composite rule and your answer to part (a)(i) to show that the function g(x)=(x-2)/(x^2-6x+23)^(3/2) has derivative g'(x)=(5+9x-2x^2)/(x^2-6x+23)^(5/2).

asked by alan on May 20, 2011
28. ## Chem

1. What is the molarity of a copper(II) dihydroxide [Cu(OH)2] solution if 25.25 mL of the solution is titrated to the equivalence point with 36.18 mL of 0.549 M prussic acid [H(CN)]? 2. What volume of a 0.138 M dihydroxyl base solution is needed to

asked by TK on March 29, 2015
29. ## Math

A group of people are going to see a musical playing at a theater. Adult tickets are \$53.50 and children’s tickets are \$19.25. A.) Write an expression to show the cost for x adult tickets and y children’s tickets. 53.50x + 19.25y= B.)What is the cost

asked by Beck on October 6, 2016
30. ## Chemistry

Three unknown solutions were prepared by pipetting 15.00 mL of an unknown nickel solution into a 200.00 mL volumetric flask and diluting to the mark. Then three samples were prepared from this dilute unknown solution by pipetting 5.00 mL of the dilute

asked by Christine on January 14, 2018
31. ## Math

William multiplied (-2x+1-3y)(-0.5x) and got the wrong solution. Review his work and identify the step in which William made his first error. Step 1 (-2x+1-3y)(-0.5x) Step 2 (-0.5x)(-2x-3y+1) Step 3 -0.5x(-2x)-0.5x(-3y)-0.5x(1) Step 4 x^2+1.5xy-x I think

asked by Cherie on June 10, 2019
32. ## pre-calculus

solve the logarithmic equation. be sure to reject any value of x that is not in the domain of the orginal logarithmic expression. In square root of x+2=2 (If I try to make the square root sign it will not come out right so I wrote it out instead) What is

33. ## Science

Describe, in 200 to 300 words, the path food follows through the digestive system and how digestion occurs in each of the following parts of the digestive system. Be sure to include descriptions of other organs or components of the digestive system,

asked by Anonymous on January 17, 2010
34. ## Calc problem

Consider the function y=(kx)/(x-k) a. Show that y is symmetric with respect to the line y=x. b. Write the equations of the horizontal and vertical asymptotes of y. c. Find the point(s) of intersection of y with the line x-y=-2k, and find the slope of the

asked by Holly on February 23, 2008
35. ## Physics

Please help me with this its very hard to visualize the problem. The analytical method of adding vectors expressed in terms of their components may be applied to vectors in three dimensions, for which graphical work is inconvenient. Find the magnitude of

asked by Donna on September 26, 2016
36. ## writing

I was wondering if some1 could help me in the right direction with this assignment. Background Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office

asked by Brenda on May 20, 2011
37. ## Trigonometery help plz

Show that cos^2(theta)+tan(theta)cosec(theta)=cos??? Show work

asked by Collins on October 21, 2015
38. ## Trigonometry

I have some trigonometric equations to do, but I'm pretty lost, and I have to get them done in a timely fashion, so any help would be much appreciated. "Solve the following trig equations. Give all the positive values of the angle between 0 degrees and 360

asked by Gary on March 9, 2011
39. ## To Math Helpers please:Math 2 questions

I'll retype it, Ive been waiting forever and i just need someone to do these 2 questions so that i can continue doing my other ones so can someone do them: I need help with 2 questions so that I could do my other ones myself so can someone please do these

asked by Anonymous on May 22, 2013
40. ## English

It is very rude of you to behave like that. It is very wise of you to answer the question. It is very stupid of you not to solve the math problems. It is smart of you to solve the math problems. It is careless of you to hit the jar while driving. It is

asked by John on July 9, 2009
41. ## chemistry

A student prepares a solution of hydrochloric acid that is approximately 0.1 M and wanted to determine its precise concentration. A 25.00 mL portion of the HCl solution is transferred to a flask, and after a few drops of indicator are added, the HCl

asked by walter on June 14, 2015
42. ## Chemistry

A solution is prepared by mixing 0.12 L of 0.12 M sodium chloride with 0.22L of a 0.19M MgCl2 solution.What volume of a 0.22 M silver nitrate solution is required to precipitate all the Cl- ion in the solution as AgCl ?

asked by Abril on March 13, 2010
43. ## time and stress management

if you have to many tasks to complete at work ,you should (a)take a deep breath and start at the top of the pile and work your way down as quickly as possible (b)complain to your boss that its an inreasonable amount of work (c)decide for yourself what is

asked by susue on October 8, 2012
44. ## chemsitry

100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. calculate final molarity of h2s04 solution, if final density is 1.25g/ml. Answer 0.227M Who helps me to solve it Thank you a lot

asked by Ferda on December 28, 2014
45. ## Algebra

please check my answers. thanxs! Solve the polynomial inequality and graph the solution set on a number line. Express the solution set in interval notation. x^2 - 6x + 5 > 0 -I got (-ininity,1) u (5, infinity) x^2 - 3x - 18 < 0 -I got (-infinity,-3) u (6,

asked by Liz on October 24, 2007
46. ## Inequality

please check my answers. thanxs! Solve the polynomial inequality and graph the solution set on a number line. Express the solution set in interval notation. x^2 - 6x + 5 > 0 -I got (-ininity,1) u (5, infinity) x^2 - 3x - 18 < 0 -I got (-infinity,-3) u (6,

asked by Liz on October 23, 2007
47. ## psy - revise

Psychotherapy is a method used to treat mental and emotional disorders. People that suffer from these disorders talk to a mental health professional about their concerns and other related issues through a series of scheduled sessions. This method can also

asked by rose - Ms. Sue on May 29, 2008
48. ## Physics

A plane traveling at 200.0 km/h attempts to land on a 250 m runway. The plane’s engines and brakes accelerate uniformly at –7.0 m/s2. Will the plane be able to land safely? Show all your work. Include any equations used, including the given and the

asked by Vivian on March 5, 2015
49. ## Chemistry

If solution A had a pH of 8, and solution B had 1,000 times this hydrogen ion concentration what would be the pH of solution B, and would solution B be acidic or basic?

asked by Kristin on November 14, 2011
50. ## Science

Three acids solutions have the following pH: Solution A: pH = 2 Solution B: pH = 5 Solution C: pH = 3 Which solution is made with the acid that has the smallest ionization constant?

asked by Megan on June 30, 2011
51. ## medicine

What is final concentration of a mixed solution combining 50ml of 20% solution, 150 ml of a 15% solution and 200 ml of a 35% solution?

asked by Lisa on July 20, 2010
52. ## Math - Complex Numbers

Could someone show me how to get the work for: 3/4 (sqrt)-16/25 ? The answer says 3/5i. Could anybody tell me how to get there and work with complex fractions and simplify them? Thanks! 3/4 SQRT(-16/25) 3/4 SQRT( 16/25*-1) 3/4 *4/5 *SQRT( -1) but the sqrt

asked by Danielle on May 8, 2007
53. ## Socil Studies

Which of the following statements about the state executive branch System of departments and agencies are true? Mark all that apply.(2 points) (A)The system is comparable in purpose to the legislative committee system in many ways (B) All State agency

asked by Any:) on January 22, 2016
54. ## social studies

which of the following statements about the state executive branch system of departments and agencies are true? A.The system is comparable in purpose to the legislative committee system in many ways. B.All state agency heads are constitutional officers.

asked by Katey on January 23, 2014
55. ## maths

An initial-value problem is given by the differential equation, f(x,y) = x + y, y(0) = 1.64 The Euler-midpoint method is used to find an approximate value to y(0.1) with a step size of h = 0.1. Then use the integrating factor method, to find the exact

asked by Matthew on September 29, 2013
56. ## science

Moving at 20m/s a carr of mass 2000kg applies its brakes and comes to rest over a distance of 10m. Find the size of the net force that acted to stop the car. would I find t using t=dv. then would I use that for F=(m*v)/t ? The speed doesn't stay constant,

asked by Jenny on November 20, 2006
57. ## pre-calculus

solve for the following exponetial equation. 1.4^x=(0.5)^-x What is the exact answer? A. x= b. There is no solution.

58. ## Maths

Solve the equation(GS general solution) 5sin^2x-3sinx-2=0

asked by Ndaba on August 23, 2017

How do i solve this algebra problem? (5-a)divided by (a+7)=1/4 with 1,2,3, as solution set

asked by Lucian on December 4, 2008
60. ## algebra

Solve the compound inequality graph solution-2

asked by jim on February 24, 2014

Solve: 12+4|6x−1|

asked by jc on February 16, 2013
62. ## Math Help Me Please

4 Determine which ordered pair is not a solution of y= -5x – 4 A (10, -52) B (7, -39) C (-7, 31) D (8, -44) I don't know how to solve it?

asked by SmartyPants on March 17, 2015
63. ## Algebra

How do you solve the following problem? 3(4+4x)= 12x+2 It has no solution. X can be any value, and it wont equal.

asked by James on April 10, 2007
64. ## Algebra - check to see if correct

5/(y-3)=(y+7)/(2y-6) i got no solution and i got y=3. Solve each equation. Watch for extraneous solutions.

asked by jackie on March 1, 2009
65. ## Math the end

Can domeone help me with this? solve 7x + 4 ¡Ý - 31 or 9x + 4 ¡Ý - 21 I need to know how to write the solution {x x> } This is my last day of this class

asked by Katie on September 23, 2011
66. ## algebra

Solve the compound inequality graph solution 6x-410

asked by Tammy on February 25, 2014
67. ## Math 116A

Solve 3(3-8x)+5

asked by katie on September 22, 2011
68. ## math

1/2x^2=x/4+1 how can i solve that with quadratic formula?plz i need the solution fast.

asked by Riana on January 28, 2013
69. ## MHF4U

Solve: 12+4|6x−1|

asked by jc on February 16, 2013
70. ## Algebra

Solve the inequality. Graph the solution on a number line. -2 ≤ d + 0.5 ≤ 4.5

asked by Anonymous on January 12, 2015
71. ## Math 116 A

Solve 3(3-8x)+5

asked by katie on September 22, 2011
72. ## Math

Solve & check your solution ( if checking isn't possible, explain why ) 5x/4 + 1/2 = x - 1/2

asked by Cindy on August 31, 2012
73. ## Algebra

Solve the equation 5x+7=13-7x graphically. then check your solution algebraically.

74. ## Algerbra I

Help! I don't get this. solve each inequality. Graph the solution set, if there is one. 1. n-4>11 2. 4q7 4. a+3s/3 8. x/2-4>-6

asked by Jared on February 4, 2008
75. ## Chemistry

What is the pH of a saturated solution of lead(II) hydroxide? The Ksp= 4.0 X 10-15. a) 4.7 b) 7.2 c) 9.0 d) 9.1 e) 9.3 What should I do to solve for this? Thank you

asked by Sheri on April 5, 2012
76. ## Algebra 2

x^4 - x

asked by Arielt -Help now fast due tommorow on July 28, 2010
77. ## Chemistry

What is the pH of a solution with [OH-] = 2.5 x 10-3? I don't even know where to begin with this problem :( You know [OH] + [H+] = 1*10^-14 so solve for [H+], then pH= -log [H+]

asked by KHNJ on February 14, 2007
78. ## algebra 1

I have my solution to this problem but I am not very confident in it being correct. I just want to see if some one else comes up with the same answer. Solve (x^2 - 2x)(x + 3) = -2x(x = 1)

asked by Dippy on March 9, 2009
79. ## college math

solve: (3/x)/1=(7/x-20) i keep getting different answers for this question. the last answer i got was 20 (which would make it not a solution) but im not sure if that is right

asked by monty on November 23, 2009
80. ## pre cal

solve the inequality express your solution in interval notation (x - 4)^2/ (x -6) (x + 6) > 0 Help me!

asked by amy on December 8, 2011
81. ## Algebra help pls

3+6z=13+6z A Z= -5/6 B Z= 2 2/3 c Has infinite solutions D Has no solution How can i solve this idk how to start

asked by Blaw on September 19, 2017
82. ## maths

Solve this equation by completing squares and then check the solution.. x = 21/x-4

asked by Shane on May 20, 2014
83. ## algebra

Solve for x, give the solution in both interval and graph form: | 2x + 5 | ≤ 12

asked by Anonymous on September 27, 2017
84. ## algebra 2

Solve for x, give the solution in both interval and graph form: | 6x – 8 | = 4

asked by Anonymous on September 27, 2017
85. ## Pre-Cal.

Solve the following inequality . Write your solution in interval notations. x+3/x-3

asked by phyllys on December 28, 2012
86. ## algebra

Solve for x, give the solution in both interval and graph form: | 4x - 5 | > 4

asked by Anonymous on September 27, 2017
87. ## Math

Solve and graph the solution set on a number line. |5x + 7| - 2 < 4 -5 -4 -3 -2 -1 0 1 2 3 4

asked by Kevin on March 2, 2010
88. ## algebra

Solve using the addition principle 2¡Á+3¡Ü¡Á+5 The solution set is {¡Á|¡Á¡Ü blank }

asked by Faye on May 18, 2011
89. ## algebra

can someone check my answer please? Solve for indicated letter. b=8c ,for c the solution is c=b/8 ? is this correct?

asked by Anonymous on September 26, 2009
90. ## Math 116 algebra please check

Solve using the multiplication principle. 10x= -90 The solution is x = -9 please check

asked by jay jay on July 16, 2008
91. ## math

Solve the equation and graphing utility to verify your solution

asked by solving equation by graphing on January 1, 2017
92. ## Pre- Algebra

Solve x - 5/9

asked by Kameesha on November 7, 2011
93. ## Algebra 2

solve the inequality. Graph the solution set. 5r + 4 is less than or equal to 5

asked by bubblegum on September 3, 2015
94. ## Algebra help pls

Which ordered pair is a solution of the equation y=4x? A (1,3) B (-1,-4) C (-4,-1) D(1,-4) Can Someone help me solve this pls ?

asked by Blaw on September 19, 2017
95. ## math

solve the equation for x. write the solution set x2-100x=0

asked by aj on May 18, 2011
96. ## hectorr

Solve the fractional equation check yur solution 3[2x-(x+7)]=5(x-3)

asked by math HELP!! on May 27, 2014
97. ## algebra

needing help with is problem solve for x: 3x-2y=-6 here is my solution 3x - 2y = -6 3x = 2y - 6 x= 2y -6/3 x=2/3y-2 yep that's correct.

asked by jessica on April 10, 2007
98. ## Solve the inequality

Solve the inequality. Write the solution in interval notation. (x+14)/(x-8)≥ 1

asked by Audrey on May 2, 2013
99. ## algebra

solve x-4

asked by babygirl on September 7, 2011
100. ## Math 4 (Count Ibilis)

Solve by factoring: One of the solutions to the quadratic equation 2x^2 - 9x – 5 is -1/2. What is the other solution? 2x^2 - 9x – 5 = (2x + 1)(x - 5) So, it's x = 5.

asked by Margie on January 30, 2007