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 32
1. math

Find the perimeter and area of a right triangle if one leg measures 9 cm and the other leg measures 40 cm. Students must show all work step by step to receive full credit for the problem. Include correct units with your solution.

asked by joetta on October 9, 2011

How do i solve inequalitites with three variables. I still can't figure it outplease help. x+y=1 y-z=-3 2x+3y+z=1 THE ANSWERS ARE X=3,Y=-2,Z=1 i KNOW THE ANSWERS I JUST DON'T KNOW HOW THE BOOK GOT THE ANSWERS . i 'VE TRIED MANY DIFFERENT WAYS AND I STILL

asked by Jasmine202005 on October 22, 2006
3. chemistry

A. Strong Base 1.) What is the concentration of a solution of KOH for which the pH is 11.89? 2.) What is the pH of a 0.011M solution of Ca(OH)2? B. Weak Acid 1.) The pH of a 0.060M weak monoprotic acid HA is 3.44. Calculate the Ka of the acid. 2.) The pH

asked by jaycab on January 20, 2011

The roadrunner bird can run 14 times miles per hour. That's 7 times faster than an ostrich can walk. How fast does an ostrich walk? 7 X ?= 14 I would write the equation like this. Not sure my 8 year old would be able to do this. She knows that 7x 2 or

asked by Lisa M. on October 5, 2015
5. Algebra

How do I solve this? The perimeter of a rectangular writing pad is 28 inches. The length is 1 inch less than twice the width. Find the width. Show all work! Translate your English into Math or L = 2W - 1 2L + 2W = 28 2(2W-1) + 2L = 28 I am sure you can

asked by Palace on March 2, 2007
6. Math

The sheet is titled Solving Inequalities. I need to solve this question by equivalent equations and show my steps. So, how do I solve 6x

asked by Tyler on April 9, 2008
7. chemistry

Please help?! if 600 mL of a 0.04M KCl solution is mixed with 50mL of a 0.03M Na2SO4 solution, will a precipitate be formed? Explain your reasoning and/or show all calculations?

asked by ryan on February 1, 2015
8. Chemistry

Refer to the calibration curve shown in the experiment. If the absorbance of the solution is 0.400, what is the concentration of the iron in that solution? Show or explain how you arrived at your answer.

asked by Elly on June 20, 2011
9. Chemistry #4

What is the concentration of a solution formed by dissolving 10.0g of ammonium acetate in enough water to form 150.0mL of solution? Could someone please explain and show me how to do this? I have the answer= .865M But I am not sure exactly how?!

asked by Chelsea on December 9, 2013
10. Math

What must be true about the solution to this system of equations? x+4y+9z = -96 -2y+9z = -47 z = -7 a) The solution will describe the intersection point(s) of the 3 graphs. b) The value of z must be -7. c) The solutions will have values for x, y, and z. d)

asked by David on June 9, 2016
11. Chemistry

The of hydroxylamine, , is . A buffer solution is prepared by mixing 120 of a 0.34 hydroxylamine solution with 60 of a 0.25 solution.Solve for the PH

asked by Veronica on April 19, 2013
12. Chemistry

This is for oxidation numbers. I need to know how to show my work. Ex: for NaClO, I have to find the oxidation number for Cl I showed my work. NaClO +1+x+(-2)=0 +1+x-2=0 x-2=-1 x=-1+2 x=+1 Therefore, the oxidation number for chlorine in NaClO is +1. Cl^- I

asked by Alex on February 13, 2008
13. math

2.)If f(x)=3x,g(x)=x-3,and h(x)= the square root of x, find (fogox)(X). I really didn't get this will someone please show me how to do it? This I what I did to solve for it: 3(x-3) 3(he square root of 25-3 3(5-3) 15-9=6 Ok here is another way I solved for

asked by Leo on April 6, 2013
14. math

2.)If f(x)=3x,g(x)=x-3,and h(x)= the square root of x, find (fogox)(X). I really didn't get this will someone please show me how to do it? This I what I did to solve for it: 3(x-3) 3(he square root of 25-3 3(5-3) 15-9=6 Ok here is another way I solved for

asked by Leo on April 6, 2013
15. Chemistry

"Determine the volume of a 0.925M K2Cr2O7 solution required to completely react with 5.28g of Cu." My attempted method for solving was to convert the 5.28g of Cu to moles, find moles of K2Cr2O7 using the mole to mole ratio, and then use M=mol/L to solve

asked by Jamie on March 26, 2014
16. Chemistry

"Determine the volume of a 0.925M K2Cr2O7 solution required to completely react with 5.28g of Cu." My attempted method for solving was to convert the 5.28g of Cu to moles, find moles of K2Cr2O7 using the mole to mole ratio, and then use M=mol/L to solve

asked by Jamie on March 26, 2014

Describe the linear programming situation for this system of inequalities where you are asked to find the maximum value of f(x,y)=x+y. Answer: an optimal solution 2)Describe the linear programming situation for this system of inequalities: Answer: an

asked by Lucy on August 30, 2008

Describe the linear programming situation for this system of inequalities where you are asked to find the maximum value of f(x,y)=x+y. Answer: an optimal solution 2)Describe the linear programming situation for this system of inequalities: Answer: an

asked by Lucy on August 31, 2008

Describe the linear programming situation for this system of inequalities where you are asked to find the maximum value of f(x,y)=x+y. Answer: an optimal solution 2)Describe the linear programming situation for this system of inequalities: Answer: an

asked by Lucy on August 23, 2008
20. Algebra

Student tickets to the Homecoming game cost \$5 each. General admission tickets cost \$8 each. So far, 150 tickets have been sold. \$900 has been collected. A. Write a system of equations for this model in standard form. 8G = General Admissions: 50 sold 5S =

asked by Anonymous on June 2, 2017
21. chemistry - titration

Show that for the titration of a weak acid, HA, with NaOH solution, at half-titer, pH = pKa. Please explain your answer. Thank you. HA + NaOH ==> NaA + HOH Ka for HA = (H^+)(A^-)/(HA) and solve for H^+. (H^+) = Ka*[(HA)/(A^-) When HA is half neutralized,

asked by phil on August 5, 2007
22. Chemistry

two solutions are prepared using the same solute solution a: 0.27g of the solute disolves in 27.4g of t-butanol solution b: 0.23g of the solute disolves in 24.8g of cyclohexane which solution has the greatest freesing point change? show calculations and

asked by Robin on February 18, 2013
23. Chemistry

two solutions are prepared using the same solute solution a: 0.27g of the solute disolves in 27.4g of t-butanol solution b: 0.23g of the solute disolves in 24.8g of cyclohexane which solution has the greatest freesing point change? show calculations and

asked by Robin on February 18, 2013
24. Algebra 1

Which cannot describe a system of linear equations? a) no solution b) exactly two solutions c) infinite solutions**** d) exactly one solution To be honest I think the answer is C. Please Help!

asked by In Need Of Help on December 12, 2017
25. Physics

Ok I asked this question before A lbock is given an intial speed of 4.0 s^-1 m up the 22 degree plane How far up the plane will it go ok I got this to be something like 2.2 about i understand this i need help on this how much time elapses before it returns

asked by Physics on July 11, 2009
26. linear systems

This system has one solution. y=8x−14 y=x^2+4x−10 What is the y-coordinate of the solution?

asked by Monika on April 9, 2018
27. Algebra II

What is the solution of the system of equations? {-3x - 4y - 3z = -7 {2x - 6y + 2z = 3 {5x - 2y + 5z = 9 A. (5,-2,7) B. (-5,2,7) C.(5,2,-7) D. No solution

28. AP Physics

Hello given that I person 65 kg takes 4.5 s to climb a flight of stairs that is 5.5 m my question is well I was asked to solve for the work and W=fd and in this case f is equal to the normal force correct? Just take the opposite of mg??????? Also I'm asked

asked by AP Physics on June 16, 2009
29. Computers

Your sister owns a small clothing store. During a conversation at a family dinner, she mentions her frustration with having to manually track and reorder high demand items. She would like an automated system but has a very small budget. Write a 4-5 page

asked by Kelon on July 15, 2012
30. Algebra

Suppose that x liters of 40% acid solution are mixed with y liters of a 43% solution to obtain 100 L of a 41% solution. One equation in a system for solving this problem is x + y = 100. What is the other equation?

asked by Jon on March 5, 2013

1) You are going to make 1800ml of a 25uM solution using a compound whose MW= 60.06 Daltons. How many grams do you need of this compound? Give your answer with four decimal places. 2) You are going to make 300ml of a 75mM solution using a compound whose

asked by Tenshi on May 26, 2016

1) You are going to make 1800ml of a 25uM solution using a compound whose MW= 60.06 Daltons. How many grams do you need of this compound? Give your answer with four decimal places. 2) You are going to make 300ml of a 75mM solution using a compound whose

asked by Tenshi on May 26, 2016
33. Chemistry

A 0.10 M solution of a weak monoprotic acid has a hydronium-ion concentration of 5.0 ´ 10-4 M. What is the equilibrium constant, Ka, for this acid? a. 5.0 ´ 10-2 b. 5.0 ´ 10-3 c. 2.5 ´ 10-4 d. 2.5 ´ 10-5 e. 2.5 ´ 10-6 2. (Points: 1) What is the

asked by write2khin on May 13, 2010
34. math

A 12 qrt. cooling system is checked and found to be filled with a solution that is 40 % antifreeze. The desired strength of the solution is 60% antifreeze. how many quarts of solution need to be drained and replaced with pure antifreeze to reach the

asked by melody on August 31, 2014
35. finance

19. Temple, Inc. has sales of \$329,000, cost of goods sold of \$204,000, depreciation of \$5,900, and interest expense of \$15,100. The tax rate is 34 percent. What is the times interest earned ratio? (Please calculate the arithmetic solution and show your

asked by Vanessa on January 12, 2012
36. finance

19. Temple, Inc. has sales of \$329,000, cost of goods sold of \$204,000, depreciation of \$5,900, and interest expense of \$15,100. The tax rate is 34 percent. What is the times interest earned ratio? (Please calculate the arithmetic solution and show your

asked by Vanessa on January 11, 2012
37. finance

19. Temple, Inc. has sales of \$329,000, cost of goods sold of \$204,000, depreciation of \$5,900, and interest expense of \$15,100. The tax rate is 34 percent. What is the times interest earned ratio? (Please calculate the arithmetic solution and show your

asked by Vanessa on January 12, 2012
38. finance

19. Temple, Inc. has sales of \$329,000, cost of goods sold of \$204,000, depreciation of \$5,900, and interest expense of \$15,100. The tax rate is 34 percent. What is the times interest earned ratio? (Please calculate the arithmetic solution and show your

asked by Vanessa on January 12, 2012
39. Finance

19. Temple, Inc. has sales of \$329,000, cost of goods sold of \$204,000, depreciation of \$5,900, and interest expense of \$15,100. The tax rate is 34 percent. What is the times interest earned ratio? (Please calculate the arithmetic solution and show your

asked by Vanessa on January 13, 2012
40. Math grd 12

You are setting a system programing codes for a universal TV remote control. Each code will have five digits and cannot include a 0 or repeat any digits. How many codes a)do not contain a 7? b)have 3 as the third digit, and 5 as the fifth digit c)begin

asked by Celina on November 21, 2010
41. Algebra 1

Use any method to solve the equation. If necessary, round to the nearest hundredth. 11x2 = 8

asked by BigSlime on December 10, 2018
42. Math

Can someone help me solve the following problems using the substituion method? I need to find the ordered pairs and I do not get it.... Here they are 1) 6m+n=47 m-4n=12 2) 6x+4y=-10 -7x+y=57 3) 5x+7y=43 -4x+y=25

asked by Kristin on March 13, 2010
43. MATH

What is the p.o.i for these set of equations (the substitution method) 2x+y=6 3x+2y=6 i tried to solve this many times but i keep getting different answers. What does x= and what does y=?

asked by PLZ HELP ME on February 14, 2016
44. Math

Solve the set of linear equations by the matrix method : a+3b+2c=3 , 2a-b-3c= -8, 5a+2b+c=9. Sove for a

asked by Ugo on October 11, 2013
45. algebra 1

Solve the following systems of linear equations using algebraic method. 1)3y=11-2x 3x=y-11 2)8x-6y=14 12x-9y=18

asked by Janet on October 31, 2012
46. math/algebra

solve by additon method, tell whether the equation is dependent,independent, or consistent. 1. x-y=3 -6x=6y=17 2. 3/7=5/9=27 1/9 = 2/7 =7

asked by ann on April 5, 2010
47. college

Solve the inequality using a sign graph (test point method) x^3-x^2-4x+4

asked by Sierra on March 17, 2010

using the half angle method solve the triangle for whick the given parts are a=27 b=21 and c=24

asked by sam on April 14, 2010
49. college Algebra

asked by Tonia on April 21, 2010
50. school of science and tech

Solve the set of linear equations by the matrix method : a+3b+2c=3 , 2a-b-3c= -8, 5a+2b+c=9. Sove for c 3

asked by Anonymous on February 26, 2015
51. math

solve using any appropriate method 0.05x+0.25y=99 0.15x+0.05y=108

asked by Keya on August 10, 2014
52. Math

Solve by using the substitution method. (Please keep fractions as they are, don't convert to decimal.) y= 1/7x + 3 x - 7y= -4

asked by Neil on October 3, 2012
53. math

Solve the set of linear equations by the matrix method:a+3b+2c=3,2a-b-3c=-8,5a+2b+c=9 sove for a

asked by kay on February 9, 2014
54. Math

Solve the following l.p.p using simplex method Maximum z=10x+20y Subject to 3x+5y

asked by Akansha on July 27, 2019
55. Math

Solve by using the subatitution method. (Please keep fractions as they are, don't convert to decimal.) 1. y= -3x - 1 2x - 3y= -8 2. 1 + 3y= 10 5x + 2y= 6 3. 2x - 6y= -2 x= 3y - 1 4. y= 1/7x + 3 x - 7y= -4

asked by Neil on October 3, 2012
56. physical chemistry

asked by bun on June 4, 2011
57. math

solve using the substitution method....(solutions must be in ordered pairs form) 9m+n=24 m-8n=27

asked by Michelle on July 12, 2010
58. algebra

I am having a hard time - please guide me to solve by the substitution method. 5m + n = 36 m -7n = 36 A big ty:)

asked by maryk on September 4, 2009
59. algebra

Solve by the linear combination method (with or without multiplication). x + y = 50 0.05x + 0.06y = 2.8

asked by geddy on December 16, 2010
60. statistics

Use the list and calculation method to answer the following questions. Show your work at each step. 4. You draw three cards (with replacement) from a standard deck of cards. What is the probability that a. exactly one will be red: .125 + .125 + .125 = .375

asked by Lynn on June 7, 2013
61. MAT 116

The perimeter of a rectangle is 28 ft. The length is 10 ft longer than the width. Find the dimensions. Write a system of linear equations and solve the resulting system. Let x be the length and y be the width.

asked by Samantha on November 11, 2012
62. a;gebra

The perimeter of a rectangle is 34 ft. The length is 1 ft longer than the width. Find the dimensions. Write a system of linear equation and solve the resulting system. Let x be the length and y be the width. 2x+2y=

asked by Anonymous on November 6, 2012
63. Algebra

Write a system of equations to model the problem and solve the system: Benjamin has nickels and dimes and his toy bank he has a total of 45 coins the total value of \$3.60. How many coins of each kind does he have?

asked by Brianna on November 27, 2014
64. Algebra

Write a system of equations to model the problem and solve the system: Benjamin has nickels and dimes and his toy bank he has a total of 45 coins the total value of \$3.60. How many coins of each kind does he have?

asked by Brianna on November 26, 2014
65. Systen of Equalities

Which term best describes the solution of the situation represented by the system of inequalities? (Assume that x >= 0 and y >= 0.) x + 2y

asked by Janis on September 25, 2010
66. Algebra2

Find the polynomials roots to each of the following problems: #1) x^2+3x+1 #2) x^2+4x+3=0 #3) -2x^2+4x-5 #3 is not an equation. Dod you omit "= 0" at the end? #2 can be factored into (x+1)(x+3) = 0, so the roots are x=-1 and -3. #1 Use the quadratic

asked by Haylee on May 13, 2007
67. Math

Hello, I need a little assistance with showing my work on this question. The equation is -4 7/8 x 2/3. I have to explain how this person is wrong then show the work the correct way. Okay so the person's work is written as, "-4 7/8 x 2/3 = -4 14/24 = -4

asked by @LittleMsAmelia on October 4, 2017
68. Math

Larry mows the same-sized lawns in his neighborhood each weekend during the summer. Part A Each time Larry mows a lawn he uses 1/6 of a gallon of gasoline. If he has 2/3 of a gallon of gasoline, how many lawns can he mow before he needs to buy more

asked by Anonymous on March 16, 2015
69. inforrmation tech/marketing

hi i just made this paper about information technology on business and marketing, im not really good at it so please check my work and maybe revise alittle thanks so much :) need it later hehe :D thanks As industry and commerce have increased their use of

asked by star sorbet on July 26, 2011
70. Chem31

Using the systematic method and information in the Appendices F and J (note that log value is given in Appendix J), determine [SCN-], [Hg2+], and [HgSCN+] at equilibrium when Hg(SCN)2(s) is dissolved in water. Be sure to show all steps using the systematic

asked by Anonymous on November 4, 2014
71. Health care

I need orginal work on this question:• What is one strength you see in the current U.S. health care system? What is one weakness you see? List and describe one of the challenges facing the U.S. health care system.

asked by david d on December 9, 2010
72. anthropology

2.As an anthropologist you are interested in the dynamics of a Matrilineal society. What characteristics would you identify as unique within this kinship system from your own? 3.Why do kinship systems work? Where, if any, would you find a working kinship

asked by jimmy on January 30, 2015
73. Science

In a heat engine, if 700 J of heat enters the system, and the piston does 400 J of work, what is the final internal (thermal) energy of the system if the initial energy is 1,200?

asked by Anonymous on March 8, 2017
74. Science

In a heat engine, if 700 J of heat enters the system, and the piston does 400 J of work, what is the final internal (thermal) energy of the system if the initial energy is 1,200 J?

asked by Ivan on May 2, 2016
75. Physics

Heat of 30 kcal is supplied to a system and 4200 J of external work is done on the system so that its volume decreases at constant pressure. What is the change in its internal energy ? (J=4200 J/kcal)

asked by Chinagodaba on October 5, 2018
76. Math

The perimeter of a rectangle is 42ft. The length is 7ft. longer than the width. Find the dimensions. Write a system of linear equations and solve the resulting system. Let X be the length, and Y be the width.

asked by Denise on August 5, 2013
77. math 209

The perimeter of a rectangle is 44ft the length is 4ft longer than the width. Find the demensions. Write a system of linear equations and solve the resulting system. Let x be the length and y be the width.

asked by chris on July 17, 2011
78. Math

The perimeter of a rectangle is 36ft. the length is 10ft. 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
79. Algebra - solving linear equations w/ substitution

The question in the book reads: "Suppose you try to solve a system of linear equations using substitution and get this result. How many solutions does each system have?" 1)x=-2 2)y=12 3)6=x 4)-8=-8 5)7=y 6)5=3 I understand #3 and #6, but I do not

asked by Samantha on March 19, 2007
80. Chemistry

What is the molality of a solution of water and KCl if the boiling point of the solution is 103.07°C? (K subscript b equals 0.512 degrees C/m solution; KCl is an ionic compound right parenthesis A: .300 B: .600 C: 3.00 D: 6.00 I'm really confused as to

asked by Emily on February 10, 2017
81. Physics

two blocks are connected by a light rope over a pulley fixed at the edge of a table such that bloc A, 16kg is a the table top and block B, 8kg is hanging by the edge. block A is acted upon by a mass of 200N acting towards the center of table surface. the

asked by ashton on April 8, 2013
82. Chemistry

How would you prepare 2.5 L of a 0.05 M solution of iron (III) chloride using iron (III) chloride hexahydrate Since 1 mol iron(III)chloride hexahydrate contains 1 mol iron(III) chloride, use the molar mass of the hexahydrate. M x L = grams/molar mass Solve

asked by MEl on May 2, 2007
83. Chemistry 12

4. a. Using Le Chatelier's principle, what effect will an increase of temperature have on the following system? H2O(l) + 57 kJ ↔ H+(aq) + OH-(aq) b. What is the expression for the constant for this reaction? c. What effect will an increase in temperature

asked by Sareena on May 22, 2011
84. math

Please show all of your work in the space below. Please present and organized and complete solution. A garden will be made up of a parallelogram, a rectangle and a triangle. The garden must have an area of 500m square. Draw two possible gardens. Determine

asked by jhon on November 22, 2013
85. Physics

If 500 J of work are required to carry a charged particle between two points with a potential difference of 40V, the magnitude of the charge on the particle is: a) 0.040 C b) 12.5 C c) 20C D) cannot be computed unless the path is give e) none of these My

asked by susane on March 12, 2007
86. Physics

Cn u plz gv explaination 2 d solutions steps by steps briefly? Cz i really dnt understand hw 2 apply d formula wen i revise it nw. [g=10 ms^-2 ] Two particles P & Q, of masses 0.2 kg & m kg respectively, are attached to the ends of a light inextensible

asked by LingSpirit on September 29, 2008
87. physics

What is the work done by a car's braking system when it slows the 1500-kg car from an initial speed of 96 km/h down to 56 km/h in a distance of 55 m? I have tried to work this one and can't seem to get the answer.

asked by merri on February 13, 2011
88. accounting

Hanson Company uses the weighted-average method in its process costing system. The first processing department, the Welding Department, started the month with 17,000 units in its beginning work in process inventory that were 60% complete with respect to

asked by anonymous on September 21, 2011
89. algebra

Solve the system by graphing. x + y = 4 –x + y = 2 confused where do i start do i need to solve for x and find points I'll bet that after doing a few like this you would be able to do this one in your head. just add then up. The x's will cancel and you

asked by TAMMY on April 27, 2007
90. chemistry

Assuming all volume measurements are made at the same temperature and pressure, how many liters of carbon dioxide gas can be produced when 12.8 liters of oxygen gas react with excess carbon monoxide? Show all of the work used to solve this problem.

asked by sarena on December 19, 2011
91. algebra

_______________________________________ MATH133 Unit 1 Individual Project 2 A 1) The following graph shows the depreciation for the corporate airplane from 2006 to 2009. The plane was purchased new in 2006; therefore, x = 0 represents the year 2006. X –

asked by Michelle on October 10, 2011
92. Science

Which of the following body systems has a component that stops functioning and leads to diabetes? A) endocrine system B) digestive system C) circulatory system D) nervous system A

asked by Anonymous on February 20, 2014
93. Chemistry

Please sir solve this... 6.3 gm of oxalic acid (eq. Wt.=63) is dissolved in 500 ml solution what will be the normality of the solution?

94. algebra

Solve the inequality graph the solution set 26+6b>2(3b+4) answers are all real numbers, b1 1/2,, no solution

asked by toby on February 22, 2014
95. algebra

Solve the inequality graph the solution set 26+6b>2(3b+4) answers are all real numbers, b1 1/2,, no solution

asked by toby on February 22, 2014
96. algebra

Solve the inequality graph the solution set 26+6b>2(3b+4) answers are. All real numbers, b11/2, no solution thanks

asked by Lucky on February 23, 2014
97. MATH HEPL

solve (+14)(x-17)(x+6)>0 I have a solution for x>17 but the answer on my paper asks for a solution set {xline x } help how do I write this

asked by Allison A on November 28, 2011
98. Alg II

When you are solving a matix equation and the determinant of your coefficient matrix is zero, how can you determine when it is a no solution versus an infinitely many solution? nvm i figured it out. you have to determine whether the system is consist or

asked by Brenda on May 10, 2007
99. math

x+y+5z=18 x+y+7z=26 x-4y-7y=-35 its a solve a 3 equation solve the system

asked by ann on September 11, 2012
100. pre algebra

Check whether (-4, -12) is a solution of the system of equations. y = 6x + 12 2x - y = 4 When the graphs of two equations are parallel, there are infinitely many solutions. y = x + 4 y = 3x solution: ( , )

asked by berta on April 11, 2014