# 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 66
1. ## College Chemistry

1. What is the change in internal energy (in J) of a system that absorbs 0.677 kJ of heat from its surroundings and has 0.438 kcal of work done on it? 2. A 30.5 g sample of an alloy at 94.0°C is placed into 48.7 g water at 20.3°C in an insulated coffee

asked by Nevaeh on October 20, 2010
2. ## Math Grade 5

my daughter is doing homework using greatest common factor, greatest common divisor, and prime factorization. She has this problem: Computers in the research room of the history museum are 30 wide, 30 inches apart and at either end of a row 30 inches from

asked by Darcie on February 16, 2009
3. ## math

my daughter is doing homework using greatest common factor, greatest common divisor, and prime factorization. She has this problem: Computers in the research room of the history museum are 30 wide, 30 inches apart and at either end of a row 30 inches from

asked by Darcie on February 16, 2009
4. ## Math

One of Anne’s most important duties at the clinic is to prepare solutions with the correct amount of anesthetic for animals undergoing surgery. For today’s surgery, she needs 250 milliliters of a 20% solution, but only has a 10% solution and a 60%

asked by Anonymous on November 6, 2017
5. ## College Algebra

A tennis club offers two payment options: Option1: \$35 monthly fee plus \$4/hour for court rental Option 2: No monthly fee but \$6.50/hour for court rental. Let x = hours per month of court rental time. a) Write a mathematical model representing the total

asked by Alicia on November 16, 2007
6. ## biology

another way to afect the enzyme is lowering the pH of the solution. However, lactase is supposed to be able to work in the stomack. Would lowering the pH of the enzyme solution affect the enzyme? Why or why not?

asked by sara on November 11, 2011
7. ## AP Chemistry

An unknown amount of water is mixed with 350 mL of a 6 M solution of NaOH solution. A 75 mL sample of the resulting solution is titrated to neutrality with 52.5 mL of 6 M HCl. Calculate the concentration of the diluted NaOH solution. Answer in units of M I

asked by Anonymous on September 20, 2015
8. ## Chemistry

Mass of an aspirin tablet is 0.42g and contains 77.38% ASA by mass. I dissolved the tablet in hot naOH and cooled the solution with distilled water to the mark of 250 volumetric flask. Then I pipetted 5.0 mL of the solution to the 100 mL volumetric flask

asked by Brissa on April 25, 2007
9. ## Algebra 1A

solve for the indicated letter b=a+d for a= the solution is a= b. is this correct? thanks

asked by Lea on September 26, 2009
10. ## algebra

Solve by completing the square x^2+3/2x=3 What is the solution? x=

asked by Becky on March 11, 2008
11. ## Algebra

15. Solve |3x+1| < -5: a. x < -2 b. -2 < x < 4/3 c. all real numbers d. no solution

asked by Mike on March 11, 2008
12. ## algebra

Solve. 9x^2 + 12x = 32 x2 + (4/3)x - (32/9) = 0 has two solutions: x = -2/3 + √ 4 or x = -2/3 - √ 4 This is the solution I came up with. Is this right?? Please and Thank you.

asked by slomo on February 3, 2015
13. ## algebra

Solve the inequality. Graph the solution. 2|x+1/3|

asked by allexelle on April 10, 2015
14. ## Precalculus

Solve the inequality and sketch the solution: -3≤ 2(x+4)< 14

asked by Trevor on January 3, 2010
15. ## math

Solve the equation and check your solution 2/5+1/y-5=y-7/5y-25.

asked by glen on June 18, 2013
16. ## Math

Solve the equation and check your solution. Thank You 3/v= v/2v+9

asked by Latrisha on May 1, 2010
17. ## Math 116

if I solve this by substitution 8x+7y=-13 x=29-7y I end up with -3.8 But I think there is no solution

asked by Katie A on September 29, 2011
18. ## Math 116 algebra please check

Solve for the indicated letter. e=9f, for f The solution is f = 1/9e Please check this

asked by jay jay on July 16, 2008
19. ## algebra

is this problem NO SOLUTION. Im unable to solve. x(3-x)=x-(x^2-2x+4)

asked by jill on March 15, 2016
20. ## algebra with trig

how do you solve an inequality and graph it's solution?

asked by Anonymous on September 29, 2008
21. ## Math

Solve the follwing Equation (3)/(x+2)+(6)/(x^2+2x)=(3-x)/x I got no solution.

asked by Keonn'a on November 8, 2018
22. ## math

solve using multiplication -6x>1/13 The solution is < -1/78 is this correct?

asked by jason on June 29, 2009
23. ## math

solve 5/8x + 1/16x=7/16+= the solution is x=___

asked by question on July 22, 2009
24. ## Math (pre calculus)

Solve 2^3-x = 5^2x+1 Give an exact solution.

asked by danielle on December 12, 2013
25. ## Algebra

Solve. (7+u)(3u-1)=0 (If there is more than one solution, separate them with commas.)

asked by Adam on February 1, 2011
26. ## algebra 2

Solve the inequality. Graph the Solution. 8|x+3/4|

asked by Kandy on September 2, 2014
27. ## math

solve for the indicated letter. d=6e, for e the solution is e=? i am not sure what they mean. I never learned it.

asked by scooby9132002 on July 2, 2009
28. ## math

solve the following equation for x x-1/x+5=x-4/x+3. the solution is ?. Thank you for helping me, I need it.

asked by Kay on July 2, 2009
29. ## algebra

Solve the inequality graph solution 5r+4

asked by Tammy on February 25, 2014
30. ## algebra

solve each inequality. Graph the solution. 4 < 3x - 5 ¡Ü 7 5 - x ¡Ý 9 or 3x - 4 > 8

asked by dillon on October 23, 2007
31. ## Algebra 1

Solve 2x^2 + 7x = -8 using the Quadratic Formula. A: No solution?

asked by Victoria on May 13, 2014
32. ## Alg1 / 2

solve the equation & check your solution

asked by Math on August 31, 2012
33. ## Trig.

Solve. Check for extraneous solution. 6x= √20+6x

asked by Rach on April 21, 2012
34. ## Math

solve for the indicated letter. z=11-y, for y the solution is y= No idea

asked by scooby9132002 on May 18, 2009
35. ## Algebra

Solve the equation, if possible(answer or no solution); n-10=5/6n-7-1/3n

asked by Anonymous on September 15, 2013
36. ## Algebra

Solve for x using the addition principle. x+10=-8 The solution x=

asked by Lisa on May 13, 2011
37. ## algabra

Solve and graph the solution set.

asked by edie on August 19, 2007
38. ## math

solve each inequality and graph its solution a. 2x> -12 b. y + 5 _>2 c. x\4 _> -1 d.6z-3-5z

asked by kattie on January 4, 2011
39. ## 7th grade math

solve each equation. Check your solution. 1) 7 2 -X = - 3 3 2) 2 1 7c- - = - 3 2

asked by Dingbat on January 9, 2013
40. ## Algebra

What is the solution of -4x +1 > or equal to 7 I get these really confused on how to solve these. Thank you

asked by Randy on October 5, 2010
41. ## math am i right?

Solve (x+18)(x-18)(x+12)>0 Solution set is {x|-8,-12} Is this correct?

asked by Sam on July 9, 2011
42. ## math

solve each inequality and graph its solution a.2x> -12 b.y+5>2 c.x\4 > -1 d. 3(w-2)< -1

asked by kattie on January 4, 2011
43. ## math

Solve using the multiplication principle -7x>1/5 The solution is x/x _ _

asked by lana on May 7, 2010
44. ## algebra

w^2-3w-40=0 how are you supposed to solve this and how do you find the solution for w

asked by jen on July 15, 2010
45. ## Mat 116

Solve using multiple principle. 7x=-56 The solution x= -8 or x= 7(-8)= -56

asked by Robin on April 11, 2010
46. ## Math 116 algebra please check

Solve using the multiplication principle -4x > 1/11 The solution is x

asked by jay jay on July 16, 2008
47. ## Math 116 algebra please check

solve using the multiplication principle. -5/6x = -7/8 Th solution is x=21/20

asked by jay jay on July 16, 2008
48. ## algebra

solve using the addition principle x + 3/13 = 7/13 what is the solution for x

asked by thawk on November 8, 2010
49. ## Algebra

Solve using the multiplication principle. -1/6x= -9/10 The solution is?

asked by Kasey on August 2, 2008
50. ## Math

Hi i'm having trouble with a question. it states During the Summer you take 2 part time jobs. The first job pays \$5 per hour. The 2nd Job pays \$8 per hour. You want to earn at least \$150 a week and work 25 hours or less a week. Write a system of

asked by Alex on March 27, 2013
51. ## Chemistry

a sample of an ionic compound is dissolved in water and the water gets colder. what is acting as the system?what is acting as the surroundings? does the heat flow from the system to the surroundings or from the surroundings to the system? is this

asked by Anonymous on October 9, 2016
52. ## Accounting

formation about the Maxwell Company's inventory of one item during 2010 is given below. Units Unit Cost Beginning Inventory, Jan 1, 2010 80 \$24.00 Purchases: March, 2010 45 24.00 July 2010 75 22.00 Nov. 2010 100 21.00 Ending Inventory, Dec. 31, 2010 55

asked by Lorilori on February 28, 2015
53. ## MATH(PLease Help)

Problem: (y+2)/(y) = 1/(y-5) Directions: Solve the rational expression. Remember that if: a/b = c/d then: a * d = b * c I believe in school they call this the fraction crossover rule or fraction cross rule or something like that. i would work it like a

asked by margie on March 8, 2007
54. ## math

MathMate attempted to help but did not show how the problem is answered. It only confused the problem. Could someone else please help? Thanks. The denominator of a fraction is 4 more than the numerator. If both the denominator and the numerator are

asked by Dylan on March 26, 2011
55. ## Analytical Chemistry

For a triprotic acid H2PO4. Ka1=7.11e-3, Ka2=6.32e-8 and Ka3=7.1e-13. 50mL each of 0.05F CaCl2 and 0.05F phosphoric acid were mixed. Ksp CaHPO4=2.6e-7. a) Would CaHPO4 precipitate when phosphoric acid and calcium chloride were mixed together? b) List all

asked by Mia on March 24, 2015
56. ## Algebra 2 (check)

I have some problems that I've answered and I need someone to check to see if I'm right. Im just posting the questons and my answer,if its wrong I'll post my work,so here it is bear with me please and thank you. 1)name which sets of numbers to which -28

asked by erin on July 21, 2007
57. ## Algebra

Find the discriminant and solutions for the following equations. #1) 9x^2+6x+1=0 #2) -2x^2+3x-2+0 I will be happy to critique your work. what is b^2-4ac? #1) 9^2-4(6)(1)= 81-4(6)= 81-24=57 so then 57 is the solution but what is the discriminant or is 57

asked by Algebra Student on May 15, 2007
58. ## chemistry HELP

laboratoories order hydrochloric acid as a concentrated solution (e.g. 36% W/V). what initial volume of concentrated laboratory hydrochloric acid should be diluted to prepare 5.00L of a 0.12 mol/L solution for an experiment? plz can someone show me how to

asked by TARA on December 9, 2010
59. ## math

Solve by setting up the proper equation to describe the facts given and then carrying out the mathematical calculations to solve for the unknown variable(s). Three batteries are connected in series so that the total voltage is 54 volts. The voltage of the

asked by kenny on July 6, 2012
60. ## Math

Your teacher made the comment that more than 100, 00 ping pong balls would fit in the school gym. develop a calculation method to see if she is right. after taking some measurements, propose the amount the gym would hold. i din't really understand how to

asked by Angelina on April 6, 2015
61. ## Physics

1.A plane traveling at 300.0 km/h attempts to land on a 500 m runway. The plane’s engines and brakes accelerate uniformly at –5.0 m/s2. Will the plane be able to land safely? Show all your work. Include any equations used, the given and unknown. Show

asked by May on October 22, 2014
62. ## physics

if the pulleys are massless and frictionless and the rope is of negligible mass, and aristotle wanted to raise the 332 newton weight to a height of 6 meters. A-find the magnitude of force F he needed to pull on the rope to move the weight upward with a

asked by Jen on May 24, 2012
63. ## Molar Mass & Elements

The weight percent of oxygen in an oxide that has the formula MO2, is 15.2%. What is the molar mass of this compound? What element or elements are possible for M? what can someone give me a push in the right direction???? Let x be the taonic mass of the

asked by nglaze on June 26, 2006
64. ## chemistry

100.0 mL of a dilute NaCl(aq) solution is heated in an open beaker. After 15 minutes the burner is turned off. Which of the following is true of the resulting solution? a more concentrated than the initial solution b less saturated than the initial

asked by jepow on December 7, 2014
65. ## Trigonometry

An airplane with a speed of 485 km/h is traveling with a heading of 83.5°. The wind velocity is 38 km/h in the direction of 191°. Find the ground speed of the airplane. P.S. How do you solve this problem by only using the law of cosine/sine method?

asked by John on March 6, 2018
66. ## chemistry

To a 100.0 mL solution containing 0.0100 M Ba(NO3)2 and 0.0100 M Pb(NO3)2 was added 101.0 mL of 0.0100 M H2SO4 to provide a slight excess of SO42- relative to Ba2+ in the resulting solution. Assuming that: i) H+ does not bind to SO42- ii) ionic strength

asked by john on November 4, 2015
67. ## Chemistry

Please can you assist me with the following problem I am totally muddled - I could swear I've never even heard of science!!! H2SO4(aq) ---> 2H+(aq)+(SO4^2-)(aq) A 0.21 g sample of sulfuric acid is dissolved completely in sufficient water to make 0.25 litre

asked by Billy on February 5, 2007
68. ## physics

for the current density equation (I) , solve for dV/dx when I = 0 I = - [ uz2F[C] dV/dx + uzRT d[C]/dx] According to your equation. dV/dx= uzRT/uz2[C] d[C]/dx I am uncertain what your symbols mean. It's supposed to be the current density equation I think??

asked by Ann on January 23, 2007
69. ## math,bobpursley

Is this the correct way to solve these math problems and are the answers correct. Directions:Solve the following applications. Science. Jose rode his trail bike for 10miles. Two-thirds of the distance was over a mountain trail. How long is tehe mountain

asked by Jasmine20 on December 6, 2006
70. ## Math

You have a total of 21 coins, all nickels and dimes. The total value is \$1.70. Write and solve a system of equations to find the number of dimes d and the number of nickels n that you have. I already wrote the equations: n+d=21 and 10d+5n=1.70. But I don't

asked by Angie on April 20, 2009
71. ## math

system of equations can result in 3 possibilities: consistent, inconsistent, and dependent. Discuss each of these types of solution that can be generated, and describe the graph of each possibility.

asked by tammy on March 13, 2011
72. ## SAT math

I've really been stuck on these questions: 1. If ( x + 2 y )= -4 and am = 6, then 2amx + 4amy = ____ ? 2. The integers x and y are such that x > y > 0 and x 2 - y 2 = 31. If x – y = 1, what is the value of x + y ? 3. What is the value of a that will make

asked by mysterychicken on May 31, 2013
73. ## Chemistry

How can i explain the key features of the periodic table relate to the conclusions after a titration experiment The experiment was the preperation of a standard solution of sodium carbonate and titration for the equation between hydrchloric acid and sodium

asked by Paul on October 11, 2010
74. ## math

What three letters do you think are used most frequently in the English language? Show results and method of recording. i would say the words: the and a I hope this gets you started. E is the most frequently used letter in the English language.

asked by jenny on November 14, 2006
75. ## MATH

Sarah and Joe are seeking to join a gym. Sarah saw on television that Great Gym is offering membership at \$19.50 per month, plus a one-time registration fee of \$59. Joe plans to join Wacky Workout World because Wacky Workout World only charges \$9.50 per

asked by abdullatif on September 16, 2016
76. ## MATH Fractions

Taylor baked a cake to serve after dinner. Suppose she cut the cake into 8 equal size pieces and 6 people ate all the pieces. Explain how they could have divided the pieces so that everyone ate the same amount of cake. You make show your work in a drawing.

asked by Camille on January 16, 2014
77. ## Calculus

Hello, I really need help on these two homework problem. >< In problem #1, I believe it is related to the exponential functions and their derivatives section...in Calculus II? So, surely there should be a ln in the solution as well? I would like a step by

asked by Aria on January 31, 2015
78. ## Math

if a bullet travels at 645.0m/s, what is its speed in miles per hour? can you please show me how to solve this?

asked by Alex on September 10, 2015
79. ## Algebra

Solve for X.... [x/(x+314)]*100 = 42 I don't think I got the right answer. Can you possibly show the steps.

asked by chevy on February 25, 2014
80. ## Math

show step solve the Sturm Liouville problem Y"+hY=0, NB: h means lambda y(0)+y'(0)=0 y(1)+3y'(1)=0

asked by Luis on February 7, 2019
81. ## 8th Grade Math

The value of y varies directly with x. When y = -12 1/2, x = 50. What is the value of y when x is 11 3/4, rounded to the nearest hundredths? Can someone please show me how to solve this problem?

asked by Stephon on October 12, 2016
82. ## algebra

Our take out dinner was \$74.95 but we got 20% off because we picked it up. What did our meal end up costing us? i need to show steps on how to solve this

asked by Anonymous on May 24, 2011
83. ## algebra

I am stumped!!! quadratic equation solve for x: xsq+16x+4=0 please show the steps

asked by Terri on March 18, 2010
84. ## Math

I need to find what the total commission of 14% on a \$3000 sale. Can u please show in detail how to solve this. Please and thank u. :)

asked by Bobby on April 28, 2015
85. ## Math

What is the simplified form of this expression? m^9t^-10/m^-4t^-5 m^13/t^15 m^5t^5 m^13/t^5 m^-13t^-15 I think it's the third, but I'm not sure if that's correct. I would appreciate if someone could show me how to solve it if it's incorrect.

asked by Leah on February 10, 2016
86. ## algebra

Show all steps solve the problem evaluate the expression for given value of variable|-4b-8|+|-1=b2|+2b3:b=-2

asked by Molly on February 19, 2014
87. ## Math

What is the simplified form of this expression? m^9t^-10/m^-4t^-5 m^13/t^15 m^5t^5 m^13/t^5 m^-13t^-15 I think it's the third, but I'm not sure if that's correct. I would appreciate if someone could show me how to solve it if it's incorrect.

asked by Leah on February 9, 2016
88. ## algebra1

I need some help in sovling this problem. x+3y=9 show me how to solve for y. subtract x from each side. Then, divdide both sides by 3

asked by mesha on March 23, 2007
89. ## Math

I can't figure any of these problems out any help would be nice peace. Show all steps used to solve the problem. 1.5n + 6 = -4 3.b/-3+5=7 4.17-x/4=-10 5.If 3a - 9 = 6, what is the value of 4a - 1? 6.

asked by Nick on May 21, 2009
90. ## algebra 1

Jaun drives to work. he averages 22mph, he returnes home averaging 32mph. total travel time is 2.25 hours. a. define a variable for the time Jaun takes to travel to work. write an exprension for the time it takes to return home. b. write and solve an

asked by skot on September 17, 2007
91. ## College Physics (repost)

A 4.1 kg block is attached to a spring with a force constant of 550 N/m , as shown in the figure. Find the work done by the spring on the block as the block moves from A to B along paths 1 and 2. W=? How do your results depend on the mass of the block?

asked by Jenna on October 12, 2009
92. ## Physics

A 4.1 kg block is attached to a spring with a force constant of 550 N/m , as shown in the figure. Find the work done by the spring on the block as the block moves from A to B along paths 1 and 2. W=? How do your results depend on the mass of the block?

asked by Jenna on October 12, 2009
93. ## Psychology

You ave decided to conduct a survey on whether a given political candidate will be popular with Latino voters.What is an advantage of the survey method?What is a disadvantage of the survey method?

asked by Gwendolyn Towns on October 28, 2010
94. ## writing or computer

What is the appropriate citation method for your major or course of study? What have you learned about that citation methodology from Lesson Three of this course? Do you think you'll be able to use this citation method effectively to avoid plagiarism?

asked by jill on May 7, 2015
95. ## statistics

sat scores around the nation tend to have a mean score around 500, a standard deviation of about 100 points and are approximately normal distribution. a person who scores 600 on the sat has approximately what percentile rank within the population. show all

asked by please help in panic mode-mary on October 15, 2010
96. ## Math

A bushel is a unit of volume often used to measure dry, agriculture commodities, and the one bushel is approximately 32L. A 1:50 scale model of a grain bin is capable of holding 0.112 bushels. How many bushels can the full-size bin hold? Ans: 14 000

asked by Shak on April 28, 2017
97. ## MATH,CORRECTION

Directions solve each of the following problems. Besure to show the equation used for the solution. In a town election, the winning candidate had 220 more votes than the loser. If 810 votes were cast in all, how many votes did each candidate received?

asked by jasmine20 on February 5, 2007
98. ## Chemistry

You have 150 ml of a solution of benzoic acid in water estimated to contain about 5 g of acid. The distribution coefficient of benzoic acid in benzene and water is approx 10. Calculate the amount of acid that would be left in the water solution after three

asked by Nat on November 22, 2010
99. ## Chemistry

You have 150 ml of a solution of benzoic acid in water estimated to contain about 5 g of acid. The distribution coefficient of benzoic acid in benzene and water is approx 10. Calculate the amount of acid that would be left in the water solution after three

asked by Nat on November 22, 2010
100. ## Algebra

Divide... 1. x^3+2x^2+x+12/x+3 2. 45a^6b^10/5a^3b^2 Note that x^3+2x^2+x+12 is zero for x = -3, therefore (x^3+2x^2+x+12)/(x+3) has no remainder. You can divide using long division, but this is not the preferred method if you are doing the calculation by

asked by Tomika on June 26, 2007