# 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 495
1. ## Chelsea

Solve the equation. (Find only the real solutions. Enter your answers as a comma-separated list.) x + 2 = 38 − (x/2)

asked by Algebra on August 31, 2015
2. ## geometry

I need help on a question that wants me to find x and y on a 45-45-90 triangle they only give me one side wich is three.I already solved for x which is three root two over two...Is that right? I don't know how to solve for y... Please someone help me....:(

asked by ian on January 20, 2013
3. ## language arts

Unscramble letters to find the answer to what's the first thing you should do when you have a big problem to solve. Three words ULARAEPGNYT

asked by alexis on December 10, 2015
4. ## math

two number cubes are rolled. what is the probability of getting a sum less than 5? 68/100 =0.68=68% ?? can you explained how to solve showing steps.

asked by marilyn on December 4, 2016
5. ## Math

Write and solve an equation to find how much water Montana average 3 month temperature is then minnesota

asked by Stella on December 11, 2016
6. ## MATHS

CAN ANY ONE SOLVE THIS QUESTION PLEASE: FIND HCF OF 180,252 AND 324 USING EUCLID'S DIVISION LEMMA?

asked by sandra on May 26, 2012
7. ## Pre-Calculus

If θ represents an angle such that sin2θ = tanθ - cos2θ, then sin θ - cosθ = A. -√2 B. 0 C. 1 D. 2√2 What equation can I use to solve this problem?

asked by Peter on July 31, 2012
8. ## math

Patricia estimated that 439 - 186 would be close to 300. Do you agree? Explain and solve the problem.

asked by sandra on November 17, 2011
9. ## Algebra 2

You have made scores of 81, 76, 82 on Three quizzes. What is the least you can make on this quiz to have an average of at least 80? I tried solving this problem, but them got lost. How do i solve it?

asked by Anonymous on October 19, 2011
10. ## Factoring

(100)d^2-(57.3)d= 0 solve for d. yes...I just can't figure out what number I'd use to factor this and it got bumped to the next page. I thought it was an easy question but... Thanks

asked by ~christina~ on April 14, 2008
11. ## Math

Solve for θ in the equation cos θ = -0.334 when 0º < θ < 180º. Round your answer to the nearest tenth of a degree.

asked by Quinn on November 28, 2018
12. ## math

I have a big question!!! And I reaally need the answer!!! Me + (my crush)= ?

asked by Emily Torres on August 23, 2018
13. ## physics

In a right triangle ABC, C = 90°, a = 21 ft and b = 76 ft. Solve for all the missing parts using the given information. (Round each answer to the nearest whole number.)

asked by erin on August 11, 2010
14. ## Math

can please someone help me to solve this question: 18 MB of data are to be transmitted over a 4 megabits per second connection. How long should the complete transmission take, to the nearest 0.1 s?

asked by Ramond on February 9, 2011
15. ## Math

How would you solve a problem like this with logarithims? I tried to start a couple of different ways but I kept getting stuck. Do you take the logs of both sides right away or do you do something else first? 17c^2/3 = 44

asked by Anonymous on January 15, 2008
16. ## algebra2

please help me do this..im having so much trouble ...i need to solve this problem in quadratic formula... -4t^2-9t-3=0 thank you so much for helping..if u can do this and help me then i can do the rest of my homework....i hope..lol

asked by logan on January 29, 2008
17. ## Math!!!!!!!

How do you solve problems like -1/2+1/3 or -3 1/5+-6 1/2 without a number line? Thank to everyone who helps! I posted this question at 10ish but noone helped so I'm posting it again.

asked by Jessie on October 23, 2012
18. ## 3rd grade math

use the digits 0 2 4 5 6 and 8 to write two money amounts that you can subtract by trading one dime for ten pennies. Then solve

asked by demetrios on January 18, 2011
19. ## Algebra

(2n+1)(2n-1)(n+5) I'm a little confused on how to do this one. Any help would be greatly appreciated!!! Thanks. see the other post. see the other post. Hi Chelsea: You are given three binomials which are to be multiplied. Were you asked to multiply three

asked by Chelsea on July 5, 2007
20. ## science help only have 3 min left

Earth seems to be the only planet in our solar system that can support life. All BUT ONE of these is a reason why life is found only on Earth. That is A) a moderate climate. Reactivate B) the presence of water on Earth. C) it is the perfect distance from

asked by Haley on May 16, 2017
21. ## History

What is Renaissace in Rome? What happened in Rome when itwas Renaissance? Who were the important people in Rome when it was Renaissance? What was the government system at that time? Thank you for using the Jiskha Homework Help Forum. Try the following link

asked by rA on December 13, 2006
22. ## bio

Orange juice is often touted by nutritionists as being an excellent antioxidant. Within an essay response, discuss the following concepts: an antioxidant’s function, free radicals and their effect on the human body, sources of vitamin C, optimal delivery

asked by Dave on May 4, 2012
23. ## microeconomics

The technology is now developing so that road use can be priced by computer. A computer in the surface of the road picks up a signal from your car and automatically charges you for the use of the road. a. How could this technological change contribute to

asked by Kathy on May 26, 2009
24. ## Ed Tech

Before katie turns in the paper she typed she wants a peer to review it and give her feedback. katie uses her all in one printer to scan her edit,prints, and send them to her friend. An all in oneprinter is -Input device -Output device -Data storage device

asked by Elizabeth on September 10, 2015
25. ## Religion,History

What makes up the Hindu religion considering that Hinduism lacks a uniting belief system. Two of the unifying elements of Hinduism are a belief in Brahman and reincarnation. Check these sites for more information. (Broken Link Removed)

asked by jasmine20 on December 21, 2006
26. ## business ethics

How do most U.S manufacturers montor their factories for compilance with corporate codes of conduct? a. by applying an internal audit system b. by using the services of an independent NGO c. by hiring the for-profit services of a consulting or audit firm

asked by katie on August 13, 2010
27. ## biology

Orange juice is often touted by nutritionists as being an excellent antioxidant. Within an essay response, discuss the following concepts: an antioxidant’s function, free radicals and their effect on the human body, sources of vitamin C, optimal delivery

asked by Dave on April 17, 2012
28. ## physic

A 2000 kg car is traveling at 20.0 m/s. Then, it puts on the brakes and comes to a complete stop. The heat generated due to the stopping heats up the brakes. The mass of the brake system is 20.0 kg and it has a specific heat of 0.200 kcal/kg °C. What is

asked by aina on July 23, 2016
29. ## Physics

A wodden block weighing 200 g is attached to a hanging weighing 45 g with a fine thread . The block is placed on a frictionless surface and after passing thrad over a smooth pulley , hanger is allowed to pull the block . Find the acceleration of the system

asked by Muskaan on August 13, 2018
30. ## again english help

Ondaatje’s work in “The English Patient is so beautiful and absolute that every sentence in his book has a sense of power in its meaning. His novel gives us mysterious and memorable tales of his characters’ lives. Instead of presenting the story in

asked by apoorva on August 9, 2006
31. ## calculus

Please help. How do I separate the variables in the following differential equation dy/dx=(2/27)(x-3)then square root (x^2-6x+23)/y where (y>0). Then give general solution in implicit form. Thank you so much if you can help.

asked by paul on May 19, 2011
32. ## Chemistry

A 30 mL sample of 0.150 M KOH is titrated with 0.125 M HClO4 solution. Calculate the pH after the following volumes of acid have been added: 30 mL, 35 mL, 36 mL, 37 mL, and 40 mL.

asked by Melissa on March 8, 2011
33. ## Chemistry

A 30 mL sample of 0.150 M KOH is titrated with 0.125 M HClO4 solution. Calculate the pH after the following volumes of acid have been added: 30 mL, 35 mL, 36 mL, 37 mL, and 40 mL.

asked by Melissa on March 8, 2011
34. ## AP Chemistry

A solution is prepared by mixing 50.0 mL of 0.17 M Pb(NO3)2 with 50.0 mL of 1.6 M KCl. Calculate the concentrations of Pb2+ and Cl - at equilibrium. Ksp for PbCl2(s) is 1.6X 10-5.

asked by Bill on December 4, 2011
35. ## biiochemistry

showing by calculations how would i prepare the following solutions : 200ml stock solution of 1M NaOH (mwt 40g/mol)

asked by ZANELE on February 9, 2011
36. ## Chemistry

given 9.5 g of KBr (molar mass is 119 g/mol) dissolved in water to make a 175 mL solution, what would the molarity be?

asked by Lily on May 24, 2012
37. ## Chem

What experimental difficulty would you encounter if you had neglected to include a drying step before evaporating the ether solution of fluorene?

asked by Jason on November 5, 2008
38. ## chemistry

How do precipitates combine in a solution? Very slowly, if at all. Chemical reactions require that atoms/ions contact each other individually.

asked by Morgan on October 31, 2006
39. ## chemistry

How many grams of Iodine, I2 must be dissolved in725ml of carbon disulfide, CS2 (d=1.261 g/ml), to produce a 0.236m solution?

asked by Ashely on June 28, 2010
40. ## math

Translate the following statement to an inequality. Then, find the solution. Four times the sum of a number and eight is greater than or equal to negative four. n ≥ -9 n ≤ -9 n ≥ -32 n ≤ -32

asked by dean on September 7, 2017
41. ## chemistry

The boiling point of a solution will ______ and the vapor pressure will _______ with a(n)_____ in the amount of dissolved solute.

asked by kendra on July 14, 2011
42. ## Science

in a true solution, the dissolved particles (1)are visible to the eye (2)will settle out on standing (3)are always solids (4)cannot be removed by filtration

asked by lisa on February 8, 2011
43. ## algebra

The maximum speed allowed on Main St is 25mph Define a variable & write and inequality. Also graph the solution.

asked by Cyn on November 5, 2017
44. ## chemistry

what volume of physiological saline solution (0.90% by weight NaCl, in water) would give you a gram of salt when evaporated?

asked by jemmie on January 18, 2011
45. ## CHEM, please help!

What pH buffer solution is needed to give a Ni2+ concentration of 2.5 x 10-3M in equilibrium with solid nickel hydroxide Ni(OH)2? Ksp = 6.0 x 10-16.

asked by Kate on March 18, 2012
46. ## Pharmacy Math

320ml of active ingredient is added to 680ml of an alcohol based solution. What is the final strength (v/v)? ___

asked by Jean on July 30, 2012
47. ## chemistry

What volume of water was added to the 350 mL of NaOH solution? Assume volumes are additive. Answer in units of mL

asked by cheri on September 19, 2012
48. ## Pharmacy Math

320ml of active ingredient is added to 680ml of an alcohol based solution. What is the final strength (v/v)? ___

asked by Betty on July 30, 2012
49. ## Chemistry

If the concentration of a saturated solution of SrCO3 is 0.000040 mol*L^-1, what is the value for the solubility product constant of this salt. How do I start this please

asked by LT on April 14, 2008
50. ## Calculus

Find the particular solution of differential equations that satisfies the initial condition dx/dy=e^(x+y) x(1)=0 I know you have to get all the y and dy on one side and x and dx on the other so you can intagrate and stuff, but im having trouble getting

asked by Arie on May 18, 2016
51. ## chem 101

How much alcohol must be burned to generate 279kj of heat to warm the water as described in problem 3?(from 60 F to 180 F) a. 18.7 g b. 2.9 g c. 1.6 g d. 10.4 g e. 9.3 g the answer is D help with solution?

asked by Anonymous on April 13, 2012
52. ## Chemistry

Please reply as soon as possible, I really need the answer urgently. How many grams of NaOH are required to completely neutralize 100ml of 1M solution of H2SO4?

asked by Lost In Studies on September 28, 2010
53. ## Chemistry

I need to figure out whether NaNO3 is saturated, unsaturated, or supersaturated in a 3 molal solution at 40 degrees Celsius. I am completely stuck right now, and am not sure where to go with this.

asked by anonymous on May 10, 2015
54. ## Chemistry

A handbook gives the aqueous solubility of carbon monoxide at 0 °C and 1 atm CO pressure to be 0.0354 mg CO per mL of solution to obtain 0.100 M CO?

asked by Droop on September 25, 2017
55. ## school math 3rd grader

Meg spent \$3.75 on candy and \$4.89 on toys. How much did she spend in all? Find the solution to your subtraction problem without doing any calculation. Explain.

asked by tom on November 18, 2015
56. ## chemistry

Calculate the number of grams of h2c2o4.2h2o needed to prepare exactly 250mL of a 0.200 N solution of the acid?

asked by Jess on March 16, 2012
57. ## College Chemistry

1.14g of sodium bicarbonate (NaHCO3)is dissolved in 500 mL H2O. What is the Ph of the solution? Assume constant volume.

asked by Elizabeth on November 12, 2010
58. ## Chemistry (urgent)

Calculate the volume of an acidified solution of 0.02M potassium manganate that would be used to oxidize 100cm^3 of magnesium etanedioate.

asked by Edmund on October 22, 2014
59. ## Chem

in a 0.01 M solution of 1.4 butanedicarboxylic acid, (Ka1=2.9x10^-5, Ka2=5.3x10^-6), which species is present in the lowest concentration?

asked by Chemistry on March 19, 2013
60. ## Chemistry

What mass of salt(NaCl)should you add to 1.20 L of water in an ice cream maker to make a solution that freezes at -10.4∘C?

asked by Anna on February 9, 2017
61. ## Chemistry

What mass of salt(NaCl)should you add to 1.20 L of water in an ice cream maker to make a solution that freezes at -10.4∘C?

asked by Anna on February 8, 2017
62. ## Physical chemistry

If a sample of AgCL is shaken with excess water and concentrated solution of sodium chloride, how would the equilibrium be affected

asked by Novia on November 20, 2012
63. ## Chemistry

In manufacturing a fruit drink, citric acid is added to water in the amount of 0.1 mol/L. What is the pH of the resulting  solution?

asked by Laura on April 7, 2010
64. ## Inorganic chemistry

write a balanced half-reaction for the reduction of permanganate ion, Mn04, to Mn02 in a basic solution

asked by Steve on April 11, 2009
65. ## chemistry

how many grans of Ca(OH) are needed to prepare 800.0 ml solution of 0.15M concentration? molar mass of Ca(OH) is 74g/mole

asked by faye on November 26, 2010
66. ## Ap Chemistry

Can anyone help me with this question How much NaCl should be added to 0.35 L of a 0.15 M solution of AgNO3 so that it reacts completely with the silver to form AgCl(s)? A. 8.8 g B. 0.0525 g C. 0.89 mg D. 3.07 g

asked by William on April 12, 2018
67. ## chemistry

how many grams of hydrogen peroxide (H2O2) must be added to 1500 ml of water to produce a concentration of 1.33 m (molal solution)

asked by Anonymous on April 19, 2011
68. ## Chemistry

The osmotic pressure (T=25°C) of a saturated solution of CaC03 is 0.0179 atm. Determine the solubility product of the salt

asked by Mousa on July 5, 2012
69. ## Chem

What stoichiometric concentration of the indicated substance is required to obtain an aqueous solution with the pH value shown below? a)aniline, C6H5NH2, for pH= 9.05 b)NH4Cl for pH= 5.22

asked by Ashley on March 2, 2012
70. ## chemistry

What mass in grams of dextrose (C6H12O6) will be required to produce 6.00 L of a 0.15M aqueous solution? Question 5 answers

asked by Seep on December 2, 2011
71. ## Chemistry

Explain how you woud make 200.0 g of a .900 percent by mass solution of salt (NaCl in water)

asked by Jakub on April 16, 2014
72. ## Science(Chemistry)

Explain what would happen when bromine water is added to potassium iodide solution and what is its balanced chemical equation?

asked by Timothy on August 18, 2012
73. ## math

#please people help me the solution of this question# How many degrees does a minute and clock turns through between noon and 1320 hours of the same day?

asked by Anonymous on August 8, 2018
74. ## chemiestry

What is the pH of aqueous solution of KC6H7O2 at 373 molar concentration? A figure for sorbic acid C6H7O2H pKa = 4.77

asked by jehan on December 20, 2017
75. ## Chemistry

the pH of a .050 M ammonium chloride solution was experimentally determined to be 5.45. Write the equation for the chemical reaction that determines the pH

asked by Mark on May 7, 2019
76. ## math

#Please people help me the solution of this question# Ali was born 29th February 1980. How many birthdays he celebrated until 2003?

asked by kelvin on August 8, 2018
77. ## Chem

If not all the alum dissolves in the water before adding the Ba(NO3)2 solution, what effect will this have on the sulfate percent error determination?

asked by Matt on October 12, 2014
78. ## Chemistry

What is the molar concentration of 4% (w/v) CH3COOH? Hence calculate the expected titre of 0.1M NaOH solution when reacting with 5.00mL if vinegar.

asked by Stae on April 18, 2010
79. ## chemistry

What is the limiting reagent in this problem? A total of 40.0 mL of 0.55 M copper (II) sulfate solution is added to a beaker containing 2.02g of zinc.

asked by brianne on March 20, 2013
80. ## Chemistry

How many grames of lithium nitrate LiNO3 (68.9 g/mol) are required to prepare 174.1 mL of a 0.698 MLiNO3 solution ?

asked by Cynthia on February 22, 2012
81. ## Chemistry

How many grams of silver will be produced on the reaction of 50.00g iron metal with an excess of a copper (ii) sulfate solution ?

asked by Maria on March 25, 2013
82. ## Calculus - Differential Equations

Use separation of variables to find the solution to the differential equation: 4 (du/dt) = u^2, subject to the initial condition u(0)=6. So far, I have: 4 du = u^2 dt 4/u^2 du = dt -4/u = t+C I am unsure what to do from this point...

asked by Abby on November 4, 2016
83. ## Chemistry

How could i determine the apparent molal concentration of BaNO3 when the freezing point of the aqueous solution is -2.65 degrees Celcius

asked by Lexi on May 3, 2010
84. ## trig

find, to the nearest minute, the solution set of 1- sin x = 3 cos^2 x over the domain 0 degrees to 360 degres

asked by Clarkney on May 20, 2010
85. ## Math

Analyzing Solution Sets to Linear Equations with the Variable on Both Sides- Infinitely many solutions 5x-2x+7-x=__x__ answers 1-9

asked by Madeline on January 30, 2017
86. ## Ochem

What volume of 6.43% (wt.vol.) NaOCl solution is required to oxidize 221 mg of 9-fluorenol to 9-fluorenone? I'm not to sure of where to start with this problem. Please help!

asked by Jessica on February 1, 2012
87. ## Chemistry

What is the boiling point of a solution that contains 1.20 mole of sodium chloride in 1000 g water? KbH2O = 0.512C/ molal

asked by Cielo on December 31, 2014
88. ## chemistry

Assuming additive volumes, what will be the molarity of the solution that results when 35.5 mL of 2.00 M HNO3 is added to 214.5 mL of water? 0.284 M

asked by krystal on February 22, 2012
89. ## chemistry

calculate the amount of Zn(NO3)2 that needs to be added to 724.5 mLs of water to produce a .295 molar solution.

asked by Anonymous on September 10, 2013
90. ## Chemistry 12

calculate the Ph of a solution composed of 0.75 grams of KOH dissolved in 500ml of water. assume total ionization.

asked by jeremy on June 27, 2014
91. ## Chemistry

Calculate the Ksp Ca(OH)2 25cm3 of a saturated solution required 11.45cm3 of 0.1mol/dm3 HCl for neutralization.

asked by Suha on January 3, 2011
92. ## Chemistry

Write the balanced equation for the neutralization reaction between H3PO4 and NaOH in aqueous solution. Phases are optional.

asked by Dane on February 27, 2016
93. ## Chemistry

How many grams of KNO3 (molar mass = 101.103 g/mol) should be used to make 325.0 ml of 0.070 M solution?

asked by Timothy on November 5, 2012
94. ## physics

formulation of hypothesis for the prepation of a standard solution of oxalic acid with a concentration of 0.05mol.dm3. very desperate

asked by anonymous on March 1, 2011
95. ## math

what is the solution sets of the following a) 2x^2-7x-5 b) 5y^2-16y+3 c) 4y^2+5y-6 d) 10x^2-13x+4 e) 12y^2-11y-5 f) 10c^2-21c+9 g) 3m^2+5m-2 h) 12x^2+19x+5

asked by Mohamed shiko on January 17, 2011
96. ## math

Translate the following statement to an inequality. Then, find the solution. Three times the sum of a number and five is greater than or equal to negative six. n ≥ -7 n ≤ -7 n ≥ -3 n ≤ -3

asked by dean on September 6, 2017
97. ## calculus

Find the solution of the differential equation that satisfies the given initial condition. dp/dt=2 sqrt(pt), P(1)=5 my answer: P=(2/3t^(3/2)+(15sqrt(5)-10)/15)^2 how is it wrong?

asked by kyle on March 20, 2016
98. ## chem

Excess Ag+ is added to 50 mL of NaBr soln and precipitated out 22.8 mg of AgBr. What is the original concentration of Br- ion in the solution in ppm?

asked by janie on October 26, 2010
99. ## math

A student claims that the equation has no solution, since the square root of a negative number does not exist. Why is this argument wrong?

asked by corey on January 5, 2010
100. ## Analytical Chem

If a solution of NaOH is left exposed to room air, what will happen to its pH? What chemical equilibrium is responsible for this effect?

asked by Leul on February 9, 2016