# 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 719
1. ## Math

Determine the number of triangles that could be drawn with the given measure. Then, find the measures of the other angles and the other side in each possible triangle. Round side lengths to the nearest tenth of a unit and angle measure to the nearest tenth

asked by Han on June 10, 2014
2. ## English

Which is the best paraphrase of these lines from "January"? Fat snowy footsteps Track the floor, A. Thick, snowy footprints show where animals walked. B. Thick, snowy outlines of feet mark the floor. C. Large snow boots lie on the floor of the house. D. A

asked by Anonymous on March 6, 2019
3. ## Simple & Compounding Interest

I am SO STUCK on this problem... PLEASE HELP ASAP!!! Suppose Kevin and Jill both deposit \$4000 into their personal accounts. If Kevin’s account earns 5% simple interest annually and Jill’s earns 5% interest compounded annually, how much will each

asked by Need Help!!! on April 27, 2012
4. ## language arts

which is the best paraphrase of these lines from "January"? Fat Snowy Footsteps Track the floor, A)Thick, snowy footprints show where animals walked B)Thick, snowy outlines of feet mark the floor ****** C)Large snow boots lie on the floor of the house D)A

asked by HELP on October 10, 2016

which is the best paraphrase of these lines from "January"? Fat Snowy Footsteps Track the floor, A)Thick, snowy footprints show where animals walked B)Thick, snowy outlines of feet mark the floor ****** C)Large snow boots lie on the floor of the house D)A

asked by Shay on January 30, 2015
6. ## calculus

The number of U.S. citizens 65 and older from 1990 through 2050 is estimated to be growing at the rate of, R(t)=0.063t^2 -0.48t+3.87, (0 less than or = t less than or = 15) million people/decade, where t is measured in decades and t = 0 corresponds to

asked by mar on November 30, 2014
7. ## Grammar

Tranformation of Sentences ? 1.He wont show me his papers,he wont tell me who he is (use neither -nor) 2.This is all i posses.(Turn to negative) 3.No man in tge street came forward to help her.(Turn to Assertive) Plz post in the answers directly.. I will

asked by Ri on February 26, 2016
8. ## SCIENCE NOW

an experiment was conducted to test which of two antibiotics was more effective at killing a certain type if bacterium cultures a and b were treated with antibiotic 1; cultures c and d were treated with antibiotic 2; culture e was not treated with

asked by coolguy123 on August 30, 2016
9. ## Research Report

I have written an outline for my research report and I am now writing my report, but I'm finding it hard to see how I can use parts of my outline in my report. Do I include my outline in my report and change it as necessary? How exactly does this work?

asked by Anonymous on February 19, 2014
10. ## Physics

A traveler pulls on a suitcase strap at an angle 36 above the horizontal. If 555 J of work are done by the strap while moving the suitcase a horizontal distance of 15 m, what is the tension in the strap?

asked by Anonymous on October 27, 2014
11. ## Math

can you please help me work on this problem? I have a few and I want to know how to figure it out: The ratio of boys to girls in a class is 5 to 6. How many boys at in the class if there is a total of 121 students. I guessed 55 boys and 66 girls?

asked by Ana on January 28, 2017
12. ## English

What does it mean to vary the sentence pattern within a written work? (Please give some answer...Not just a web link...And if you give a link please give info on where answer might be located.)

asked by Xing on November 5, 2008
13. ## Math

The length of a rectangular field is 3 yards less than twice the width. If the area of the field is 104 squared yards, what are the dimensions of the field? The answer is W=8, L=13 How do you work it out to get the answer????

asked by Megan Bill on December 12, 2010
14. ## General Physics

A force Fx acts on a particle. The force is related to the position of the particle by the formula Fx = (5.9 N/m3) x3. Find the work done by this force on the particle as the particle moves from x = 0.9 m to x = 22 m. Answer in units of J

asked by Charles on July 26, 2013
15. ## calculus - interval of convergence

infinity of the summation n=0: ((n+2)/(10^n))*((x-5)^n) .. my work so far. i used the ratio test = lim (n-->infinity) | [((n+3)/(10^(n+1)))*((x-5)^(n+1))] / [((n+2)/(10^n))*((x-5)^n)] | .. now my question is: was it ok for me to add "+1" to "n+2" to become

asked by COFFEE on July 29, 2007
16. ## English

Is "sympatheticy" a word. I want to use a word like this. My sentence is... Blah Blah's character is determined by his willingness to work, his "sympatheticy" towards his son. Sounds like a word, but I don't know if it is. Thanks :)

asked by CoolioMan on November 8, 2010
17. ## math

7/x+5/3x=2/x-5 so lcm=3x(x-5) 21(x-5)+5(x-5)=5x 21x-105+5x-25=5x 26x-130=5x -26x to both sides -130=-21x divide each side by -21 -130/-21 x=6.19 is this correct thanks for checking my work.

asked by B8 on October 19, 2013
18. ## Physics

Two men of the same mass climb the same flight of stairs. The first man climbs the stairs for 25 seconds, while the seconds person takes 35 seconds. Which man does the most work?

asked by Justin on February 26, 2015
19. ## Math

The Cougars won 62% of their games. They won 93 games. How many games did they lose? I'm not exactly sure how to approach this I tried to divide 93 by .62 but that didn't quite exactly work out and I'm not sure how to find the whole with only different

asked by Dinga on March 20, 2017
20. ## maths

marc is looking at the plans for his new garage. the length of the garage is 8 metres. the scale of the drawing is 1:50 what will the length of the garage be on the drawing? which would be the most simplistic form for me to work this out, i really struggle

asked by josh on October 10, 2015
21. ## Physics

A traveler pulls on a suitcase strap at an angle 28° above the horizontal. If 1,266 J of work are done by the strap while moving the suitcase a horizontal distance of 50 m, what is the tension in the strap?

asked by job on March 5, 2017
22. ## Personal Finance (Math)

Becka borrowed \$100 from her cousin at the rate of 6% per year. If the inflation rate was 2% that year, what is her cousin's actual rate of return on the loan? How do you work this out?

asked by Luis on September 27, 2014
23. ## Physics

Calculate the work done by planet X on its moon. Planet X applies a force of 5.6 x 10^10 N on its moon and the moon is 4.0 x 10^8 km away from the planet and it continues to circle the planet in a circular orbit of circumference of 2.5 x 10^9 m.

asked by Marty on March 26, 2008
24. ## Physics

A rope is used o pull a metal box 15.0m across the floor. The rope is held at an angle of 46.0 degrees with the floor and a force of 628N is used. How much work does the force of the rope do?

asked by jess on January 26, 2010
25. ## physics

A traveler pulls on a suitcase strap at an angle 36 above the horizontal. If 555 J of work are done by the strap while moving the suitcase a horizontal distance of 15 m, what is the tension in the strap?

asked by Anonymous on October 27, 2014
26. ## physics

A 13 N force with a fixed orientation does work on a particle as the particle moves through displacement . What is the angle between the force and the displacement if the change in the particle's kinetic energy is (a) +9.19 J and (b) -9.19 J?

asked by Science on October 17, 2012
27. ## Math Algebra

The length of the hypotenuse of a right triangle is 30 m. The length of one leg is 20 cm. Find the length of the other leg. Round your answer to the nearest tenth I know how to do hypotenuse but this doesn't seem to work out...help please

asked by Deborah on December 16, 2012
28. ## Math

Bob takes 45 minutes each day for lunch. He does not get paid for the lunch break. How many hours does he work in a 5-day workweek if he checks in at 8:00 a.m. and checks out at 5:15 p.m. each day?

asked by Mike on May 12, 2012
29. ## Maths

Max works 7 hours per day monday to friday and 3 hours per day in the weekend. He does this for 48 weeks of the year. How many hours does he work in total for the year?

asked by Jessica on February 26, 2009
30. ## physics

A 14 N force with a fixed orientation does work on a particle as the particle moves through displacement d = (2i - 4j + 3k) m. What is the angle between the force and the displacement if the change in the particle's kinetic energy is (a) +7.54 J and (b)

asked by Sam on October 18, 2010
31. ## English

Can someone read over this paper and tell if it's okay? Plagiarism Assignment This is an interesting and serious topic. For this lesson I want you to write a 3-4 paragraphs about what you have found out about plagiarism: Search the Internet and find out

asked by Victoria on December 12, 2012
32. ## Economics

A description of the market form in which producers operate a detailed explanation,with graphs,of How the price of milk would have been determined in the absence of government involvement in the market a detailed explanation,with graphs,to show how this

asked by Zandile on May 25, 2016

Clayton and Olivia played a computer game. Olivia's final score was 2 306 421 and Clayton's was 2 302 972. Show these numbers on a number line. Whose score was greater? I know which score is greater but I am having trouble figuring out the number line and

asked by peyton on September 29, 2010
34. ## College Geometry

In discussing Frieze Groups it was assumed that there is a smallest positive translation along the axis. All translations for the pattern form a subgroup. Consider the axis to be the Reals and G to be a subgroup under +. Look at the infimum T of all

asked by Josh on May 8, 2012
35. ## Math

New Car. A game show gives away 2 new cars. One car is worth \$50,000 and the other car is worth \$40,000. Two members of the audience are randomly selected to participate and receive one of the two new cars. What is the expeted value if you are randomly

asked by Trey on March 18, 2009
36. ## Physic

Given that the distance between the Earth and the Moon is d = 3.84 􀀁 108 m, show that a satellite located exactly in-between the Earth and the Moon at a distance of 90% d from the Earth experiences no net force (at least when only the gravitational

asked by Jorge on March 26, 2009
37. ## Accounting

1. The company uses a job-order costing system. How would you recommend that manufacturing overhead cost be assigned to production? 2. Recompute the company's unit product costs in accordance with your recommendations in (1) above. Direct

asked by Chris on January 9, 2007
38. ## MATH

DURING A THUNDER STORM AND LIGHTNING STORM, TO ESTIMATE HOW FAR AWAY THE STORM IS, COUNT THE NUMBER OS SECONDS BETWEEN THE TIME YOU SEELIGHTINING AND HEAR THUNDER. DIVIDE THAT NUMBER BY 5 TO FIND THE DISTANCE IN MILES TO THE STORM. WRITE A SENTENCE TO

asked by MELISSA on August 21, 2008
39. ## English

Hi! Need some advice.Next week I need to teach a class. My task is to find a text (I have found it,it's a german literature)and now I need to do something with this text and it needs to last for 45-60 minutes.It shouldn't be just one task but more(3 at

asked by laxy on April 13, 2009
40. ## Pre-Calculus

Solve. Express your answer as exact roots. (s+6)^2 = 3/4 Sq root (s+6)^2 = +-sq root 3/4 (s+6) = sq root 3/ 2 s = -6 +- sq root 3 ----------------- 2 (The answer according to the textbook is (-12 +- sq root 3)/2. What error have I made?) Thank you

asked by Lucina on March 25, 2015
41. ## Math

You are working as an office apprentice for a collage. The collage is giving away free tickets to encourage more people to visit the amateur sport tournaments the collage is planning to host. Every time a customer purchases a ticket they are entered into a

asked by Kiara on March 6, 2017
42. ## Chemisty

When the oxide of generic metal M is heated at 25.0 °C, only a negligible amount of M is produced. MO2(s)M(s)+O2(g) DeltaS= 287.5 kJ/mol When this reaction is coupled to the conversion of graphite to carbon dioxide, it becomes spontaneous. What is the

asked by ACDub on March 30, 2014
43. ## Government!

If I could receive some guidance on these questions, I'd be ever so grateful. 1) How can a governor's message power affect legislation in a State? 2)What does the fact that aliens generally are not allowed to vote show about American beliefs? The governor

asked by Grace on April 30, 2007

A Fortune 500 CFO admits to having deliberately treated \$4 billion in operating expenses as assets, thereby allowing the corporation to show profits instead of losses. The auditor never detected this. The corporation’s stock drops 95 percent and bond

asked by Lily on June 3, 2012

What strategies could I use to re-sell products at the flea market and earn a higher profit? I watched the show the apprentice that this question is based on and in that the winning team chose to have their booth outside and sell women's jewellery and

asked by S.S on October 24, 2017
46. ## accounting

The following cost data relate to the manufacturing activities of Black Company during the just completed year: Manufacturing overhead costs: Property taxes, factory \$ 3,000 Utilities, factory 4,800 Indirect labor 9,900 Depreciation, factory 23,900

asked by sally on September 8, 2012
47. ## Astronomy

Put the following in order from earliest to latest. In doing so, assume that the Nice model occurred as described and that the Grand Tack model also occurred as described. 1) The formation of Jupiter 2) The inward migration of Jupiter due to gas forces 3)

asked by keitanako on May 13, 2014
48. ## Calculus-Reiny

Yay! Reiny, you read the description of f(x) correctly. Recall the problem posted earlier: Let f(x)= abs of negative abs of x + pi/2 close abs and g(x)= abs of cosx. the wording might be confusing so here is another description of the equation (the

asked by Anonymous on November 7, 2015
49. ## chemestry

At 298.K and 1.00 atm, assume that 22 mL of NO gas reacts with 18 mL of oxygen gas and excess water to produce nitric acid according to the following equation: O (g) H O(l) 2 HNO (g) 2 3 2NO(g) + 2 + 2 ¾¾® 3 . If all of the nitric acid produced by this

asked by lore on November 2, 2010
50. ## Mathemtical programming

Consider the following primal LP problem. Max 𝑍=2𝑥1+5𝑥2+7𝑥3 s.t. 𝑥1+2𝑥2=6,and 𝑥1≥0, 𝑥2≥0,𝑥3≥0. (a) Graph the feasible region. [4] (b) Find the gradient of the objective function, and then find the projected gradient onto

asked by saimi on March 31, 2015
51. ## Algebra 1

I am having trouble figuring out the final step when i get to multiply 5/9(1955.6) to get the set solution. Can you help. the question is below a metal stays solid at fahrenheit temperature below 1987.6. determine (in terms of an inequality) those celsius

asked by Kallie on August 17, 2010
52. ## Math

For a certain day,the depth of water,h, in metres in PEI, in hours is given by the formula:h(t) = 7.8 + sin3.5 (pi/6(t-3)), t E [0,24], assume t=0 represents midnight. Provide an algebraic solution to determine the time(s) of day, the water reaches the

asked by ba on July 22, 2016
53. ## math Steve for your solution

0.224g sample that contained only bacl2 and kbr required 19.7ml of 0.1M ango3 to reach the end point. Calculate the percentage of each compound present in the sample. The right answer bacl2 32.4% KBR 67.7% You need to use 3 solution of drug H containing

asked by Fai on December 28, 2013
54. ## Organic Chemistry

I spotted a commercial TLC plate, coated with silica gel, with a pure benzoin solution. After running the TLC plate in methylene chloride, the benzoin separated into two different spots. Rf values are 0.6 and 0.9. What explains this? A pure material should

asked by Sasha on October 2, 2015
55. ## math

to build a 2.5 m by 3 m deck, a local building supply store chargers \$1000 for materials, plus the carpenter's wage of \$30/h. The store gives you an estimate of \$1480 for the total cost. How much time is estimated for the carpenter to build the deck?

asked by mellanni on June 15, 2014
56. ## Chemistry

This is due very soon, please help!!! Describe how you would prepare the following two solutions. Be sure to include the type of glassware which you would use and as much detail as necessary for someone to actually prepare the solution using good

asked by Joe on November 7, 2017
57. ## Chemistry

NaCl + H2O + CO2 + NH3 ______> NaHCO3 + NH4Cl 1) You dissolve an excess of NaCl in a solution containing 50.0 mL of 4.77 M ammonia. You bubble in an excess of CO2. Calulate the theoretical yield of sodium bicarbonate. I have no idea how to do this, can I

asked by eylow on February 16, 2016
58. ## Chemistry

Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.300 M phosphoric acid solution. pKa1: 2.16 pKa2: 7.21 pKa3: 12.32 Hint: Convert

asked by Paula on March 9, 2013
59. ## Chemistry

What is the mass of La2(C2O4)3*9H2O, can be obtained from 650mL of 0.0170 M aq solution of LaCl3 by adding a stoichiometric amount of sodium oxalate. I don't know how to balance the equation for this..i started: LaCl3+ Na2C2O4 -> La2(C2O4)3*9H2O + NaCl

asked by Sindy on October 9, 2009
60. ## chem help

a. Determine the percent ionization for a 1.00M phosphoric acid solution at 25.0 oC given the following (assume the small x approximation is valid) H3PO4(aq) H2PO4(aq)H+(aq) ΔGf (kJ/mol) -1142.6| -1130.2 | 0 b. Assuming ΔGf does not change with

asked by Mall on April 19, 2015
61. ## Math

For a certain day,the depth of water,h, in metres in PEI, in hours is given by the formula:h(t) = 7.8sin (pi/6(t-3)), t E [0,24], assume t=0 represents midnight. Provide an algebraic solution to determine the time(s) of day, the water reaches the depth of

asked by Stacy on July 22, 2016
62. ## Chemistry

Complete the following equilibrium reactions that are pertinent to an aqueous solution of Ag2CO3. Physical states, s, l, g, and aq, are optional. So far I worked it out to be: Ag2CO3(s) 2Ag^+ + CO3^(2-) H2CO3(aq) + H2O(l) H3O^(1+) + (HCO3)^(-) HCO3^(-)(aq)

asked by Craig on April 6, 2016
63. ## Chemistry

What is the pH of a solution prepared by mixing 50.0 mL of 0.010 mol/L HCl(aq) and 50.0 mL of 0.010 mol/L Ca(OH)2(aq)? Assume the temperature is 25 degrees Celsius. Additional information given: Kw = 1.0×10^−14 at 25 degrees Celsius. The possible

asked by allie on May 4, 2016
64. ## chemistry

Which of the following is true of the solubility product constant? A. It is the product of the initial concentrations of the ions in a solution. B. It is an equilibrium constant. C. It is an equilibrium position. D. Its value changes in the presence of a

asked by jessie on September 11, 2016
65. ## Math

RD – z, t, or Chi-Square Test Study Background During this week you will work in your group discussion area to identify a research question created in week 1 that would utilize any of the following: z test, t test for single sample, independent samples t

asked by Nancy McGee on August 26, 2014
66. ## Math

RD – z, t, or Chi-Square Test Study Background During this week you will work in your group discussion area to identify a research question created in week 1 that would utilize any of the following: z test, t test for single sample, independent samples t

asked by Nancy McGee on August 26, 2014
67. ## physics

A ball is shot out of a spring and into a hollow ballast which then swings upwards 2.5 cm. The ball has a mass of 0.10 kg, the ballast has a mass of 0.50 kg and the spring constant is 500 N/m. How fast was the ballast-ball system moving immediately after

asked by Whitney on November 5, 2014
68. ## Inorganic chemistry

MnO4^-(aq) + H20(l) ==> MnO2 + OH^- net charg is -1 +7 (-8) ==> 4(-4) Manganese is reduced MnO4^- +3e- ==> MnO2 H2) is the oxidizing agent in a basic solution Mno4^- + H2O(l) --> MnO2(s) + OH^- Add on OH^- to both sides of the equation for every H+ ion

asked by Steve on April 14, 2009
69. ## Physics

What is the maximum speed at which a car could be moving and not hit a barrier 35.0 m ahead if the average acceleration during braking is -10.0 m/s2 and it takes the driver 0.90 s before he applies the brakes? subtract from the 35 m the distance during

asked by Sarah on September 4, 2007
70. ## English

To solve this problem, ten schools founded the Football Association of England and made a set of standard rules in 1863. That was the year when moden soccer started. (What does 'that' refer to in the last sentence? Does 'that' refer to '1863' or the

asked by rfvv on June 14, 2011
71. ## Algebra

With the origin as the center of dilation, rectangle PQRS will be dilated by a scale factor of 6x24 to form rectangle P’Q’R’S’ . 220x219 What will be the length of 23x10 ? A 3 units B 2 units C 27 units D 18 units I chose D, I read and watched a

asked by Baby_Banana on December 7, 2017
72. ## Physics

this is the information i was given, it is confusing since the teacher didnt explain it at all... - speed of light = 3x10^8 m/s - 1nm= 10^-9 m the problem i have to solve is... A laser has a wavelength of 2.5 nm. What is the frequency in Hz? (Type your

asked by Anonymous on June 13, 2018
73. ## human services

How does the unique realtionship between human service oragnizations and the populations they serve impact ethical decisions? what are some dilemmas that occur in human service organizations? which do you thind has the greatest power to solve or prevent

asked by sally on March 4, 2010
74. ## physics

A car is sitting at the top of an inclined plane, which is 5.2 meters long and meets the horizontal at an angle of 12 degrees. The cart is then allowed to roll to the bottom of the incline. What will be the velocity of the cart at the bottom of the

asked by joe on February 25, 2012
75. ## Finance

I'm struggling with being able to solve this question: A company wants to raise money in the capital markets. The firm intends to sell \$18 million of common stock; the expected return is 15%. In addition, the company plans to issue \$5 million of debt, the

asked by Veronica on October 24, 2016
76. ## statistics

help i do not understand how to solve this question: assume that blood pressure readings are normally distributed with a mean of 111 and standard deviation of 7. A researcher wishes to select people for a study but wants to exclude the top and bottom 10

asked by jessica on March 24, 2014
77. ## math

(a) Complete the square by writing in the form . Note: the numbers and can be positive or negative. x^2-14x-17=(x-7)^2+ (b) Solve the equation by completing the square or using the quadratic formula. If there is more than one correct answer, enter your

asked by Anonymous on September 6, 2012
78. ## Math (Calculus II) (Partial Fraction Decomposition

I'm having trouble trying to solve for the partial fraction decomposition in order to find the integral. ∫ x / (x^4 - a^4) dx I'm assuming a is some constant in this case. So I factored the denominator to this: (x^4 - a^4) = (x^2 + a^2)(x + a)(x - a)

asked by Ray on May 17, 2017
79. ## Chemistry

Consider a 0.10 M solution of a weak polyprotic acid (H2A) with the possible values of Ka1 and Ka2 given below, calculate the contributions to [H3O+] from each ionization step. Part 1: Ka1=1.0*10^-4 Ka2=1.0*10^-5 Part 2: Ka1=1.0*10^-4 Ka2=1.0*10^-6

asked by Chay on April 2, 2014
80. ## chemistry

Which of the following sets of solute and solvents will make a homogeneous solution? (naphthalene is a non-polar organic molecule) 1. Water and benzene 2. Benzene and ammonium nitrate 3. Benzene and naphthalene 4. Water and naphthalene

asked by katie on November 29, 2011
81. ## Chemistry

A 5.0g KBr sample, at 25 degrees celsius, dissolved in 25 ml of water, also at 25 degrees celsius. the final equilibrium temperature of the resulting solution is 18.1 degrees celsius, What is the enthalpy change in J/g and KJ/mole of KBr.

asked by jonathan on November 14, 2012
82. ## Chemistry

Write the equation for the equilibrium that exists when nitrous acid and sodium acetate are placed in solution together (do not include spectator ions). Using published values for the Ka of nitrous acid and of acetic acid, determine the numerical value of

asked by chamy on April 4, 2012
83. ## Chem

You made up a saturated solution of calcium sulfate (CaSO4). The temp is 25 degrees Celsius. You then add 5.00*10^-3 of sodium sulfate (NaSO4). What are the concentrations of calcium and sulfate after equilibrium is reached? The pKs of CaSO4 is 4.58. I

asked by Mig on June 5, 2011
84. ## American government

Aluminium sulphate when dissolved in water forms aluminium hydroxide and sulphuric acid.Since, aluminium hydroxide is insoluble in water, a clear solution is not obtained. Al2(SO4)3 + 6H2O →2Al(OH)3 + 3H2SO4Aluminium Aluminiumsulphate Hydroxide

asked by Alex on January 1, 2017
85. ## Chemistry

Monochloroacetic acid, HC2H2ClO2, is a skin irritant that is used in "chemical peels" intended to remove the top layer of dead skin from the face and ultimately improve the complexion. The value of Ka for monochloroacetic acid is 1.35 10-3. Calculate the

asked by Kaleen on November 23, 2011
86. ## chemistry

how do i calculate the NaOH molarity from a titration of KHP and NaOH after preparing KHP to standardise NaOH. KHP mass was 2.0378g dissoveld in distilled water to fill up a 100ml volumetric flask and only 10ml of this solution was used to in titration

asked by k on March 22, 2013
87. ## Science(Chemsitry)

HNO3 used as a reagent has specific gravity of 1.42g/ml and contains 70% by strength HNO3. Calculate a)Normality Of Acid b)Volume of acid that contains 63g pure acid c)Volume of water required to make 1N solution from 2ml conc.HNO3

asked by Atul on June 16, 2011
88. ## general math

The base jeepney fare is PHP 8.00 for the first four kilometers and an additional PHP 1.50 per kilometers for the succeeding kilometers, express the fare for x kilometers as a function of x. please help me and kindly put the solution too. thank you :)

asked by Rachelle on July 21, 2016
89. ## Chemistry

0.100 moles of NaOH are combined with 0.125 moles acetic acid. The mixture is taken to a final volume of 100.00 ml. What is the expected pH of the solution? Use Ka for acetic acid of 1.76 x 10^-5

asked by Jay on November 13, 2014
90. ## Economics/Statistics

1. Assume that q and z are two random variables that are perfectly positively correlated. q takes the value of 20 with probability 0.5 and the value of zero with probability 0.5, while z takes the value of 10 with probability 0.5 and the value of zero with

asked by Susan on December 6, 2009
91. ## chemistry

Lithium iodide has a lattice energy of -7.3x10^2kj.mol and heat of hydration of -793kj.mol. Find the heat of solution for lithium iodide.

asked by Cassie on September 22, 2011
92. ## Chemistry

Please help! I have 30 ml bottle of 5% hydrocholric acid. Ned to dillute to make 200 ml of .01 M hydrocholric acid. I don't know how much of the bottle solution to add to how much distilled water to get 200 ml at .01 M

asked by Dan on March 4, 2015
93. ## chemistry

a solution consisting of 5.0 gm of an organic solute per 25 gm of CCl4 boils at 81.5 degree celecius .what is the molecular weight of the solute? If the boiling point is 76.8 degree celecius and Kb of CCl4 is 5.02 .

asked by heba on June 6, 2010
94. ## absolute value

when you are solving an equation involving absolute values, do you have to have both negative and positve solutions?? not necessarily, it depends on the equation. e.g.#1 │2x-1│ = 5 then (2x-)=5 or -(2x-1)=5 x=3 or x=-2 here you have a positive as well

asked by Kieran on July 27, 2007
95. ## science

how to prepare 0.100M HCL solution when laboratory grade concentrated by hydrochloric acid has concentration of 37%.what volume of acid is necessary to prepare 500mL of 0.100M of HCL

asked by Qyla on September 21, 2012
96. ## Math

I'm studying to take a math placement exam and it has been a long time since I've taken a math class. Can someone please give me a step to step solution of these: A.Simplify: 8x/[2^(x-1)] Answer = 2^(2x+1) B.Simplify: (2^x)*[4^(x-1)] Answer = 2^(3x-2)

asked by Lulu on December 25, 2012
97. ## chemistry

calculate the weight of crystal formed on cooling 80 gm of saturated solution from 60 degree Celsius to 30 degree Celsius. solubility of salt at 60 degree Celsius and 30 degree Celsius are 132 and 95 respectively.

asked by hey on November 23, 2010
98. ## science

ferrous sulphate + sodium hydroxide forms ppt. ferrous hydroxide + sodium sulphate is left in the solution write a balanced chemical eqn.. for this..

asked by jane on June 11, 2013
99. ## Chemistry

Calculate the vapor pressure of a solution of 0.48 mol of cholesterol in 6.0 mol of toluene at 32°C. Pure toluene has a vapor pressure of 41 torr at 32°C. (Assume ideal behavior.)

asked by Stevi on February 16, 2013
100. ## chemistry

Concentrated hydrochloric acid has 37.5% of HCl in mass and density of 1.2 g/cm3. What volume (in mL) of concentrated hydrochloric acid should be used to prepare 7 L of a 0.8 mol/L HCl (aq) concentration solution?

asked by damon on May 16, 2019