# 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 273
1. ## Chemistry

In each of the following, determine how much solute (in g or mL) must be added to the correct quantity of water to make the given amount of solution at the correct concentration. a)KI to make 50.0mL of a 0.50 M solutioon b)12.0 M HCL to make 500 mL of a

asked by Kim on May 2, 2010
2. ## Chemistry

A 0.753 m solution of the solute CH3CN dissolved in the solvent C6H6 is available. Calculate the mass ( g ) of the solution that must be taken to obtain 3.274 mol of CH3CN. Additional info: Molar Mass (g/mol) CH3CN 41.05 C6H6 78.11 Density ( kg/L ) CH3CN

asked by Kyo on May 8, 2010
3. ## Geography

These are my already asked questions that I didn't find an answer to [I'm not sure why] Can someone please help with them, because my exam's due monday. 2. How has human settlement affected the natural vegetation of Western Europe? a. People have carefully

asked by mysterychicken on October 3, 2009
4. ## Physics

please check my answers, they are Capitalized 1. the SI base unite used to measure mass is the a. meter b. second. C. kilogram d. liter 2. how does a scientist reudce the frequency of human error and minimize a lack of accuracy? a. take repeated

asked by y912f on January 28, 2009
5. ## Introduction to Psychology

Joaquin has been assigned a primary research project in his psychology class. He is to observe student behavior during a learning task andattempt to for a(an) ________. In order to do this, he must be able to describe principlesand events, and how they may

asked by Carol on November 5, 2011
6. ## math...

A. Solve a-9=20 I did 20+9=29 29-9=20 a=29 Part b solve b-9>20 I did b-9>20 b-9+9>20+9 b>29 Part c how is solving the equation in part a similar to solving the inequality in part b? I put They are both using the same numbers. Part D I put A is equal to and

asked by Anonymous on September 25, 2014
7. ## Chemistry

Consider the reaction HCHO(g) *) H2(g) + CO(g). 1.0 mol of HCHO, 1.0 mol of H2 and 1.0 mol of CO exist in equilibrium in a 2.0 L reaction vessel at 600C. a) Determine the value of the equilibrium constant Kc for this system. 2.0 moles of HCHO and 1.0 mol

asked by Susan on June 3, 2014
8. ## math

I'm working on a project about buying a new car. It says: A common bit of financial wisdom is that a car payment should be no more than 20% of your monthly take-home pay. Set up and solve an equation to determine how much you would need to be making in

asked by carly on March 5, 2018
9. ## art 101

According to the author, a. the interpretation of a work of art is objective. b. a work of art may fall into more than one theme. c. it doesn’t make sense to compare art from different cultures. d. all of these are the case: the interpretation of art is

asked by elizabeth on October 5, 2012
10. ## art

According to the author, A) the interpretation of a work of art is objective. B) a work of art may fall into more than one theme. C) it doesn’t make sense to compare art from different cultures. D) all of these are the case: the interpretation of art is

asked by Pebbles on May 29, 2011
11. ## math

Mr waheed is paid Rs.4420 for a total normal working hours of 170 hours in a month. He is paid twice the rate per hour for overtime work. Mr waheed received Rs.6500 as salary last month. how many hours of overtime did he work?

asked by robbert on September 28, 2017
12. ## MATH

You earn \$10.00/hour and work 40 hours/week. You invest \$4,000.00 at an interest rate of 5% APR for a year. How much interest did that savings earn in a year in terms of hours of work? 100 hours 20 hours 40 hours 400 hours Explain?

asked by Anonymous on March 25, 2015
13. ## English Improving writing

Please take a look at this for me I must 8-15 sentences per each paragraph any ideas how I can do that thanks for the help Rough Draft There are on-going problems that need to be addressed at the DMD Company. First there is uneven allocation of tasks.

asked by Kaleigh-Anne on July 8, 2008
14. ## algebra

How many quarts of permanent anti-freeze must be added to 10% quarts of a 40% anti-freeze solution in a radiator of a truck to make a 25% anti-freeze solution?

asked by jay on October 1, 2015
15. ## Math

I'm horrible at word problems but Create a chart that has the following information for each of the three selected carriers: cost per month, base number of minutes, additional cost per minute (overage) Using the information from the chart you created,

asked by Jason on April 16, 2016
16. ## chemistry

A 1.10g- sample contains only glucose and sucrose . When the sample is dissolved in water to a total solution volume of 25.0ML , the osmotic pressure of the solution is 3.78atm at 298K a.What is the percent by mass of glucose in the sample? b.What is the

asked by bf on January 24, 2010
17. ## Chemistry

Given a diprotic acid, H2A, with two ionization constants of Ka1 = 4.5× 10–2 and Ka2 = 5.2× 10–7. Calculate the pH and molar concentration of each protonated form for a 0.133 M solution of NaHA. Calculate the pH and molar concentration of each

asked by amanda1012 on October 2, 2012
18. ## Chemistry

calculate the final concentration if 4.0 L of 1.5 M NaCl and 2.0 L of 3.0M NaCl are mixed. I am confused about how to calculate the final concentration. We are currently working on solutions. I think first I need to divide the amount of the solution by the

asked by Lori on January 30, 2008
19. ## Chemistry

A galvanic (voltaic) cell consists of an electrode composed of magnesium in a 1.0 M magnesium ion solution and another electrode composed of copper in a 1.0 M copper(I) ion solution, connected by a salt bridge. Calculate the standard potential for this

asked by Anon on April 1, 2013

Hi, can someone please proofread this for me? Topic: Explain why dating is not an effective method for screening out future divorces especially those that take place early in marriage Dating is not an effective method for screening out future divorces

asked by Bizzy on January 17, 2008

company A makes boxes of crackers that contains a mean of 30 crackers with a standard deviation of 2 crackers. company B makes boxes of crackers that contains a mean of 24 crackers with a standard deviation of 2 crackers. what can be said about the boxes

asked by dingbat on March 26, 2013
22. ## Re: Physics/Math

A can of sardines is made to move along an x axis from x1 = 0.2 m to x2 = 1.2 m by a force given by F = iF0exp(-0.4x), with x in meters and F0 = 4.5 N. (Here exp is the exponential function.) How much work is done on the can by the force? For Further

asked by Technoboi11 on March 2, 2007
23. ## Keyboarding and Applications

You are researching the Holocaust for a school paper and have located several Web sites for information. In three to five sentences, describe the method you would use to determine whether each Web site is a suitable source of information for your paper.

asked by Hannah on December 8, 2017
24. ## Algebra

Mutiplying a Binomial by a Trinomial (FOIL) First, Outer, Inner, Last Method (3X+2)(X-1)(X+3) I have tried equation several times. The book says the answer is: 3X 3rd + 8X 2nd - 5X -6 I get: 12X 2nd - 6X + 3X 3rd -4 Not sure if i am doing it wrong or if

asked by G on April 22, 2008
25. ## physical science

Two force vector,a and b act on an object in the x direction and b acts on a y direction. Use words and diagram to explain how you can find the resultant force acting on the object by using the tail-to-head method

asked by ncumisA on February 11, 2014
26. ## accounting

o How are entries made under each type of accounting? o How does each type of accounting handle depreciation, if at all? o How is inventory accounted for? o Are there any differences between the organizations that adopt a particular accounting method? o

asked by katie on February 2, 2009
27. ## HHS 235

What method of ethical oversight (for example, a code of ethics, ethic adivsory board, oversight by the board of directors or an ethic audit) would you suggest for Acre Woods retirement community?

asked by Anonymous on August 25, 2008
28. ## Maths A

In January this year, Kathryn bought a new computer for \$6000. She estimates its useful life as 5 years and its scrap value as \$1500. If Kathryn uses the diminishing value method, determine the value of this computer at the end of 3 years.

asked by Anne on June 9, 2013
29. ## Math

Loan Amount: \$15,000 Method of payment: discount basis Amount of Interest : \$650 Term of loan: 1 year Effective Rate of Interest (to the nearest tenth): %

asked by sarah on July 8, 2013
30. ## Math

Can I get some help? 1. If v = (-5, -3), -5 ||v||^2 2. For the following vector v, find ||u||, the unit vector with the same direction angle as v. V = -25j Does u = -j? 3. True or False: To graphically add two vectors, V+w, using the tip-to-tail method,

asked by mysterychicken on June 8, 2013
31. ## Science

Hello, I am working on Methylene Blue dye adsorption for my thesis. I am embarassed to say I don't know basic chemistry. Anyway, my question is I have Methylene Blue Trihyrate 95%. I am trying to prepare stock solution. If I plan to make 1000 mg/l of

asked by Sinduri on November 19, 2007
32. ## gse 122

(1) y varies partly as D an partly as the cube root of D.when Y=6, D=27 an when Y=11,D=1/8.find Y when D=3. Correct to 2 decimal point. (2) using completing the square method find the root of the equation 8x+6x-5=0

asked by kakjing pirbut moses on October 25, 2016
33. ## math

if x is the set of pupils in a certain school and y is the set of pupils who play volleyball in this school.write y complementary in the distinctive method and shade by venn diagram

asked by ash on October 25, 2016
34. ## psychology

Hello, I have to do a method section for a paper and need to know what I would put down for measurement and procedure section. like an example its on 500 college women and 500 college men participating in a study. thanks

asked by darien on June 28, 2012
35. ## Algebra

Find the GCF for each of the following groups of numbers. 36, 54, and 180 Find the LCM for each of the following groups of numbers. Use whichever method you wish. 8, 15, and 20 can anyone IM me or email how to SIMJPLIFY RADICAL EXPRESSIONS please?

asked by Dave on May 20, 2007
36. ## economics

The forecasting method that involves using an average of past observations to predict the future (if the forecaster feels that the future is a reflection of some average of past results) is the

asked by tommy on October 19, 2008
37. ## chemistry 20

A student mixed a solution of aqueous calcium chloride with an aqueous solution of magnesium sulphate. A precipitate formed. 1) Write the balance chemical equation for the reaction including states of matter. Ensure you write the reactants as a dissociated

asked by amber on May 11, 2015
38. ## English

Here is the very last part! I've finished it! My next homework will be on history, literature and grammar again!!!! 1) DISSEMINATION OF THE RESULTS Work stage I - Courses in English and ICT - Evaluation and analysis of activities and attitudes Work stage

asked by Henry2 on February 9, 2012
39. ## Chemistry

Ok.I have a titration experiment yesterday 0.2 M of KHP were used and the volume of the titrated solution is 20Ml,it was titrated with 0.2M of NaOH solution with an equivalence volume of 18M.What is the theoretical Equivalence volume of KHP titrated

asked by Mavis on May 7, 2019
40. ## mathematics-Rate

4 men and 10 women can cut a field in 5hrs. If the men work at 5/4 the rate at which the women work. How many men will be needed to cut the field in 3hrs. #Please i need the detail explanation #thanks

asked by p1 on June 28, 2016
41. ## Physics

A tennis player hits a 58.0 g tennis ball so that it goes straight up and reaches a maximum height of 7.02 m . Part A How much work does gravity do on the ball on the way up? Part B How much work does gravity do on the ball on the way down?

asked by Jamie on November 12, 2017
42. ## algebra 2

Jeremy and Noor are playing a game where they each draw a marble from a bag, and whoever draws the marble worth the most points wins. Red marbles are worth 1 point, green marbles are worth 2 points, blue marbles are worth 3 points, and white marbles are

asked by jenny on May 23, 2012
43. ## math

DQ sells 6 times as many orders of french fries as sonic everyday. If both sold 60 more orders DQ would only sell 3 times as many fries. How many do each sell before and after the incease? math - DrBob222, Wednesday, December 23, 2009 at 4:34pm S = number

asked by petie on December 24, 2009
44. ## science and medicine

I am having some trouble working this out . Could you possibily show me how to work it out.Thank You! A bicyclist rode into the country for 5 h. In returning, his speed was 5 mi/h faster and the trip took 4 hours. What was his speed each way? Could somone

asked by Malik on March 21, 2007
45. ## Trigonometry

I am trying to help my son with his math, but I am stuck! The advertisement for a new shoe promises runners less slip. The coefficient of friction (μ) between concrete and a new material used in the sole of this shoe is 1.5. The force of friction that

asked by Mary on June 24, 2010
46. ## Science

Ms. Lewis is a chemist mixing two solutions together. A chemical reaction takes place, and the solution becomes warm. Which statement best describes what has happened? A. Energy has been created in the form of thermal energy B. Energy has been transformed

asked by Anne on February 2, 2013
47. ## pHYSICS

A BALL IS THROWN STRIAGHT UPWARD AND RETURMS TO THE THROWER'S HAND AFTER 3 SECONDS IN THE AIR. A SECOND BALL IS THROWN AT AN ANGLE OF 30 DEGREES WITH THE HORIZONTAL. AT WHAT SPEED MUST THE 2ND BALL BE THROWN SO THAT IT REACHES THE SAME HIEGHT AS THE ONE

asked by Jill Hefner on November 1, 2006
48. ## Language Art

2.)Why does the author of "The Drummer Of Shiloh" say it is a "Solemn Night For a boy just turned fourteen"? A.)The wind is full of whispers B.)The Army is Camped near a church C.)The boy will be his 1st battle soon D.)The boy does not like sleeping in a

asked by Student on September 30, 2015
49. ## health

Compare health care delivery and management options available in the U.S with health care delivery and management options available in a different country of your choice. · Select one feature from each country’s system that, in your opinion, is the most

asked by Anonymous on August 29, 2010
50. ## Math

A ball is thrown straight up from a bridge over a river and falls into the water. The height, h, in meters, of the ball above the water t seconds after being thrown is approximately modeled by the relation h=-5t^2+10t+35. Can you please help me ! Show your

asked by Alex on November 26, 2014
51. ## Chemistry

I would really like to understand how to do these problems, because my exam is coming up in a few weeks. I still cannot comprehend how you can tell if a system is is positive or negative according to reaction. For #1, I presume it is E if it is spontaneous

asked by Rainie on March 27, 2014
52. ## Chemistry

I would really like to understand how to do these problems, because my exam is coming up in a few weeks. I still cannot comprehend how you can tell if a system is is positive or negative according to reaction. For #1, I presume it is E if it is spontaneous

asked by Rainie on March 28, 2014
53. ## Chemistry URGENT

I am not good with math problems. I need help with these two problems. I'm not sure what equations to use. please help. A student heated a hydrated salt sample with an initial mass of 4.9702 g. After the first heating, the mass had decreased to 3.0662g. 1.

asked by jazz on April 24, 2014
54. ## Chemistry

Please Help!! I don't know how to balance this redox equation! I've been trying to solve this for hours and I'm getting nowhere Fe(s) + HClO4 (aq) --> H (g) + FeClO4 I tried balancing and I got these Fe(s) + HClO4 (aq) --> H2 (g) + Fe(ClO4)3 and 2Fe(s) +

asked by Janie_ on October 10, 2014
55. ## physics

An interstellar ship has a mass of 1.20 X10^6 kg and is initially at rest relative to a star system. a) what constant acceleration is needed to ring the ship up to a speed of .10c (where c is the speed of light, 3.0X10^8 m/s) relative to the star system in

asked by Bri on November 21, 2006
56. ## Chemistry

I am stuck in this problem I need to calculate the molality first so I could find T but I don't know which one is the solvent and which one is the solution the problem is to calculate the freezing point of a solution containing 12.2g of benzoic acid,

asked by Maria on October 27, 2008
57. ## calc asap!

can you help me get started on this integral by parts? 4 S sqrt(t) ln(t) dt 1 please help! thanks! Integral t^(1/2)Ln(t)dt = 2/3 t^(3/2)Ln(t)- 2/3 Integral t^(1/2) dt = 2/3 t^(3/2)Ln(t) - 4/9 t^(3/2) Simpler method: Integral t^(a)dt = t^(a+1)/(a+1)

asked by Woof on June 7, 2007
58. ## CALC

Use Newton's method to approximate a root of the equation x3+x+3=0 as follows. Let x1=–1 be the initial approximation. The second approximation x2 is _____? and the third approximation x3 is _____?

59. ## Math/Physics

crain carries concrete = 610kg distance carried vertically = 91m time carried = 90 seconds What is the kilo watt? I'm not sure which formulas to use... anyone know the answers? Power = (Work done)/(time required) The work done is M g H = 610x9.8x91 =

asked by Mike on November 26, 2006
60. ## Math

120 people are given a survey about which television shows they watch. ABC=55 NBC=30 CBS=40 ABC and CBS=10 ABC and NBC=12 NBC and CBS and ABC=5 It wants you to solve for the remaining regions of the circle (mainly what NBC+CBS equal). I know you have to

asked by Ali on April 10, 2013
61. ## math

Vanessa typically works 8 hours per day in a normal 5 day work week. Last week however vanessa had to take 90 minutss off on tuesday 45 minutes off on Thursday and she left rwo and a half hours early on friday how many hours did vanessa work last week

asked by Anonymous on May 7, 2014
62. ## Math

MathMate - I'm still confused, please see below. Thanks!! SIMPLEX METHOD - Table: Nutrient Peanuts Raisins M&Ms Pretzels Calories 855 435 1024 162 Protein 34.57 4.67 9.01 3.87 Fat 72.50 0.67 43.95 1.49 Carbs 31.40 114.74 148.12 33.68 Suppose that you want

asked by Jay on June 6, 2011
63. ## Math

Hi! So this question kind of has two parts to it. If someone could help me with this, that would be great! Thanks! :) Juan lives in a large city and commutes to work daily by subway or taxi. He takes the subway 80% of the time because it costs less and he

asked by Ariana on February 6, 2015
64. ## chemistry

Hey, can somebody here help me with this stuff? 1) Why are radioisotopes with long half-lives not administered internally in medical procedures? 2) What % of C-14 would you expect a piece of 34000 year-old fossilized bone from a mastodon to have when

asked by Roger on January 2, 2007
65. ## pharmacy calculations

1.a newborn weighs 3,000 g. what is his weight in kilograms? 2.a newborn weighs 3,000g. what is his weight in pounds? 3.a stock bottle contains 2.5 liters of solution how many 2oz bottles can be filled using this solution? 4.you need to give 6mg of a drug.

asked by cleondra on September 19, 2012
66. ## Math - Intersection of planes

You are given the following two planes: x+4y-3z-12=0 x+6y-2z-22=0 a) Use the two original equations to determine two other equations that have the same solution as the original two. ANS: the original two are not parallel in anyway so can I just take

asked by Shaila on September 20, 2010
67. ## Chemistry

Hi! I kind of need help to get started with these four problems. There are more problems like the ones below. It would be great if I had an example of each of the four problems. Thanks! FeSO4(aq)+ KCL(aq) (for problem 1 and 2) 1)When the following

asked by chrissy on October 15, 2006
68. ## chemistry

Adding a complex ion forming species to a solution will increase the solubility of a slightly soluble species. Calculate the Molar solubility (s) of AgI in a 1.75 M ammonia solution. The Ksp for AgI is 8.3 x 10-17 and the Kf for Ag(NH3)2+ is 1.5 x 107. I

asked by bekah on April 14, 2014
69. ## Chemistry 1

You carefully weigh out 17.00g of CaCo3 powder and add it to 68.85g of HCl solution. You notice bubbles as a reaction takes place. You then weigh the resulting solution and find that it has a mass of 78.88g . The relevant equation is CaCo3(s)+ 2HCl(aq)--->

asked by Christy on May 30, 2011
70. ## chemistry

back again with another analytical Q, the question tells you to prep a 50 mL solution of a 750 ppm iron solution using ammonium iron III oxalate trihydrate (MM: 428.06 as a source of iron. Determine the mass of compound required. I'm assuming you would

asked by paul on August 27, 2015
71. ## math

Kevin and Zach are playing a number guessing game. Kevin says, "I am thinking of a number. If you double it and then subtract one, the result is 7." a) Write an equation that Zach could solve to find Kevin's number. b) Explain the steps Zach could use to

asked by sam on April 7, 2008
72. ## Chemistry

Benzene has a vapor pressure of 100.0 Torr at 26°C. A nonvolatile, nonelectrolyte compound was added to 0.309 mol benzene at 26°C and the vapor pressure of the benzene in the solution decreased to 60.0 Torr. What amount (in moles) of solute molecules

asked by Angelica on February 15, 2010
73. ## algerbra

could you please double check my work question:find the roots of the equation 2x^2+8x=12 by completing the square. leave answer in simplest radical form. work and answer: c=(b/2)^2 c(4/2)^2=4 2x^2 +8x=12 divide everything by 2 x^2 + 4x=6 x^2+4x+4=10

asked by Liz on April 22, 2017
74. ## Calculus

show that the curves r=asin(è) and r=acos(è) intersect at right angles. can you show that the derivatives for each are the negative reciprocal of each other? That is the key. i need more info..i know how to find the derivative...but how will that prove

asked by Amy on April 5, 2007
75. ## Hypergeometirc Distribution

From a lot of 12 flares, 4 are selected at random. If the lot contains 4 defective flares *flares that will not fire), what is the probability that all 4 will not work? What is the probability that at most 2 will not work?

asked by Alicia on May 4, 2011
76. ## Physics

A sanding disk with rotational inertia 1.1 x 10^-3 kg*m^2 is attached to an electric drill whose motor delivers a torque of 6 Nm about the central axis of the disk. What are the following values about the central axis at the instant the torque has been

asked by COFFEE on March 30, 2007
77. ## Science

In Kjeldhal's method, Conc. H2SO4,NaOH & Boric acid is used to measure the % of nitrogen in a sample. If , in a sample HgCl2 is added , will it interfere the reaction? Accurate conc. of nitrogen will be determined or not?

asked by Jyoti on May 5, 2016

Determine which sampling method was used in each scenario. on a particular day 5 flights are selected at random and all of the passengers on these 5 flights are screened. Airport security uses a random number generator to determine the next passenger to

asked by Melissa on February 23, 2013
79. ## calculus

Find the volume of the solid generated by revolving the region about the given line. The region in the second quadrant bounded above by the curve y = 16 - x2, below by the x-axis, and on the right by the y-axis, about the line x = 1 I have gathered, that

asked by Tiffany on April 12, 2013

Determine which sampling method was used in each scenario. on a particular day 5 flights are selected at random and all of the passengers on these 5 flights are screened. Airport security uses a random number generator to determine the next passenger to

asked by Taylor on February 24, 2013
81. ## A-Level Chemistry

How many alcohols (including both structural isomers and stereoisomers) can have the molecular formula C4H10O I know what structural and stereoisomers are but i want to know that whats the method to find the total number of isomers of this compound.

asked by Areeb on April 14, 2010

Determine which sampling method was used in each scenario. on a particular day 5 flights are selected at random and all of the passengers on these 5 flights are screened. Airport security uses a random number generator to determine the next passenger to

asked by Melissa on February 23, 2013
83. ## Algebra

I distributed 3x^2+x-10=f(x) to find the zeroes. My book's answer was (3x-5)(x+2). When I distributed this to make sure I got the original function, I got 3x^2-x-10. Is this still an acceptable way to factor it even though the x is negative instead of

84. ## Math

Hi everyone, my name is Emerson. I was wondering if anybody could help me on a test. I'm stuck on some, but I think I know some others. Thank you! 1. Translate the phrase "nine more than two times a number" in to an algebraic expression. A. 9x + 2 B. 2x +

asked by Emerson on December 7, 2015
85. ## math

A single card is selected from an ordinary deck of cards. The sample space is shown in the following figure. Find the following probabilities. (Enter the answers either as fractions or as decimals rounded to three places.) P(five of clubs) = 1 P(five) = 2

asked by Anonymous on August 24, 2012
86. ## Physics

A cyclist intends to cycle up a 7.5 degree hill whose vertical height is 170 m. Assuming the mass of bicycle plus cyclist is 95 kg, calculate how much work must be done against gravity. If each complete revolution of the pedals moves the bike 5.6 m along

asked by Linda on November 16, 2010
87. ## circles and arcs

YOU have a circle with a traingle inside. P being the top of triangle and Q and R, are on the sides, PQ= (8x-10) and PR=(6x) and the bottom QR= (10x+10) SAYS: a)find X b)is the triangle equilateral, isosceles, or scalene? explain. We have not done this

asked by lilman on May 23, 2012
88. ## Physics

Hello, I need some help with this physics problem. This was the only one I couldn't solve, and the teacher wouldn't help me because she wanted me to figure it out for myself, just like everyone else tried. (Although no one did) Here is the question: Type

asked by Albert on November 1, 2016
89. ## algebra II

How do you know if a quadratic equation will have one, two, or no solutions? How do you find a quadratic equation if you are only given the solution? Is it possible to have different quadratic equations with the same solution? Explain. Provide your

asked by hollywood on June 15, 2010
90. ## algebra II

How do you know if a quadratic equation will have one, two, or no solutions? How do you find a quadratic equation if you are only given the solution? Is it possible to have different quadratic equations with the same solution? Explain. Provide your

91. ## Trig

Jessica attains a height of 4.7 feet above the launch and landing ramps after 1 second. Her initial velocity is 25 feet per second. To find the angle of her launch, which equation can you use with the given information to solve for θ? (Answer: 1 or 2).

asked by Jessica on June 21, 2012
92. ## CHEM!

Well I almost understand this question but still got stuck, I will show you the question and my answer so I need someone to tell me if I did it correctly or not and how I should fix it. at 55degrees the K for the reaction: 2NO2(g)N2O4 is 1.15 calc the

asked by Linda on May 2, 2007
93. ## Algebra

1.What is the solution of the system? y=9x-2 y=7x+3 A.(-5/2,41/2) B.(5/2,41/2) C.(5/2,-41/2) D.(-5/2,-41/2) 2.The table below shows the height (in inches) and weight (in pounds)of eight basketball players. Height=67, 69, 70, 72, 74, 78, 79 Weight=183, 201,

asked by GummyBears on December 16, 2015
94. ## Physics "Simple" Energy Problem

Jonathan is riding a bicycle and encounters a hill of height 6.70 m. At the base of the hill, he is traveling at 5.00 m/s. When he reaches the top of the hill, he is traveling at 3.00 m/s. Jonathan and his bicycle together have a mass of 77.6 kg. Ignore

asked by PersonWhoNeedsHelp on November 8, 2015
95. ## Physics

A 9.7-kg watermelon and a 7.1-kg pumpkin are attached to each other via a cord that wraps over a pulley, as shown. Friction is negligible everywhere in this system. The angle beneath the pumpkin is 53 degrees and the angle beneath the watermelon is 30

asked by Ammora on October 10, 2010
96. ## chemistry

Suppose that 2.25 grams of CuSO4 are dissolved in 930 mLs of 0.30 M ammonia. What concentration (Molarity) of Cu2+ ion is expected to be free in the aqueous solution and not bound to ammonia in the complex ion Cu(NH3)42+? The Kf for Cu(NH3)42+ is 5.0 x

asked by Anonymous on April 7, 2013
97. ## physics

1.5 kg of an unknown liquid at a temperature of 17 degrees Celsius is added to 2kg of water at 50C. The final temp of the mixture is 45C. Assuming no heat is lost to the environment, determine the specific heat capacity of the unknown liquid. So I assume

asked by tristan on April 17, 2017
98. ## Science

you draw a 100kg sack of maize meal across the floor of a warehouse for the distance of 10m. You apply a force of 300N, directed at an angle of 30 degree to the floor. a) If the floor is frictionless, how much work do you do on the bag? b) If the

asked by Akkie on June 2, 2010
99. ## S.A.T Math

I do not understand This: Employee x is paid \$12.50 an hour for the first 36 hours he works in a week, and is paid double that rate for every hour over that. Employee Y is paid \$15.00 an hour for the first 40 hours she works in a week, and is paid 1.5

asked by Mack on August 27, 2007
100. ## Dr Bob

What is the pH of the solution that results from mixing 5 ml of 0.2 M NaOH and 100 mL of 0.05 M lactic acid? (Pka of lactic acid= 3.86) Responses Use the Henderson-Hasselbalch equation. The mixture you have indicated will react to form a buffer, the base

asked by Andrew on January 11, 2009