# 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 744
1. ## statistics

5. There is some indication in medical literature that doctors may have become more aggressive in inducing labor or doing preterm cesarean sections when a woman is carrying twins. Records at a large hospital show that of the 43 sets of twins born in 1990,

asked by LT on November 5, 2007
2. ## SOCIAL STDIES HELP!

Clyde is appearing before a judge today because he has missed 30 days of school this year without any medical excuse. Clyde is best described as (1 point) a juvenile delinquent. an unruly child. a deprived child. a guardian ad litem.*** 7. In which of the

asked by XenaGonzalez on March 2, 2015
3. ## U.S Hisotry. Please check my answers.

Why is the United States often referred to as the melting pot? -Various cultures from many countries have "melted" together to create what America is and how American culture is defined today** -Most American citizens' native customs and traditions will

asked by Dani on November 20, 2015
4. ## Pre-Algebra

Can someone please show me how to do these problems? I've been trying but I'm having a hard time... 1.Simplify the expressions on each side of the equation to obtain an equivalent equation: 5x + 12 + 4x -16= 100/2 2.Angles UVW and angles XYZ are

asked by mysterychicken on May 2, 2009
5. ## Science

Luis created a clay model of earth and the sun to show how earth rotates, Luis wants to use a toothpick to represent earths axis of rotation Where should he put the toothpick A - horizontally through earth in the direction earth is traveling B - vertically

asked by Unicorn on December 11, 2016
6. ## Science

Luis created a clay model of earth and the sun to show how earth rotates, Luis wants to use a toothpick to represent earths axis of rotation Where should he put the toothpick A - horizontally through earth in the direction earth is traveling B - vertically

asked by Unicorn on December 10, 2016
7. ## Pre-Cal (Trig) Help?

The following relationship is known to be true for two angles A and B: cos(A)cos(B)-sin(A)sin(B)=0.957269 Express A in terms of the angle B. Work in degrees and report numeric values accurate to 2 decimal places. So I'm pretty lost on how to even begin

asked by Giovanni on May 6, 2016
8. ## Art

Which step below is one that a conservator must take to preserve or restore art? 1.Repair the artwork using untested methods. 2.Leave a fragile piece of artwork on display for viewers to handle and touch. 3.Keep all art away from viewers for fear that it

asked by Help I need somebody not just anybody on January 26, 2017
9. ## math

Find the age, to the nearest month, of the people in your class. Use the average age in months as your zero and positive and negative numbers to write the age of each person in relation to the average. Work in a group to find a good visual way to display

asked by bb on December 13, 2010
10. ## world literature

the story "My financial Career" (text pp. 336-378) and the "" the work of one day is gazed upon for one thousand days" ( text pp. 257-263 ) deal with the similar subject matter of finance and business; however, the tone is these stories differs. Contrast

asked by Shawnda on July 25, 2012
11. ## US History Project

I have a US History project that's due... I have to make a map of North America in 1756 with: -20 major European settlements -French, Spanish, English colonizations -Native American Tribes -20 major geographical features And, I'm in really big trouble.

asked by Kune on September 4, 2006
12. ## Math

A cafeteria manager needs to know how many apples and bananas to place in a cafeteria vending machine. He conducted a survey, and all students who respended chose either an apple or banana as their preferred fruit. The survey results show that 3/4 of the

asked by Jessica on April 4, 2013
13. ## Biochemistry

Show Calculations used in mkaing 250mL of 0.5M sodium acetate ph 4.7. You are given: 1M acetic acid (weak acid) 1M sodium hydroxide (strong base) Sodium acetate buffer: ph 4.7 acetic acid pKa: 4.7 So far this is what I've gotten: pH = pKa + log (A-/HA-)

asked by Tahlia on March 13, 2017
14. ## Chemistry

How can you solve for a derived unit involving density? I don't know what you mean. Density is a derived unit, no mater what the units used are. Do you have an example of what you are doing? Yes. What is the mass of a sample of material that has a volume

asked by Whitney on January 18, 2007
15. ## Physics

A block of mass m1 = 22.0 kg is connected to a block of mass m2 = 40.0 kg by a massless string that passes over a light, frictionless pulley. The 40.0-kg block is connected to a spring that has negligible mass and a force constant of k = 260 N/m as shown

asked by Anonymous on March 12, 2013
16. ## Social Studies

How do low literacy rates relate to the economy of a country? 1. They are associated with lower levels of education, which reduce economic development.* 2. They are associated with higher levels of education, which increase economic development 3. They are

asked by Jessie on November 5, 2015
17. ## Chemistry

4. 5.6 x 10-6 mol of A and 5 x 10-5 mol of B are mixed in a 200 mL flask. The system is represented by the equation: 2A + B --> 3C I 2.8x10-5 M 2.5x10-4 0 C -2x -x +3x E 2.8x10-5-2x 2.5x10-4-x 3x10-5 B = 2.5x10-4-x = 2.4x10-4 x = 1x10-5 A =

asked by Katie on May 17, 2012
18. ## business communication

please help me to revise this paragraph I’m contacting you about your recent email request for technical support on your cable internet service. Part of the problem we have in tech support is trying to figure out exactly what each customer’s specific

asked by JP on February 17, 2017
19. ## Algrbra I

Help!! I do not understand how to work these types of problems. My instructor gives us really long formulas and charts for these and i don't get it!! Im good at algebra, I have an A in the class, so this is irritating to me! The radiator in a certain make

asked by Nicole on February 8, 2012
20. ## science

PLEASE HELP GUYS An ideal gas for which Cv = 3R/2 is the working substance of a Carnot engine. During the isothermal expansion, the volume doubles. The ratio of the final volume to the initial volume in the adiabatic expansion is 5.7. The work output of

asked by juniah on April 3, 2014
21. ## Question! Pls answer

Did ypu know that six Canadian prisons have tattoo shops? How would u explain this fact? Pls help. Thanks I didn't know that. But tattoos are very popular with many people now. The tattoo shops help train the inmates to make a living work in tattoo shops

asked by May on March 8, 2007
22. ## Early childhood education

Julie has a speech delay and is often shy with other children. The best way to include her in your daily group activities is to a)ask a volunteer to provide her with individual attention b)provide her with some books to read while you work with other

asked by Donna on August 14, 2011
23. ## Career Plz help................

1. Jovanna has determined that she wouldn't want to be a nurse because she really doesn't like the sight of blood and she tends to not work well under pressure. Which stage of career matching is she in? eliminating options that doesn't match her

asked by Labbayk on November 17, 2015
24. ## calc 2

A spherical tank of radius a feet is buried in the ground. The top of the tank lies b feet below the surface of the ground.(δ=64lbs/ft^3)Find a definite integral whose value equals total work done in emptying the tank through a pipe whose opening is at

asked by josh on November 15, 2015
25. ## Math

Can you Check my work please? Let N(t) be the number of bacteria after t days. Then N(t) = Pa^t for some constants P and a. Measurements indicate that N(4) = 5600 and N(8) = 362, 000. b. Write down two equations for P and a, one when t = 4 and the other

asked by Walt on February 13, 2012
26. ## physics

Camping equipment weighing 6000 N is pulled across a frozen lake by means of a horizontal rope. The coefficient of kinetic friction is 0.05. The work done by the campers in pulling the equipment 1000 m at constant velocity is: We never utilized friction

asked by Spider on October 13, 2010
27. ## chem HELP PLEASE its physics side of chem

given E, = l^2 h^2 / 2 m r^2 calculate energies for an electron localised to a circle of radius 2 x 10^-9 m for l = 0,1,2, draw pictures of three levels and calculate the relative populations of these levels at 300K i did the first bit but came out with,

asked by poppy on October 27, 2009
28. ## HR outsourcing

What are the top 4 issues that one should research before making the HR outsourcing decision in an organization I don't know what your book says -- but it seems to me that the top issues are: 1. Will the outsourcing provide the same or better service for

asked by Mandy on August 3, 2006
29. ## physical chemistry PLEASE HELP!!!

given E, = l^2 h^2 / 2 m r^2 calculate energies for an electron localised to a circle of radius 2 x 10^-9 m for l = 0,1,2, draw pictures of three levels and calculate the relative populations of these levels at 300K i did the first bit but came out with,

asked by poppy on October 28, 2009
30. ## History of health care

Please check my answer thanks :) You own a company in a state where state funds are not mandated for employee health insurance. What is an option for providing your employees health care coverage for work related injuries I am not to sure about this one I

asked by Ashyleah on February 19, 2008
31. ## ECONOMICS

College students sometimes work as summer interns for private firms or for the government. Many of these positions pay very little or nothing. What is the opportunity cost of taking such a job? Explain why students might be willing to take such jobs. If

asked by RAJA on April 13, 2013
32. ## Physics

A cubic meter of some material has a mass of 6400 kg. The block of material is lowered into a lake by a strong cable until the block is completely submerged. Draw a free-body diagram for the block. (Do this on paper. Your instructor may ask you to turn in

asked by Tyler on March 31, 2014
33. ## social studies-Ms. Sue

"Immigrants have frequently been accused of taking jobs from "real" Americans. Politicians who oppose immigrants often use this as a reason. The problem with this argument is that many immigrants work very hard for minimum (or lower) wage that doesn't

asked by Abigail on October 22, 2007
34. ## Physics

A water-skier is being pulled by a tow rope attached to a boat. As the driver pushes the throttle forward, the skier accelerates. A 63.6-kg water-skier has an initial speed of 5.3 m/s. Later, the speed increases to 10.8 m/s. Determine the work done by the

asked by Gabby on November 8, 2011
35. ## physics/chem

given E, = l^2 h^2 / 2 m r^2 calculate energies for an electron localised to a circle of radius 2 x 10^-9 m for l = 0,1,2, draw pictures of three levels and calculate the relative populations of these levels at 300K i did the first bit but came out with,

asked by poppy on October 27, 2009
36. ## classroom management better understanding plz

• Select one challenge for a teacher, and one challenge for a student. • Explain in 200 to 300 words which strategies you would use to mediate those selected challenges posed by seatwork Collecting, correcting, recording, and returning seatwork

asked by scooby on May 7, 2010
37. ## stastic

A can of Coke is supposed to contain, on the average, 16 ounces of soda with a standard deviation of 0.4 ounces. Suspecting fraud, you take a random sample of 50 cans and measure the amount of Coke in each. Your measurements show that the 50 cans had a

asked by kima on April 18, 2014
38. ## materials science

A bar of pure nickel is coupled with a bar of pure iron (interfaced). The diffusion couple is then heated to a temperature of 1000°C. (a) How long will it take for the concentration of nickel to reach 0.1 wt%, 1.0 μm below the interface? (b) How long

asked by Bob on February 6, 2012
39. ## Physics

A 570.0 g ball moves in a vertical circle on a 103.0 cm-long string. If the speed at the top is 4.30 m/s, then the speed at the bottom will be 10.65 m/s. (you'll learn how to show this Chapter 10.) What is the gravitational force (in N) acting on the ball?

asked by :( on October 17, 2011
40. ## Chemistry

Help please!!! Complete the two reduction half reactions for the cell shown at the right, and show the line notation for the cell by dragging labels to the correct position. (The electrode on the left is the anode, and the one on the right is the cathode.)

asked by shanonn on May 6, 2013
41. ## Physics

One object is thrown straight up at 54.9 m/s from the ground at the base of a building with is 157.9 meters tall. At the same time the object is thrown up at the bottom of the building, another object is thrown straight down at the top of the building. If

asked by Kimmy on September 24, 2014
42. ## Physics

I think I chose the correct answer. In a closed system, two carts have a compressed spring between them. One of the carts has a total mass, including its contents, of 2.0 kg, and the other has total mass of 1.0 kg. Which cart experiences the momentum

asked by Laura Khoshaba (Me and I) on February 3, 2014
43. ## Creating High-Quality CentersCreating High-Quality

To enhance children's creativity, it's best to do which of the following? A. Teach children techniques and the proper use of tools as they're developmentally ready B. Teach children the correct way to draw an item such as a person C. Use a hands-off

asked by Priscila on March 14, 2017
44. ## Creating High-Quality Centers

To enhance children's creativity, it's best to do which of the following? A. Teach children techniques and the proper use of tools as they're developmentally ready B. Teach children the correct way to draw an item such as a person C. Use a hands-off

asked by Priscila on March 14, 2017
45. ## Science

Name the components of the respiratory system in the order incoming air would encounter them during breathing. A. trachea, pharynx, larynx, alveoli, bronchi B. bronchi, larynx, alveloi, trachea, pharynx C. larynx, trachea, bronchi, pharynx, alveoli D.

asked by Anonymous on February 2, 2014
46. ## Science

Name the components of the respiratory system in the order incoming air would encounter them during breathing. A. trachea, pharynx, larynx, alveoli, bronchi B. bronchi, larynx, alveloi, trachea, pharynx C. larynx, trachea, bronchi, pharynx, alveoli D.

asked by Anonymous on February 2, 2014
47. ## Chemistry

Automobile batteries contain sulfuric acid, which is commonly referred to as "battery acid." Calculate the number of grams of sulfuric acid in 0.650 L of battery acid if the solution has a density of 1.28 g/mL and is 38.1% sulfuric acid by mass.

asked by Anonymous on August 18, 2013
48. ## UIC

Calculate pCd2 at each of the following points in the titration of 55.00 mL of 0.0020 M Cd2 with 0.0020 M EDTA in the presence of the auxiliary complexing agent NH3. The solution is buffered at a pH of 11.00. Take the NH3 concentration to be a constant

asked by achut on July 18, 2013
49. ## Chemistry

Sodium chloride dissolves in water (solubility in water is 361g/1L), but copper (II) phosphate does not dissolve in water (insoluble). A. Describe in a stepwise fashion how the solid sodium chloride dissolves in the water to form a solution. (name the

asked by Anonymous on December 8, 2015
50. ## Chemistry

What is the vapor pressure in Torr above a solution prepared by mixing 66.73g of benzene C6H6 with 63.26g toluene C6H5CH3 at 20 Celsius. The vapor pressure of pure benzene and toluene at 20celsius are 75 and 22 torr respectively. These compounds form

asked by Jude on April 23, 2011
51. ## acid and base titrations

25.00 mL of a solution of HCL was titrated with 0.4500 M NaOH using the indicator bromthymol blue. Successice readings of the burette gave the following data: colour: Volume of NaOH (mL)= i.) 16.35 yellow ii.) 16.40 yellow iii.) 16.45 green iv.) 16.50 blue

asked by jj reddick on November 21, 2010
52. ## Chemistry Lab

What would happen to the reaction rate of a solution if 10 mL or more of water is added? Will the reaction rate increase or decrease? The following reaction occurs without a change in the color 2A (g) + B2(g) --- 2AB (g) a) How could you monitor the

asked by Sunshine on July 20, 2009
53. ## Chemistry Lab

What would happen to the reaction rate of a solution if 10 mL or more of water is added? Will the reaction rate increase or decrease? The following reaction occurs without a change in the color 2A (g) + B2(g) --- 2AB (g) a) How could you monitor the

asked by Sunshine on July 20, 2009
54. ## Chemistry

What is the balanced net ionic equation for the reaction between the permanganate ion and the ferrous ion in acid solution. What is the number of moles of ferrous ion that could be oxidized by 1.2×10^-2 moles of permanganate ion? Honestly don't understand

asked by Minset on October 4, 2015
55. ## Chemistry

I did a lab in which I added ionic solutions to tap and distilled water and another ionic solution. Distilled water is the control because it does not react to any solutions since it doesn't contain ions. But one of the lab questions I need to answer is:

asked by Fred on November 16, 2008
56. ## chemisty

115 grams of KCl is dissolved in 750 ml of water. what are the molality, molarity, mole percent, % mass, ppm by mass. what would the freezing point and boiling point of that solution assuming Kf of water is 1.86 degree celsius/m and Kb is .0512 degree

asked by shaknocka on February 7, 2011
57. ## math

your school is putting on a prom fashion show, and you are in charge of building a platform to serve as a stage. Main stage is a rectangle and the runways is a square. the length of the main stage is three times the length of the runway and the width of

asked by Laura on November 26, 2016
58. ## math

t shirt company makes polo shirts with expectation that it will earn a profit of 50% by selling each shirt at its marked price.but during delivery to show rooms,17% of shirts were completely solied and hence could not be sold, 18% of shirts were slightly

asked by kiran on August 4, 2017
59. ## Physics please help! check if its correct

A 3.00 kg stone is tied to a thin, light wire wrapped around the outer edge of the uniform 8.00 kg cylindrical pulley. The inner diameter of the pulley is 60.0 cm, while the outer diameter is 1.00 m. The system is released from rest, and there is no

asked by Brit on February 26, 2012
60. ## SS

1. The U.S. Constitution calls for how many branches of government? (1 point) two three*** four five 2. Which of the following responsibilities are held by the legislative, rather than the executive, branch? Select all that apply. (2 points) writing and

asked by Check Answers on October 18, 2016
61. ## math

Fupi used 0.2 of his salary,sh 32,800 per month for school fees,quarter of the remained amount,he deposited at the bank and the rest amount used for other expenses.How much were used for other expenses?#######please anyone one to help me with the

asked by kelvin on September 14, 2016
62. ## Chemistry

What is the mass/ vol% ethanol in an ethanol water solution with density of 0.875g/ml and containing 65% ethanol by volume? The density of pure ethanol is 0.789g/ml? My calculation 0.875g/ml x 1000ml x 0.65/ 46.06 = 12.34m 12.34/0.789g = 15.6g I am not

asked by Fai on August 18, 2012
63. ## Chemistry

Calculate the pH of 7.2 × 10-8 M HCl. Report your answer to the hundredths place. Next, What fraction of the total H in this solution is from the HCl? Report your answer to the hundredths place. I apologize for the re-post, but I felt the previous one was

asked by Chris on September 27, 2012
64. ## Biology

The problems of survival of animals on land are very different from those of survivial of animals in an aquatic environment. Describe four problems associated with animal survival in terrestrial environments but not in aquatic environments. For each

asked by Neil on March 18, 2012
65. ## chemistry

When aqueous solutions of chromium(III) bromide and potassium phosphate are combined, solid chromium(III) phosphate and a solution of potassium bromide are formed. The net ionic equation for this reaction is:

asked by Anonymous on March 13, 2016
66. ## Chem2

The vapor pressure of water (at 50.0 o C) is lowered by 17.0 torr when 36.1 g of an unknown non-electrolyte is added to 65.56 g water. Determine the molecular weight of the unknown. Density solution = 1.05 g/mL Vapor pressure H2O @ 50oC = 92.5 torr

asked by Laura on August 31, 2016
67. ## chemistry

the Ka for acetic acid, HC2H3O2, is 1.8x10-5 at 25 deg. Celsius. In a .10 M solution of potassium acetate, which of the following are true? I. [HC2H3O2] = [OH-] II. [H+] = [OH-] III. [C2H3O2-] < .10 M a. I only b. II only c. III only d. I and II e. I, II

asked by Anonymous on April 22, 2007
68. ## Chemistry

The normal freeing point of cyclohexane if 6.6 degrees Celsius. A 0.2g sample of an unknown solute is dissolved in 50 ml of cyclohexane (d-0.8g/ml, Kf=20 degreesCelsius/m. If the freezing point of the solution is 3.6 degrees Celsius, what is the molar mass

asked by Karolina on March 2, 2011
69. ## Chemistry

A solution contains 0.0500 M Ca2 (aq) and 0.0350 M Ag (aq). What will be the concentration of Ca2 (aq) when Ag2SO4(s) begins to precipitate? What percentage of the Ca2 (aq) can be separated from the Ag (aq) by selective precipitation? -Solving the 1st one

asked by Jematormal91 on April 6, 2012
70. ## Chemistry

A 5.0-g Sample of KBr at 25.0 degrees celsius dissolves in 25.0 degrees celsius 25.0 mL of water also at 25.0 degrees celsius. The final equilibrium temperature of the resulting soltution is 18.1 degrees celsius. What is the enthalpy of of solution in

asked by Sally on December 2, 2010
71. ## chemistry

Bromine can be added to limonene to created a brominated compound. The balance equation is shown below. When 613 mg of limonene and 3.5 ml of a 10% (v/v) solution of Br2 in dicholomethane (a solvent) are combined, 959 mg of the product is isokated.

asked by bk on February 20, 2010
72. ## physics

A point charge with charge q1 is held stationary at the origin. A second point charge with charge moves from the point (x1,0) to the point (x2,y2). How much work is done by the electrostatic force on the moving point charge? Express your answer in joules.

asked by Cassie on January 24, 2011
73. ## Statistics

In Professor White’s statistics course the correlation between the students’ total scores before the final examination and their final examination scores is r = 0.9. The pre-exam totals for all students in the course have mean 275 and standard

asked by Kevin on October 21, 2012
74. ## P. Chemistry

A solution of HNO2 is at equilibrium: HNO2(aq) + H2O(l) ⇔ H3O+(aq) + NO2-(aq) Water is added. After the water is added, is there any shift in the equilibrium?

asked by Tommy on March 8, 2010
75. ## Chemistry

A solution with pH = 4 has 1. relatively high concentration of OH- 2. relatively low concentration of H3O+ 3. relatively high concentration of H3O+ 4. zero concentration of OH- Some of the answers people are giving me are confusing. I just need to know if

asked by nan on October 22, 2011
76. ## math

A farmer has \$100.he has to buy 100 farm animals.He has to spend exactly \$100 and get exactly 100 farm animals. Whats a solution for this problem

asked by Francisca on May 18, 2010
77. ## Chemistry

How many grams of CaCl2 are needed to prepare 25.0 mL of .500 M solution? and What volume of 12.00 M HCL is needed to prepare 150.0 mL of .500 M HCL?

asked by Erin on April 17, 2017
78. ## Math

Find the solution. 1. sqrt2 sin x + 1 = 0 My ans: x = 5pi/4 + 2npi and 7pi/4 + 2npi 2. sec x - 2 = 0 My ans: x = pi/3 + 2npi and 5pi/3 + 2npi

asked by Anonymous on October 25, 2015
79. ## Physics

I have the following exercise: Verify that Ex=f(z-ct)+g(z+ct) is a solution of the one dimensional wave equation. But I don't get what I should do, I mean, isn't Ex the formula of the one dimensional wave equation itself? U.U How can I verify it? Thank

asked by Waves - AEC on March 8, 2018
80. ## annatomy

Calculate the osmolarity of a solution that contains 0.1 M urea, 0.2 M NaCl, and 0.5 M CaCl2. Assume urea does not ionize and NaCl and CaCl2 ionize completely

asked by russel on November 29, 2010
81. ## CHEMHelp

Now sure how to do this! 1. DESCRIBE & CALCULATE how to make 750. mL of a 1.25 M sucrose solution 2. Concentrated HCl has a molarity of 12 M. DESCRIBE & CALCULATE how to make 1.50 L of a 3.00 M HCl.

asked by Lina on January 26, 2017
82. ## Chemistry

I need to know if I am anywhere in solving this problem: Please tell me if this is correct. The pH of a solution: 0.20 M CH3COOH and 0.10 M CH3COONa pH=pKa+log{[CH3COONa]/[CH3COOH]} pH= -log(1.8x10-5)+log{0.10/0.20} pH= 4.74+log 0.50= 4.74-0.30= 4.44

asked by curtis on May 6, 2010
83. ## Math: Trigonometry

Quadrant III, csc(theta)= -1.25, find tan(theta) Quadrant IV, sec(theta)= 4/3, find cot(theta) Please provide the work for both. Thank you!

asked by Arthur on June 1, 2017
84. ## English

9.Raphael has been practicing karate since the age of ten helping:has been main:practicing 10.Your hard work will not be wasted helping:will be main;wasted

asked by Jerald on October 10, 2012
85. ## Math grade 4

Write a number pattern for 6 starfish if each had five arms. How many arms would those starfish have in all? Final number I am trying to get is 30. Can't get any definite pattern to work. Applying 1,2,3,5,6...pls help!!

asked by Irena on August 19, 2015
86. ## algebra2/trig

tina can paint a room in 8 hours, but when she and her friend emily work together, they can complete the job in 3 hours. how long would it take emily to paint the room alone?

asked by jackie on February 26, 2011
87. ## Calc 2

a. Integral (x^2)/(sqrt(1+(x^2))) Would I separate these two into 2 separate integrals? Like: Integral of x^2 and the other integral of 1/sqrt(1+(x^2)) b. Integral (x^7)/(ln(x^4))dx Do I use integration by parts for this? I put u= lnx du = 1/x dv = x^7 v =

asked by Bae on May 3, 2014
88. ## physics

A 0.60 kg object with an initial velocity of 3.0 m/s in the positive x direction is acted on by a force in the direction of motion. The force does +2.5 J of work. What is the final velocity of the object?

asked by Anonymous on February 12, 2010
89. ## physics

Two point charges are located as shown in the figure, with charge q1 = +3.2 C at x = − 3.0 m, y = 0, and charge q2 = +2.5 C at x = +1.0 m, y = +2.0 m. An electron is now taken from a point very far away and placed at the origin. How much work must be

asked by melody on September 29, 2010
90. ## Physics

a 2.00 kg object has a velocity of 4.00i -3.00j m/s. What is the kinetic energy at this moment? What is the net work done on the object if its velocity change 6.00i +2.00j m/s

asked by Anonymous on March 21, 2015
91. ## physics

A 0.60 kg object with an initial velocity of 3.0 m/s in the positive x direction is acted on by a force in the direction of motion. The force does +2.5 J of work. What is the final velocity of the object?

asked by Anonymous on February 8, 2015
92. ## math

Jon buys £4000 of shares. In the first year the shares increase in value by 8%. In the next two years the shares decrease in value by 5% each year. Work out the value of the shares at the end of the three years.

asked by HS on October 23, 2013
93. ## calculus

i have a problem figureing out this question do you have any help? need to find the input and output of these numbers input 2 & output 9, input0 & output7, input-9 & output-2, input-20 & output-8 nothing seems to work. help me please

asked by dylan on February 28, 2008
94. ## Physics

Tim and Ray have the same mass and they both climb up the same hill. Tim climbs the hill in 12 minutes and Ray in 22 minutes. a) Who does more work? b) Who develops the most power?

asked by Becky on March 21, 2012
95. ## calculus

The limit as x approaches infinity of (e^x+x)^(1/x). I got that it diverges, but I'm not sure if I made a mistake. My work: lim(e+x^(1/x)) lim(e+(1/x^x)) lim(ex^x+1)/x^x l'hopital:lim(e^(e(lnx+1))+1)/e^(lnx+1) diverges?

asked by Dave on September 1, 2010
96. ## physics

A person pulls a toboggan for a distance of 30.0 m along the snow with a rope directed 20.0° above the snow. The tension in the rope is 85.0 N. (a) How much work is done on the toboggan by the tension force?

asked by Anonymous on December 4, 2010
97. ## Algebra 2

Find the inverse of the following function: f(x) = 3x + 12 I don't think I worked this problem off correctly...I am suppose to find the inverse of the function Is this the correct way to work this problem? y= 3x + 12 x= 3y + 12 3y = x - 12 f-1(x) = x -

asked by Greg on April 18, 2012
98. ## math

sean takes 8 hours to stain a deck then michelle. together it takes them 4.2 hour to complete the work. how long would it take sean to stain the deck by himself

asked by Regina on March 12, 2013
99. ## Physics

A person pulls a toboggan for a distance of 37.2 m along the snow with a rope directed 25.4° above the snow. The tension in the rope is 84.1 N. How much work is done on the toboggan by the tension force?

asked by Fallon on April 30, 2010
100. ## physics

A child does 350 J of work while pulling a box from the ground up to his tree house with a rope. The tree house is above the ground. What is the mass of the box?

asked by anthony on October 18, 2014