# 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 611
1. ## physics

A Gardner moves a lawn roller through a distance of 100 m . with the force of 50 Newton . calculate his wages if he is to be paid 10 paise for doing 25 joules of work . it is given that the force is inclined at 60^°in the direction of motion.

asked by Arzoo on August 16, 2016

What materials/resources do I need to do a training seminar on sexual harassment and unlawful discrimination in the work place? This is for an exam I am taking through Penn Foster... This is a written exam and does not have any "questions". I only need the

asked by Suzanne on March 13, 2010
3. ## English

please check my answer thanks :) What is this sentence missing and where ? One day my dad and his brother stop me if you've heard this story started on what they thought would be an uneventful drive to work. I thinks it's missing commas

asked by Anonymous on November 11, 2007
4. ## Physics

If an object is hung from a cable with a weight of 40 N, what is the tension in the two cables? I got some answers, but it would be best if I knew if I was doing the problems correctly before I do the rest of the worksheet. I did a bunch of work, but it's

asked by Katie on December 2, 2009
5. ## physic

A hand-driven tire pump has a piston with a 2.50 cm diameter and a maximum stroke of 30 cm. how much work do you do in one stroke if the average gauge pressure is 2.40×105 N.m – 2? Select one: a. 141 J b. 4.5×107 J c. 35.3 J d. 1.41 ×108 J

asked by lana on May 26, 2016
6. ## physics

A 4.62 x 10-5 kg raindrop falls vertically at constant speed under the influence of gravity and air resistance. After the drop has fallen 83.7 m, what is the work done by gravity? Answer in units of milliJoule (a thousandth of a Joule) and use 9.8 m/s2 for

asked by hannah on September 16, 2011
7. ## physics

A person opens a door by applying a 11-N force perpendicular to it at a distance 0.90m from the hinges. The door is pushed wide open (to 120 ∘ ) in 2.2s How much work was done? What was the average power delivered?

asked by john on June 3, 2015
8. ## calculus

A variable force of 7xâˆ’2 pounds moves an object along a straight line when it is x feet from the origin. Calculate the work done in moving the object from x = 1 ft to x = 19 ft. (Round your answer to two decimal places.)

asked by cynthia on March 15, 2017
9. ## college

Consider how employers and fellow team members could use this instrument at work. Is this test reliable? Is it valid? What are the potential benefits and drawbacks of a test that attempts to measure skills, abilities, or traits?

asked by Harley on June 12, 2009
10. ## Physica

(Please put the resulting figures and Thanks)))) a man pushes a box of mass 5 kg in a horizontal direction by 10 N force on the surface through a distance of 5m if the cofficien of kinetic friction is 0.2 the total work done on the box is

asked by 19191919 on July 16, 2012
11. ## Pre-Cal

A penny is dropped from the top of Bank of America building. How long does it take to reach the group? Assume the back is 1024 ft high. My work so far: -16t^2+0t+1024 t=8 sec Is this correct? Thanks!

asked by Rosie on September 14, 2015
12. ## pyschology

Consider how employers and fellow team members could use this instrument at work. Is this test reliable? Is it valid? What are the potential benefits and drawbacks of a test that attempts to measure skills, abilities, or traits?

asked by Harley on June 12, 2009

what amortization payment would be required every month, at 12% interest, to pay off a $125,000 mortgage in 10 years? round your answer to the nearest cent. can you work the steps to this problem for me so i can see the problem clearly? asked by lindaemory on December 5, 2012 14. ## Physics Suppose in the figure blow that +1.00 103 J of work is done by the force F with arrow (magnitude = 30.0 N) in moving the suitcase a distance of 51.0 m. At what angle θ, counterclockwise from the x-axis, is the force oriented with respect to the ground? asked by Anon on October 3, 2014 15. ## college physics An airline passenger pulls a wheeled suitcase, exerting a force of 60N, at a 35º angle with the horizontal. How much work does she do on the suitcase in pulling it 45m from a taxi to the checkout counter? asked by Adam on May 14, 2010 16. ## Legal Aspects of Health Information Jane Doe does not want her violent boyfriend to know shes getting an abortion. She asks Dr. John to send all communications to her to a post office box and to only call her at work. What should Dr John do, and what is the legal basis? asked by Ella on May 19, 2009 17. ## physics A person opens a door by applying a 11-N force perpendicular to it at a distance 0.90m from the hinges. The door is pushed wide open (to 120 ∘ ) in 2.2s How much work was done? What was the average power delivered? asked by john on June 3, 2015 18. ## physics A 3.56 x 10-5 kg raindrop falls vertically at constant speed under the influence of gravity and air resistance. After the drop has fallen 83.8 m, what is the work done by gravity? Answer in units of milliJoule (a thousandth of a Joule) and use 9.8 m/s2 for asked by Elisabeth on September 13, 2011 19. ## medical which one of the following statements is an example of hearsay? a)i saw the doctor administer the injection.b)i checked the patients blood pressure three times.c)the report said the patient died on january 15.d)the report was on my desk when i arrived for asked by kristie on August 14, 2010 20. ## Spanish Almost all students in Spanish-speaking schools ______ . a. learn a foreign language*** b. are under 13 years of age c. play at least one sport d. take at least two years of college Just checking my work:) *** - My Answer Thanks, Kaai97 asked by Kaai97 on November 9, 2015 21. ## Physics In a football game, a tackle running at a constant speed of 5 m/s tackles a stationary receiver. The two fly off horizontally at 4 m/s, before they hit the ground and begin to slow down. If the mass of the tackle is 105 kg, a.) What is the mass of the asked by Patrick Siy on March 22, 2010 22. ## Physics In a football game, a tackle running at a constant speed of 5 m/s tackles a stationary receiver. The two fly off horizontally at 4 m/s, before they hit the ground and begin to slow down. If the mass of the tackle is 105 kg, a.) What is the mass of the asked by Patrick Siy on March 22, 2010 23. ## Math 1. Abundance of starfish on a rock platform was studied by the quadrat method. The quadrat was a plastic frame with an area of 0.25 meter square. The rock platform was a rectangle approximately 20m x 30m. The numbers of starfish in 10 quadrat "drops" were: asked by MaebelXD on March 29, 2012 24. ## English What kind of work did you do as a volunteer? 1. I helped the handicapped take baths and have meals. 1-1. I helped an handicapped person take baths and have meals. 2. I went to a hospital and took care of patients there by taking them outside in wheelchairs asked by rfvv on November 25, 2009 25. ## o.chem I did an experiment for extraction of acetylsalicylic acid from an aspirin tablet(632mg mass). The solvent used was dichloromethane. I got about 342mg from the 500mg that could be extracted. the melting point found for this sample was 118-120°C as asked by Mary on May 23, 2009 26. ## behavior problems(dogs) please check my answer thanks Ideally, when working on a behavior problem, you'll show the owners ways to A. reorganize the environment so the dog has fewer chances to misbehave. B. discipline a dog correctly and not spoil him. C. teach some commands that asked by Kai on October 6, 2008 27. ## physics Two cars (A and B) of mass 1.1 kg collide. Car A is initially moving at 18 m/s, and car B is initially moving in the opposite direction with a speed of 9 m/s. The two cars are moving along a straight line before and after the collision. (Enter the asked by jake on January 24, 2017 28. ## math A town of 1200 people has "fan-out" system for emergencies. In an emergency the mayor phone two people. in the next minute each of these people phone two other people . the pattern continues until all 1200 people are contacted. complete yhe tableand asked by shaila on October 18, 2009 29. ## Physics Calculate the specific heat capacity of substance x from the following data. A container made of the substance x has a mass of 3.6kg and contains 14kg of water. A 1.8kg-piece of the substance x initially at the temperature of 180°C is dropped into the asked by Francis on November 20, 2017 30. ## Physics to be solved a horizontal scaffold, of length 2.00 m and uniform mass 50.0 kg, is suspended from a building by two cables. The scaffold has dozens of paint cans stacked on it at various points. The total mass of the paint cans is 79.5 kg. The tension in the cable at asked by zack on January 14, 2013 31. ## Calculate the oscillation frequency f of the H2 mo When displaced from equilibrium by a small amount, the two hydrogen atoms in an \rm H_{2} molecule are acted on by a restoring force F_{x}=-k_1 x with k_1 = 510 N/m. Calculate the oscillation frequency f of the H2 molecule. Use m_eff = m/2 as the asked by Tyler on April 15, 2010 32. ## Physics Jenn Suhr recently won the gold medal in this summer’s Olympic games in pole vault. Her record is 16 ft, 2 in. (She did less than that to win gold this summer.) If all of her gravitational potential energy came only from her kinetic energy, calculate (in asked by Chad on August 8, 2012 33. ## policial science I have to do an interview so can you guys help me out answering these questions? I need atleast 2 person's oppionion 1- do you agree with the Bush Administration policy of spreading Democracy you and the world. 2- Do you how Bush agree w. handling the war asked by DeeDee on January 6, 2007 34. ## Social Studies Why are conflicts between the executive branch and legislative branches of a parliamentary system government unlikely to occur? A. parliament as a whole maintains strict oversight over the executive branch B. The executive branch is a part of the asked by Anastasia on August 15, 2016 35. ## Social Studies Why are conflicts between the executive branch and legislative branches of a parliamentary system government unlikely to occur? A. parliament as a whole maintains strict oversight over the executive branch B. The executive branch is a part of the asked by Anastasia on August 15, 2016 36. ## Materials Science & Physics Consider a tetragonal phase of which the lattice parameters satisfy c = 2a. Diffusivities of the phase were measured in two different directions as: 6.0x10-12 cm2/sec along [101] and 8.0x10-12 cm2/sec along [001]. (a) Determine the diffusivity tensor (Dij) asked by Jinwon on October 6, 2013 37. ## writing I'm Writing a Discursive Essay on the topic "is it more difficult to be a young person today then it was 50years ago", I have these main points: "we have technology but its brought us media pressue" "Better education system but with more pressue to succed" asked by khabo on February 19, 2012 38. ## algebra please ck. joe wants to spend 70. dollars at most and has 60 cu inches of space left in his soldier's care package. candy costs$7 and takes up 3 cu inch of space phone cards cost $5. and take up 15 cu in. of space. Is this correct? if not please change it or tell me asked by ann on February 16, 2012 39. ## Physics A golf ball is released from rest from the top of a very tall building. Choose a coordinate system whose origin is at the starting point of the ball, and whose y axis points vertically upward. The acceleration of gravity is 9.8 m/s^2. a.Neglecting air asked by Fabricus on February 9, 2014 40. ## math on a tv game show, the contestant is asked to select a door and then is rewrded with the prize behind the door selected. if the doors can be selected with equal probability, what is the expected value of the selection if the three doors have behind them a asked by Diana on July 29, 2009 41. ## Math Felisha worked at the library for three months.she earned$4,500.00 and must pay total of 15% in taxes,which includes federal withholding, Medicare, and social security taxes.What is her net pay? Show or tell how you got the answer A) $3,825.00 B) asked by Suzy Moler on February 23, 2015 42. ## Math On a TV game show, the contestant is asked to select a door and then is rewarded with the prize behind the door selected. If the doors can be selected with equal probability,what is the expected value of the selection if the three doors have behind them a asked by Lisa on May 18, 2010 43. ## Physics Take the radius of the earth's orbit to be 1.5 x 1011 m. a. Using a year to be 365 days, find the speed of the earth as it moves around the sun. __m/s b. Convert this speed to miles/hour (show your conversion factor in your written backup). __miles/hour asked by Kelly on March 5, 2012 44. ## Physics Two tiny similar balls, each of mass m kg & carrying charge q coulomb are hung from the same point by light silk threads each l meter long. At equilibrium the angle between the threads is very small and the separation of the balls is r meter. Show that R = asked by asdfg on April 18, 2015 45. ## mat117/algebra Rewrite the middle term as the sumof two terms and then factor completely. Please show me the formula and how to use it correctly. 12w^2 + 19w + 4 19w can be written as 16w + 3w. Those are the cross product terms when multiplying 4w times 4 and 3w times 1. asked by Diana on June 27, 2007 46. ## math Michaela makes original stationary to give away as gifts. She likes to put a small bow in the corner of each card. She purchased a piece of ribbon that was 3 1/4 ft long. She can make each bow out of 1/3 ft of ribbon. Which equation would be used to show asked by Jonathan on January 16, 2015 47. ## math Dr needs 500 needles priced at 2.60 per hundred. If he pays within 10 days, she receives a 2% discount, sales tax 5.5%. What amount would you pay with the discount? My math 2.60 x 500 needles =$13.00 $13.00 x 5.5% = 72cents 13.00 + .72 =$13.72 \$13.72 -

asked by LASTDAYS on May 13, 2010
48. ## data management gr.12

Tests show that the pressure, in pounds per square inch (Psi) required to break skate boards is normally distributed with a mean of 54.7 and standard deviation of 6.2 a)what is the probability that a board will require at least a pressure of 70 to break?

asked by Jenna on December 19, 2016
49. ## Math

Sammy likes to mix and match her 4 necklaces , 2 bracelets, and 3 hats. The colors are listed in the table. ON Monday, she randomly picks a bracelet, a necklace, and a hat. what is the probability of Sammy choosing a red necklace and a yellow bracelet. A.

asked by Blaire on May 19, 2017
50. ## soil chemistry

Can someone please help me answering this question regarding soil chemistry? A sandy soil has a CEC = 5 meq/100g and a K saturation = 6%. An alfalfa crop yields 5 ton/ac/yr at 3% K. Calculate initial exchangeable K and estimate final exchangeable K. Where

asked by Anonymous on November 6, 2015

Hello i have 2 questions in total. 1) The meteor enters the Earth’s atmosphere with an acceleration of approximately 9.7 m/s2 and with a force acting on it of 1.94 N. What is the mass of the meteor? Show your calculations. 2) Compare this value of the

asked by Ellioy on November 9, 2013
52. ## Physics

Horizontal velocity: 138ft/s Vertical velocity: 109ft/3 A ball is thrown at 95 mi/h. The distance from the mound to the plate is 60.5 ft. Assuming the ball is pitched parallel to the ground, how far does it fall due to gravity by the time it reaches the

asked by Jill on October 25, 2010
53. ## Maths

Please help with these questions: (please show how to do) 1. How many differently shaped rectangles, with positive integer dimensions, have a perimeter equal to their area? 2. Let x be any number less than one, and let y be any number greater than one. S=

asked by Mea C on February 3, 2010
54. ## Pre Cal/Vectors

Can someone show the steps involved in figuring out this type of problem? Given the magnitudes of vectors u and v and the angle Ό between them, find the magnitude of the sum u + v to the nearest tenth and the angle that the sum vector makes with u to the

asked by Joe on July 24, 2011
55. ## Science

4. Chlorine and bromine react by the equation​​Cl2(g) + Br2(g) D 2BrCl(g) Kc = 1.2 x 102 at 150oC. What are the equilibrium concentrations of each reactant and product if a 2.0 L container initially contained 0.026 mole each of Cl2 and Br2 at 150oC?

asked by Abay on October 3, 2013
56. ## Math

On a TV game show, the contestant is asked to select a door and then is rewarded with the prize behind the door selected. If the doors can be selected with equal probabiltiy what is the expected value of the selection if the three doors have behind them a

asked by Michelle on December 12, 2009
57. ## Statistics

When is it appropriate to draw a causal connection between two measurement variables? In other words, what conditions must be met in the study and in the analysis to show a causal relationship? My answer : 1.There needs to be a reasonable explanation of

asked by Mea on April 9, 2014
58. ## Math-Probability

This is another one I need help with. On a TV game show, the contestant is asked to select a door an then is rewarded with the prize behind the door selected. If the doors can be selected with equal probability, what is the expected value of the selection

asked by C.J on January 23, 2010

When an audience feels your message is unimportant to them, you should: a) use threatening language to show the seriousness of the matter b) make any action requested as easy as possible to accomplish c) avoid imposing deadlines for action d) make the

asked by Anonymous on March 31, 2009
60. ## MATH 157

On a TV game show, the contestant is asked to select a door and then is rewarded with the prize behind the door selected. If the doors can be selected with equal probability, what is the expected value of the selection if the three doors have behind them a

asked by Tyga on April 1, 2010
61. ## MATH Prob.

On a TV game show, the contestant is asked to select a door and then is rewarded with the prize behind the door selected. If the doors can be selected with equal probability, what is the expected value of the selection if the three doors have behind them a

asked by Twg on August 11, 2009
62. ## programming principles

Calculation of tax in Uzapia The United Nations have just recognised a new country called Uzapia. Uzapia has a currency called Zubies (ZB). The Uzapian tax system is highly simplified and meant to be fair. They have system where all their income is

asked by karabo on November 6, 2015
63. ## child day care management

Q; Bruno has been asked to list all of the use for a paper clip.This is an example of A;convergent thinking B;scaffolding C;conservation D;divergent thinking My answer is D but it might be B pls hellp me scaffold- support system that supports children as

asked by alex on February 13, 2011
64. ## chemistry

For each trial, enter the amount of heat gained by the chemical system of ammonium nitrate, qrxn. The specific heat of water is 4.184 J/goC. Report your answer using 4 digits. The information given is: Trial # Tiwater Tf Masswater #1: 21.2 10.8 24.990 #2:

asked by Megan on April 6, 2010
65. ## World History

I need definitions for all of these words...THANKS! Deccan Plateau “monsoons” Vedic & Epic Ages Sanskrit Rig-Veda Mahabharata Ramayana Upanishads “Indian caste system” (Kshatriyas, Brahmins, Vaisyas & Sudras) untouchables Chandragupta Maurya

asked by Anonymous on October 20, 2010
66. ## Social Studies CHECK ANSWERS

3. Which of the following sentences best describes the role of the United Nations in world affairs? A) it ensures that everyone follows treaties B) it maintains good relations and keeps discussions open*** C) it mediates conflicts and supports

asked by Batman on September 14, 2016
67. ## chemistry

What effect does raising the temperature of the reaction chamber at a constant pressure have on the following reaction at equilibrium? 2NO2(g) N2O4(g) + heat A. The equilibrium shifts toward the reactants because the reverse reaction is endothermic. B. The

asked by erika on September 15, 2016
68. ## AP Chem

For the following equilibrium system, which of the following changes will form more CaCO3? CO2(g) + Ca(OH)2(s) CaCO3(s) + H2O(l) deltaH(rxn) = -113 kJ My choices are: a) Decrease temperature at a constant pressure (no phase change) B) Increase volume at a

asked by Lisa on February 26, 2013
69. ## Science

3. Which of the following small bodies are the hardest to tell apart because they are made of similar materials? dwarf planets and comets asteroids and comets comets and meteoroids asteroids and meteoroids** A scientist examines a sample of an object from

asked by lifeisgreat on May 11, 2016
70. ## physics

Tony (of mass 75 kg) coasts on his bicycle (of mass 15 kg) at a constant speed of 4 m/s,carrying a 14 kg pack. Tony throws his pack forward, in the direction of his motion, at 6 m/s relative to the speed of bicycle just before the throw.What is the initial

asked by Anonymous on February 22, 2013
71. ## physics

A projectile is launched from ground level at 37.0 m/s at an angle of 30.6 ° above horizontal. Use the launch point as the origin of your coordinate system. a)How much time elapses before the projectile is at a point 8.9 m above the ground and heading

asked by Teddy on January 31, 2014
72. ## Chemistry - acid base

What volume of 10.0 M NaOH is needed to prepare a buffer with a pH of 7.79 using 31.52 g of TrisHCl? ( Tris. At 25 ∘C, Tris has a pKb of 5.91 ) a) The buffer from Part A is diluted to 1.00 L. To half of it (500. mL), you add 0.0250 mol of hydrogen ions

asked by K on March 9, 2018
73. ## maths - HCF

The product of HCF and LCM of two numbers is 119. Find the two numbers if one of the numbers is not 1. Please help me to solve this.

asked by RIYA on April 8, 2014
74. ## Algebra

( i need someone to check the answers for me or hep me with the right one ) Solve by using the quadratic formula. 8. x^2 + 7x -3= 0 answer: x= 7.40 and x=0.40 9. 5x^2 -8x -4=0 answer: x=1.49 and x=0.11 10. 3x^2 + x -1= 0 answer: x= -2 and x= 1.67

asked by xo on May 28, 2019
75. ## Algebra 2

Did I solve these problems correctly? 1. f(x)=-3x + 2 g(x)=3x^2 -x + 2 Find (f + g)(x) -3x+2+(3x^2-x+2) =3x^2-3x-x+4 =3x^2-4x-4 2. f(x)=x -1 g(x)=2x^2 -2x -5 Find g(f(x) ) 2x^2 -2x -5(x-1) =2x^2 -2x -5x+5 =2x^2 -7x+5 3. f(x)=3x + 2 g(x)= -2x2 -3x + 5 Find

asked by Jamie on November 10, 2015
76. ## math

Solve- 4x^2-9x+3=0 What is the smaller answer? Answer -1000 if there is no real value of x that solves this equation Answer must be +,- 1.0%

asked by Shiv on April 26, 2018
77. ## math

How do I solve a this problem under the given conditions? cos(2[theta]) csc[theta]=-4/3, tan[theta]>0

asked by Alex on November 26, 2009
78. ## trig

how do you solve cot theta divided by csc theta is equal to cos theta?

asked by mak on May 9, 2008
79. ## math ASAP

add. write the doubles fact used to solve each one. 0+1=1 6+7 =13 4+3=7 please explain how to use doubles plus 1 and doubles minus 1

asked by EDUARDO on October 4, 2011
80. ## Math

Ed is thinking of. number. If he adds four to his number, the result is less than 6. Write and solve an inequality about Ed's number

asked by Sandy on May 10, 2016
81. ## trigonometry

Use the given information to solve the triangle. 1) C = 145 degrees, b = 4, c = 14. 2) A = 150 degrees, C = 20 degrees, a = 200.

asked by Britt on December 15, 2011
82. ## Fractions and Integers

If x/4+y/5=19/20 where x and y are positive integers then x+y is? If you multiply through by 20 then you'll have 5x+4y=19 where x and y are positivie integers. Can you solve that? Hint: you only need to look at the integers less than 4. Thanx a lot.

asked by Gina on October 7, 2006
83. ## math elementary

add. write the doubles fact used to solve each one. 0+1=1 6+7 =13 4+3=7 please explain how to use doubles plus 1 and doubles minus 1

asked by eduardo on October 4, 2011
84. ## Algebra 2

What's the easiest way to solve this problem -1.28 = Sigma^-1 (25 - Mu) 1.28 = Sigma^-1 (475 - Mu) were Sigma and Mu are each different varialbes that are constant...

asked by Algebra 2 on September 23, 2009
85. ## math

help me solve these problems please 1 1/2 - 3 2/5 + 8/15 - 2 2/3 (-4 7/12) - (-3 2/3)- 1 /24 + 2 5/8 -3 1/2 - (- 1 5/6) + (-1 1/12)+ 2 3/4 8-5*2+6/(-2) this i think i can get the right answer 8-10+(-3) -2+(-3)=-5 is that the rite answer 2 7/9/ (-1 4/81)-

asked by math on August 3, 2008
86. ## math for 6 grade

write and solve an eqution for the following: there are 17 children in the class. 5 more join the class. how many students are in the class.

87. ## Math

The sum of four consecutive even integers is the same as the least of the integers. Find the integers. I'm not sure how to solve it and put it in an equation!

asked by Ally on October 8, 2015
88. ## Economics

Suppose; C = 500 + 0.80(Y – 400) I = 400 G = 400 (X – M) = -100 Solve for income or GDP

asked by Nicole on August 17, 2012
89. ## Algebra 2

What's the easiest way to solve this problem -1.28 = Sigma^-1 (25 - Mu) 1.28 = Sigma^-1 (475 - Mu) were Sigma and Mu are each different varialbes that are constant... Thanks

asked by Algebra 2 on September 23, 2009
90. ## Algebra

If 4.7 plus 3.2 times a number equals the sum of the number and 52.7 what is the number write out the equation and solve.

asked by Amber on February 4, 2017
91. ## Chem

Tt is found that an average volume of 24.25 ml of approximately 0.1 M NaOH is required to reach an endpoint in a titration with 25.00ml of 0.09917 M HCl solution. What is the NaOH concentration? Make sure to give answer to four significant figures.

asked by Abenaa on May 3, 2013
92. ## chemistry

It is found that an average volume of 24.25 ml of approximately 0.1 M NaOH is required to reach an endpoint in a titration with 25.00ml of 0.09917 M HCl solution. What is the NaOH concentration? Make sure to give answer to four significant figures.

asked by mel on March 27, 2015
93. ## human services

In a essay i did on homeless i stated i feel police should be bring homeless to sfae sheltrers instead of writing them tickets for sleeping in a park. how can this solution be affected by social policies or government regulations? any one have any ideas

asked by jean on September 23, 2007
94. ## trig HELP

A barn is 30ft. wide by 60ft long; the rafters make an angle of 40degrees with the horizontal. Find the area of each of the two gable ends and the area of the roof. Please Include Solution And If Possible An Illustration. Thank You In Advance :)

asked by Amber on July 5, 2012
95. ## Chemistry

Suppose a student started with 133 mg of trans-cinnamic acid and 0.50 mL of a 10% (v/v) bromime solution, and after the reaction and workup, ended up with 0.236 g of brominated product. Calculate the student's theoretical and percent yields.

asked by Anonymous on January 23, 2013
96. ## Chemistry

Using the balanced reaction, enter the formula, charge(if any), and state of the species (exclude H2O) in solution if Ba(NO3)2(aq) reactant is present in stoichiometric excess. Separate your answers by comma. NaCl(aq) + Ba(NO3)2(aq) → NR

asked by Kevin on January 29, 2010
97. ## Chem 2

So i need to calculate the pH of 50ml water (de-ionized) with 1 ml of 1M HCl. So the moles of HCl i think is .001 divided by the total amount of solution (.051). I get 0.0196, then i take the negative log of this number and it comes out to 1.71 roughly.

asked by Kyle on October 14, 2013
98. ## Organic Chemistry

Suppose a student started with 129 mg of trans-cinnamic acid and 0.50 mL of a 10% (v/v) bromime solution, and after the reaction and workup, ended up with 0.216 g of brominated product. Calculate the student\'s theoretical and percent yields.

asked by Need Help on August 10, 2012
99. ## chemistry

Suppose a student started with 135 mg of trans-cinnamic acid and 0.52 mL of a 10% (v/v) bromime solution, and after the reaction and workup, ended up with 0.202 g of brominated product. Calculate the student's theoretical and percent yields.

asked by Anna on August 12, 2012
100. ## chemistry

If the unknown tri protic acid has an equivalent weight of 139.42 g/equiv, its average molecular weight is _________g/mol and __________g would be required to make 100.00 mL of a 1.50 N solution. See my response to your first question.

asked by jared on May 16, 2007