# 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 652
1. ## Math

How would you solve this equation? log(ab)=log(a)*log(b) a=30, b=60 Does the it appear that this is a true statement? Why?

asked by Angelina on December 9, 2008
2. ## algebra -

#21 -can you help me solve this equation: 3x^2 (2x - 2) i keep getting: 6x ^2 -6 #22 can you check this one: (2x ^2) (6x^2) i got 12x #23 can you check this one: (4m^2 + m -2) + (-m^2 - 3m) i got: -4m ^2 + 4m-2 #25 can you check this one: (3x^2 -x -1) +

asked by marko on May 13, 2013
3. ## Math-Geometry

Angle AOB=x+3, Angle AOC=2x+11, Angle BOC=4x-7. Solve for x.

asked by Christa on September 21, 2013
4. ## math

solve exactly for a in the equation: log a^5 + log a^(3/2) = log 625 4 2 8 the 4,2,8 are the bases

asked by isa on February 18, 2009
5. ## math

Now the largest: Perimerter sum 4s+2w+2l 150>4s+2*3s + 2*(15-5s) solve for s, then w, then l.

asked by Roy on September 14, 2009
6. ## algebra

Not sure where to go next. I need to solve this quadratic equation 7x^2-5=0. This is what I have so far, not sure where/what to do next x=2/7 x=sqrt2/7 or x=-sqrt2/7* =+/-sqrt2/7 +/-sqrt14/7 not even sure if this is right.

asked by dani on May 3, 2010
7. ## math

Solve 2 + cos^2(theta)=3sin^2(theta) for 0=< theta < 360

asked by Seven on August 7, 2010
8. ## algebra

I don;t know how to solve the following equation. 9+6x=-6x+105 I have -6x +6x -105 -105 -96=12x 12 12 x=8

asked by Josh on October 21, 2010
9. ## Trig

How would you show that sin(x+pi)=-sin x? I’m not sure how to start so if someone can tell me how to start it I should be able to do the rest.

asked by Danny on May 28, 2018
10. ## trig2

given real numbers x, a, b with x>= a>= b>= 0, show that sqrt x+b - sqrt x-a >= sqrt x+a - sqrt x-b

asked by aaron on May 1, 2016
11. ## math

Show that any positive integer is of the form 4q, 4q+2, where q is any positive integer.

asked by priya on June 20, 2009
12. ## math

show that any positive integer is of the form 4q, 4q+2, where q is any positive integer.

asked by priya on June 21, 2009
13. ## algebra 2

can you show me the steps how to do this? square root of 3-x + square root of 3+x = x

asked by ashley on March 18, 2008
14. ## math

If 1/cos - cos=a^3 and 1/sin - sin=b^3 Show that tan=a/b

asked by David on May 19, 2013
15. ## Proof! Help!

If k vertices has kC2 edges, show that (k+1) vertices has (k+1) C 2 edges

asked by Samantha on February 23, 2012
16. ## algebra

can someone show line by line step by step factor x^2-15

asked by Steve on April 8, 2014
17. ## algebra

input = x output = x -2 so if i have 4 in the input box what would the output be please show how you got it

asked by Anonymous on May 6, 2010
18. ## math

show that 1-sin x/cosx + cosx/1-sin x = 2 sec x

asked by tanya on May 3, 2013
19. ## maths

if tanX=a/b, then show that asinX-bcosX/asinX+bcosx = a^2-b^2/a^2+b^2

asked by krishan on June 18, 2012
20. ## TRIGONOMETRY

given real numbers x, a, b with x>= a>= b>= 0, show that sqrt x+b - sqrt x-a >= sqrt x+a - sqrt x-b

asked by aaron on May 2, 2016
21. ## math

if sin(x+⁡α)=2cos(x-b) show tan x such that : tan x=(2-tan⁡ α)/(1-2 tan α)

asked by James on December 5, 2012
22. ## math-urgent

show that if A= A inverse, then det(A) = +/- 1 if A(transpose) = A(inverse), what is det(A)?

asked by jessica on February 5, 2015
23. ## Physics

Tom the cat is chasing Jerry the mouse across the surface of a table 1.1 m above the floor. Jerry steps out of the way at the last second, and Tom slides off the edge of the table at a speed of 6.4 m/s. Where will Tom strike the floor? A)3.03m from the

asked by Ana on February 13, 2010
24. ## chemistry

The reaction described by the equation Zn + Hg2Cl2 2Hg +Zn+2 + 2Cl is run on electrochemical cell. The E^0 of the cell at 25 degrees C is 1.03V. In the same cell, [Cl-]=.10 M and [Zn+2] is unknown, and the measured cell voltage is 1.21V. Compute the value

asked by Dylan on April 12, 2012

An astronaut is performing a space walk outside the International Space Station. The total mass of astronaut with her space suit and all lher gear is 127 kg. A small leak develps in her pulsion system and 5.84 g of gas are ejected each second into space

asked by Abigail on March 3, 2011

An astronaut is performing a space walk outside the International Space Station. The total mass of astronaut with her space suit and all lher gear is 127 kg. A small leak develps in her pulsion system and 5.84 g of gas are ejected each second into space

asked by Abigail on March 3, 2011
27. ## English

Thank you very much. Here are some more sentences I'm not sure of. 1) DNA can’t be changed since each (every also possible) person/each of us/ has a different DNA (?). 2) Using (by using) this method forensic artists can convict thousands of criminals

asked by Mike1 on April 16, 2011

The mass m = 14 kg shown in the figure is displaced a distance x to the right from its equilibrium position. (Take k1 = 113 N/m and k2 = 198 N/m.) (a) What is the net force acting on the mass? (Use any variable or symbol stated above along with the

asked by HELP! on April 24, 2011
29. ## History8

Which of the following was NOT a reason the United States needed a stronger national government system? A.States maintained control over their own currency. B.The Articles of Confederation based the number of votes a state had in Congress on the size of

asked by foreveryoung_9914 on May 1, 2014

components of sense and smell Olfactory receptors in the nose travel directly to the olfactory (A)__________ before arriving at the olfactory cortex in the frontal area of the brain. This part of the brain has a direct link with the amygdala, which is

asked by Annmarie on May 18, 2014
31. ## accounting

Exercise 5-3 Analyzing and recording merchandise transactions-both buyer and seller LO P1, P2 Santa Fe Company purchased merchandise for resale from Mesa Company with an invoice price of \$16,000 and credit terms of 3/10, n/60. The merchandise had cost Mesa

asked by sally on November 17, 2013
32. ## physics

Neurons are components of the nervous system of the body that transmit signals as electrical impulses travel along their length. These impulses propagate when charge suddenly rushes into and then out of a part of the neutron called an axon. Measurements

asked by Jen on January 21, 2008

words to use: curtail, devastate, digress,incentive, incorporate, indispensable,intermittent,rigor,squander and succumb.... Linda never had to work hard to make good grades in high school. But in college, where the rigors of course work were greater, she

asked by Anonymous on June 7, 2014
34. ## History

I am convinced that our system of temporary enlistments have prolonged war.we may expect everything from ours that a milita is capable of, but we must not expect... Service for which regulars alone are fit. The late battle of Camden is a sad comment upon

asked by Bella on October 1, 2016
35. ## Chemistry

PRECIPITATION BY NaC2H3O2(aq) (a) Add 2 mL of sodium acetate solution to the test tube. (b) If a white precipitate forms at the bottom of the test tube, decant the remaining liquid into another clean test tube and retain the precipitate. (Decanting is the

asked by stacy on August 12, 2010
36. ## Newspaper Article Review

What generalizations can you make from this article? Can you help me please????????????? 'It's a whole new day for lung transplantation' New nationwide system has saved lives of patients who are in sudden desperate need By DENISE GRADY New York Times A

asked by John on September 24, 2006
37. ## physics

A 2.9-kg cart is rolling along a frictionless, horizontal track towards a 1.5-kg cart that is held initially at rest. The carts are loaded with strong magnets that cause them to attract one another. Thus, the speed of each cart increases. At a certain

asked by Tyler on January 17, 2017
38. ## physics

A 2.4-kg cart is rolling along a frictionless, horizontal track towards a 1.3-kg cart that is held initially at rest. The carts are loaded with strong magnets that cause them to attract one another. Thus, the speed of each cart increases. At a certain

asked by Anonymous on April 15, 2013
39. ## Physics

A 3.0-kg cart is rolling along a frictionless, horizontal track towards a 1.2-kg cart that is held initially at rest. The carts are loaded with strong magnets that cause them to attract one another. Thus, the speed of each cart increases. At a certain

asked by Kristi on August 5, 2011
40. ## Urgent math

i need help with these two homework problems Use the Laws of Logarithms to combine the expression into a single logarithm log2 5 − 5 log2 x + 1/2 log2(x + 1) Solve the logarithmic equation for x log2(x + 2) + log2(x − 1) = 2

asked by Emma on August 3, 2015
41. ## Physics

PHYSICS HELP PLS!!How does the equation of a displacement v. speed graph (cart moving down an incline through a speed gate) relate to the work-energy principle. Pls answer asap! Thanks!

asked by PLS HELP!! on April 16, 2016

Maria is applying for a summer job. Six employees doing the same work earn \$8.00, \$8.50, \$9.00, \$9.50, \$10.00, and \$23.50 per hour. In the interview, the boss tells Maria that the median of the hourly wages is \$9.25. Is the boss’s statement misleading?

asked by Aimee on October 9, 2012
43. ## Calculus

A spring has a natural length of 18 cm. If a 22-N force is required to keep it stretched to a length of 24 cm, how much work W is required to stretch it from 18 cm to 21 cm? (Round your answer to two decimal places.) Arg, another question that has me

asked by Mr. Garvoti on February 20, 2015
44. ## 336

Let x represent the number pfessages posted each month on a social netwroking website. Answer: Continuous Let x represent the length of time it takes to get to work. Answer discrete Am i correct???

asked by Aqueen on May 5, 2015
45. ## Physics

A 3.10 kg block is pushed along a floor by a constant applied force that is horizontal and has a magnitude of 43.5 N. What is the coefficient of kinetic friction between the block and the floor? I tried dividing the N by the KG and vise versa but it didn't

asked by xxxxxxx on April 10, 2016
46. ## english

how do you get a arguementive thesis statement out of this? My mother believed you could be anything you wanted to be in America. You could open a restaurant. You could work for the government and get good retirement. America was where all my mother's

asked by tyrone on June 8, 2008
47. ## physics

A large crate weighing 850 N is slid across the floor of a shop. To move the crate 15 m at a steady spead of 10 cm/s, a constant horizontal force of 80 N is applied to the crate. How much work was done in moving the crate?

48. ## physics

8) A 6.0-kg block initially at rest is pulled to the right along a frictionless, horizontal surface by a constant horizontal force of 12 N. Use the work-kinetic energy theorem to find the block’s speed after it has moved 3.0 m.

asked by papy on September 20, 2014
49. ## genetics (again)

i asked this question...when subcloning a gene and inserting it into a vector you normally would use x-gal to locate transformants if x-gal is not available what are the alternatives...and thankyou for the alternatives but i was wondering if there was any

asked by steph on March 9, 2007
50. ## physics

what is is called (both terms) when somthing makes a sound but no one is aroun to here it? Plz this is 4 my h work It could be many terms. Unobserved Source comes to mind. Surely you are not wasting much class time in physics class on this.

asked by jonathan on September 6, 2006
51. ## Physics

A sample of helium behaves as an ideal gas as it is heated at constant pressure from 273 K to 373 K. If 15.0 J of work is done by the gas during this process, what is the mass of helium present? I am not sure what equations to use for this problem....

asked by Katy on May 4, 2010
52. ## Calculus

A chain 27 feet long whose weight is 74 pounds is hanging over the edge of a tall building and does not touch the ground. How much work is required to lift the entire chain to the top of the building?

asked by Allison on February 11, 2011
53. ## physics

Tom exerts a force of 75N horizontally to a skateboarder, Steven's mass is 65kg, for a distance of 2.0m on a frictionless floor. A)How much work did Tom do on Steve? B) What was Steven's final speed?

asked by Rosi3 on May 4, 2016
54. ## physics

Zak, helping his mother rearrange the furniture in their living room, moves a 49.9 kg sofa 7.1 m with a constant force of 37 N. What is the work done by Zak on the sofa? Neglect friction. Answer in units of J

asked by LYNN on September 27, 2012
55. ## physics

A 22 g bullet is accelerated in a rifle barrel 43.2 cm long to a speed of 907 m/s. Use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated. Answer in units of N

asked by Patrick on December 14, 2012
56. ## dynamics of catering

john is a caterer who encourages his staff to make suggestion on work procedures and frequently incorporates their thoughts into his management program. what kind of management style does john exhibit?

asked by mona on March 13, 2010
57. ## Physics

A 19 g bullet is accelerated in a riﬂe barrel 70.6 cm long to a speed of 506 m/s. Use the work-energy theorem to ﬁnd the average force exerted on the bullet while it is being accelerated. Answer in units of N

asked by Ted on February 5, 2013
58. ## Physics 1

a skier of mass 70.0kg is pulled up a slope by a motor-driven cable. How much work is required to pull the skier 60.0 m up a 35.0 degree slope (assumed to be frictionless) at a constant speed of 2.0m/s? The Value of g is 9.81 m/s^2?

asked by Brisa on January 2, 2017
59. ## Art

Which of the following best explains why a colorful tulip is not typically viewed as a work of art. A. Tulips cant be displayed in a gallery B. Tulips are not lasting objects C. Tulips do not have abstract patterns D. Tulips are not human made

asked by Sydney :) on May 6, 2019
60. ## com22o

I have a question for anybody and no it is not home work. Now that you have finished your reseacher paper,for class com22o what advice would you give to students starting this course? what would you do differently if you were just starting this course?

asked by ano on September 21, 2008
61. ## Economics

Sometimes, a bidder on a work contract may bid lower than what would maximize his/her profit from the contract and the reason for that is to create goodwill (to increase expected future business from the buyer). How would you value the goodwill that is

asked by tAMEIKA on August 6, 2013
62. ## Bus Math

On March 30, Wade accepted a nine-month \$32,250 promissory note at 7% interest from one of his clients for work he completed. On April 27, he sold the note to his local bank at 9.5% interest. What were his proceeds?

asked by demey on August 14, 2016
63. ## Math

Can someone explain this problem to me, I cannot figure out how they came up with the answer. The example in my book does not work with this problem. Find the minor for the element in the 1strow and 2ndcolumn. -3 2 -1 19 13 -18 -19 12 7 correct answer is:

asked by Sara on April 26, 2008
64. ## physics

An 18 g bullet is accelerated in a riﬂe barrel 61.7 cm long to a speed of 362 m/s. Use the work-energy theorem to ﬁnd the average force exerted on the bullet while it is being accelerated. Answer in units of N

asked by Domingo on January 17, 2012
65. ## Physic

A horizontal force F pulls a mass m across the floor at constant speed a distance d. If the coefficient of friction between box and floor is u, the work done by the force F is. I know W= FD and Wf = umgd, but I don't understand what the question asking.

66. ## Chemistry

How do i use energy coupling to work out how many molecules of ATP dG =-55 kJ/mol needed to make a peptide bond dG = +25 kJ/mol i don't really understand how to go about this do i need atp to activate the amino acids how can i calculate this??

asked by Amelia on November 4, 2009
67. ## physics

An archer pulls her bowstring back 0.420 m by exerting a force that increases uniformly from zero to 240 N. (a) What is the equivalent spring constant of the bow? N/m (b) How much work does the archer do in pulling the bow? J

asked by sherry on March 3, 2016
68. ## Physics

A 12 kg wagon is being pulled at an angle of 38degrees above horizontal. What force is applied to the wagon if it accelerates from rest to a speed of 2.2 m/s over a distance of 3.4 m? I not sure how to do this question. Is work involved for this question.

asked by I need Physics help on January 11, 2016
69. ## Literature

PART A: What is Asimov's main idea in this essay? (Science an the sense of wonder) A- space is best appreciated through poetry B- poetry and science can work together****** C- the universe is more than beauty D- scientific knowledge is always advancing

asked by Kendra on October 17, 2016
70. ## Chemistry

If 20dm3 methane was burned in pure oxygen: CH4(g) + 2O2(g) arrow CO2(g) + 2H2O(l) how do I work out the volume of carbon dioxide made? And what volume of oxygen would be required? Thank you.

asked by Maria on March 22, 2015
71. ## Math

I have finished Summer Work all but this one. Denver beat the Giants in a game. The sum of their scores was 44. The difference of their scores was 20. How many points did Denver score? I don't want the answer, I just want to know how to figure it out.

asked by Kyle on August 8, 2015
72. ## Economics

Sometimes, a bidder on a work contract may bid lower than what would maximize his/her profit from the contract and the reason for that is to create goodwill (to increase expected future business from the buyer). How would you value the goodwill that is

asked by Tameika on August 8, 2013
73. ## to KEEGAN

Please use "Post a New Question" and then be sure to ask a question! Please note that we don't do students' homework for them. Our tutors try to give you the information to help you complete your assignment on your own. Then once YOU have come up with a

asked by Writeacher on February 4, 2007
74. ## U.S.History

Many immigrants who came to the United States expected to find streets paved with gold and easy opportunities to make their fortunes. can someone please give me a brief description of what they were more likely to find..and i will work on my essay from

asked by y912f on February 18, 2009
75. ## Math

How do I work this problem? A license plate is to consist of 2 letters followed by 5 digits. Determine the number of different license plates possible if repetition of letters and numbers is not permitted. is this correct 26*26*10*10*10*10*10= 67,600,000

asked by Sabrina on July 9, 2014
76. ## Physics

Pepper pulls a 20.0 kg object along the floor accelerating at 2 m/s/s, and μ = .2. How much work has he done while pulling the string 5.0 m? If it takes her 1.0 seconds, how much power has she used? If 1.0 kcal = 4184 J, and an Oreo has 50 kcal, how many

asked by Sara on February 13, 2012
77. ## math

Jason, Erik, and Jamie are friends in art class. The teacher randomly chooses 2 of the 21 students in the class to work together on a project. What is the probability that two of these three friends will be chosen? A. 1/105 B. 1/70 C. 4/50 D. 34/140

asked by Anonymous on March 22, 2016
78. ## physics

(a) How much heat (J) flows from 1.00 kg of water at 46.0°C when it is placed in contact with 1.00 kg of 18°C water in reaching equilibrium? (b) What is the change(J/K) in entropy due to this heat transfer? (c) How much work (J) is made unavailable,

asked by Justin on July 25, 2013
79. ## Physics

Pepper pulls a 20.0 kg object along the floor accelerating at 2 m/s/s, and μ = .2. How much work has he done while pulling the string 5.0 m? If it takes her 1.0 seconds, how much power has she used? If 1.0 kcal = 4184 J, and an Oreo has 50 kcal, how many

asked by Sara on February 14, 2012
80. ## Lesson 6 Principles of Management

According to the job characteristics model, skill variety, task identity, and task significance combine to affect: knowledge of results, meaningfulness of work, responsibility for results, autonomy

asked by Anonymous on July 25, 2013
81. ## Math

Mrs.Miller travels 60 mi round-trip to work.She workds 5 days a week. Her car gets about 25 mi/gal of gasoline.. About how many gallons of gasoline does MrsMillers car use during her weekly commute?

asked by Taylor on January 23, 2011
82. ## physics

A 12 g bullet is accelerated in a rifle barrel 69.2 cm long to a speed of 864 m/s. Use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated. Answer in units of N.

asked by luma on November 28, 2015
83. ## Math

HallIe reads 6 pages from her book in 8 minutes. If she continues reading at the same rate and the amount of time changes by a factor of 5/2, how many pages wi Hallie answer of 15, can you tell us how to work out this problem. Thanks 480/1 5/2= 2400/2

asked by Norma on October 12, 2016
84. ## physics

A 55-kg packing crate is pulled with constant speed across a rough floor with a rope that is at an angle of 44.7 degrees above the horizontal. If the tension in the rope is 155 N, how much work is done on the crate to move it 9.0 m? *looking for W=__J

asked by Alan on March 15, 2011
85. ## General Physics

A 7453 N piano is to be pushed up a(n) 4.04 m frictionless plank that makes an angle of 25.9 with the horizontal. Calculate the work done in sliding the piano up the plank at a slow constant rate. Answer in units of J

asked by Charles on July 26, 2013
86. ## Algebra2/Trig

Find all the zeros of the function and write the polynomial as a product of linear factors. g(x)=3x^3-4x^2+8x+8 On my graphing calculator it says that it is -2/3. But when I do it by hand using synthetic division, I don't get a zero. I'm going crazy

asked by Vincent on January 6, 2009
87. ## physics

I post this early ; but didn't understand the answer.. a 3-kg object falls from a height of 10m to the ground. The work done by air resistance ia 20 J. What is the kinetic energy of the object as it hits the ground..

asked by monea on April 27, 2013
88. ## Econ check my work

Consider the following data: 23 17 20 29 21 14 19 24 Develop and test a hypothesis to determine if the variance is greater than 4. Use the critical value approach and α = 0.05. So I did my work and the variance I calculated is 18.3593 which is greater

asked by Anonymous on February 7, 2018
89. ## physics

A 20 g bullet is accelerated in a rifle barrel 45 cm long to a speed of 354 m/s. Use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated. Answer in units of N.

90. ## Math

Zeke earns a living selling computers. He is paid 12/h plus a 8% commission on sales. What dollar amount of computer sales must Zeke make to earn \$1000 in a 40-h work week.

asked by Lyra on March 24, 2016
91. ## physics

(a) How much heat (J) flows from 1.00 kg of water at 46.0°C when it is placed in contact with 1.00 kg of 18°C water in reaching equilibrium? (b) What is the change(J/K) in entropy due to this heat transfer? (c) How much work (J) is made unavailable,

asked by Justin on July 28, 2013
92. ## physics

(a) How much heat flows from 1.00 kg of water at 46.0°C when it is placed in contact with 1.00 kg of 18°C water in reaching equilibrium? (b) What is the change in entropy due to this heat transfer? (c) How much work is made unavailable, taking the lowest

asked by Justin on July 28, 2013
93. ## physics

(a) How much heat (J) flows from 1.00 kg of water at 46.0°C when it is placed in contact with 1.00 kg of 18°C water in reaching equilibrium? (b) What is the change(J/K) in entropy due to this heat transfer? (c) How much work (J) is made unavailable,

asked by Justin on July 26, 2013
94. ## physics

(a) How much heat (J) flows from 1.00 kg of water at 46.0°C when it is placed in contact with 1.00 kg of 18°C water in reaching equilibrium? (b) What is the change(J/K) in entropy due to this heat transfer? (c) How much work (J) is made unavailable,

asked by Justin on July 28, 2013
95. ## physics

A 20 g bullet is accelerated in a rifle barrel 95.3 cm long to a speed of 801 m/s. Use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated. Answer in units of N.

asked by go on March 7, 2011
96. ## Maths

I have a summation formula for Fibonacci numbers. n (SUM)F(2i)=F(2n+1)-1 i=0 When the i value is changed from zero, and is then subbed into F(2i)the equation will not work. (RHS wont = LHS) eg: i=2 n=3 3 (SUM)F(4)=F(7)-1 i=2 I understand the summation bit,

asked by Tim on November 4, 2008
97. ## math

as a fundraiser students had to raise \$1200. They will sell popcorn,at the games history shows that there are usually 120 bags of popcorn sold each game. How much money should they charge if they work 6 games.

asked by janice on April 21, 2009
98. ## physics

A 2 kg metal plate slides down a 11-meter high slope. At the bottom its speed is 7.5 m/s. To the nearest Joule, what was the magnitude of the work done by friction?If the slope in the above problem is 22 degrees, what is the coefficient of friction?

asked by Anonymous on April 21, 2012
99. ## Physics

A 7159 N piano is to be pushed up a(n) 2.26 m frictionless plank that makes an angle of 25.6 ◦ with the horizontal. Calculate the work done in sliding the piano up the plank at a slow constant rate. Answer in units of J.