# 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 558
1. ## maths

I'm reviewing for my exams, and I was sure that I was comfortable with solving trigonometric identities, but now that I'm looking at ones on my review, I'm not so sure. Could someone please show me, step by step, how to answer one? [cos^2theta] / [1

asked by anonymous on June 18, 2010
2. ## vocab

When he had travelled a few yards further he glanced at the card "indifferently". Surprised, he turned it over and looked again with interets. ("The Green Door") Whenever you glance "indifferently" you show that you are not .. a. clumsy b. cautious c.

asked by cici on October 14, 2013
3. ## Maths and Physics

A particle P of mass m=1 moves on the x-axis under the force field F=36/(x^3) - 9/(x^2) (x>0). Show that each motion of P consists of either (i) a periodic oscillation between two extreme points, or (ii) an unbounded motion with one extreme point,

asked by AKUMA on April 25, 2011
4. ## chemistry

For the reaction A to products}, the following data were obtained: t=0 s, A}]=0.715 M; 22 s, 0.605 M; 74 s, 0.345 M; 132 s, 0.055 M. What is the half-life of the reaction? ive been posting this for awhile now...can someone just show me how to go about

asked by joe on February 28, 2010
5. ## calculus

In the following problem, suppose f(x) is continuous (and differentiable) function on the interval (0,1). Suppose also that for 0 < x>please show steps

asked by james on July 3, 2009
6. ## Physics

Can someone show me and explain a step by step process how to do this problem? Thanks 1) Two equal but opposite charges re separated by a distance d. Determine a formula for VBA = VB – VA for points B and A on the line between the charges situated as

asked by Lyn on February 8, 2015
7. ## math

i am having difficulties figuring this out.... a ball has dropped from a height of 15m and bounces 60% of the previous height. the total distance ball travels after the 9th bounce is... i got this equation done but i do not know how to calculate this to

asked by jackie on January 24, 2011
8. ## Math

A particle P of mass m=1 moves on the x-axis under the force field F=36/(x^3) - 9/(x^2) (x>0). Show that each motion of P consists of either (i) a periodic oscillation between two extreme points, or (ii) an unbounded motion with one extreme point,

asked by Daphine on April 26, 2011
9. ## Math

I am to find all possible values of a and b where a, b are positive integers and to show that I have found all of them.For example: "2^3 = 3^1 + 5" is a satisfied equation where(a, b) are (3,1). I know that it can be solved using modular arithmetic but I

asked by Riddhi on October 26, 2006
10. ## Life orientation

Identify and describe three environmental health hazards that cause ill health ,crises ,and globally .include evidence that is current of the identified issues .use graph s,statistics,pictures etc to show evidence of your information.

asked by Selina on April 27, 2013
11. ## Life orientation

Identify and describe three environmental health hazards that cause ill health ,crises ,and globally .include evidence that is current of the identified issues .use graph s,statistics,pictures etc to show evidence of your information.

asked by Selina on April 27, 2013
12. ## Maths

the diagram show a cylinder of mass 8kg lying at rest on two smooth planes inclined at angles 40 degrees and 50 degrees to the horizontal. Calculate the reaction exerted by each plane on the cylinder Thanks in advance

asked by John B on December 2, 2016
13. ## Maths

You have 400 meters of fencing to use to make a rectangular enclosure. Give a detailed explanation of the different dimensions and areas that you are able to create using the set amount of fencing that you have. You may also show the dimensions of the

asked by SPHA on September 13, 2015
14. ## Pre-Calculus

Find the slope of the tangent line to the curve √(1x+2y) + √(1xy) = 8.24 at the point (2,8)? I know you have to use implicit differentiation, but the radicals keep making me mess up algebraically. Is the changing the radicals to exponents the fastest

asked by Ann on November 14, 2013
15. ## mechanics_ physics

1.20kg mass is dropped from a height of 0.9M unto a spring with force constant K= 120N/m and negligible mass. Find the maximum distance the spring will compressed pls show full working and indicate formular.

asked by precious on January 6, 2013
16. ## math

The Pythagorean Theorem gives the relationship between the sides of a right triangle. The following identities show the relationships between the trigonometric functions of a particular angle. sin2 θ + cos2 θ = 1 tan2 θ + 1 = sec2 θ 1 + cot2 θ = csc2

asked by rick on May 12, 2012
17. ## English

What is the independent clause and dependent clause of the following : "However, Chuck Tompkins, head of animal training at all SeaWorld parks, said Brancheau was rubbing the whale after a show when the whale grabbed her and pulled her in, the Associated

asked by TC on February 27, 2010
18. ## College Chemistry

Calculate the volume of carbon dioxide produced from .025 g of aluminum carbonate and excess HCl at 25 degrees c and 745 toor according to the following reaction: Al(2)(CO(3)(3)) (aq) + HCl (aq) ----- AlCl(3) (aq) + H(2)O + CO(2) (g) im using the numbers

asked by Heather on January 31, 2011

A coffee cup calorimeter contains 100ml of .200M H2SO4 at 22.3 degrees Celsius. When 2.16g Mg is added, the temperature rises to 36.3 degrees Celsius. What is the heat of the reaction per mole Mg? Please help and show steps. Much appreciated :)

asked by samantha on February 27, 2013
20. ## math

How long to the nearest year, will it take an investment at a rate of 12.7% to double its value if the interest is compounded every 6 months? I keep getting 568 years, I know this is not right. Could you please show me how to do this, do I take the log of

asked by Student on September 11, 2014
21. ## Math

if you were to sketch a cirlce graph for the data shown in the table below, what fraction of the circle would represent food? Expense Activities= $600 Food=$450 Souvenirs= %270 Show answer in fraction please!

asked by Naomi on January 26, 2017
22. ## Maths/physics

A particle P of mass m=1 moves on the x-axis under the force field F=36/(x^3) - 9/(x^2) (x>0). Show that each motion of P consists of either (i) a periodic oscillation between two extreme points, or (ii) an unbounded motion with one extreme point,

asked by Hugo on April 25, 2011
23. ## Chem

Interpretation of the data plots consistently show that the freezing points of three solutions are too high. As a result of this "misreading of the data," will the reported molar mass of the solute be too high, too low, or unaffected? Explain please.

asked by Diana on February 22, 2016
24. ## calculus

3. Let f be the function defined by f(x)=ln(2+sinx) for pi

asked by Yoona on February 13, 2012
25. ## physics

Consider the system shown in the diagram. The pulley is a uniform cylinder with mass m3 = 0.60 kg and radius R = 4.0 cm, the other two masses are m1 = 2.5 kg and m2 = 1.0 kg, and á = 30o. Assume the rope is massless, there is no slipping of the rope on

asked by sam on March 8, 2016
26. ## physics

A 13.1-g bullet is fired into a block of wood at 261 m/s. The block is attached to a spring that has a spring constant of 205 N/m. The block and bullet continue to move, compressing the spring by 35.0 cm before the whole system momentarily comes to a stop.

asked by heltor on April 7, 2015
27. ## ALG 2 PLZ PLZ HELP

1.)The product of 14 and n is -28. Write the algebraic equation. 2.)Four times a certain number is the same as the number increased by 78 3.)A blue bike is $14 less than a red bike. The sum of their prices is$300. How much is the red bike 4.)Alex is six

asked by tyneisha on February 14, 2013

On January 1, 2004, Carnival Shipping bought a machine for $1,500,000. At that time, this machine had an estimated useful life of six years, with no salvage value. As a result of additional information, Carnival determined on January 1, 2007, that the asked by sasha on April 28, 2009 29. ## trig/cal how does pih^3/12 simplify to pih^2/4? If you divide denominator by 3 you get 4 and then I guess the 3 goes away leaving a 2? But if this is correct why does this work? asked by Anonymous on March 31, 2009 30. ## Physics How high would you have to lift a 0.294N mouse to do the same amount of work that you would do if you lift a 6.87 kN elephant 1.00cm? asked by Chad on April 11, 2016 31. ## management 2. Suppose you are a manager forming a team at work, what things will you consider when selecting employees for this team? asked by China on September 22, 2008 32. ## Math If Nell works 3/4 of an hour on Monday and 6/10 of an hour on Tuesday, how much time will she work altogether? asked by Bell on November 8, 2012 33. ## Calculus A tank is full of water. Find the work W required to pump the water out of the spout. r=6 h=3 asked by Courtney on December 5, 2011 34. ## lab science 9th grade what is an easy way to remember the equations used for: kinetic energy, potential energy, work, and power? asked by caylanne on April 22, 2011 35. ## physics How much work must you do to push a 13 kg block of steel across a steel table (\mu_{{\rm k}}=0.6) at a steady speed of 1.3 m/s for 2.6 s? asked by gavin on November 18, 2010 36. ## science grade 10 chemistry do you know any website that helps explain how the naming of ionic compounds and etc work, and like naming acids. please help. asked by shaje on January 3, 2010 37. ## Leadership I'm having trouble with this question: What do you think your strengths are as a leader? How may these strengths support your work in the career field you are considering? asked by Celest on June 24, 2013 38. ## hardware components which type of software coordinates the hardware and software of a computer to work efficiently and productively asked by jamie on February 11, 2019 39. ## English When doing a work cited page do you have to put the pages that you used. I already inserted the pages that I used when I sighted in my paper? asked by Monica on October 9, 2009 40. ## Math 6sin(2x)+3=0 How do you find the smallest value of x in the interval 0≤x≤π for which y=0? My work so far: 6sin(2x)=-3 sin(2x)=-1/2 The answer should be 7π/12, or 1.83 Thanks in advance! asked by Autumn on October 18, 2017 41. ## philosophy I need an explanation for "A moral defect in a work of art is always also an artistic defect" and do you agree with that?IF yes or no,please illustrate why..!! asked by Fayrouz on April 5, 2010 42. ## simple subject what is the simple subject in this sentence Jenna enjoyed working and Patrick enjoyed work. asked by joshua on September 13, 2012 43. ## Social Studies (History) What would be two concerns with women leaving their home to go to work in the late 1900s and early 1900s? asked by Nicole on December 11, 2013 44. ## physics How much work must you do to push a 13 block of steel across a steel table at a steady speed of 1.3 for 3.7 ? what is the Wnet and P? asked by Dan on October 12, 2009 45. ## Calculus A tank is full of water. Find the work W required to pump the water out of the spout. r=6 h=3 asked by Courtney on December 5, 2011 46. ## Fine Art 7 Is there any art websites for middle schoolers to do some cool, creative, and pretty art work. asked by Laruen on December 7, 2011 47. ## Math If a number works in an inequality that uses less than or equal to, will it still work in all cases if you replace the less than or equal to with asked by Anonymous on October 12, 2009 48. ## SCIENCE a. An engine has a reservoir of 8000 J and has a sink of 1000 J.i. Find the work generated by the engine. asked by KAIT on August 18, 2011 49. ## algebra How many cards mush you draw from a deck of 52 playing cards to be sure tat at least two are from the same suit? how would you work this out?? asked by Ronda on January 14, 2009 50. ## MATH! HELP! Sean Thomas makes$15.85 per hour. How much would he earn in a forty-hour work week?

asked by Losa on December 14, 2012
51. ## physics

A 1.26×103 kg car accelerates uniformly from rest to 14.8 m/s in 2.79 s. What is the work done on the car in this time interval?

asked by lovt on December 2, 2016

how to work out the percentage of a triangle that is shaded by a circle?? (circle is at a tangent to all 3 sided if that helps) thanks

asked by daz on September 20, 2010
53. ## science

A 1.92 × 103 kg car accelerates uniformly from rest to 12.4 m/s in 3.77 s. What is the work done on the car in this time interval?

asked by Ti'Anna on January 24, 2014
54. ## math

If Nell works 3/4 of an hour on Monday and 6/10 of an hour on Tuesday, how much time will she work altogether? 1 7/20

asked by Pepsi on December 6, 2017
55. ## Physics- Work related

If 2.0 J of work is done in raising 180 g apple how far is it lifted? I would assume that 2/180 = x but I divided it and it does not sound right.. please someone help.

asked by Pablo on October 27, 2010
56. ## Maths

One lap of a racing circuit is 3 (wholes) and 3/4 km. Work out the total distance for 4 (wholes) and 1/2 laps.

asked by stella xx on December 5, 2017
57. ## Just wondering

Why are we not allowed to post links? Everytime I try it doesn't work, but I always see tutors posting links

asked by Anon on December 2, 2017
58. ## math

I'm trying to work on this practice question But got confuse on this question: find the value of P = Q ( 1 - 1.03^-20 / 0.03) where Q is 1000 to the nearest whole number? Thank you =)

asked by Luc on February 8, 2015
59. ## Applied Math

How would I set this up to work? When a number is divided by 5 and the quotient is increased by 8, the result is 16. Find the number.

asked by Ann on February 2, 2018
60. ## Ap physics

a 64 gram arrow is pulled back 29 cm on a bow, with a maximum force of 54-N. how much work is done on the arrow?

asked by Anonymous on January 29, 2013
61. ## Phisic mechanic

An applied force varies with position according to eq. Fx = 3x3 - 5, where x is in m, and Fx in N. What is the work of this force on a body that moves from x to x = 4 m = 7 m?

asked by cls on October 4, 2010
62. ## Ap physics

a 64 gram arrow is pulled back 29 cm on a bow, with a maximum force of 54-N. how much work is done on the arrow?

asked by Anonymous on January 29, 2013
63. ## Chemistry

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes or no? I think Yes

asked by Squirrelheart on January 28, 2019
64. ## Math

A sector of a circle has a radius 5cm The area of the sector is 5π Work out the arc length

asked by Avza on December 7, 2017
65. ## science

A 1.92 × 103 kg car accelerates uniformly from rest to 12.4 m/s in 3.77 s. What is the work done on the car in this time interval?

asked by Ti'Anna on January 24, 2014
66. ## Physical Science

A force of 400.0 N is exerted on a 1,250 N car while moving it a distance of 3.0m. How much work was done on the car?

asked by Casey on September 30, 2010
67. ## Physics

If the speed of a car is doubled, the work to stop the car changes by a factor of so it's 4....but I cannot think of how I know it is double. Any explaination?

asked by mssailormouth on June 20, 2019
68. ## math

sue spends 2 1/4 hours taking inventory and 1 1/2 hour restocking. how many hours did she work

asked by Anonymous on April 3, 2014
69. ## physics

Carlos does a chin-up in gym class and raises himself 0.8 m. If Carlos has a mass of 62 kg, how much work does he accomplish?

asked by Carlos on June 29, 2011
70. ## Dont need to answer if you dont want to

I was wondering, Since Ms. Sue answers almost every question and comments a lot, is Ms. Sue a teacher? Does she work here?

asked by Anonoumous on December 12, 2017
71. ## Chemistry

What is the volume of 128 g of Oxygen at STP?... here's my work... O=16 128/16= 8 moles 8(22.4) = 179.2 L Where did i go wrong?

asked by Jackie on January 16, 2012
72. ## physics

a 40 kilogram barrel is rolled up a ramp 10 meters long to a height of 5 meters how much work was done?

asked by Anonymous on December 5, 2010
73. ## health

Describe how you could use ethical problem solving to work through a health care ethical dilemma

asked by sephanie on June 10, 2008
74. ## math

the sum of two numbers is 80.if the larger number exceeds four times the smaller one by 5.the number is work x+y=80, 4x-y=5

asked by tsa on September 6, 2016
75. ## physics

How much work is required to extend an exercise spring 15cm if the spring constant is 800N/m?

asked by Leah on November 30, 2014
76. ## science

An object moving at 32m/s takes 4s to come to a stop. What is the object’s acceleration? m/s2 Need help please, have work on this and still cant figure out.

asked by heather on November 3, 2017
77. ## Science

The efficiency of a machine is 80%.calculate,the amount of energy needed by the machine to do work of 150joules.

asked by Emmanuel on August 25, 2016
78. ## Maths

Six whole numbers a median of 10 a node of 11 and a range of 4 work out a possible set of six numbers write them in order

79. ## ART 101

There are several, but does any one know at least the top 5 vocabulary words art historians use to describe the work of art? I have three but I would like at least 2 more. I would greatly appreciate it. Thanks

asked by Jan on April 29, 2015
80. ## science

A point charge of 0.5C is brought from infinity to a point A in free space.how much work is required to this?

asked by benjamin on October 10, 2014
81. ## ICP

What is the value of work done on an object when a 10-newton force moves it 30 meters and the angle between the force and the displacement is 25°?

asked by Cheri on June 22, 2015

Need help starting my essay---have done all the background work/analysis, but feel blocked on how to actually get it formed into an essay...

asked by PJ on July 21, 2017
83. ## precalculus

can you please check my work? 7. Find the equation of the parabola y=ax2+bx+c that passes through the points(0,6),(-2,2), and(3,9/2). y=ax2+bx+c 6=a(0)2+b(0)+c 2=a(-2)2+b(-2)+c 9/2=a(3)2+b(3)+c 6=c 2=4a+(-2b)+6 9/2=9a+3b+6 -4=4a-2b -3/2=9a+3b a=-1/2, b=1

asked by Anonymous on December 3, 2016
84. ## Cowdray park

A donkey pulls a cart with aforce of 1500n for 1km howmuch work does the donkey do

asked by Tinashe on June 25, 2015

What will be the amount of work done in increasing the volume of 10 mols of an ideal gas from one litre to 20 litre at 0C?

asked by Tulika on April 8, 2012
86. ## find the unit rate

1. 7 apples for $1.00 2.$20 per dozen tarts Please answer quickly I work hard and need the answer by tommorow!

asked by seb on April 23, 2008
87. ## algebra 2

If a McBurger employee is expected to work four of the seven days in a week, how many different weekly schedules are possible for the employee?

asked by Thomas on May 21, 2010
88. ## Physical Science

A force of 400.0 N is exerted on a 1,250 N car while moving it a distance of 3.0 m. How much work was done on the car?

asked by Misty T on January 29, 2009
89. ## Physical Science

A force of 400.0N is exerted on a 1,250N car while moving it a distance of 3.0m. How much work is done on the car.

asked by Donna on December 7, 2009
90. ## physics

A particle moving in the xy plane under goes displacement s=(2i+3j)m while the constant force is given by F=(5i+2j)N.calculate the work done by the force F.

asked by minas on April 2, 2012
91. ## math

p and L are related by the equation p=RA/L where all the other quantities in the equation are constant. How do I work out the gradient of a graph in which ñ is plotted against 1/L?

asked by sarah on April 28, 2008
92. ## Math

Use the following clues to find a set of 5 numbers. The mean=8. The median=6. The range=10. What are some of the sets of numbers that would work? Thank you.

asked by Happyface on August 31, 2008
93. ## Physics

A lawnmower engine with an efficiency of 0.29 rejects 5500 J of heat every second. What is the magnitude of the work that the engine does in one second?

asked by Tim on May 5, 2013
94. ## Career guidance

what kind of work can i get when i`m doing maths lit,geography,life sciences,agricultural sciences

asked by nyiko on March 28, 2019
95. ## More MATH 

Here's some other stuff we never learned in class: 7e-2=47 e=_____ 1/3g=8 g=_____ 5b+1=46 b=______ I don't know how to work them! Please explain as well.

asked by Candy Corn  on October 6, 2011
96. ## Math

Is i^2=-1 for how many integers N is (N+i)^4 an integer? so far i have factored out (N+i)^4 to be ... n^4+2n^2+1 i would suggest checking that, but from there i don't know where to go...doesn't it work for every integer?

asked by car on January 18, 2011
97. ## science

A toyota engine has an efficiency of 45% and produces 3010J of work. How much heat does the engine reject?

asked by Davidson on February 22, 2013
98. ## physics

how much work is required to lift a 10 newton weight from 4.0 meters to 40.0 meters above the surface of earth

asked by abu on February 15, 2011
99. ## Physics

If I carry a 27 kg bag horizontally across the floor a distance of 14 m. How much work did the FORCE OF GRAVITY do on the bag?

asked by Jabari on March 3, 2014
100. ## Physical Science

If you roll a 5.0 kg bowling ball down the alley at 10.0 m/s, how much work did you do on the ball? a). 250 J b). 490 J c). 2500 J

asked by Tyra J on October 10, 2007