# 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

91,330 questions, page 568
1. ## spanish Sra JMcGuin

Hi I have 4 work sheets to do tonight I do not get home home until about 6pm what time are you on.

asked by sam on November 7, 2007
2. ## physics

It takes 214 kJ of work to accelerate a car from 23.1 m/s to 29.3 m/s. What is the car's mass?

asked by shaknocka on February 28, 2011
3. ## physics

If an 8N force is applied to a wall for 2 minutes and the wall does not move, how much work is done?

asked by anthony on September 19, 2012
4. ## physics

a 0.180 kg ball falls 2.5m. How much work does the force of gravity do on the ball?

asked by pete on November 16, 2010
5. ## nothing

just wanted to say good luck with the school week and work week everybody.

asked by TayB on November 16, 2015
6. ## Math

If you make \$18 a hour and only work 15 hours a week, how much do you make a month?

asked by Amy on May 16, 2016
7. ## physics

It takes 175 kJ of work to accelerate a car from 23.9 m/s to 27.7 m/s. What is the car's mass?

asked by Al on November 30, 2011
8. ## physics

It takes 214 kJ of work to accelerate a car from 23.1 m/s to 29.3 m/s. What is the car's mass?

asked by heather on February 27, 2011
9. ## Algebra 1

what is the answer to this, please work it out. this is a fraction but i could not format it as such. Thanks! 5x(2)(squared) - 10x 7x-8 - 10x

asked by Al on October 23, 2008
10. ## algebra help

(t^3-3t^2+5t-6)divided by (t-2) t^2 t-2! t^3-3t^2+5t-6 t^3-2t^2 then t t-2 t^2 +5t -6 t^2 -10t then 15 t-2 15t -6 15t -30 then remainder 24 check my work

asked by doc.mims on August 20, 2005
11. ## math

Ok i may be dense but i don't ge tthe formula cause when i work out 3 } ã(9-4(1)(-12))/2 I get 60 not 57, and i don't understand how you got 9 or 4 either

asked by Mary on June 27, 2009
12. ## physics

How much work can a 22 kW car engine do in 60 seconds if It is 30% efficient It is 100% efficient

asked by Melissa on May 8, 2012
13. ## weather

what are two examples of how we predict weather and how do they work? also why is understanding weather important?

asked by Anonymous on May 29, 2008
14. ## mathematics

can anybody tell me how the Leibniz's rule for the differentiation work? I have not studied partial differentiation yet...

asked by masaya on November 10, 2008
15. ## physics

A spring is stretched 40mm by force 15N, what is the work done by the force

asked by Issa on June 27, 2018
16. ## physics

A mass of 2000g is drop from a height of 10m.what is the work done by the mass

asked by aiman on April 12, 2012
17. ## Physics

If a person lifts a 21.9 kg bucket very slowly from a well and does 8.3 kJ of work on the bucket, how deep is the well?

asked by Nicole on December 7, 2013
18. ## science

When you do work to lift an object, what form of energy does the object gain

asked by Annie on June 5, 2014
19. ## Mathmatics

The points A (3,5) and C (12,2) are points on the straight line ABC. AB:BC = 2:1. Work out the coordinates of B. Thanks

asked by Jessica on April 19, 2017
20. ## Physics

If you try to lift a 2 x 10 plank by applying 25 N force but plank does not move did you do any work?

asked by Anthony on March 18, 2014
21. ## physics

A spring is stretched 40mm by force 15N, what is the work done by the force??

asked by Issa on June 27, 2018
22. ## Algebra II

The graph of a line through (2,3) that is perpendicular to the line with equation x = -1 also goes through which point? How to work this???? Thanks.

asked by Lucy on November 11, 2007
23. ## Nursing QUESTION HELP

Does LPN work with kids? I asked my mom and she said no (she an LPN herself) but online it says yes.

asked by ANITA on August 9, 2015
24. ## Algebra

I just need some help finding the equations to this problem and i will know how to do the rest. Kenisha sells athletic shoes part-time at a department store. She can earn either \$500 per month plus a 4% commission on her total sales, or \$400 per month plus

asked by Brielle on November 6, 2012
25. ## Physics

Two blocks are positioned as shown below. block A has a mass of 15 kg and hangs on one end of a cable that passes over a frictionless and massless pulley. The other end of the pulley is attatched to block B which has a mass of 10 kg. Block B rests on an

asked by Eastern Illinois University on February 20, 2012
26. ## Physics

A 150 gram mass is attached to a horizontally aligned spring on a frictionless surface. A force of 10 Newtons will stretch the spring 25 centimeters. If the spring is compressed to 15 centimeters and then released, calculate: the spring constant; the

asked by Bobby on May 1, 2019
27. ## Chemistry

Bomb calorimetry is best for determining heat values. Because we cannot have a bomb calorimeter for every pair of students, we use what is readily avaliable. Why would two styrofoam cups be an economical way of determining these heat values and what is the

asked by just need help on April 16, 2019
28. ## Physics

Two blocks are positioned as shown below. block A has a mass of 15 kg and hangs on one end of a cable that passes over a frictionless and massless pulley. The other end of the pulley is attatched to block B which has a mass of 10 kg. Block B rests on an

asked by Eastern Illinois University on February 20, 2012
29. ## College Science

A chandelier is suspended by two identical, vertical chains side by side. The chandelier's mass is m = 5.3 kg. A. If the tension in one chain is represented by T, write an expression for this tension in terms of m and g, the gravitational acceleration on

asked by Sam on October 9, 2014
30. ## History

Which of the following is an example of the president's power of recognition? A:The president recognizes the Senate's approval of a treaty B:The president receives foreign diplomats*** C:The president approves another country's political system D:The

asked by marylyn on November 7, 2017
31. ## Math :)

1.Try to solve this problem without using a formula. Suppose a disease is transmitted from an individual to one other during the period of a week. Each of those two gives the disease to two more people in the second week, so that the total of newly

asked by Kim on December 2, 2013
32. ## organic chemistry

Instead of using 1-propanol or 2-pentanol, a student decided to conduct the same reaction (using Sodium Bromide and Sulfuric Acid) you did starting with 2,4-dimethyl-3-pentanol instead. What product(s) would you predict for this reaction? Show a mechanism

asked by spirit on April 21, 2009
33. ## biomecular sciences

I need to calculate beta-galactosidase units for a lab and i am really having a hard time. please show me how to calculate. A B C OD 600 .166 .109 .105 0d420 A1 .74 A2 1.40 B1 .16 B2 .33 C1 .10 C2 .11 average of 420 = 1.07-A, .25 = B, .15 = C, and .18 for

asked by jennfer on March 7, 2012
34. ## lac 2

4. Critics often say that Chekhov’s short stories show “slices of life” rather than complete story arcs. How do the endings of "Star Food," "Everything That Rises Must Converge," and "The Bet" reflect what might be considered incomplete story arcs?

asked by Anonymous on September 23, 2014
35. ## Physics

. A package sitting on a shelf is knocked off. The velocity of the box just before it hits the floor is 8.5 m/s. Calculate the height of the shelf using; A displacement/velocity/acceleration equation Conservation of energy and hence show that these two

asked by Sarah on October 2, 2013
36. ## History-Civil War

To:Damon..His little bit of written info really helps me to complete my essays....New question...Was there an opportunity for the confederates to win during any day of Gettysburg? Identify & analyze the opportunity, and show how the South could have

asked by Joanne on June 18, 2011
37. ## Maths

Janet is twice as old as Doug, while Peter is 5 years older than Doug. If their ages are added the answer is 95 years. Use algebra to calculate the age of each of them. explain any assumptions made, demonstrate all reasoning and show full working out

asked by Claud on April 21, 2017
38. ## Chemistry

I'm using the equation c3H8 + 5O2 yields 3 CO2 + 4H2O + 2220 kJ to figure out how many moles of O2 will be needed to produce 3450 kJ of the above reaction. I know this involves a proportion, but I have no idea what to write. Can you show me this proportion

asked by Tabetha on May 19, 2009
39. ## algebra 2

A. I need to write an equation to the linear equation..(-2,-2), (3,3). B. I need to graph the function of y=|x| on a coordinate plane. C. I need to give one similarity and one differnce for the equations and graphs in parts A and B. I really need your help

asked by logan on January 17, 2008
40. ## fundamentals

A playground has its highest point 2.2m above the lowest point, and the slide is 4.9m long. If the average resistance to motion is one-fifth of the weight of the child(mass 40kg), find the speed at which the child reaches the bottom show working?

asked by David on June 5, 2013
41. ## Maths

In our math class, we didn't really go through alot on The circle so I still have some problem about the question assigned to me : Two circle C1 and C2 have equations x^2 + y^2 +4x - 3 = 0 and 2x^2 + 2y^2 +4x -6y + 3 =0 respectively. Show that, for all

asked by Pat on November 21, 2016
42. ## Science

long wings are dominant to short wings in fruit flies. make a punnett square to show the predicted outcome of a cross between two parents that have both alleles for wing length. what is the ratio of flies produced?

asked by Student on February 3, 2015
43. ## Chemistry

Consider the titration of 50mL of 2.0M HNO3 with 1.0M KOH. At eah step, add the following: 0ml, 25ml, 50ml. a) Write a reaction to show the initial reaction b)ICE table c) determine the spectators present after d)Calculate the pH

asked by Gub on April 6, 2016
44. ## GENETICS

long wings are dominant to short wings in fruit flies. make a punnett square to show the predicted outcome of a cross between two parents that have both alleles for wing length. what is the ratio of flies produced?

45. ## statistics

There is a table of AVERAGE monthly temperatures of two different areas of the same city. A scatterplot of the data is made to show that the relationship is linear between the two. If raw data was used instead of the averages to make the scatterplot, the

asked by Jon on July 3, 2013
46. ## Mathematics

Dear Jiskha, I will appreciate if you can show me step by step how this geometry math question is solved. Using the Pythagorean Theorem,how do i find the length the unknown side 'b'. Side 'a' has a measurement of 1...the hypotenuse: a square root of 2.

asked by Ryan on August 19, 2008

This is what I have to do "Draw a map of mainland U.S.A. and show (draw)how the mississippi river divides the country (part of the labeling) and label both sides correctly." I was wondering if you can find me a map that way I can start it off like how

asked by Anon on April 8, 2013
48. ## math

Dion's grandmother is making a quilt using four small squares put together to form one large large square block. how many different can she make using one each of red, green, blue, and yellow smalle squares? show the possible arrangements

asked by Angelina on April 20, 2015
49. ## Math

Can someone please help me with this. I'm not getting the right answer. Jill traveled to canada and bought a lamp for 460 canadian dollars. In US dollars (to the nearest cent)this is equivalent to 577.25 517.77 450.52 480.66 Can you please show me how you

asked by Jackie on January 26, 2017
50. ## Math

A circular piece of wire has a radius of 12 cm. This is cut then bent to form an arc of a circle whose radius is 60 cm. Find the angle subtended at the centre by this arc. Give your answer to the nearest degree. Please show working out Thank you so much!

asked by Candice on December 9, 2011

dion's grandmother is making a quilt using four small squares put together to form one large large square block. how many different can she make using one each of red, green, blue, and yellow smalle squares? show the possible arrangements

asked by Spartans on April 20, 2015
52. ## Physics

In an ice show a 40.0 kg skater leaps into the air and is caught by an initially stationary 65.0 kg skater. (a) What is their final velocity assuming negligible friction and that the leaper's original horizontal velocity was 4.00 m/s? (b) How much kinetic

asked by Amy on July 14, 2013
53. ## Geometry

Make a conjecture for each scenario The square root of an even number The product of two odd numbers and a multiple of 2 Find one counterexample to show that each conjecture is false. For two real numbers a and b, a is either equal to b or greater than b.

asked by Nautica on October 18, 2018
54. ## Physics

A youngster shoots a bottle cap up a 15.0° inclined board at 1.92 m/s. The cap slides in a straight line, slowing to 0.95 m/s after traveling some distance. If the coefficient of kinetic friction is 0.35, find that distance. Can someone please show me the

asked by Lindsay on December 4, 2007
55. ## Philosophy

a) Using long or short truth tables (symbolize as necessary and show tables) determine and state whether the following arguments are valid, briefly explaining your table; and b) if valid, demonstrate validity by deductions using Group I rules. Arg 1. P-->Q

asked by Anne on December 13, 2006
56. ## Math

The table show the colour preferences of 50 shoppers at the mall. What is the probability that one shopper, selected at random from the 50 surveyed, prefered the color red or blue?? ||7 Red, 3 Yellow, 13 Blue, 15 Green, 12 Orange|| A:2/5** B:7/50 C:1/2

asked by Waffle4536 on May 21, 2018
57. ## chemistry

1. Heat can initiate reaction as well as be a product of chemical reactions. Cite the specific sample from the experiment that show heat acting in the manner. (this is for recycling a copper using a copper nitrate, sodium hydroxide and HCL)

asked by jhong on March 8, 2012
58. ## english

Which sentence is the gerund used as an appositive? A) Catering is a great way to show off your talent as a cook. b) The best part of catering is making a special occasion a tasty event. c) The girl has a new job, catering. d) Mr. Lane gives all of his

asked by Anonymous on December 7, 2012
59. ## Multiplying and Dividing Decimals

Sam and 3 friends ate lunch at Red Lobster. They decided to split the bill evenly. The total bill was \$71.80. How much was each person's share? *Note: Please do not just give me the answer, but also show me how said answer was achieved and the steps to

asked by Terra on November 7, 2012
60. ## spanish

There would be true country music playing like station Kat Country 100.7 radio station in the background and in adds, also there would the main game show. With a few side guesses that sound and funny videos. how is this said in Spanish?

asked by anonymous question on July 31, 2017
61. ## English

Critics often say that Chekhov’s short stories show “slices of life” rather than complete story arcs. How do the endings of "Star Food," "Everything That Rises Must Converge," and "The Bet" reflect what might be considered incomplete story arcs?

asked by mary ann on December 24, 2013
62. ## geography year 8

Please could someone help me. In Geography I am learning about the River Tees. I have found most of the information i need but i am struggling to find good diagrams and pictures that show the processes of the River Tees , how the land changes on it`s

asked by its my birthday today! on February 21, 2009
63. ## math

dion's grandmother is making a quilt using four small squares put together to form one large large square block. how many different can she make using one each of red, green, blue, and yellow smalle squares? show the possible arrangements

asked by Spartans on April 20, 2015
64. ## science

Ok listed below is the question. I have chosen to use incarcerated women with a mental illness: nature vs. nurture. Population will be women who have been incarcerated and diagnosed with a mental illness between the ages of 18 and 50. I am having trouble

asked by Jennifer on January 18, 2012
65. ## Geography

Please help me on these: 12. The natural factor limiting development of the West is the availability of a. water b. land c. mineral deposits d. natural vegetation I'm sure it's not B. I'm stuck between water and mineral deposits. here's what i read in my

asked by y912f on January 19, 2010

Consider an ideal spring that has an unstretched length l_0 = 3.5 m. Assume the spring has a constant k = 36 N/m. Suppose the spring is attached to a mass m = 8 kg that lies on a horizontal frictionless surface. The spring-mass system is compressed a

asked by akha on October 12, 2013
67. ## Measurements

What is the measure of the point angle for a star-shaped polygon with 8 points and a dent angle of 130 degrees? How do you solve this?

asked by rmz on February 7, 2010
68. ## Math

Lea drove 420 miles and used 20 gallons of gas. How many miles per gallon did her car get? *my question is what would be the equation so I can solve it?

asked by Shohanur on January 12, 2014
69. ## Calculus

The function f(x)=(6x+1) e^4x has one critical number. Find it I know how to solve this kind of equation; however, I never solved one with a binomial. How will can I factor this when working out the equation?

asked by lex on March 27, 2019
70. ## algebra 2

The annual expenses of a manufacturing company must satisfy the inequality that follows, where x is in millions of dollars. 2(x-5)>6(x-3) A. Solve the inequality for x. Interpret the result.

71. ## Math

Two factors that make a product are sometimes called a factor pair . Describe how using factors pairs helped you solve the problems.

asked by Santa on January 23, 2014
72. ## Geometry

asked by Jim on June 17, 2016
73. ## Math

Which set of output values correctly competes the function table. (y=2x-4) Input (x) 6 ? 2 ? -4 ? 1. 8,2,12. 2.8,0,12. 3.8,0,-12. 4.-8,0 12. Please give me step by step of how to solve this.

asked by LOVE on February 19, 2016
74. ## precalc

Solve the logarithmic equation for x. (Enter your answers as a comma-separated list.) log2(x + 17) − log2(x − 2) = 1 2 is the base for the log.

asked by JB on March 7, 2016
75. ## Math

Two factors that make a product are sometimes called a factor pair . Describe how using factors pairs helped you solve the problems.

asked by Grand on January 23, 2014
76. ## Math 2 questions :/

Which of the following equations has an infinite number of solutions? 3x ¨C 3 = ¨C4x 2y + 4 ¨C y = 16 7x + 5 = 4x + 5 + 3x 6y ¨C 2 = 2(y ¨C 1) Write the inequality and solve for the following problem: The result of 6 subtracted from a number n is at

asked by Princess Anna on January 8, 2014
77. ## Differential equation (urgent pls!!!)

Reduce the differential equation below to an exact equation (X - 2siny + 3)dx -(4siny - 2x + 3)dy=0. The problem here is how to solve for the integrating factor...any help pls?

asked by BEN on March 4, 2016
78. ## Math

Use the given information to solve the triangle. If two solutions exists, find both. A=110 degrees a=125 b=100 a is greater than b so I think that there is only one triangle. I am not sure where to go from here.

asked by Abbey on April 6, 2010
79. ## Chemistry

I am having a really hard time setting this problem up to solve can anyone help? Hexane has a density of 0.659 g/mL. How many (mL) would a student need to pour in order to get 49.5g of hexane?

asked by Lynn on September 11, 2013
80. ## Math

Use the given information to solve the triangle. If two solutions exists, find both. A=110 degrees a=125 b=100 a is greater than b so I think that there is only one triangle. I am not sure where to go from here.

asked by Abbey on April 5, 2010
81. ## math

idk if this is supposed to be common sense but, i need help understanding why when i make this equation solve for (y) that there is a plus/minus answer. (yx)yx = 2x y = .5(sqrt(2x)/2) y = .5(-sqrt(2x)/2)

asked by eric on January 17, 2014
82. ## Math

A theater shows 8 movies at 3 prices five times each day. How many types of tickets does the theater sell? How do I solve this problem???

asked by sara on April 7, 2010
83. ## Math

How do I solve lim((3x^3 - 5x +2)/(4x^2 + 3)) as x approaches infinity? I divided everything by the largest power of x, but I ended up getting a denominator of 0. Do I have to factor this? (answer is infinity)

asked by Stuck on February 6, 2010
84. ## Math

Solve a man of mass of 90kg is moving at a constant velocity. He has kinetic energy of 2205J. Calculate his velocity.

asked by Favour on February 25, 2019
85. ## math

By what percent will a fraction decrease if its numerator is decreased by 50% and its denominator is decreased by 25%? plz solve fast! needed by 6:30pm

asked by Anonymous on May 3, 2016

How many molecules of water and oxygen atoms are present in 0.9g of Water. this numerical is based on Mole Concept. Kindly solve it!!!

asked by Akash on June 28, 2010
87. ## math

Two factors that make a product are sometimes called a factor pair . Describe how using factors pairs helped you solve the problems.

asked by kind on January 23, 2014
88. ## Math

Solve for x: 2sin^2x = 3sinx + 2 on -pi < x < 4pi (the "

asked by Momo on December 5, 2009
89. ## Algebra

Solve the formula for the given variable. Assume all variables represent nonnegative numbers. A=6s^2, for s A. A/6 B. SQRT A/6 C. -SQRT A/6 D. Not given I believe the anser is B, but not 100% sure

asked by Jen on November 22, 2009
90. ## Math

Use the given information to solve the triangle. If two solutions exists, find both. A=110 degrees a=125 b=100 a is greater than b so I think that there is only one triangle. I am not sure where to go from here.

asked by Abbey on April 6, 2010
91. ## Math

Please solve these word problem.Mrs wong bought some flour.she used 3/8 of it to bake some cakes and kept the rest.what percentage of the flour did she keep?

asked by Tabassum sultana on February 15, 2019
92. ## pre cal

Use factoring to solve the polynomial equation: HINT: Try multiplying each side of the equation by a number to eliminate the denominators. x2/162 + X/18 + 1/9 =0

asked by ari on July 6, 2016

A triangle with integral sides has primeter 8. the area of the triangle is? (A)2 root 2 (B) 16/9root3 (c)2root 3 (E)4root 3 Would somebody help me?? I don't know how to solve it!

asked by Nonno on May 26, 2010
94. ## accounting

Write a word problem involving a discounted price. Describe the situation and pose the question, but DO NOT SOLVE the problem.

asked by catrina on January 29, 2011
95. ## math

to solve an equation, it is sometimes helpful to ____________, the original operation. a. redo b. undo c. imitate d. expand I believe the answer is undo B

asked by Jackie on October 7, 2008
96. ## Math

How do you find decreasing intervals of 6x^3-63x^2-144x-2? I found my increasing intervals from placing the derivatives i just can't seem to solve for the decrease

asked by Alessandra on November 4, 2014
97. ## chem

Please help me balance this equation: I just can't get it right. Do you have any strategy you use to solve such equation balancing if so please help me. Ba(ClO3)2(aq)+ Na3PO4(aq)-> Ba3(PO4)2(s)+NaClO3(aq) Thanks alot!!:)

asked by katlyn on March 18, 2013
98. ## Math

Let f(x) = 1/(x+7)+15/(x-8). Find all a for which f(a)=f(a+15). How do I solve this problem? I understand this so far f(a)=f(a+15) 1/(7+a) + 15/(a-8) = 1/(a+22) + 15/(a+7) I am lost after that This is a multiple choice question and I am not getting any of

asked by David on October 12, 2008
99. ## algebra

_2__ = ____2___ x-9 x^2-6x-27 Solve the equations Check solutions to the equations (plug the answer back into the original equation.)

asked by Julie on February 19, 2011
100. ## Linear Programming - The Graphical Method

Solve the linear programming programming by graphing and then determining which vertex minimizes the objective function G=4x+3y . {5x+15y≥15 {5x+5y≥35 {x≥0 {y≥0 x = y = What is the minimum value? G=

asked by siri on November 17, 2016