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 196
1. History of old Europe

The Middle Ages began with the collapse of... A. Renaissance. B. Roman Empire. C. Kingdom of Mali. D. Tang dynasty. My answer- A Why did the system of feudalism arise drink ht eMiddle Ages? A. to develop an economic system b. to determine jobs within city

asked by dddd47906 on September 15, 2014
2. math

On the 1st of January 2014, Carol invested some money in a bank account.  The account pays 2.5% compound interest per year.  On the 1st of January 2015, Carol withdrew £1000 from the account.  On the 1st of January 2016, she had £23 517.60 in the

asked by raza on March 20, 2017
3. Math

Dominic earns $18 an hour plus$25 an hour for every hour of overtime. Overtime hours are any hours more than 35 hours for the week. Part A: Create an equation that shows the amount of money earned, E, for working x hours in a week when there is no

asked by B&PT on May 16, 2017
4. physics

I calculated parts a, b, c, but cannot figure out d. I tried combining all the forces and adding them but I am missing something? There is an 18 kg box on a 32degree incline. a HORIZONTAL force of 150 N is given to the box a) How much work is done by the

asked by Aileen on November 7, 2010
5. English

Can someone read my eight sentence paragraph. A high school diploma is very important to me. With a high school diploma I can show my children that your never to old to go back to school. Which will set a good example for my children to show them they need

asked by Rebecca on February 21, 2015
6. conditional sentence

1. If the sound system hadn't failed, last night's show would have been better. a. this is a correct sentence using the 2nd conditional form b. this is a sentence using the 3rd conditional form Answer a. 3. if the club's manager agrees, they'll play a few

asked by Jim Collum on June 12, 2013
7. Algebra

A line has slope -5/3. Through which two points could this line pass? A: (12,13), (17,10) B: (16,15), (13,10)*** C: (0,7), (3,10) D: (11,13), (8,18)*** My Explanation: I know how to use the formula for slope, which is y2 -y1 over x2 - y2, so I know how to

asked by Lynn on December 8, 2016
8. Chemistry

25.0 cm cubed of Barium hydroxide,Ba(OH)2 solution neautralises 35.0 cm cubed of aqueous hydrochloric acid of concentration 0.09 mol dm-3. what is the concentration of the barium hydroxide? I like the titration equation

asked by Laura on November 5, 2006
9. Physics

A steam-electric power plant delivers 900 MW of electric power. The surplus heat is exhausted into a river with a flow of 2.91×105 kg/s, causing a change in temperature of 1.07 oC. A. What is the efficiency of the power plant? B. What is the rate of the

asked by Abbey on April 6, 2016
10. chemistry

How can I determine the concentration of HCl remaining in the flask after back titration? PLEASE SHOW SOLUTION!!!!!! Con. of HCl: 0.14M Volume added:100mL Con. of NaOH:0.145M Weight of Tablet: 1.0g I have been given weight of antacid, concentration and

asked by Jane Smith on July 11, 2015
11. math stumped...

is the solution of 1/3x=21? greater than or less than 21? the volume F of the cylinder is 65n cubic centimeters. the height of the cylinder is 5 centimeters. use the vomula v=Bh to find the area of the base of the cylinder? the total area of triangle is 44

asked by scooby on September 8, 2013
12. Chemistry

.01 mols of a weak acid is dissolved in .1 L of water. That solution is then reacted with .01 mols of NaOH. Would the resulting solution be acidic, basic, or neutral? Why? What reaction equations support the explanation? I think the answer is that the

asked by Anonymous on February 12, 2014
13. Math

Sophia downloaded 592 vacation pictures. Of the pictures, 63% show the beach. About how many pictures show the beach? Use a rate per 100 to estimate.

asked by Dylasia on October 26, 2015
14. statistics

34. Two students (say A, and B) are challenged to solve a problem in statistics. Suppose that the probability that A will solve the problem is 40%, the probability that B will solve the problem is 55%, and the probability that A or B will solve the problem

asked by meri on June 30, 2015
15. math

2.Define the shape of the rectangular area by establishing a relationship between the length and width of the rectangle. For example, L = 2W + 5, or W = 3L – 4. Be sure to include the appropriate units (inches, feet, yards, miles, or meters). 3.Using the

asked by Anonymous on October 11, 2011
16. Help!

Geothermal power would be classified as a(n) _____________________ resource because its supply will not run out. An example of a renewable and inexhaustible resource that requires the construction of dams is _________________________ energy. To solve the

asked by Anonymous on April 12, 2014
17. intro to paralegal

i have a discussion post that im not quite sure how to answer, since i am unsure how to interpret it. It reads as follows: The American common law system provides the judicial system with two primary duties 1) interpreting the meaning of statutes and

asked by eva on April 20, 2018
18. Math 116

I have a long problem which I need help with..... Q1) there are two plans available with a total of 56 houses available. x represents plan 1 and y represents plan 2. write an equation illustrating the situation: A1) x+y=56 Q2) there are 3 times as many

asked by Carmen on November 1, 2008
19. Grade 11 maths plz help!!!

A software company started with 2 employees. In 6 months, the company had 7 employees. The number of employees increased in a steady rate. Which equation models the relationship between the number of employees n and the number of months m since the company

asked by Anjali on September 23, 2008
20. chemistry

The formate ion, (CHO2-), is related to the acetate ion and forms ionic salts with many metal ions. Assume that 9.7416 g of M(CHO2)2 (where M represents the atomic symbol for a particular metal) are dissolved in water. When a solution of 0.200 M sodium

asked by bill on April 11, 2012
21. ELA

asked by Naegirl on December 8, 2016
22. statistics

One method for estimating the availability of office space in large cities is to conduct a random sample of offices, and calculate the proportion of offices currently being used. Suppose that real estate agents believe that of all offices are currently

asked by tea on March 26, 2012
23. Algebra 1 Word Problem (Reiny)

How am I supposed to solve and construct a graph for this problem? 1. Sandy makes $2 profit on every cup of lemonade that she sells and$1 on every cupcake that she sells. Sandy wants to sell at least 5 cups of lemonade and at least 5 cupcakes per day. She

asked by Anonymous on January 17, 2014
24. Chemistry

The capacity of a large irregularly shaped vessel cannot be computed from geometric data. As a result, it is decided that the volume be established from analytical data. The vessel is filled to its capacity mark with calcium-free water. A known small

asked by Gabby on April 28, 2008
25. chemistry

25.0 cm3 of an acidified solution containing Fe2+ ions was titrated against potassium manganate (VII) solution. 20.0cm3 of 0.050M potassium manganate (VII) was needed. Calculate the concentration of Fe2+ ions in the acidified solution.

asked by tam on March 8, 2011
26. chem

Osmolarity (Osm) is the molar concentration of the particles-molecules and/or ions-in a solution. In physiological solutions, 5 \% ({\rm m/v}) glucose ({\rm C}_{6}{\rm H}_{12}{\rm O}_{6}) and 0.9 \% ({\rm m/v}) {\rm NaCl}, the osmolarity must be the same

asked by Anonymous100 on April 11, 2011
27. chem

Osmolarity (Osm) is the molar concentration of the particles-molecules and/or ions-in a solution. In physiological solutions, 5 \% ({\rm m/v}) glucose ({\rm C}_{6}{\rm H}_{12}{\rm O}_{6}) and 0.9 \% ({\rm m/v}) {\rm NaCl}, the osmolarity must be the same

asked by Anonymous777 on April 11, 2011
28. Anatomy and Physiology

Hello! Thanks for checking my question out! ____ 32. Which of the following statements is not true about the immune system? (1 point) a) In children, lymphatic tissues such as adenoids, tonsils, and lymph nodes enlarge as growth continues and from exposure

asked by Da Fash on November 9, 2017
29. Health insurance

Please check my answer thanks for the help :) If an enrollee uses more services than originally assumed per the PPPM calculation then what would the paln do? A. show a profit for that period B. show a loss for that period C need a contract renegotiation D.

asked by Lucie on March 1, 2008
30. Math/Physics

Please check my work below and comment. A tank initially contains 80 gallons of fresh water. A 10% acid solution flows into the tank at the rate of 3 gallons per minute. The well-stirred mixture flows out of the tank at the rate of 3 gallons per minute.

asked by COFFEE on July 13, 2007
31. chemistry

magnesium reacts with sulphuric acid according to the equation: Mg3 + H2SO4=MgSO4 + H2 a 250cubic centimetre aqueous solution containing 9.8g of sulphuric acid is added to 6g magnesium a. show that the magnesium is present in excess Does it have something

asked by Annonymous on August 31, 2018
32. Math

Can someone show me how to solve these questions. A plane is is flying 240 mph heading N60°E. The wind is blowing S30°E at 30 mph.   6. What is ground speed of the plane?    The ground speed of the plane is 266.40. 7. What is the smallest angle in the

asked by Crewniverse on March 16, 2014
33. Physics

I must show my work for full credit. I need help on this question. I don't need answers, but could you help me figure it out. Thanks A microbiologist measures the speed of a swimming bacterium. The bacterium covers a distance of 2.16 microns in 5.0

asked by Mary on September 26, 2013
34. Calculus

Find the integral, using the method of substitution where necessary. 63. integrate x^2*Sqrt[x+1] dx What I have done: I have set the (x+1) = u but I feel this is the wrong way to do this problem.

asked by Molly on December 9, 2007
35. Java programming

Create an applet to draw a digit using the method fillRect of the class Graphics. For instance, if the input is 4,

asked by Poohboi on December 24, 2017
36. Science

Which way of finding mass is more accurate: using the electronicbalance or the triple beam balance? What mistakes could have been made with each method?

asked by CD on September 18, 2018

True or False. To find a sales tax of 6% on a purchase of $90.00 using the proportion method you would write the following: 6/100 = ST/$90?

asked by Amber on March 2, 2010
38. Geometry

asked by haley on February 10, 2013
39. Math Algebra

asked by Keonn'a on November 27, 2018
40. Euler's method help in Calculus?????

Let dy/dx=xy . Use Euler's method with step size of 0.5 and the initial condition of y(0) = 3 to estimate y(2). I really am not sure if I did this right, but I got 3.4568 for y(2). I actually feel like it is wrong.

asked by Jane on December 9, 2014
41. biology

There are two methods used for cutting DNA into small pieces – this is via ultrasound and restriction enzymes. Which method is considered better and why?

asked by William on May 21, 2008
42. Mat 116

substitution method 7x +9y= 19 x=25-5y I read over all the problems I do not see any errors I can find. Please point this out! After this I have another problem 0.1

asked by Robin on April 11, 2010
43. calculus

Use the shell method to find the volume of the solid formed by rotating the region bounded by y=x^3, y=0, x=0, and x=2 about the line x=3.

asked by Liz on January 30, 2013
44. mathematical physics

Separate the following partial differential equation into a set of three ODEs by the method of separation of variables: d^2u/dt^2 =c^2,[d^2u/dr^2+1/r du/dr+1/r^2 d^2u/d theeta^2]

asked by gourav on March 28, 2015
45. calculus

Suppose f satisfies the differential equation dy/dx=y+1 and f(0)=1. In other words, f′(x)=f(x)+1 and f(0)=1. Use Euler's method with a step size of 0.5 to approximate f(1.5).

asked by Joe on March 12, 2013
46. Science

Describe briefly a general method that could be used to find the density of a substance. that the question im not quite sure of the answer some help would be nice.... thank you!

asked by Lenny on September 6, 2007
47. Calculus

Let R be the region bounded by y=x^2, x=1, and y=0. Use the shell method to find the volume of the solid generated when R is revolved about the line x=-11.

asked by Becca on January 29, 2012
48. Math

The region bounded by the given curves is rotated about the specified axis. Find the volume V of the resulting solid by any method. x = (y − 6)^2, x = 1; about y = 5

asked by Em on January 24, 2013
49. English

how does the importance of traveling for the development of Descartes's method compare to Swift's use of travels as a literary device in his novel?

asked by Stacy on February 17, 2007
50. Math

what is the volume of the solid obtained by rotating the region bounded by y=x^2, and y=5x about the line x=5 using the washer method and respect to dy?

asked by Anonymous on February 4, 2018
51. Calculus 2

Use the method of cylindrical shells to find the volume V generated by rotating the region bounded by the given curves about x = 4. y = 3 x^4 y = 0 x = 2

asked by Liz on June 21, 2013
52. algebra 2

I'm stuck on this one: factoring polynomials from algebraic expressions (and it says you can use the substitution method): 3m^2(2p^2+3)over (x^2+y)(2x-y^2) minus 6m(2p^2+3)over (y^2-x)(2x-y^2)= Do I find the GCF? I get 3m(m-2) over (x^2+y)(2x-y)(y^2-x)

asked by dan on August 15, 2010
53. CHEMISTRY

In half reaction method of the chemical equation balancing , how about those redox reactions that they don't contain any (H) and ( O ) atoms ?

54. General Psychology-5

You have decided to use the case study method to investigate a mother’s experience in raising a child with autism

55. Math

The method of computing finance charges is based on the average of credit balances from each day during the month?

asked by Dylan on December 10, 2007
56. Computers

Which of the following is not found in the header of a Java method A. a return type B. a parameter list C. modifiers D. statements

asked by Awesome on November 6, 2015
57. chem 101

using the unit conversion method derive an equation to calculate heat produced from the HCl-Na OH reaction

asked by andrew on October 26, 2010
58. finite math

when doing minimization problems and there is more than one negative constant in the far right column is there a method for choosing the proper one to go with or is the process entirely arbitraru

asked by chris on March 4, 2007
59. math

Question: Given that h and k are the roots of quadratic equation 5x^2-10x+2=0, find the value of h^2+k^2 I have used alpha + beta method to do but it not works

asked by jiayi on March 15, 2016
60. newton's method #2

i want to verify that when newton's method is used to compute sqrt(R) (by solving the equation x^2=R), the sequence o iterates is defined by x_(n+1)=.5(x_(n) + (R/x_(n))

asked by Julie on September 28, 2008
61. Physics

Which method of sliding a block of ice requires less force—(a) pushing or (b) pulling at the same angle above the horizontal?

asked by L on October 8, 2014
62. Calculus

Let R be the region bounded by y=x^2, x=1, and y=0. Use the shell method to find the volume of the solid generated when R is revolved about the line y=-2.

asked by Becca on January 29, 2012
63. chemistry

balance the following equation by half reaction method in an acidic medium: C3H8O + MnO4^- gives off C3H6O + Mn^2+

asked by Jessy on January 13, 2011
64. community psycology

Qualitative Research Method would you say should be used on this topic ' Police end lockdown at Whitley County Schools

asked by Amber on September 17, 2015
65. CIS

What method of ouput would be best for a hand held computer and why? If you can help to point me in the right direction then I will answer the question myself-otherwise thanks for all answers.

asked by G on July 13, 2008
66. Calculus

Use the disk method to find the volume of the solid formed by rotating the region bounded by y=2x and y=x^2 about the y-axis.

asked by Liz on January 30, 2013
67. Calculus

Use the disk method to find the volume of the solid formed by rotating the region bounded by y=2x and y=x^2 about the y-axis

asked by Liz on February 4, 2013
68. calculus

Use the shell method to find the volume of the solid generated by revolving the plane region about the line x = 9. y = 7x − x2 y = 0

asked by DER23849 on January 24, 2012
69. maths

find the following lonear equqtion by mtrix method 12p+4q+17r+11s=5 14p+8q+9r+4s=8 3p+7q+2r+5s=12 5p+12q+9r+7s=7

asked by saloni on February 8, 2015
70. statistics

there are 450 employee in an organization. using the method of random sampling numbers, select a sample of 20 employees

asked by Anonymous on September 8, 2014
71. Accounts

A farmer bought a machine for \$ 3200 it is to be depreciated at a rate of 25% using the reducing balance method .what would be value after 2 years?

asked by Patience on April 7, 2016
72. Calculus

Use your calculator to approximate the integral using the method indicated, with n=100. Round your answer to four decimal places. sqrt(x+4)^dx between 4 and 0.

asked by Jane on November 25, 2011
73. calculus

Use the Newton method to approximate the indicated zero of the function. Continue with the iteration until two successive approximations differ by less than 0,0001 the zero of: f(x)=x^3+2x^2+x-7 between x=1 and x=2, x0=1

asked by soffy on June 9, 2012
74. calculus

Use the disk method to find the volume of the solid formed by rotating the region bounded by y=2x and y=x^2 about the y-axis.

asked by Liz on January 30, 2013
75. shurley grammar

a blue-crystal butterfly jogged cheerfully across the luxurious garden. ~please classify with shurley method!!

asked by calli on January 11, 2012
76. Chemistry

What is a reasonable discussion of the method for the preparation of a sample of lead iodide and hygrated copper sulphate?

asked by Gillian on March 17, 2010
77. Fundamentals of Chemistry

balance the equation by ion electron method. Fe^++ + MnO4- = Fe3+ +Mn2+ (acidic medium) please help me..!!

asked by Aboli on February 14, 2013
78. Physics help

how would you investigate if the half life of water dripping from a burette is constant? I know the method but what equation and principle would ya'll use?

asked by Daggeron on February 17, 2008
79. Chemistry

Why is it desirable in the method of back-titration to have a considerable amount(more than 10mL) of acid added in excess?

asked by E on February 27, 2011
80. mathematical physics

Separate the following partial differential equation into a set of three ODEs by the method of separation of variables. d^2/dt^2 = c^2[d^2u/dr^2+1/r du/dr+1/r^2 d^2/d theeta^2]

asked by gourav on March 23, 2015
81. Science

What is the main method of heat transfer from the core to the crust of earth? A. Conduction B. Convection C. Radiation

asked by Steph on January 12, 2015
82. math

according to arrow impossibility theorem ,it is possible for voting method to satisfy every fairness criteria that the texbook discussed?

asked by laura on November 21, 2016
83. CHEMISTRY

Method for getting correct answer? Thank You! What is Kp for the reaction below, if Kc = 1.13e-3 at 111.2°C? 4A(s) + 5B(g) ↔ 3C(g) a. 1.36e-5 b. 1.15e-12 c. 1.14e-6 d. 8.42e-3

asked by Chemistry on April 6, 2014
84. calculus

Use the shell method to find the volume of the solid formed by rotating the region bounded by y=x^3, y=0, x=0, and x=2 about the line x=3.

asked by Liz on February 4, 2013
85. physics

is increasing the current a valid method to increase the induced voltage when a magnet moves into a solenoid?

asked by hannah on May 1, 2012
86. Algebra 2

I am trying to factor a 4th degree polynomial that does not have any rational roots. I need to somehow get it factored into two quadratics. Anyway know of a method to use. 3x^4 - 8x^3 - 5x^2 + 16x - 5

asked by Brenda on March 8, 2007
87. Biochem

The Na –glucose symport system of intestinal epithelial cells couples the \"downhill\" transport of two Na ions into the cell to the \"uphill\" transport of glucose, pumping glucose into the cell against its concentration gradient. If the Na

asked by MIaow on November 2, 2013

I just cannot seem to be able to grasp the concept of solving polynomial inequalities. Can someone please explain, step by step, how to solve them? Here's a problem I can't solve. Please use this as an example: (x-2)(x-5)

asked by Erin on December 10, 2008
89. Physics

A body moving with uniform acceleration covers 64.4 m in 7s and 110 m in 10s. Find its initial velocity and acceleration. Okay, I know how to solve this, however, i'm not quite sure which equation i'm supposed to use. Am I going to need 2 equations to

asked by Mellissa on December 14, 2014
90. progamming JAVA

1.Write an algorithm, in English, to solve the following problem. Be sure to include pre- and post-conditions! 2.Problem: Solve X mod Y for all positive integers. Do so without using multiplication or division. 3.What is (7 / 3) + (4 % 5)?

asked by Johny on April 17, 2010
91. Algebra

Welp, my last post I wrote wrong and everyone was answering it wrong... my bad Here are the questions: (3√6 +5√10)^2 y = √6x-18 I couldn't figure out how to solve them, and I looked up online and here are the answers. I just need to be able to solve

asked by Wes on March 13, 2017
92. math

you are given two equations which are both true , and yiu are asked to solve for both x and y. you plane to solve this set of eqiutions by substituting part of one equation into the other so you end up with an equation that contains only x's or y's. the

asked by lee on July 5, 2010

what this the answer for this question We can conclude from paragraph a)theories are often revised. b)theories are never modified. c)theories are always changed. d)theories are mostly illogical. The concept that the Earth is a sphere can be traced back

asked by nina on April 19, 2011
94. Pre-Calculus

The formula D= 5e ^-0.4h can be used to find the number of milligrams D of a certain drug that is in a patient's bloodstream h hours after the drug has been administered. When the number of milligrams reaches 2, the drug is to be administered again. WHat

asked by Erica on October 10, 2006
95. Biology

There is a loud crash in the room behind you and you jump. which part of your nervous system caused that response/ A. somatic nervous system? C. central nervous system D. sympathetic branch E. parasympathetic branch My teacher told me b was wrong so that's

asked by Sherianna on December 5, 2015
96. science

It takes 3.38 J of work to stretch a Hooke’s-law spring 5.63 cm from its unstressed length. How much the extra work is required to stretch it an additional 4.22 cm? Answer in units of J

asked by jason on November 16, 2012
97. calculus

1) Integrate (e^x+x)^2(e^x+1) dx 2) Integrate xe^x2 dx Let u=(e^x+x) du=(e^x +1) dx I will be happy to critique your work or thinking. You are posting work for me to do, and I am not inclined to do that, it will not help you for me to do it. I think I gave

asked by Febby on April 13, 2007
98. Ethics and social responsibility

You work hard in your office overtime weekends and early mornings.you get paid well but despise that your coworkers are getting paid the same pay for less work then what you are doing and get promoted ahead of you.

asked by Judy on May 9, 2013
99. Calc

the productivity of a person at work is modeled by a cosine function: 5cos (pie/2 (t)) +5, where t is in hours. If the person starts work at t=0, being 8:00 am, at what times is the worker the least productive?

asked by Anonymous on July 20, 2016
100. Finding Job

Gradually retiring by working fewer hours: Phaed retirement Work Sharing leave time shift work would it be phased retirement

asked by Anonymous on January 10, 2011