# 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 296
1. ## math

For a certain experiment, a student requires 100 cubic centimeters of a solution that is 8% HCI. The storeroom has only solutions that are 15% HCI and 5% HCI. How many cubic centimeters of each available solution should be mixed to get 100 cubic

asked by Mary on August 17, 2010
2. ## physics

Your friend is confused about ideas discussed in chapter 4 that seem to contradict ideas discussed in this chapter. For example, in Chapter 4 we learned that the net force is zero for a car traveling along a level road at constant velocity, and in this

asked by sarah on March 2, 2009
3. ## chemistry

The standard internal energy change for a reaction can be symbolized as ΔU°rxn or ΔE°rxn. For the following reaction equations, calculate the energy change of the reaction at 25 °C and 1.00 bar. Sn(s) + 2Cl2(g) --> SnCl4(l) ΔH°rxn = -511.3 kJ/mol

asked by jake on February 28, 2016
4. ## math

An elementary school is offering 3 language classes: one in Spanish, one in French, and one in German. These classes are open to any of the 93 students in the school. There are 35 in the Spanish class, 31 in the French class, and 22 in the German class.

asked by Amber on October 30, 2016
5. ## Research Methodology and Program Evaluation

Can someone help me with the following questions? When the purpose statement denotes an attempt to identify phenomena, events, or exercises, he or she is using: a. clarifying methods b. quantitative methods c. ethnographic methods d. unreliable method I

asked by Lencho on June 17, 2017
6. ## BIOLOGY HELP!!!!

Does it take energy for polymerization reasctions to proceed or ddo they occur spontaneoulsly?? Why or why not?? http://en.wikipedia.org/wiki/Endothermic_reaction 10. From a bottle of molten nutrient agar you need to pour 20 agar plates each containing 50

asked by BB on October 15, 2006
7. ## College Chemistry

A Galvanic cell consists of Mg electrode in a 1.0 mol L -1 Mg(NO3)2 solution and a Ag electrode in a 1.0 mol L-1 AgNO3 solution. Calculate standard emf for the spontaneous reaction of this electrochemical cell at 25 C, given that the standard reduction

asked by Elleni on October 27, 2010
8. ## chemistry abs spectrum and wavelength analysis

Hello, can someone please help me? I'm stuck on a question: I'm doing an analysis of the absorbance of FeSCN2+ at it's max wavelength (i.e. 450nm where abs=0.154)The species I used to make the solution tested were Fe(NO3)3, HNO3, and KSCN. Now, the

asked by mary on March 23, 2011
9. ## chemistry abs spectrum and wavelength

Hello, can someone please help me? I'm stuck on a question: I'm doing an analysis of the absorbance of FeSCN2+ at it's max wavelength (i.e. 450nm where abs=0.154)The species I used to make the solution tested were Fe(NO3)3, HNO3, and KSCN. Now, the

asked by mary on March 23, 2011
10. ## Algebra

1) There are two pet stores in zacharys town. There are dogs, cats, and hamsters at the first pet store. The second store has dogs, rabbits, and fish. Write a set that represents all of the different pets stores in the town. 4) The cheerleading squad is

asked by Help me?? 3 questions on March 21, 2014
11. ## Algebra

1) There are two pet stores in zacharys town. There are dogs, cats, and hamsters at the first pet store. The second store has dogs, rabbits, and fish. Write a set that represents all of the different pets stores in the town. 4) The cheerleading squad is

asked by Help me?? 3 questions on March 20, 2014
12. ## algebra

Axia College Material Appendix D Landscape Design Landscape designers often use coordinate geometry and algebra as they help their clients. In many regions, landscape design is a growing field. With the increasing popularity of do-it-yourself television

asked by compare and contrast two theories on the causation of crime on January 10, 2010
13. ## chemistry-calorimetric

Develop a detailed calorimetric method for determining the temperature of the warm water sample. Materials: Hot water sample of unknown temperature, Styrofoam cups with cardboard lid and stirrer, Thermometer, Pipets and burets, balance, ice, cold water,

asked by Cerra on October 19, 2010
14. ## Chemistry

A gas expands its volume from 4.7 L to 8.9 L at constant temperature. Answer the following: a) If the gas expands against vacuum conditions, calculate the work (in joules) done by the gas. b) Calculate the work done (in joules) by the gas if it expands

asked by Anon on March 17, 2017
15. ## Algebra

can you show me the steps for this problem (2x)to the 4th power (3xcubed)squared I'd like to help you, but I'm not sure what this problem is supposed to be. You can use the symbol ^ when using exponents. For example, 2x to the 4th power can be typed 2x^4.

asked by maria on March 7, 2007
16. ## Physics

A roll of toilet paper (a partially hollow cylinder with R_2 = 7.5cm, M = 300g, and I = 9.0 x 10^-4 kg m^2) is mounted on a mass-less axle along its central axis. Te roll is initially at rest. Then, at t=0, a child grabs the end of the roll and starts

asked by Bevi on November 22, 2014
17. ## Physics

A roll of toilet paper (a partially hollow cylinder with R_2 = 7.5cm, M = 300g, and I = 9.0 x 10^-4 kg m^2) is mounted on a mass-less axle along its central axis. Te roll is initially at rest. Then, at t=0, a child grabs the end of the roll and starts

asked by Bev on November 23, 2014
18. ## Science

I have been waiting for 30 minutes and noone has answered this question. Please help me! Describe the method you would use to separate eachg mixture. Methods: Picking apart, filtering, using density, using magnetism, dissolving, evaporating. a)sand and

asked by Saquta on December 16, 2010
19. ## grammar...writing

Hello, I wanted to know if I am correct on the question below... Thank You How are the ideas in the folowing two sentences tied together? The best time I had all summer was the night of Sherry's party. The worst was the next day. 1. a connective 2. word

asked by Mandi on July 9, 2007
20. ## business studies

The most important way to improve the work group is for everyone, especially the bosses, to listen to each other. This can be done in regular meetings and by written communications. Suggestions for improvements should be implemented when possible. People

asked by Ms. Sue on June 20, 2005
21. ## PLEASE HELP!

Mary's yard is a mess. She needs to hire someone to prune her trees and shrubs. A landscaping service she calls quotes her a price of \$15 consultation fee plus \$8 an hour for the actual work. Mary's neighbor has offered has offered to help her out. She

asked by Bell on February 7, 2013
22. ## Physics

A child pushes a toy box 4.0 m along the floor with a force of 6.00 N directed downward at an angle 37.0 degrees to the horizontal. (a)How much work does the child do? (b)Would you expect more or less work to be done if the child pulled upward at the same

asked by fluffy on September 9, 2006
23. ## math

I'm having trouble determining when you divide and when you multiply to solve a scientific notation problem. For example: Assume that there are 20,000 runners in the New York City marathon. Each runner runs a distance of 26 miles. If you add together the

asked by Sami on July 18, 2018
24. ## Pre-Algebra

If the perimeter of a rectangle is 38 ft and the width is 9 ft, find its length. [Hint: The perimeter of a rectangle is given by P = 2L + 2W.] I don't know why this is a problem for you. P = 38 and W = 9. Solve for L. You have only one unknown in the

asked by Tammy Evert on July 16, 2006
25. ## Pre-Calc

A polynomial function f(x) with real coefficients has the given degree, zeros, and solution point. Degree: 3 Zeros: -2,2+2√2i Solution Point: f(−1) = −68 (a) Write the function in completely factored form. (b) Write the function in polynomial form.

asked by Ben Dover III on March 2, 2018
26. ## science-important!

I really need to make sure this is correct for tommorow please help! The significance of specific base pairing in DNA is that A) it stabilizes the sugar molecule B) it provides a method for making exact copies of DNA C) it prevents errors in DNA

asked by jake on November 19, 2011
27. ## reading

In 1984 by George Orwell, what do the 3 slogans (war is peace, ignorance is strength, freedom is slavery) mean? I would like to know what EACH suggests about the society. And how is the society able to get people to accept them as logical. I was thinking

asked by Christine on February 28, 2011
28. ## science-important!

I really need to make sure this is correct for tommorow please help! The significance of specific base pairing in DNA is that A) it stabilizes the sugar molecule B) it provides a method for making exact copies of DNA C) it prevents errors in DNA

asked by jake on November 19, 2011
29. ## Personal Finance

1. Joe won a lottery jackpot that will pay him \$12,000 each year for the next ten years. If the market interest rates are currently 12%, how much does the lottery have to invest today to pay out this prize to Joe over the next ten years? 2. Mary just

asked by Sue on October 11, 2008
30. ## Chemistry

Please check my answers. 1. Using the equations, IO3- +5I- + 6H+ -> 3I2 + 3H2O C6H8O6 + I2 -> C6H6O6 + 2I- + 2H+ how many equivalents of IO3- are required to produce enough I2 to oxidize one equivalent of ascorbic acid? Answer: 1IO3- 3I2 3C6H8O6 1/3

asked by Sara on February 27, 2011
31. ## Chemistry--Quick Question

Which of the following are LAWS according to the Scientific Method? It is possible for more than one answer. a. The volume of a gas is inversely proportional to its pressure. b. A solid has a mass of 100.0 grams and a volume of 11.1 mL. c. When a piece of

asked by Kathryn on January 18, 2011
32. ## Health

1. Your respiratory system is the system in your body that is responsible for breathing. True False 2. The lungs are made up of thick fibrous tissue. True False 3. Internal respiration takes place in the alveoli. True False 4. The alveoli are located at

asked by Carryyourtorches on October 27, 2017
33. ## algebra

In our math 116 we have a reading problem , it has several steps to it. I have gotten all the way to the end of the assignment and can't get the last questions. it has to do with Buying a Home, the problem is ( you recently started the paper work to

asked by dedee on July 29, 2009
34. ## calculus

use implicit differentiation to show: d/dx(tan^-1x)=1/(x^2+1)

asked by Lauren on December 16, 2016
35. ## Algebra

Need help rewriting this as a decimal. 5*10^3 + 2*10^2 + 4*10^-1 = If you can please show me how to do this that would be so helpful!

asked by Libby on October 29, 2012
36. ## Math

Explain how you could show five less than a number using an expression?

asked by Alec on October 27, 2009
37. ## algebra

show me how to do this so that i can do my other problems simplify 125-2*5/3^3-3^2-(3^2)

asked by babygirl on September 28, 2011
38. ## Math

How do you show that 2 sides of a trapezoid are parallel?

asked by S.O.S on February 5, 2011
39. ## Maths

Given that the line y=mx+c is a tangent to the circle (x-a)^2+(y-b)^2 = r^2 show that: (1-m^2)r^2=(c-b+ma)^2

asked by Anonymous on May 2, 2017
40. ## Functions - Math - 8

x: 2 | 4 | 6 y: 1 | 0 | -1 Please show me how to find the rule, thanks. such as... y= *equation*

asked by L0vely on May 14, 2013
41. ## 4th grade

explain how you could show five less than a number using an expression

asked by pancho on October 20, 2010
42. ## math

What is the mode of these numbers-19,20,32,26.Show me how you got your answer.

asked by Michelle on December 8, 2010
43. ## Algebra

y-1/x+3=-3/4 solving for y. Please show steps so that I can get a better understanding of this.

asked by tbell on May 13, 2014
44. ## 11th grade

Factor f(x) = x^4 + x^3 – 8x^2 + 6x + 36 completely. Show all steps.

asked by david on February 24, 2010
45. ## math super confused

9 is to 3 as 49 is to_? (9:3::49:_?) Please show and explain the answer

asked by Anonymous on December 12, 2012
46. ## Physics

Show that there is no Brewster’s angle for s polarization.

asked by Bob on October 5, 2011
47. ## Physics

Suppose vectors a&b if a x b=c. Show that c is perpendicular to a&b. Please help me.

asked by Wube on November 16, 2011
48. ## music help

what does neumes and color lines show?

asked by mary ann on November 22, 2013
49. ## college

can you show me examples of negative messages?

asked by carol on November 15, 2009
50. ## Calculus

Show that f(x) = x^3 and g(x) = 200x^3 grow at the same rate.

asked by George on May 4, 2018
51. ## Math

please show how you would divide 35.6728 by 5.246

asked by Kelly on December 13, 2010
52. ## math

explain how you could show five less than a number using an expression

asked by kayalin on October 18, 2010
53. ## calculus too hard help

if y=x^x^x^x... dy/dx=? plz show working thanks got no ideal at all

asked by sam on May 2, 2016
54. ## Math

Can you show us how to find the discriminant of the quadratic x^2 + 2x -2 =0

asked by Allison on November 17, 2011
55. ## chemistry

show how to convert: 0.0023hm to micrometers

asked by Jamal on August 23, 2011
56. ## Calculas

how to find the x intercepts for f(x) = 3x^3+7x^2+3x+1 please show your steps

asked by Sandra on March 23, 2009
57. ## math-need sir-steve badly asap

show that L{f(t)}=f(s) then L{e^(kt)}.f{(t)}=f(s-k) where k=costant L=laplace transformation

asked by dam on May 25, 2016
58. ## 3rd grade math

show me the perimeter using grip paper

asked by galo on June 6, 2010
59. ## 9th grade

how do you show contrast in a visual essay ?

asked by Lucy on June 6, 2010
60. ## CHEMISTRY PH=PKA

use the dissociation constant ka=[H+][A-]/[HA] to show that ph=pka

asked by jewels on October 3, 2012
61. ## Physics

Show that there is no Brewster’s angle for s polarization.

asked by Bob on October 5, 2011
62. ## maths

Show the jumps of five in counting from one to hundreds.

asked by Anonymous on June 6, 2014
63. ## algebra

simplify, and please show me how you did it. I am stumped. 24 divide 1/2 + 5/8 * 6/7 thank you.

asked by sue on May 9, 2011
64. ## Math

Explain how you could show five less than a number using an expression

asked by Calya on February 8, 2016
65. ## math

show whether the statement is true: for all whole numbers n, (-1)^2n =1 and (-1)^2n+1 = -1

asked by kaelyn on February 28, 2016
66. ## boolean algebra - PLEASE HELP!!

simplify the expression (show the steps): x= (~A)(~B)+AB+(~A)(~B)(~C)+AB(~C)+~((A+D)(B+C+D))+~(A+B)B

asked by ghost on February 16, 2019
67. ## english

show me the right website for learning prepositions

asked by r s telagathoty on March 23, 2015
68. ## algebra

Draw a rectangle to show that 5 (x + 2 ) and 5x + 10 are equivalent ?

asked by Rick on January 4, 2016
69. ## Liberal Arts Mathematics

Could you show me the steps on how to figure out the (h,k) radius?

asked by Roxy on October 24, 2012
70. ## Math

What is a counters to show a group that is greater

asked by Anonymous on September 29, 2015
71. ## Algebra

-1/4-3 simplify as integer or fraction Can someone show me how?

asked by Christopher on August 24, 2013
72. ## calculus

Find the derivative. Could you please show me the steps? y = ãx(5-ãx)

asked by Cynthia on November 18, 2009
73. ## 7th Grade English

How did Bethany Hamilton show perseverance????

asked by Laruen on January 17, 2012
74. ## boolean algebra - PLEASE HELP!!

simplify the expression (show the steps): x= (~A)(~B)+AB+(~A)(~B)(~C)+AB(~C)+~((A+D)(B+C+D))+~(A+B)B

asked by ghost on February 18, 2019
75. ## math

show that x(-4,-3) and y(4,3) are endpoints of a diameter of the circle x^2 + y^2 = 25

asked by rose on January 3, 2014
76. ## Maths

Given that the line y=mx+c is a tangent to the circle (x-a)^2+(y-b)^2 = r^2 show that: (1-m^2)r^2=(c-b+ma)^2

asked by Joe on May 2, 2017
77. ## Math

Use the "charges" particles model to show that 9+(-5)=4

asked by Amy on August 29, 2016
78. ## Maths, multiplicative inverse

Show that -3 is a multiplicative inverse of 17 modulo 26.

asked by Mat on November 27, 2016
79. ## writing

please show me a good writing paragraph

asked by Anonymous on November 14, 2011
80. ## maths (trigonometri)

if tanB=3/4 then show that 3sin2B + 4cos2B =4

asked by abhilash on October 4, 2017
81. ## Math

Explain how you could show five less than a number using an expression.

asked by Amaya on January 17, 2012
82. ## math

Let R be a commutative ring in with a^2=a for every element a. Show that a+a=0 for all a in R

asked by Melissa on November 13, 2011
83. ## math

Write in the form y=a(x-p)^2+q please show the steps.. a)y=-2x^2+6x+11 b)y=-x^2-3x-3 c)y=1.5x^2-9x+10

asked by kerri on October 17, 2009
84. ## math

Show that 5x7^n+3+11^n-8 is always divisible by 3 for all numbers for n

asked by Bob on June 10, 2018
85. ## elementary math

show that 1,078 and 3,315 are relatively prime

asked by Anonymous on October 15, 2010
86. ## communication

can anyone tell me a tv show or movie that has misconceptions about listening?

asked by mike on February 22, 2010
87. ## chemistry

Show me how to calculate the mass of 20.0 moles of He?

asked by lupita on November 19, 2011
88. ## Physics

Show that there is no Brewster’s angle for s polarization.

asked by Bob on October 4, 2011
89. ## science

How do I show HCN with the lewis dots

asked by sam on December 14, 2007
90. ## math

Hello, Show the given fractions as equavalent decimals. 5/8 and 13/26 and how you got it.

asked by abbie on October 17, 2009
91. ## english

i need help finding jokes for my talent show

asked by Blair on April 23, 2012
92. ## Math

1) Given that f(x,y)=xy/x^2+y^2, hence show that f(xy) = f(yx) 2) use the mean value theorem to determine the value of c, given that f(x) = cos5x

asked by Beta plus on October 12, 2009
93. ## Math

Show that f(x) = x3 and g(x) = 200x3 grow at the same rate

asked by Elle on May 30, 2018
94. ## Math

Use intermediate value theorem to show there is a root to 2x^3 + x^2 - 2 = 0 on [0,1]

asked by Kyle on March 13, 2013
95. ## math

Show that the set {[2,3],[4,1]} is linearly independent

asked by Tom on September 15, 2010
96. ## Math/Algebra

Need help rewriting this as a decimal. 5*10^3 + 2*10^2 + 4*10^-1 = If you can please show me how to do this that would be so helpful!

asked by Libby on October 29, 2012
97. ## algebra

explain how you could show five less than a number using an expression

asked by lena on October 18, 2010
98. ## math

explain who you could show five less than a number using an expression

asked by lena on October 18, 2010
99. ## Calculus

Let u=f(r) and r=|x|=((x1)^2 +···|(xn)^2)^1/2. Show that􏰀 ∑ (∂u/∂xj)^2 = (f′(r))^2 Please help! it's an assignment due tomorrow

asked by Sarah on September 27, 2015
100. ## Math

Which fraction is equal to 1/5? A.2/10 B.3/10 C.1/15 D.2/15 Can you show me the steps?

asked by Joe on February 9, 2011