# 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 26
1. ## math 5

estimate the number of pencil cases needed to hold 10 thousand pennies . Show your work. 2 estimate the height of a stack of 50 thousand pennies . show your work.

asked by amy on October 17, 2012
2. ## math

Solve the two sided inequality and show the solution on real line 7 < 1-2x ≤ 10 Given two functions as: f(x) = and g(x) = Find fog(x) also find the domain of f, g and fog Simplify, then apply the rules of limit to evaluate

asked by mary on October 25, 2010
3. ## Math

How do you solve 2y-5x=10 using the dual intercept method? I have to solve for X int and y int on a graph. Please help

asked by Layla on August 31, 2014
4. ## Algebra

Solve the inequality 1. m - 7 < 6 2. x + 4.5 more than or equal to 5.5 3.p + 12 > 9 4. Translate the following statement into an inequality: Five less than a number is at least nine. x - 5 more than or equal to 9 Show me how you did the work please?

asked by Annie on November 19, 2014
5. ## math

solve the equation log lower 6(x+9)-log lower 36 x =1 the 6 and 36 should be dropped down, then (x+9) and the x are higher. Please show work

asked by Austin on January 4, 2013
6. ## Analytical Chemistry

Could someone show me step by step how to solve this type of problem? I have to do several of them, and would love to understand what is actually happening! Thank you so much in advance, I appreciate your help and time! Calculate the weight percent of

asked by DeeDee on June 5, 2016
7. ## Algebra

Create a system of equation that has no solution: - write the equations in two different forms(4) Create a system of equation that has infinitely many solution - write the equations in two different forms (4) One important Question: How am I suppose to

asked by Tina on November 24, 2016
8. ## algebra

he is missing 3 cents to buy an ice cream bar. she is missing 5 cents to buy the same ice cream bar. they combine their money but they are still 1 cent short. how much is the ice cream bar? Let x denote how much he has and y denote how much she has. Let p

asked by alejandra on September 9, 2006
9. ## Math

The cooling system of a car has a capacity of 20 liters. If the system is currently filled with a mixture that is 60​% ​antifreeze, how much of this mixture should be drained and replaced with pure antifreeze so that the system is filled with a

asked by Sam on November 8, 2017
10. ## Math

True or false, A solution of a system of linear equations is an ordered pair that satisfies one of the equations in the system?

asked by Megan Ruff on March 1, 2011
11. ## Algebra

Consider the points (3, –1) and (9, 2). (a) State the midpoint of the line segment with the given endpoints. (b) Find the distance between the points. Show some work. Give the exact answer (involving a radical), and also an approximation to three decimal

asked by Kate on June 13, 2009
12. ## algebra 2

A doctor needs at least 60 adults for a medical study. He cannot use more than 40 men in the study. Write a system of inequalities to model the situation and solve the system by graphing.

asked by Kinzie on March 15, 2012
13. ## math 117

I made an error on the one before this because I did not enter the equations. Solve the system of equations by graphing Then classify the system as consistent or inconsistent __dependent or independent 8x-4y=-16 4y-8x=16

asked by shauna on April 30, 2009
14. ## Finance

Assume a \$4,000 investment and the following cash flows for two alternatives. Year Investment X Investment Y 1 \$1,000 \$1,300 2 800 2,800 3 700 100 4 1,900 5 2,000 a. Under the payback method, which investment should be chosen? (Show your

asked by PLewis on April 24, 2011
15. ## Chemistry

I don't really understand these questions and their processes. And I am a bit iffy on redox reactions. For problem 3, can you show a step by step process how to do the problem? Problem 2, I do not fully understand how to do it at all. How would you know

asked by Mika on April 6, 2014
16. ## chemistry

50J of energy is transferred as work is done on the system. 30J of heat is also absorbed by the system. Calculate the change in internal energy.

asked by jaycab on January 23, 2011
17. ## physics

A system does 137 J of work on its environment and gains 95.3 J of heat in the process. Find the change in the internal energy of (a) the system and (b) the environment

asked by anonymous on August 30, 2015
18. ## Chemistry

Assume that a particular reaction evolves 230 kJ of heat and that 28 kJ of PV work is gained by the system. What are the values of delta E and delta H for the system? For the surroundings?

asked by Thalia on December 6, 2012

I did this java program, i just want someone to correct it. In this exercise, you will be writing a simple java program to explore using multi methods. The program is consists of one class (MultiMethods). It will hold more than one methods. The purpose of

asked by ghost on February 21, 2019
20. ## Chemistry

What is the % M/M concentration of 5.00 mL of methanol in 25 g solution of methanol in water? The density of methanol is 0.791 g/mL. The density of water is 1.000 g/mL. What is the % V/V concentration for the solution? Please show work.

asked by Margaret on February 19, 2013
21. ## chemistry

What is the concentration of Ag+ remaining in solution? Calculate the following when 0.250 L of 0.249 M AgNO3 solution is mixed with 0.350 L of 0.300 M Na2CO3 solution. Ksp for Ag2CO3 is 8.46E-12. A) What mass of the precipitate forms? I found out the

asked by hellp on March 31, 2012
22. ## collage algebra 1

solution by the substitution method: 4x + 3y =9 3y + 6 = x

asked by crystal on January 5, 2009
23. ## Math

1. –9p – 17 = 10 (1 point) –3 16 18 –16 2. w over four – 4 = 3 (1 point) –4 28 3 11 3. d over three+ 10 = 7 (1 point) 51 20 0 –9 4. –2(m – 30) = –6m (1 point) –15 –13 –8 8 5. 3n + 2= 8 + 2n (1 point) 3 4 5 6 Simplify the

asked by plz help on January 18, 2013
24. ## algebra

Pick a country of your choice that is experiencing population growth. Using the Library, web resources, and/or other materials to find the most recent population count of the country you have chosen and the population growth rate of that country. Use that

asked by stephanie on November 30, 2009

A system does 210 J of work on its environment and gains 80.6 J of heat in the process. Find the change in the internal energy of (a) the system and (b) the environment. I am not sure how to start this.

asked by Hannah on June 20, 2012

A system does 210 J of work on its environment and gains 80.6 J of heat in the process. Find the change in the internal energy of (a) the system and (b) the environment. I am not sure how to start this. Thank you for the help.

asked by Hannah on June 20, 2012
27. ## math

suppose the tiger cup soccer tournament, 8 teams qualify for the final around. if the organizers adopt a single-elimination method for the final round, i.e, winners play against winners until only team is left. what is the total number of games played and

asked by Anonymous on March 24, 2017
28. ## chemistry

Assume that a particular reaction evolves 241 of heat and that 25 of work is gained by the system. What are the values of delta E and delta H for the system?

asked by LaK on December 10, 2012
29. ## Chemistry

If a system has 2.50 × 102 kcal of work done to it, and releases 5.00 × 102 kJ of heat into its surroundings, what is the change in internal energy of the system?

asked by Harley on November 11, 2011
30. ## Maths

Please show the method of showing root 42 on number line.

asked by Sanjay on August 16, 2017
31. ## math

factorise 7x^2 - 19x + 10 13x - 20 - 2x^2 28n - 10 + 6n^2 please can you show me the method thanks

asked by tom on April 18, 2010
32. ## Math

Find the GCF of the numbers 52 and 405. Show your method.

asked by Anonymous on October 4, 2009
33. ## MATH

USE THE AC METHOD FACTORING 9+^2+5+-4 CAN SOME ONE SHOW ME THE STEP TO SOLVING THIS PROBLEM

asked by mace on February 21, 2013
34. ## math

show 3 ways to estimate 3/5 x 9 1/2 identify each method you use? I am lost!!!!

asked by Jared on February 12, 2013
35. ## Math

Find the least common multiple for the numbers 56 and 96. Show your method

asked by Anonymous on October 4, 2009
36. ## Chemistry

One commercial method used to peel potatoes is to soak them in a solution of NaOH for a short time, remove them from the NaOH, and spray off the peel. The concentration of NaOH is normally in the range of 3 to 6 M. The NaOH is analyzed periodically. In one

asked by Chin on January 12, 2011
37. ## Algebra help!

Please help and I would appreciate an explanation as to how you got to the answer. 1.) Solve the system by triangularizing the augmented matrix and using back substitution. 0.09x-0.15y+0.39 -0.18x+0.35y=-0.88 2.) Solve the system by triangularizing the

asked by Kristen on March 27, 2013
38. ## Algebra 2

Is it me or does this problem not make sense? (you can't solve it) 5. Solve for x in the following system: 6x + 6y = -2 y = -x I also need help in these: 38. We can take the product AB only if the number of columns of A equals the number of rows of B.

asked by mysterychicken on May 1, 2011
39. ## Math

A particular Chemistry book costs \$6 less than a particular Physics book. Two such Chemistry books and three such Physics books cost a total of \$123. Construct two simultaneous equations and solve them using the substitution method. Show your working. I

asked by anonymous on February 23, 2018
40. ## alg 1 college

can you guys please help me wwith a math problem, its asking to solve this equatoion, sqare root5x-4=3x-18. to fkire off first 5x-4= 3x-18 squared. foil thatand you are looking AT 9x squared -54x -54x+324/ add the -54 to 108x.then shoot the 5x to to the

asked by mack on March 20, 2012
41. ## Algebra

A rectangle is 4 inches longer than it is wide. It's perimeter is 28 inches. Write a system of two equations in two variables that describes this information. Then solve the system graphically.

asked by Anonymous on October 7, 2012
42. ## Math

Use a system of equations to find the equation of the parabola y = ax^2 + bx + c that passes through the points. Solve the system using matrices. Use a graphing utility to verify your result. The points are (1,6), (4,3), (5,-2)

asked by anonymous on April 8, 2019
43. ## PHYSICAL CHEMISTRY

A.CALCULATE THE CRYOSCOPIC CONSTANT OF H2O. USE IT TO ANSWER THE FOLLOWING: a WEAK ACID HX is dissolved in water. A 0.250 molal solution has a freezing point of 0.5 C. calculate the value of ka for the acid, where Ka is the equilibrium constant for HXH+ +

asked by TINA5 on November 9, 2006
44. ## science

1. Which of the following is TRUE regarding this situation: Solution A has a pH of 7.38, and Solution B has a pH of 7.42? a.Solution B is more acidic than Solution A b.The pH of Solution A falls within the homeostatic pH range for extracellular body

asked by a on January 28, 2013
45. ## College Alegebra

The line through (1, 3) with slope of 1/2 (I used the point slope equation) y-y1 = m(x-x1) y-3 = 1/2(x-1) (work the parenthesis first) Y-3=1/2x-1/2 +3 +3 Y = 1/2x+5/2 LCD of 2 to convert fractions into whole numbers. 2y = x+5 Answer, however I need to

asked by Rick on August 24, 2010
46. ## Algebra II

Right now we're doing systems of Linear Equations in Three Variables. It says to solve the following system: x - y + 3z = 4 x + 2y - z = -3 4x + 3y + 2z = -5 Whatever I try with this problem (and the others like it) it comes out wrong. I've had about one

asked by Matt on September 20, 2011
47. ## chemistry

Calculate the grams or milliliters of solute needed to prepare the following solutions. 1.)75. g of a 7.0 % (m/m) KCl solution 2.) 1250 mL of a 8.0 % (m/v) NH4Cl solution 3.) 270. mL of a 15.0 % (v/v) acetic acid solution I really just need to know how to

asked by maria on July 17, 2016
48. ## Critical Thinking

Nick is chief engineer in a phosphate fertilizer plant that generates more than 1 million tons per year of gypsum, a waste collected in a nearby pile. Over many years, the pile has grown into a mountain containing 40 million tons of waste. There is little

asked by Aya on November 25, 2011
49. ## algebra ll

solve the system of equations 4x - 3y= 8 2x+ 5y= 9 mutiple choices are (1,1), (5,2) 1(-4,-10) or (2,-2)and choose the correct description of the system of equations. 2x+3y=10 and 4x+6y equals 20 thank you for the help

asked by barba on August 11, 2008
50. ## Math

Show that f is a function one-to-one, if and only if f(x) = 0 for x=0. I cannot solve this demonstration, I know that if both elements are the same and their functions are the same, then is one to one, but in this case they only show me one element. Please

asked by Tatiana on September 19, 2018
51. ## geometry

show that the points A(-4,2) B(1,4) C(3,-1) D(-2,-3) are verticies of a square. please show me how to solve this type of math problem.

asked by alex on August 13, 2012
52. ## pre-algebra

Solve the problem. Please show all of your work. A driveway rises 11 feet over a horizontal distance of 112 feet. Find the slope of the driveway. Round your answer to two decimal places.

asked by cody on June 20, 2011
53. ## Computers

Your sister owns a small clothing store. During a conversation at a family dinner, she mentions her frustration with having to manually track and reorder high demand items. She would like an automated system but has a very small budget. Write a 4-5 page

asked by Kelon on July 14, 2012
54. ## CIS 210

Your sister owns a small clothing store. During a conversation at a family dinner, she mentions her frustration with having to manually track and reorder high demand items. She would like an automated system but has a very small budget. Write a 4-5 page

asked by Tammy on October 17, 2012
55. ## computers

Your sister owns a small clothing store. During a conversation at a family dinner, she mentions her frustration with having to manually track and reorder high demand items. She would like an automated system but has a very small budget. Write a 4-5 page

asked by kara on January 10, 2012
56. ## physics

The dipole moment for a system of charges is defined as d⃗ =∑kqkr⃗ k. (see here for a more in depth discussion of the dipole moment). Determine the magnitude of the dipole moment in m⋅C for a system of three charges (Q=1 μC, Q=1 μC, and

asked by keshav on June 4, 2013
57. ## math - standard form

please could you check the first 2 then explain the method on the other 2 1)5.2x10^6 + 3x10^5 5200000+300000=5500000 5.5x10^6 2)4.2x10^5 + 1.28x10^6 420000+1280000=1700000 1.7x10^6 method please 3)6.5x10^-3 - 3.5x10^-9 0.065-0.000000035=0.064999965 how do

asked by chelsea on September 10, 2009
58. ## math

asked by lisa on April 30, 2016
59. ## Math

6y-x=1 Tell weather x and y show direct variation. Explain your reasoning. If so, find k. Show your work. (Y=kx)

asked by Y on September 15, 2018
60. ## algebra

Show Work Use the intermediate value theorem to show that the polynomial function has a zero in the given interval. f(x)=x^5-x^4+4x^3-4x^2-20x+18 [1.5,1.8]

asked by naomi on June 23, 2016
61. ## math

if a=4 and b=8, calculate the following (show your answer as a fraction (lowest) or in decimal form). Show your work (A+B)² ------- A (A+B)² ------- B

asked by ios7 on September 18, 2013
62. ## math

if a=4 and b=8, calculate the following (show your answer as a fraction (lowest) or in decimal form). Show your work (A+B)² ------- A (A+B)² ------- B

asked by ios7 on September 19, 2013
63. ## Math

What is the probability of tossing two coins and having them both show heads? Show all work. Please help I don't understand this.

asked by Cherie on April 9, 2013
64. ## 8th grade math HELP URGENT!!!

Solve Each equation by first dividing each side of the equation by the number outside the parentheses. When would you recommend using this method to solve an equation? Explain. A. 9(x-4)=72. B. 8(x+5)=60

asked by #HELP!!! on September 12, 2013
65. ## geometry

A scale for a scale drawing is 10 cm:1 mm. Which is larger, the actual object or the scale drawing? Show work. --I understand that the answer is 100 times larger since 10mm equals 1cm. BUT how do I show the work of how this is solved? THANK YOU!

asked by Tim on December 1, 2015
66. ## Math - hw check

The admission fee for student is \$8 and the admission fee for Adult is \$15. In one hour, 12 adults and students enter the museum and a Total of \$131 in admission was paid. Write a linear system to model this problem and solve this problem graphically.

asked by Ray on April 2, 2015
67. ## Math

How do I show that the sum of 2 consecutive integers is always odd? I'm stuck on this question. Can you explain and show how to solve this? Thank you! :)

asked by Anonymous on September 18, 2016
68. ## math

Solve by substitution method: 3x+8y=33 x=31-6y

asked by anonymous on October 27, 2010
69. ## math

solve using multiplication method: 8x-9y=-15 -4x=19+y

asked by guy on February 6, 2012
70. ## math

Solve using factorization method: x2+7x+10=0

asked by Y.Abdulsalam on December 5, 2017
71. ## Math 116AA

Solve using the multiplication method 5/6x=-7/6 X=

asked by Katie A on September 29, 2011
72. ## algebra

addition method:3x-5y=-2 and 5y-2x=-2 how would I solve it since they are not together?

asked by m on February 21, 2011

solve using appropriate method. 3a-12b=9 4a-5b=3

asked by Anonymous on December 7, 2011
74. ## college of the redwoods

x+9y=-42 3x+8y=-50 solve using the substitution method.

asked by paulette on November 9, 2015
75. ## Algebra 1

solve by the substitution method. 5x+9y=53 x=47-7y

asked by Anonymous on May 1, 2011
76. ## algebra

solve by substitution method 9x+7y=-23 x=48-8y

asked by anonymous ally on April 23, 2010
77. ## Math

asked by Krista on May 16, 2010
78. ## Math question

asked by DJ on January 20, 2012
79. ## ALGEBRA

SOLVE BY ALGEBRAIC METHOD Y=3X 1/3X + 1/2y =11

asked by BIBIN on March 21, 2012
80. ## Math

How do I solve this using the substitution method? x+3y=8 3x-2y=2

asked by Anonymous on May 30, 2015
81. ## Maths

solve in simultaneous method a+2b=13 2a-3b=5

asked by Mercy on November 1, 2018
82. ## algebra

how do you use the substitution method to solve x + y =2 y = -2x

asked by Jessi on April 29, 2011
83. ## math

1) 6m+n=47 m-4n=12 can someone help me solve using substitution method?

asked by Kristin on March 13, 2010
84. ## math

Solve using the easiest method x^2-3x-10=0

asked by Jefferey on February 15, 2011

Solve by substituion method 2r-5s=-12 5r+2s=57

asked by anonymous on October 27, 2010
86. ## differential equations

rk4 method with h 0.1 solve for y' = 4x-2y, y(0)= 2; y(0.5)

asked by Carol on August 3, 2016
87. ## Algebra

solve using substitution method 3x-5y=61 3x-y=17

asked by Laura on January 25, 2011
88. ## math

Solve. y=x−8 2x+3y=1 use the substitution method. (4, −4) (5, −3) (2, −6) (0, −8)

asked by Jay on February 9, 2017
89. ## algebra

solve by the subtraction method 5x+6y=0 x=34-8y

asked by bianca last one I promise on April 3, 2011
90. ## algebra

x+3y=-10 7x-5y=34 solve using substitution method

asked by Anonymous on November 29, 2009
91. ## math

solve the inequality using any method x^2-8x+12

asked by kiearra on January 4, 2009
92. ## algebra

solve by addition method x +3y +z =6 3x + y – z = -2 2x +2y – z = 1

asked by sally on March 30, 2012
93. ## Algebra

Use the substitution method to solve -x + 3y=24 5x +8y=-5

asked by Jake on March 23, 2012
94. ## alg math 116

9x +3y=-51,-5x +y=39 solve using substitution method

asked by Juan on February 1, 2010
95. ## Algebra

Use the method of substitution to solve this: 9x+4y=9/2 and y=2x-1

asked by Amy on January 14, 2016
96. ## Algebra

x-2y=.9 4x-3y=13.1 Solve using the substitution method.

asked by Jamie on February 1, 2013
97. ## Algebra

4x+y=42 6x-5y=50 Solve using the substitution method.

asked by Jamie on February 1, 2013
98. ## algebra

Solve using the elinination method 2x+2y=20 2x-2y=4

asked by mema on June 9, 2011
99. ## Math

How do I solve this using substitution method? 7x+9y=-38 -6x+y=50

asked by Edith on February 11, 2012
100. ## Math

Solve using the substitution method -x-3y=-20 5x+3y=40

asked by Chrissy on January 11, 2012