# 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 25
1. ## math

Solve for each system and equations. y=-x-2 y=3x+2 set -x-2=3x+2 solve for x. thanx i was minusing 2 instead of adding two thanx alot

asked by Tony on December 17, 2006
2. ## lab

Number of moles of oxygen gas produced from the complete catalyzed decomposition of 6.80ml sample of a 3.5% solution. Density of the 3.5% solution of H2O2 is 1.01g/ml Let's find out what you know about this and work from there. Show your calculations to

asked by Melba on September 25, 2006
3. ## Algebra II

1) when using cramer's rule to solve the system of equations containing 5x - y = 5 and -3x + y = -9 the denominator for the x and y variables looks like which of these determinants ? a) |5 5 | b) |5 -1 |-3 9| |-3 1| c) |5 -1| |-9 1| d) none of these 2)

asked by anonymous on April 8, 2011
4. ## Math

There 1170 students in a school. The ration of girls to boys is 23:22. The system below describes relatioonships between the number of girls and the number of boys. g+b=1170 g/b=23/22 a. what's the proportion for g when you solve it? b. how do you solve

asked by Angie on March 30, 2009
5. ## MATH HELP

1.Which ordered pair is the solution to y = 2x + 10? a(2, 2) b.(3, -4) c.(-3, 4) d.(1, 6) 2.Solve the following equation: m – 8 = -14 a.m = -6 b.m = 7 c.m = 26 d.m = -4 Solve the following equation: 4/7 x = -16 A)x = 42 B)x = -28 C)x = 23 D)x = -24 Solve

asked by STUDENT on October 6, 2016
6. ## game theory

Consider the following game. Player 2 L R U 6, 1 ........8, 3 Player 1 UM 4, 9........8, 4 DM 7, 2 ............6, 9 D 5, 4...........9, 3 (a) Is there a mixed strategy Nash equilibrium in which player 1 is placing positive probability only to strategies DM

asked by Desperate on February 14, 2011
7. ## Algebra 2 (Math)

Solve by the system of equations by substitution. x + 2y + z = 14 y = z + 1 x = -3z + 6 Anyone able to help me with this? I've been stuck on it all day and can't seem to solve it, it doesn't make any sense to me.

asked by Lucas on November 19, 2015
8. ## MS. SUE - MATH HELP PLEASE

The sum of five times a number and twice a second number is 18, but the difference of three times the first number and seven times the second number is -22. Find the two numbers using the elimination method.

asked by Katalina on January 16, 2014
9. ## math

Solve the two sided inequality and show the solution on real line 7 < 1-2x ≤ 10 Given two functions as: f(x) = x2-x-1 and g(x) = 3/x Find fog(x) also find the domain of f, g and fog

asked by mary on October 26, 2010
10. ## Scenario Question?

Dan is an employee at a regional mid-size computer company that has recently been sold to a larger, national computer manufacturing corporation. Dan is in charge of computer production orders, and because of this recent shift in ownership, his

asked by Ree on May 27, 2008
11. ## Chemistry-Dr.Bob

A solution is prepared by mixing 50.0mL of 0.001 M HCl and 10.0 mL of 0.200 M NaCl. What is the molarity of chloride ions in this solution? My work: (0.001 mol/L)((0.05 L)= 0.005 mol HCl (0.200 mol/L)(0.01 L)= 0.002 mol NaCl 0.005+0.002=0.007 mol of

asked by Sanaya on November 20, 2015
12. ## Biology

"Emma has difficulty sleeping. Her doctor prescribes Deflex. Deflex is a drug which affects the nervous system. Suggest and explain how Deflex affects the nervous system to help Emma sleep." I have missed a lot of time off of school and I understand how

asked by on December 10, 2014
13. ## Math

Hello again, today is my final day of the semester and I started late. So I have tons of work to quickly finish and this math test I am taking is 48 questions. Just a brief description why you might see my name a lot. 1. Which is a solution of the equation

asked by Tia on January 26, 2015
14. ## chem

a system udergoes a process consisting of the following 2 steps- 1. absorbs 79J of heat while 26J of work is done to it 2. system absorbs 26J of heat while preforming 79J of work what is overall ÄE? is it 52J?

asked by mel on November 20, 2007
15. ## math

The scientists Verhulst (1828) where is the natural growth rate of the population when resources are limited and is a positive constant called carrying capacity of the environment. (a) Using sign analysis, find all constant solution and discuss the general

asked by josh on November 6, 2008
16. ## Please help me with this math

Solve for x. and show your work. -3x+5 less than or equal to -22 Note:where it says "less than or equal to" its the less than or equal to sign. Please help me!

asked by Miracle on May 25, 2016
17. ## Math - Logarithm

Solve the following logarithm equation. Please show all of your work. log (5 + x) – log(x – 2) = log 2

asked by Armando on June 5, 2011
18. ## Algebra

Solve each system graphically. 4y = x + 8 3x - 2y = 6 Basically, what I have to do is find at least one point that works. I tried graphing it on graph paper, and it looked like about (1, 3.5). But when I tried placing in the equations, it did even work in

asked by Suzanne on February 18, 2009
19. ## math

Solve the linear system graphically (Dont graph it just solve it) x+ 2y = 8 3x+ 4y = 20

asked by Laura ♥ on December 16, 2014
20. ## Math

How do I solve this? This is confusing. Solve the system using matrices. -3x - y - 2z = -389x + 9z = 1172y + z = 16

asked by Sally123 on September 19, 2018
21. ## trigonometry

Use logarithms and the law of tangents to solve the triangle ABC, given that a=21.46 ft, b=46.28 ft, and C=32°28'30" Also Give checks. I know the use of logarithms is unnecessary but i have to show my solution by using logarithms and that's the only

asked by Anon on February 24, 2011
22. ## College Algebra

Solve the system of equations with ROWOPS program. I know how to do the first step but after that it gets difficult for me, this is the system of equations: 3x + y - z = 1 x + 2y - z = 0 2x - y + z = 4 I used to be able to do these but now I'm getting a

asked by Rebecca on August 2, 2007
23. ## algebra

Suppose Paul kicks a soccer ball straight up into the air with an initial velocity of 96 feet per second. The function f(x) = -16t2 + 96t gives the height, in feet, of the soccer ball after t seconds.Show all work to find the axis of symmetry

asked by sydney on August 7, 2015
24. ## science

Which type of taxonomic system uses what an animal looks like to classify it: a) phenic system b) cladistic system c) genetic system d) observatory system

asked by kk-gothgirl-kk on January 19, 2012
25. ## statistics

11. You are taking a multiple choice examination that has 20 questions in a particular section with 5 possible answers for each question. You did not study for the test and you guessed the answers. The probability that you will get at least 50% of the

asked by meri on July 6, 2015
26. ## Math

You and Bruce Willis are upright in a natatorium of liquid with containers of 5.3 gallons and 3.75. You need exactly 4 1/2 gallons of liquid to create a certain solution. How can you assure that you have exactly that amount? Show your work.

asked by Jeanne on April 2, 2007
27. ## chemistry help~~~~ Please!!!

Sodium-24, t1/2 = 15.0 hr, can be used to study the sodium balance in animals. If a saline solution containing 25 μg of 24^Na is injected into an animal, how long can the study continue before only 1 μg is left? Show work please!

asked by Kim on April 14, 2014
28. ## math stats

When 100 students at UCF were given a calculus problem that required the use of integration by parts, 95 were able to solve it. When 100 FAU students were given the same problem, 68 were able to solve it. What is the test statistic associated with the

asked by mel on August 5, 2019
29. ## chemistry

I am not understanding this molarity stuff. Can someone please show me step by step on how to solve this question? What is the molarity of 0.50 L of solution containing 40.0 g of CaCO3?

asked by Jen on March 9, 2011
30. ## Science

* P is a a black powder, which, when fused with a mixture of potassium hydroxide and potassium nitrate and then treated with water yields a green solution. The green solution turn purple when acidified. -identify P, the green solution and purple solution.

asked by Piom on July 30, 2011
31. ## algebra help

My class is doing a unit on the "completing the square method" which is used to solve quadratic equations. I need help understanding this method. It's not making any sense right now! I have two problems and I need to figure out which number completes the

asked by Bailey on January 4, 2007
32. ## Pre-algebra

Could someone please help me solve the following problems, and show me how to do the work? I am getting confused, and need something to refer to when doing future problems. Thank you so much! (6x+1)(x^2-9x+5) (2x^4+3)(4x^3+2) (12y^3+8y^2+20y) div. by 2y

asked by Sherrie on December 10, 2011
33. ## Trig/PreCalc

Teach me how to express 5sqrt3 - 5i in polar form please. I don't want you to do the work for me. Just show me the steps I need to do the work properly on my own. Otherwise I will not pass this class or the exam when I enter college, and I do not want to

asked by tabby on April 13, 2012
34. ## Adminstrative Office Procedures

Your new employer owns a small dry cleaning service. She tells you that she’s considering installing a telephone system. Which of the following would be the best for her? A. A remote access system C. A PBX system B. A key system D. An automated answering

asked by Anonymous on February 6, 2011
35. ## College Algebra

Solve the logarithmic equation. Express your solutions in exact form only. Please show all of your work. log base 6 (64x^3+1)-log base 6 (4x+1)=1

asked by Jo on January 18, 2012
36. ## PHYSICS HELP

If the external world does work on the system, the energy of the system increases , decreases or remains the same? I think it increases. Am I correct? The system increases. Yes, you are correct.

asked by Pat on January 10, 2007
37. ## algebra 2

samara solved 1/5 divided by 10 by using a related multiplication expression. Which multiplication expression did she solve? Please show work and help answer thanks

asked by stefie on May 14, 2014
38. ## 5th grade math

Using the butterfly method, which fraction is less 1/4 or 1/3 - I know the answer but using the butterfly method the answer does not work out? Am I doing something improper? Thanks!

asked by Diana on November 30, 2010
39. ## Math

1. Marissa is a photographer. She sells framed photographs for \$100 each and greeting cards for \$5 each. The materials for each framed photograph cost \$30, and the materials for each greeting card cost \$2. Marissa can sell up to 8 framed photographs and 40

asked by Jessica on January 20, 2014
40. ## math

show three ways to estimate 3/5 x 9 1/2.identify each method you use.

asked by LAKSHMI on February 3, 2015
41. ## MATH

SHOW THREE WAYS TO ESTIMATE 3/5 X 9 1/2. IDENTIFY EACH METHOD YOU USE.

asked by ALEXIS on March 24, 2013
42. ## Maths

determine if this is a function? y= x show working method please

asked by Mathsnewbie on March 23, 2011
43. ## math estimating products

Show three ways to estimate 3 / 5 ×9 1/2. Identify each method you use.

asked by ashley on February 5, 2015
44. ## MATH

Show three ways to estimate 3/5 ¡¿ 9 1/2. Identify each method you used.

asked by Joanna on March 2, 2015
45. ## Chemistry

At equilibrium, it was found that [CH3COOH] = 0.8537 M, [CH3COO-] = 0.0040 M, and [H3O+] = 0.0040 M. Calculate the acidity constant of CH3COOH and the pH value of the solution. - Please show how you solve the problem.

asked by Lisa on March 25, 2012
46. ## college algebra

Solve the following inequality. x^3+9x^2-108 less or equal to 0. Then write your solution in interval notation. I am sooo confused and do not have any idea how to do this. Can someone please show me step by step please??? Thanks in advance. Someone who is

asked by allison-please help!!! on December 25, 2012
47. ## chemisty problem help

Carbon-12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 70 pm. Calculate the volume of the nucleus and the volume of the atom. What percentage of the carbon atom's volume is occupied by the nucleus? Can someone tell me how

asked by Tagen on February 8, 2007
48. ## math

tell wheter the system has one solution, infinitely many solutions, or no solution: y=3x-14 y-x=10

asked by Taylor on January 14, 2013
49. ## Math; PLEASE HELP.

Tell whether the linear system has ONE SOLUTION, NO SOLUTION, or INFINITELY MANY SOLUTIONS. 4x-y=2 -x+3y=9

asked by Izzy on January 9, 2012
50. ## Math

Tell whether the linear system has ONE SOLUTION, NO SOLUTION, or INFINITELY MANY SOLUTIONS. 4x-y=2 -x+3y=9

asked by Izzy on January 9, 2012
51. ## ALGEBRA-Help please

Find the solution to the following system of two linear equations, if it has a solution. x+3y=4, 3x+9y=12

asked by Megan on October 13, 2011
52. ## math

tell whether the system has one solution, infine\itely many solutions, or no solution y=3x-14 y-x=10

asked by Taylor on January 14, 2013
53. ## algebra

Does the system of equations have no solution, one solution, or infinitely many solutions? y = x + 4 y – 4 = x

asked by Laura on December 21, 2012
54. ## algebra

Does the system of equations have no solution, one solution, or infinitely many solutions? y = 2x – 3 y = –x + 3

asked by Laura on December 21, 2012
55. ## algebra/functions

recent estimates indicate that the area covered by glaciers has decreased from over 25.5 km^2 in 1850 to about 16.6 km^2 in 1995. Let A=f(t) give the area t years after 2000, and assume that f(t)=16.2-0.062t. How much glacier area disappears in 15 years?

asked by luckybee on January 28, 2012
56. ## math

help with these 2 questions 1, 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
57. ## Math

Use back substitution to solve the system of linear equations x-2y+z=8 y+z=5 z=2 **I tried to solve it eventho im still confused/lost. 1=3 idk ugh

asked by Anonymous on June 17, 2014
58. ## college chem

A 1.10g- sample contains only glucose and sucrose . When the sample is dissolved in water to a total solution volume of 25.0ML , the osmotic pressure of the solution is 3.78atm at 298K a.What is the percent by mass of glucose in the sample? b.What is the

asked by mm on January 25, 2010
59. ## algebra

simplify and show all work 11+12^2-(-11)*12 is this right11+144-(-11)*12 155-(-11)*12 144*12 1,928 simplify -(8m)-(-7m+2) 15m-2 according to order of operation what should be done first when evaluating this expression do not solve [10-(-2+1)]-9

asked by babygirl on September 3, 2011
60. ## Math

Ok I need help to figure out how to solve this problem 4 working move into town looking for work. A local business offers them 200 hours of work. The catch is, they have to work the same number of hours as they do days. I.E. if they work 8 hours they have

asked by Mo on August 17, 2010
61. ## physics

a lot of ppl in my science class have trouble with this problem... pls show your work if you know how to solve it. A juggler throws a ball from height of 0.950 m with a vertical velocity of +4.25 m/s and misses it on the way down. What is its velocity when

asked by kaylee on December 21, 2010
62. ## Algebra II

If one leg of a right triangle is 5 times the square root of 3 centimeters, and the hypotenuse is 2 more than the other leg, what is the length of the other leg? While it does say please show my work, I literally have NO idea how to solve this, and this is

asked by Trip on May 25, 2016
63. ## Painting

why did painter meissonier place napoleon at the front and center of this art work? The Walters Art museum Baltimore. A. To show his small size B. To show his central importance C. To show his entire figure D. To make wise use of space•• Correct this

asked by Tia on February 19, 2016
64. ## algebra 1

*I have asked countless people to help me with this story problem and nobody seems to know how to do it! Please help! Natalie performs a chemistry experiment where she records the temperature of an ongoing reaction. The solution is 93.5º C after 3

asked by Brittany on May 2, 2013
65. ## algebra

The area of a trapezoid is given by the formula A = 1/2 (b 1 + b 2)h, where base b 1 is parallel to base b 2 and h is the height. Solve the formula for b 2. Show your work

asked by Anonymous on February 1, 2017
66. ## english

are both of these a compound or simple sentences I need to have these as a model for the other one's. 1. Her mother went to trade show, but doreen stayed home. 2. Wang and his brother looked at the problem and spotted the solution. i think: 1. compound

asked by liz on October 30, 2006
67. ## Pre-Calc/Trig...

Solve using any method. 1. 2x^2+5x-3=0 2. -x^2+x+1=0

asked by Anonymous on October 15, 2014
68. ## math grade 10

Solve 3p-6q = 0 4p+1q = 3 Using any method Thank you!!!!

asked by rose on September 23, 2013
69. ## Algebra 1

what method would you use to solve y=x?

asked by Steve on March 22, 2015
70. ## Calc

how do I solve this arcsin(4/5) note that I am not looking for about 53 degrees I believe I'm suppose to solve euler's formula for x i.e. sin (x) = (e^(ix) - e^(-ix))/(2i) where x is in radians hence I would do something like this sin (x) = (e^(ix) -

asked by Kate on July 20, 2010
71. ## chemistry

I have no idea how to solve this problem, please help me out.... thanks a) A liter of a solution saturated at 25degree with calcium oxalate, CaC2O4, is evaporated to dryness, giving a 0.0061gm residue of CaC2O4. calculate the concentrations of the ions,

asked by wendy on April 6, 2007
72. ## algebra 2

Classify the system , and determine the number of solutions. This system is inconsistent. It has infinitely many solutions. This system is consistent. It has infinitely many solutions. This system is inconsistent. It has no solutions. This system is

asked by Kim on July 24, 2008
73. ## Physics

Heat is added to a system, and the system does 35.0 J of work. If the internal energy increases by 17.0 J, how much heat was added to the system?

asked by AMOOON on May 24, 2016
74. ## Art of Research

I need to do an interview segment for a "show green", which is a storyboard for a TV show. It will include production notes as well. My topic for this show green is on the business of the National Hockey League, in terms of their revenue, salary cap, free

asked by Alex L. on November 21, 2013
75. ## Chemistry

Determine how many mL of solution A (acetic acid-indicator solution) must be added to solution B (sodium acetate-indicator solution) to obtain a buffer solution that is equimolar in acetate and acetic acid. Solution A: 10.0 mL 3.0e-4M bromescol green

asked by Jake on October 29, 2012
76. ## chemistry

Will you help me use the half reaction method to balance these equations. I need to add water molecules and hydrogen ions in acid solutions. I also need to keep the balanced equations in net ionic form. thanks 1) Cl-(aq) + NO3-(aq) --> ClO-(aq) +NO(g) (in

asked by CLO on August 24, 2015
77. ## Chemistry

Using the change in oxidation number method, balance the redox reaction shown below. (NO2^2)+ (MnO4^-)---> (NO3^-)+ Mn^2+ Divide into half reactions. I will show you how to do MnO4^- and you do the other one. MnO4^- ==> Mn^+2 Step 2. Determine the

asked by Aubrey on June 17, 2007
78. ## algebra

how do I solve this and show the work: a motorboat went upstream at 15 miles per hour and returned downstream at 20 miles per hour. How far did the boat travel one way if the round trip took 3.5 hours?

asked by jessica on May 29, 2013
79. ## math

solve the following exponential equation:show your work. e^x-e^-x/2=7 1. write exact answer. 2.write answer approximated to 3 decimal places. whaaaat? smh I don't get it at all.

asked by ayonna on March 27, 2013
80. ## Chemistry

I am having a horrible time with Enthalpy change. I understand how to find specific heat I believe, but the heat capacity of the vessel is given as 10 J/K. My problem is that my professor did not show us how to work this type of problem, and I desperately

asked by Casey on July 2, 2010
81. ## Need all the help i can get

Hi i'm pretty new to this and i don't know what to do?So i put these questions up im not sure if my answers will show up because i used color letters, but i need help checking and explaining steps N 108 is 36% of what number? Write and solve a proportion

asked by Rainbow Dash on January 7, 2016
82. ## Chemisty

A 0.5-L saturated solution of silver chloride, AgCl, is evaporated to dryness. The residue is equivalent to 1.4 x 10^-3 mole. Calculate the experimental value of the Ksp of silver chloride. Show all of your work.

asked by Jonah on May 5, 2012
83. ## Math

5. A system of linear inequalities is shown below: x + y ≥ 4 y < 2x – 3 Describe the steps to graph the solution set to the system of inequalities. Be specific. (10 points)

asked by Cookie_Monster_ on January 14, 2015
84. ## statistics- normal standard distribution

a set of data is normally distributed with a mean of 500 and standard deviation of 100: *what would t he standard score for a score of 700 be? According to my calculations 700-500/100=200/100=2 how would i interpret that. please show work. i know that i

asked by mary- please check calculations. on October 27, 2010
85. ## health

Your health care organization has called upon you to lead a work team to identify service-quality problems within the environment. Individual Portion Answer the following questions about work teams: •What are the benefits of a strong work team? •What

asked by Laura on May 6, 2012
86. ## Algebra

Stuck on this problem Find values for m and b in the following system so that the solution to the system is (-3,4) 5x+7y=b mx+y=22 5(-3) + 7(4) = b b = -15 + 28 = 13 m(-3) + 4 = 22 -3m = 22-4 m = 18/-3 = -6 Thank you Sanchi....I will use this as a template

asked by Misty on August 6, 2007
87. ## math,help!!!!!

Let A be a 2*3 coefficient matrix ;A a)If the system Ax=b is consistent is the solution unique? why or why not? explain b) how many pivots must A have to gurantee that Ax=b has a solution for every vector b in IR^2? c) can the columns be linearly

asked by jasmine20 on February 11, 2007
88. ## Algebra 2

Graph the linear system and estimate the solution. Then check the solution algebraically. 7x+y=-17 3x-10y=24 I have to have 4 labeled points and I'm not getting the fraction thing. Any help would be great!

asked by Anonymous on October 15, 2013
89. ## Finance

Danny Joe borrows \$10,500 from the bank at 11 percent annually compounded interest to be repaid in six equal annual installments. The interest paid in the first year is: \$_________. (Please calculate the arithmetic solution and show your work)

asked by Vaness on December 30, 2011
90. ## Math

Hi, can someone pls give me an idea how to do this? Thanks! Use substitution to solve the following system. L+r+s=20 R=l+3 L+5r+10s=129 I have to solve for all the variables, and am really confused. Any help is greatly appreciated.

asked by Thanks on October 17, 2018
91. ## math

Solve each system of equations by graphing. Check each solution. The perimeter of a rectangle is 24 ft. Its length is five times its width. Let x be the length and y be the width. What is the area of the rectangle?

asked by Anonymous on February 23, 2013
92. ## ALGEBRA

solve this system of equations and solve for triple pair: x+y+z=8 2y+4y+2z=26 -x+8y-3z=26

asked by XOCHIL on March 30, 2012
93. ## algebra

Solve the system of equations. 9x + y = 2 –4x – y = –17 I don't understand how you solve this.

asked by Emma on June 16, 2014
94. ## Math

how do you solve this system? I'm using substitution.. y=3x+4 y=-x^2 First I combined it: -x^2=3x+4 I don't know how to solve it now..

asked by Angie on May 6, 2009
95. ## math

1 . Kyle has \$4 more than twice as much money as Lana. Lana has x dollars. Kyle does not have enough money to buy a video game that costs \$56, but he has enough money to buy a textbook that cost \$38. A. Write a compound inequality that represents all the

asked by i am failing on May 24, 2019
96. ## physics

work & energy homework problems: please help me =] my teacher is bad a teaching how to do stuff =/ 1)A 5.000kg plastic ball moves with a velocity of 10.00 m/s x. It collides with a second plastic ball of mass of 10.00kg at rest. The collision is completely

asked by alissa on December 16, 2007
97. ## Chemistry AP

Calculate the pH of a 0.44 M aqueous solution of NH4Cl. Kb = 1.8 × 10−5 . I've tried used the Ka=Kw/Kb equation then used the resulting 5.5e-10 in Kw=([H+][Cl-])/[NH4Cl] , using that to get the [H+], but it isn't correct and I don't know what else to

asked by Ethan on February 5, 2015
98. ## PreCalculus

The question is: -5e^(-4x+2) +3= 1/2log(1+x^2) Solve with a calculator for the smallest possible solution, with steps. So this hasn't really been covered in my schoolwork so I'm trying to work off what I have learned. I started with the change of base

asked by ConfusedWithMath on November 15, 2017
99. ## Math

please show me how to do this... A statement Sn about the positive integers is given. Write statements S1, S2, and S3, and show that each of these statements is true. Show your work. Sn:   12 + 42 + 72 + . . . + (3n - 2)2 = n(6n^2-3n-1)/2 Also, please

asked by Taylor on March 14, 2016
100. ## QSO 51O

Problem 4: Module 8 (30 points) The Exeter Company produces two basic types of dog toys. Two resources are crucial to the output of the toys: assembling hours and packaging hours. Further, only a limited quantity of type 1 toy can be sold. The linear

asked by Anonymous on March 1, 2013