# 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 75
1. ## analytic geometry

the three vertices of a triangle are at A (-4,5), B(-5,3) and C (3,-4), show that the line joining the midpoint of the sides AC and BC is parallel and equal to one-half of AB . solve

asked by rachel on July 16, 2014
2. ## math,algerbra

find circumference and area of circle use 3.14 for unknown round to nearest tenths. 2) r=11.5 3)d=3.5 show steps to solve

asked by Anonymous on December 6, 2012
3. ## Math

You have \$5 for lunch. You bought a turkey sandwich for \$2.25. Write and Solve an inequality to show how much more you can spend. Thank you in advance for the help. I cannot seem to figure this out!

asked by Mystery Girl on February 22, 2016
4. ## Chemistry

How do you calculate the atomic mass of an element when an isotopic composition is given 99.985% 1H; 0.015% 2H Please show steps to solve!

asked by Jill on October 10, 2007
5. ## chemistry

Which of the following salts would show an appreciable pH-dependent solubility? a. AgCl b. Mg(OH)2 c. BaF d. both b and c e. all of the above I put c as my answer (not sure if its right, but can you explain how you would solve this)

asked by Jin on July 27, 2010
6. ## Chemistry

I was just wanting to make sure I did these right. How many grams of solute are in each of the following solutions? a.) 2.5 L of 3.0 M Al(NO3)3 solution. for this one I get 1600 g of Al(NO3)3 b.) 75 ml of 0.5 M C6H12O6 solution. and for this one I get 6.8g

asked by Carrie on November 29, 2010
7. ## SOCIAL STDIES HELP!

Georgia's Government and Law Are my ansers right? *** Which of the following statements about the state executive branch system of departments and agencies are true? Mark all that apply. (2 points) The system is comparable in purpose to the legislative

asked by XenaGonzalez on February 23, 2015
8. ## social studies (Saudi Arabia)

In what way is Islam most likely to impact Muslims during work days? 1)They must leave work early 2)They will not participate in leisure activities after work 3)They can not have certain jobs 4)They need to pause during their work and pry I think it is 4.

asked by Abby on January 22, 2015
9. ## Math

A school band is having a fundraiser. Band members will sell coupon books for \$10 each. The band earns \$12.50 for every 5 coupon books that are sold. a. After the first week, the band members had sold 105 coupon books. How much money did the band members

asked by Anonymous on January 12, 2015
10. ## math

A school band is having a fundraiser. Band members will sell coupon books for \$10 each. The band earns \$12.50 for every 5 coupon books that are sold. a. After the first week, the band members had sold 105 coupon books. How much money did the band members

asked by Anonymous on January 12, 2015
11. ## science

_____ contain a fuel, rods to control nuclear reactions, and a cooling system. Would Nuclear reactor work??

asked by Katie on September 19, 2010
12. ## algebra

use the Substitution Method. Please give it a try. y = 3x + 4 5x + 3y = 12 Why is the substitution method preferred in this case?

asked by Maya on April 5, 2011
13. ## math

Question:write a system of equation that is linear. can this two equation work? 2x – 3y = –2 4x + y = 24

asked by TD on April 2, 2015
14. ## math

Juan drives to work. Because of traffic conditions, he averages 22 miles per hour. He returns home averaging 32 miles per hour. The total travel time is 2 1/4 hours. Define a variable for the time Juan takes to travel to work. Write an expression for the

asked by Hunter on October 3, 2012
15. ## math plz help

The contents of a jar holds 4 red marbles, 7 blue marbles, and 5 green marbles from which you select marbles at random. What is the probability of selecting a red marble, replacing it, and then selecting a blue marble? Show your your work. Is it 4/16 for

asked by Pink on April 16, 2015
16. ## Math

Suppose that the number of cars, C, on 1st Avenue in a city over a period of time t, in days, is graphed on a rectangular coordinate system where time is on the horizontal axis. Further suppose that the number of cars driven on 1st Avenue can be modeled by

asked by Crissy on August 7, 2010
17. ## general math

A souvenir store charges PHP 15.00 per keychain for orders amounting 50 or fewer keychains, PHP 12.50 per keychains for orders of 75 or fewer but more than 50 kechains. Which function best represents the cost K(x) of the x number of keychains. hi. i hope

asked by Marian on July 21, 2016
18. ## Algebra 2

1. Solve the following for x. 3-(x+(-4))= 2x-6+5x I figured that the answer is no solution. Is this correct? I have been working with my friend on this next problem and neither of us know which is correct. 2. Solve for r. I=P(1+rt) The first answer is

asked by Christian on August 30, 2007
19. ## Chemistry

A is a solution of HNO3 of unknown concentration. B is a standard solution of Naoh 25cm3 portion of solution B required an average of 24.00cm3 of solution A for complete neutralization. (1) suggests with reason a suitable indicator for the reaction

asked by Gideon on March 20, 2019
20. ## Algebra 2

In ￼ ,

asked by Ciaria on March 31, 2015
21. ## math

The electricty cost of a business increased from 12,000.00 one year to 10,920 the next what is the rate of the decrease? show work

asked by shanae on November 6, 2007
22. ## physics

If the breakers at a beach are separated by 5m and hit shore with frequency of 0.3Hz, at what speed are they travelling? Please show all work, Thank you

asked by silly on May 2, 2011
23. ## physics

In the following list of periodic waves, which one is independent of the others: frequency, wavelength,speed,amplitude? Plese show all work Thank you

asked by silly on May 2, 2011
24. ## pre calculus

Having a bit of a problem with this for the given functions f, g and h. find f*g*h and state the exact domain of f*g*h Please show all your work f(x) = inx g(x) = x -169 h(x) = 9x^2

asked by Amy on December 21, 2011

The perimeter of a rectangular field is 380 yd. The length is 10 yd longer than the width. Find the dimensions. Please help and show work thank you

26. ## chemistry

What is the molecular mass of cholesterol if 0.5731 mol weighs 221.6g? I need to show my work using conversion factors. thanks

asked by john on November 17, 2010
27. ## Math

Pablo found that his uncleâ€™s age can be divided by three different prime numbers. What are three possible ages of his uncle? Show your work.

asked by Anonymous on November 15, 2017
28. ## college alg

use the transformations to identify the graph of the function. then determine its domain, range, and horizontal asymptote. f(x)=4+3^X/3 please show work

asked by stumped on September 2, 2012
29. ## Surface Area and Volume

Hi I am confused on how to get the correct answer. The question states: What is the surface area of the sphere if the radius is 16 cm? Please show your work. Thank you!

asked by Tyler P. on March 18, 2016
30. ## calculus

find the location and values of any global extrema of F(x)= x^3-3x^2-9x on the interval [-2,4] (you must show your work by finding critical points

asked by angie on December 21, 2016
31. ## algebra

Katie is finding the standard form of the equations y = x2 + 6x + 4. What mistake did she make in her work? Show the correct answer.

asked by rattler on March 11, 2010
32. ## math

TO EARN MORE MONEY HIS PARENTS LET HIM WEED THE GARDEN FOR \$6.55 WHAT IS KYLE WEEKLY ALLOWANC IF HE ENDED WITH \$11.01 SHOW ALL YOUR WORK A \$8.90 B \$8.91 C \$8.92 D \$8.93 E \$8.94 F \$8.95 G \$8.96 H \$8.97 I \$8.98 J \$8.99

asked by hannah on January 7, 2018
33. ## algebra 1

Find the x and y intercept of this equation: 10x-70y=210 I keep getting the wrong answer. Can you show me how to set it up and work it out?

asked by Brainiac on October 2, 2014
34. ## sequence help!!!!! plz steve,reiny,damon,bob...anyone!!!!

find the expression in terms of n of the nth term of following squences 5,13,32,69,129,221....help plz show it work

asked by emmanuel on March 16, 2016
35. ## physics

17. At what distance of separation, r, must two 5.87 x 10^-8 Coulomb charges be positioned in order for the repulsive force between them to be 64.9 N? You must show your work for credit

asked by lula on March 16, 2019
36. ## Pre-calc

Use the given information to determine the values of sinθ, cosθ​, and tanθ. tan2θ=7/11 ​; π

asked by chizoba on August 13, 2016
37. ## Calc

FInd the derivative of each of the following function. f(x)=xcosx+x^4e^2x All I know is the rule with the e^u equation where you would do e^2x times 1. other than that I dont know what to do can someone please help and show all work I will appreciate it

asked by Sandy on June 14, 2017
38. ## Algebra

In , is a right angle. Find the remaining sides and angles. Round your answers to the nearest tenth. Show your work. a = 3, c = 19

asked by Jamie on January 18, 2017
39. ## math

Find the equivalent measure. 45 feet=___________yards show work I suggest looking up the conversion factor between the two and working from there

asked by Katelyn on March 27, 2007
40. ## calculus

Find the midpoint of the line segment joining the points P1 and P2 P1=(-1,5); P2=(2,0) m=(x,y)=? type an ordered pair Please show work

asked by Lisa on January 1, 2013
41. ## calculus

Find the coordinates of all points on the graph of y=23−x2 at which the tangent line passes through the point (10,26).please show the work i greatly appreciate it :)

asked by mehak on October 30, 2011
42. ## Chemistry

What is the molar ratio of oxygen to magnesium oxide in the chemical equation? Show work 2Mg + O2 ->2MgO

asked by Alexia on March 21, 2019
43. ## geometry

Find the length of arc AC if the diameter, AB, of circle O is 36 cm. Write answer in terms of pi. Show your work for credit.

asked by monkey on August 11, 2009
44. ## Math

o is the center of the regular pentagon ABCDE. How many degrees are there in OAB? Please explain or show work A.36 B.54 C.72 D.108 E.126

asked by Johnny on May 8, 2014
45. ## math

the washing ton monument is 555ft tall. which is closest to its height? i know the answer is 180 but i do not know how to show work for it!!!HELP!!!

asked by Alyssa on May 8, 2011
46. ## math/chem

If aluminum foil has a density of 2.70 g/ml, then how thick would be a 2.22 g sample of foilif it measures 5.0 cm on each side. PLEASE SHOW WORK THX!

asked by john on September 27, 2013
47. ## Algebra

What is the domain of the function f(x)=sqrt(x^4-16)? In interval notation. Please show me how to work this problem out. I cannot find any examples in my book. Thanks!

asked by coried on August 18, 2009
48. ## math 115

the question is asking me to divide 4 and 1/5 by 14 and write the results in the simplist form? Can u give me a simular problem and show me how to work it?

asked by amber on September 5, 2009
49. ## Chemistry

Use Hess' Law to calculate the heat of the following equation. Show all work including the reactions that you use, in the form that you use them. 2 C + 2 NO2 ---> 2 CO 2 + N 2

asked by Kat on April 24, 2011
50. ## Chemistry

Determine the percent Composition of each element in phenyl sulfide: (C6H5)2S. Please show work in order to walk me through this.

asked by Kristen on March 27, 2013
51. ## Geometry

The perimeter of a triangle is 45 feet. The ratio of the width to the length is 2:3:4. Find the measure of each side. show work x =       a =       b =       c =

asked by Carrie on February 1, 2016
52. ## math

Omar has the Talk-A-Lot plan. In September, his bill was \$168.00. write an expression and show work

asked by cha on August 18, 2011
53. ## Chemistry

Please help me verify the following question: Consider the following ion; XF2-2 What is the oxidation number assigned to element “X”? Show your work My answer: X F2-2 X -1(-1) X -3=0 X = +3 Please let me know if right. Many thanks!

asked by Dexter on June 14, 2011
54. ## Algebra

Divide. Show all work. Make sure to simplify. Assume no denominator equals zero x^2-144/x^2+7x-60 divided by 3x-36/9x-45 I'm really confused on this and if anyone can help, I'd appreciate it. Thanks!

asked by Emily on June 5, 2014
55. ## counting

My daughter home work wants her to count the animals in each picture and draw the correct number of counters to show how many

asked by Anonymous on September 15, 2014
56. ## algebra

(a minus sqrtx)^2=25 I have no idea of how to work this problem where i in up with the answers of a=7,-3. Basiclly I just gave it a guess. Could someone show the steps I need to take. Thanks.

asked by jessica on September 5, 2010
57. ## chemistry

How many liters of CO2 form at STP if 5.0g of CaCO3 are treated with excess hydrochloric acid? show all your work

asked by nichole on April 24, 2009
58. ## Science grd 9

Calculate the cost of watching TV for 5 h at night at a rate of 8.8 cents/kW•h. The TV has a power rating of 180W. Please show work

asked by Gagan on December 2, 2010
59. ## Algebra

I need help solving the trinomial (x squared minus four x plus seventeen equals twentynine). It has to be in 3 different methods and I have to show work but I don't know how to do it. Please help.

asked by Mike on April 26, 2009
60. ## General Chemistry

Balance the following equations: a. C + O2 CO b. CO + O2 CO2 c. H2 + Br2 HBr d. K + H2O KOH + H2 e. Mg + O2 MgO please explain and show work.

asked by Kendra on May 24, 2010
61. ## Genera Chemistry

Balance the following equations: a. C + O2 CO b. CO + O2 CO2 c. H2 + Br2 HBr d. K + H2O KOH + H2 e. Mg + O2 MgO please explain and show work.

asked by Kendra on May 24, 2010
62. ## physics

How much time will it take a car travelling at 88 km/hr (55 mi/hr) to travel 500km? Show work for credit and include final units.

asked by Anonymous on February 5, 2017
63. ## Geometry

The measure of a single angle in a regular octagon is (4x + 12)°. Find the value of x. Show equations and all work that leads to your answer

asked by Clarissa on January 5, 2011
64. ## algebra

Perform the indicated operation and, if possible, simplify. Please show all of your work. Write your final answer exactly as a fraction in lowest terms. 14/45 / 26/27

asked by Anonymous on October 12, 2011
65. ## math

Find the values of x and y in the two equations below then answer the question that follows. 2^-3=1/x 7^y=1/49 What is the value of xy ? For the first problem i got 8. For the second one i got 1/343 I don't know what im doing wrong or right. Can you please

asked by James on October 12, 2016
66. ## Algebra

Pick a number. Multiply by 2. Subtract 8. Divide by 2. Add 4. What is the result? Use algebra to show why the tricks work.

asked by Cheyenne on May 15, 2018
67. ## science

The projectile is fired at an angle of 45 degree to the horizontal with an initial speed of 100 feet per second. Show work.

asked by kasey kim on March 14, 2011
68. ## math

a family walked 15 miles in one day . at that rate how many would they travel in 5 days? make a table to show your work

asked by jill on April 4, 2013
69. ## Biology

If 25 individuals were alive in 1955 and 500 existed in 2013, what is r? Show work please! a) 475 b)2.99 c)0.052 d)0.029

asked by Need Help Urgent on November 5, 2015
70. ## chemistry

balnce this equation, and show work Crl3 + KOH + Cl2--> K2Cr2O7 + KIO4 + KCL + H2O

asked by cece on April 29, 2012
71. ## Science

While traveling along a highway a driver slows from 24 m/s to 15 m/s in 12 seconds. What is the automobile's acceleration? How would I show the work and find this answer?

asked by Robert on October 29, 2012
72. ## Intermediate Algebra

Given logb3 = 0.792 and logb5 = 1.161. If possible, use the properties of logarithms to calculate values for the following show your work logb 1/3

asked by Kris on June 10, 2010
73. ## geometry

The measure of a single angle in a regular octagon is (4x + 12)°. Find the value of x. Show equations and all work that leads to your answer.

asked by Anonymous on March 17, 2011
74. ## Pre-Calc

For the triangle shown, find the length AD. (Assume u = 18, v = 18, x = 10°, and y = 10°. Round your answer to two decimal places.) Show work please!!!

asked by Mike on April 2, 2012
75. ## Statistics

A building contractor claims that they can renovate a 200 sq foot kitchen and dining room in 40 work hours plus minus 5 (the mean and standard deviation respectively). The work includes plumbing, electrical installation, cabinets, flooring, painting and

asked by Jason L on March 2, 2007
76. ## pre calculous

solve each equation algebraically and check it by substituing into the orignall equation. 50e^0.035x=200 3LN(x-3)+4=5 Method of your choice by solving. logx^2=6 Logx^4=2 2x-2^-x/2=4 e^x+e^-x/2=4 500/1+25e^.3x=200

asked by kelly on June 12, 2011
77. ## Chemistry

For the reaction: H2(g) + I2(g) 2HI(g) , Kc = 12.3 at some temperature T. If [H2] = [I2] = [HI] = 3.21 x 10-3 M at this temperature, which one of the following statements is true? 1. ) Not enough information is given to answer the question. 2. ) The

asked by Jerry on October 25, 2009
78. ## chemistry

solve Ka for HX => H^+ + X^- given 0.1M LiX at pH=8.9 Chemistry - DrBob222, Tuesday, March 30, 2010 at 6:32pm LiX(aq) ==> Li^+(aq) + X^-(aq) Question for DrBob222 - is the X^- value in the ICE calculations 0.1 from the initial LiX 0.1M? X^- is a base and

asked by Larry on March 30, 2010
79. ## Health

"Smoking causes drastic changes in the _______ system, which is responsible for converting foods into the nutrients the body needs to survive." This is a question on a health crossword puzzle given to me by my teacher. Problem is, I know nothing about this

asked by Caley on December 5, 2006
80. ## math

List the ages of two people in your life, one older than you and one younger than you. It would be best if the younger person was 15 years of age or younger. Find the prime factorizations of your age and the other two persons’ ages. Show your work listed

asked by Anonymous on June 27, 2011
81. ## math

1. Provide two examples of a function: (1) as a table of values and (2) as a graph. Explain the definition of a function. Be sure to include mathematical vocabulary in your response. 2. In a paragraph, explain what the domain and range is for the function

asked by lola on April 29, 2019
82. ## chemistry AP

You have to design a buffer based on one of the systems below System 1: HA1 and A1-1 K= 4 E-3 System 2: HA2 and A2-1 K= 5 E-4 System 3: HA3 and A3-1 K= 6 E-5 For the following parts assume that the buffer above in system2 has been constructed with [HA] =1M

asked by maya on March 27, 2010
83. ## Algebra

Hello....I was helped on this question earlier, but I don't understand why we divide by 2? Please help, please see the below: The president will order 5 turkey sandwich combos and 7 steak lunches and spends \$124.00. The other president will get 10 turkey

asked by Mary on December 12, 2016
84. ## Physics helppp

Which of the following statements are TRUE? Select all that apply. An isolated system is one in which objects inside the system are not influenced by any forces from outside the system. The mechanical energy of a pendulum bob is maximized at the bottom of

asked by member of physics on October 23, 2012
85. ## Math

From 6:0000 a.me to 11:00 a.me the temperature went up steadily at 40 degree Celsius at a rate of 2 each hour. How many degree Celsius did it increase? What was the temperature at 6:00 a.m? Solve it using block method

asked by Danilyn on February 3, 2018
86. ## Computer Science

Write a class “Program1” that has the method “allLess” (below) that receives two arrays of integers and returns true if each element in the first array is less than the element at the same index in the second array. For example, given the arrays

asked by Valerie on September 3, 2013

How might U.S. businesses best prepare themselves for a possible elimination of the embargo on Cuba? What kinds of decisions do they need to be making?

asked by Carla on February 2, 2017
88. ## Algebra

Can anyone find links to sites that explain substitution and elimination in an easy to understand way? Thank you! :-)

asked by Cassie on April 22, 2009
89. ## chem

Explain clearly why changes in base concentration do not affect the observed reaction rate of an E1 elimination.

asked by tim on October 23, 2011
90. ## Math

The function r(w) = 2aw-2 + b + c where a, b and c are constants. You are given that r(1) = 5; r’(4) = 12 and r′’(2) = 18. By substituting for w in the above function and its derivatives or otherwise, show that the three given function values give

asked by Krisi on April 3, 2013
91. ## Math

1. The function r(w) = 2aw-2 + b + c where a, b and c are constants. w You are given that r(1) = 5; r’(4) = 12 and r′’(2) = 18. By substituting for w in the above function and its derivatives or otherwise, show that the three given function values

asked by Amy on April 1, 2013
92. ## Algebra 2

Tickets to the school musical cost \$3 for students and \$5 for non students. Total ticket sales were \$1790. The number of student tickets sold was 100 less than twice the number of non student tickets sold. Write a system of equations to represent this

asked by Kelsey on January 22, 2013
93. ## Physics

The vector position of a 3.40 g particle moving in the xy plane varies in time according to the following equation. At the same time, the vector position of a 5.05 g particle varies according to the following equation. For each equation, t is in s and r is

asked by carlton on December 2, 2012
94. ## math

A different eight grader has been asked to work at the face painting booth every half hour. Use division to find how many eighth-graders are needed to work at the face painting booth during the fair. Show your work. I don't understand the division part,

asked by Aswan on March 28, 2015
95. ## Algebra

PLEASE HELP! 1. Part 1: Using the digits 4 and 10, and the variable x, write an equation and solve. Part 2: Using the digits 4 and 10, and the variable x, write an expression and simplify if neccessary. 2.Equation: 10 + 4 = x 14=x Expression: 10(4 + x)

asked by Lori on February 10, 2010
96. ## politics

Which system would work best to provide a new political party a voice in legislative deliberations? A. Ballot initiatives B. Single-member districts C. Proportional representation D. Direct democracy a?

asked by bev on May 29, 2017
97. ## college

YOu come to work on a Monday morning and find that the office computer is not workingt. The system manager tells everyone that the computers hard disk crashed and that all data that were not backed up are lost. What do you do?

asked by Sammy on June 23, 2010

A rectangle has perimeter 64cm and area 23cm squared. Solve the following system of equations to find the rectangle's dimensions. l=(23/w) l+w=32

asked by Anonymous on October 24, 2009
99. ## Pre-Calculus

Could you please explain how to use a matrix (matrices) to solve a system of linear equations (two variables)? My book doesn't explain it in a way I can understand. Please and thank you.

asked by Caroline on January 24, 2013