# 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 29
1. ## Algebra 1

What is the solution to the system? use elimination . -18.6x+ 17.2y=90.2 14.2x+ 3.4y= -35.8 a.(3,2) b.(-3,2) c.(2/3,4/9) d.(2,3) IS IT D?? Terry and ed start a lawn mowing business and purchase mowers and equipment for \$800. They charge \$20 for each lawn

asked by logan. on January 5, 2016
2. ## Algebra 1

What is the solution to the system? use elimination . -18.6x+ 17.2y=90.2 14.2x+ 3.4y= -35.8 a.(3,2) b.(-3,2) c.(2/3,4/9) d.(2,3) IS IT D?? Terry and ed start a lawn mowing business and purchase mowers and equipment for \$800. They charge \$20 for each lawn

asked by Altman Star on January 5, 2016
3. ## math

Andrew claims that a wooden bookend in the shape of a 45°- 45°- 90° right triangle has side lengths of 5 in., 5 in., and 8 in. Is he correct? If so, show the work and if not, show why not. can someone help me?!? i don't get what to do first

asked by Ryan on May 10, 2009
4. ## math

14.a) How many numbers between 100 and 200 can be expressed as powers of 2? Show the steps you follow. b)Which power of 2 is the closest to 1000? Show your work.

5. ## math

14.a) How many numbers between 100 and 200 can be expressed as powers of 2? Show the steps you follow. b)Which power of 2 is the closest to 1000? Show your work.

asked by need help please on September 15, 2009
6. ## Math

Show work to determine if the relation is even, odd, or neither. f(|x|) = |x|- x^2 + 1 I thought it was even because the absolute value and squared will cancel the negatives, but I don't know how to show this through math..

asked by Anonymous on July 12, 2013
7. ## mat 117/algebra

Find a value for k so the 9m^2-kn^2 will have the factors 3m + 7n and 3m -7n. Please show me how to get this and show the work please. Use that (a-b)(a+b) = a^2 - b^2 So, you can read-off that k = 49.

asked by Diana on June 26, 2007
8. ## intro to algebra

I have a worksheet to do and I have TO SHOW ALL MY WORK: Can you help. If this is the problem 29+n=13 How do I show each step?

asked by justin on December 29, 2010
9. ## Algebra 2 URGENT

Solve the problem. Round answer to the nearest hundredth. Please Show All Work! Suppose a pool has dimensions 12 ft. by 30 ft. A sidewalk of uniform width around the pool has an area of 200 square feet. What is the width of the walkway?

asked by Trisan on November 18, 2009
10. ## algebra

The math club is holding a fundraiser by selling pies. If they sell each pie for \$12, how many pies do they need to sell if they want to make at least \$500? Define a variable, then write and solve an inequality to represent this situation. SHOW YOUR WORK.

asked by math help on December 17, 2018
11. ## Algebra 2

Solve the system. Then classify the system as consistent and independent, consistent and dependent, or inconsistent. 24.) 4x+5y=3 6x+9y=9 26.) 1/2x -3y=10 1/4x +2y=-2

asked by Anonymous on October 15, 2013
12. ## Math (Algebra)

A chemistry student needs to make 60 liters of a 30% alcohol solution. He has a 20% alcohol solution and a 40% alcohol solution in the lab. How many liters of each strength does he need to mix together *The system of equations I did was: a+b=60 &

asked by Amber on November 12, 2016

What is the molality of the solution when you have 48.2 % by mass KBr aqueous solution ? Show each conversion step

asked by Alex on January 23, 2011
14. ## AP Chemistry

What is the molality of the solution when you have 48.2 % by mass KBr aqueous solution ? Show each conversion step.

asked by Alex on January 23, 2011
15. ## math

Use an inequality to solve the problem. Be sure to show the inequality and all of your work. The area of a triangle must be at most 32.5 square inches. The base is 13 inches and the height is x inches. Find the possible values for x.

asked by Anonymous on March 14, 2011
16. ## Math!

I need help figuring out equations for a math problem. This is the question: For a chemistry experiment Marie needs 300 ml of a 15% acid solution. The Science Department has quantities of 5% acid solution and 20% acid solution. What volume of each solution

asked by Temp on December 10, 2018
17. ## math

Formulate a system of equations for the situation below and solve. A theater has a seating capacity of 660 and charges \$2 for children, \$4 for students, and \$6 for adults. At a certain screening with full attendance, there were half as many adults as

asked by Leah on March 28, 2011
18. ## statistics

Four friends decide to buy a bag of 56 gold coins..Each person contribute the following Sue \$320 John \$300 Mike \$220 Betty\$ 160 Please determine the apportionment using a.Hamilton method b.Jefferson method C.Webster method

asked by Mike... on April 24, 2011
19. ## Math

Four friends decide to buy a bag of 56 gold coins..Each person contribute the following Sue \$320 John \$300 Mike \$220 Betty\$ 160 Please determine the apportionment using a.Hamilton method b.Jefferson method C.Webster method

asked by Mike... on April 24, 2011
20. ## arithmetic

Four friends decide to buy a bag of 56 gold coins..Each person contribute the following Sue \$320 John \$300 Mike \$220 Betty\$ 160 Please determine the apportionment using a.Hamilton method b.Jefferson method C.Webster method

asked by MIKE. on April 26, 2011
21. ## Electrophoresis

You need to prepare 400 ml of a 4M glucose solution. It's chemical formula is C6H12O6 and its formula weight (FW) 180.16. Must show all work and calculation and then list what you will mix together to prepare the correct amount of this solution. 180.16 of

asked by Mia on September 26, 2014
22. ## Chemistry

Can you show me the calculation? How many ml of a 2 M solution of HCL would be needed to neutralize 2 ml of a 5 M solution of KOH?

asked by Tia on April 27, 2011
23. ## ALGEBRA Help Please

Decide whether each equation has one solution, no solution or infinitely many solutions 2(x - 3) = 2x 3(y - 3) = 2y - 9 + y 10x - 2 - 6x = 3x - 2 + x 4(x + 3) + 2x = x - 8 Please Show how you did it if possible please thanks! :)

asked by Jeff on November 19, 2014
24. ## chemistry

what is molarity of H2SO4 solution containing .12 moles acid per 75 mL solution? please show math

asked by kaet on November 11, 2009
25. ## college algebra

Using Systems of Equations. Please help!!! I'm not sure what steps to do, to work this problem. #7) Five hundred tickets were sold for a school play, which generated \$3560 in revenue. The prices of the tickets were \$5 for children, \$7 for students, and \$10

asked by Lee on November 22, 2010

Solve the inequality x > 6x - 10 and write a description of the graph. Show all work Subtracting x from both sides does not change the inequality sign direction. 0 > 5x - 10 Add 10 to both sides 5x < 10 Divide both sides by 5. x < 2.

asked by Margie on February 24, 2007
27. ## Algebra 1

I need help to this mathe problems... 1.Elimination using Multiplication x-5y=0 2x-3y=7 Find the value of x in one equation. x = 5y Then substitute that value for x in the second equation. Solve for y, then find the value of x. Insert both values into the

asked by Cristina on May 14, 2007
28. ## calculus

Please help with this question. I have a general solution to a differential equation of 18y^3/2= TOP LINE OF FRACTION is 2(x^2-6x+23)^3/2 and this is divided by 3.plus Constant .I work out constant c to be zero. Is this correct? What is the particular

asked by Tony on May 11, 2011
29. ## Algebra

Could you please check my answers and help with the ones I can't figure out- 1. Solution to the radical function sqrt(12x+1) = 1 is x = 0 True or False I think it is true according to my calculations 2.Solve x = sqrt(8x) 8x = x^2 x^2 - 8x = 0 x(x-8) = 0 x

asked by JayLynne-Please check on October 19, 2010
30. ## Chemistry

Show that the pH of a solution is -0.301 when its hydronium-ion concentration equals 2 M. Is the solution acidic or basic?

asked by Rachael on May 10, 2011
31. ## Pre Calculas

Im really struggling and need help with this 1. One of the tables below contains (x,y) values that were generated by a linear function. Determine which table, and then write the equation of the linear function represented by the Table #1 x 2 5 8 11 14 17

asked by Ryan on October 5, 2015
32. ## math

Can someone help me solve the following....using elimination methods 1) 5x+7y=43 -4x+y=25 2)9x-9y=36 7y-3x=-14 I think the answers are would the answer to number 1 be (-4.26,1.52)? would the answer to number 2 be (-0.5,-6.5)? Can someone please verify or

asked by Holly on March 13, 2010
33. ## Algebra

Solve the equation using the Quadratic Formula 5xsquared+13x-6=0 i think it is -2/5,3 5x^2 + 13x -6 (5x -2)(x +3)=0 You are correct. From Bob Pursley's work you can see that his solution gives +2/5 and not -2/5. The +2/5 is correct. drbob is right on that.

asked by Libby on December 14, 2006
34. ## science

which of the following allows a plant's vascular system to work as a transport system? A. a plant's vascular system is made up of specialized cells that move around the plants as it grows. B. a plant's vascular system is made up of specialized cells that

asked by I NEED HELP FAST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! on May 22, 2014
35. ## SCIENCE

which of the following allows a plant's vascular system to work as a transport system? A. a plant's vascular system is made up of specialized cells that move around the plants as it grows. B. a plant's vascular system is made up of specialized cells that

asked by I NEED HELP FAST! on September 28, 2015
36. ## math

the average of 4 concecutive even integers is 17. find the integers samantha, jason, mary-beth, john, tyrik, aaron, katie, and tiffany -- You would probably get better responses if you show what YOU have done so far to try to solve these problems. Our job

asked by tiffany on November 29, 2006
37. ## 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 15, 2012
38. ## Math

if f is an exponential function, and f(5)=20 and f(9) = 14, use the add-multiply property to calculate f(13),f(17), and f(21). Show your method

asked by Jake on February 19, 2012
39. ## Math

Solving quadratic equations by completing the square. Could you show me every step how to do it. That way I'll know probably know how to do the other ones. With that method you use. 1/2x^2 + x -13 = 0

asked by Basil on October 30, 2009
40. ## Chemistry

What mass of magnesium, Mg, contains the same number of atoms as 12g of Carbon, C Could you please show the method too Thanx :)

asked by Jannie on March 7, 2011
41. ## Physics

After a completely inelastic collision two objects of the same mass and the same initial speed are found to move away together at 1/2 thier initial speed. Find the angle bewteen the initial velocitie of the objects? Can you please show me the step to solve

asked by Tammy on March 5, 2007
42. ## chemistry

For the determination of the quantity of chloride in a physiological serum sample by the Volhard method, a sample of 25.00 ml was treated with 50.00 ml of 0.110 mol/L Silver nitrate solution and the excess of silver ions was titrated with 17.00 ml of a

asked by william on October 4, 2017
43. ## Chemistry

How do I solve these problems You have 2000. g of aqueous NaOH solution. The percent by mass of the solute is 4.25%. How many grams of NaOH are in the solution? If you have 100.0 mL of a 25.0% aqueous solution of ethanol, what volumes of ethanol and water

asked by Lucy on October 4, 2014
44. ## pre-calculus

solve the exponential equation. express the solution in terms of natural logarithims. Then, use a calculator to obtain a decimal point approximation for the solution. e^x=12.3 What is the solution in terms of natural logarithims? The solution set is ?

asked by ladybug on October 6, 2012
45. ## natural science

usingbisection method and fp,evaluat the solution set of x3-4x-9

asked by ayele on November 3, 2015
46. ## Math/Biz Math

I am so lost. Did I answer these problems right? Bud Ray is the owner of an automatic car wash located in a busy side of town. He currently has all the business he can handle and then some. His business has grown steadily over the years. His current car

asked by Jose on November 9, 2009
47. ## Java Help

I am just starting out in programming. If someone could help me with these assignments, it would be greatly appreciated. "Write a Rectangle class. This class represents Rectangles. Each Rectange has the X and Y coordinates of its center point (as doubles)

asked by Jim on May 21, 2008
48. ## algebra

2. The equation relates the radius r of a drainpipe in inches to the flow rate F of water passing through it in gallons per minute. a. Find the radius of a pipe that can carry 600 gallons of water per minute. Round to the nearest tenth. (Let ) b. Solve the

asked by stephanie on July 11, 2011
49. ## Algebra

Can you please help me with this problem: The x-intercept of a line has a value of -7/6 and a y-intercept of 7. Another line has a slope that is twice the slope of the first line an a y-intercept that is 15 more than the first lines' y-intercept. What is

asked by Chris on December 10, 2016
50. ## calculus too hard

the velocity of a chemical reaction is given by dx/dx=k(a-x) where x is the amount transfered in time t,k is a constant and a is the condition at time t=0 when c=0 solve the equation and determine x in terms of t? Plz show work plz plz

asked by ... on December 26, 2016
51. ## 7th Grade Math

Write one or two equations to represent the situation below. Solve the equation(s). Show all your work. Two cars leave town going in opposite directions. The car heading north travels at 55 mph. The car heading south travels at 75 mph. How long will it

asked by Danny on November 7, 2006
52. ## Chemistry

Assignment  Calculate the pH, pOH, [H+], and [OH] for each of the following solutions. Show all work. (10 Points) Solution Composition of Starting Materials 1 0.10 M acetic acid 2. 5 mL 0.10 M acetic acid + 5 mL wa 3 1 mL 0.10 M acetic acid + 99 mL

asked by Brian on October 11, 2010
53. ## Chem

The mass of a beaker is 5.333g. After 5.00 mL of a concentrated hydrochloric acid solution is pipetted into the beaker, the combined mass of the beaker and the hydrochloric acid sample is 11.229 g. From the data, what is the measured density of the

asked by Amy on September 1, 2015
54. ## maths

find the general solution of the following first order differential equation. t*(dy/dt) = (-y/t) + ((exp(1/t)/t^3) could you show steps in working to solution.

asked by ricky on October 26, 2011
55. ## Physics 102 (College)

I'm stuck on part B of this question: A system does 125 J of work on environment and gains 79 J of heat in the process. Find change in internal energy (delta U, abbreviated dU)of a. the system and b. the environment. A. Find dU of the system W = 125 J Q =

asked by Carla on February 27, 2011
56. ## Physics 102 (College)

I'm stuck on part B of this question: A system does 125 J of work on environment and gains 79 J of heat in the process. Find change in internal energy (delta U, abbreviated dU)of a. the system and b. the environment. A. Find dU of the system W = 125 J Q =

asked by Carla on February 27, 2011
57. ## Calculus

Consider the function f(x) e^x-1/2x^2. Find all points of inflection if they exist. Please show sign graph and show work in detail so I can follow for future reference. Thanks.

asked by Rene on April 20, 2013
58. ## Calculus

Find the area between the graph of f(x)= x(e^-x^2) and the x-axis for the interval (0, ∞). Your work must include the proper notation and show the antiderivative. If the integral diverges, show why.

asked by Alice on April 23, 2019
59. ## algebra

(1) Is the equation true false or open? 9p + 8 = 10p + 7 A. open;there is a variable ***** B. true;the expressions are all the same for all values of the variiables C. false;the expressions are never the same (12) Which equation is an identity? A. 11 - (2v

asked by kelseypooh on October 10, 2018
60. ## math

(1) Is the equation true false or open? 9p + 8 = 10p + 7 A. open;there is a variable ***** B. true;the expressions are all the same for all values of the variiables C. false;the expressions are never the same (12) Which equation is an identity? A. 11 - (2v

asked by kelseypooh on October 10, 2018

please check my answer thanks :) I messed up somewhere.:( Using the FIFO method of inventory pricing, what is the dollaor value of ending inventory if there were 17,000 units on hand on Dec 31 Must show all of work Jan 1 5,ooo @ \$0.89 = 4450 Feb 15 10,000

asked by keleb on January 8, 2008
62. ## math

Hello, Here is a question with something i've never heard of. These are the first two stages of a fractal known as the Sierpinski carpet. The carpet begins with a square (stage 1). The square is cut into 9 congruent squares and the middle square is removed

asked by JOE on February 10, 2010
63. ## math/algebra

solve each of the following systems by substitution. 16) 5x -2y = -5 y - 5x = 3 20) 8x -4y = 16 y = 2x - 4 28) 4x -12y = 5 -x + 3y = -1 Step one: Solve on of the equations for one of the variables. y=2x-4 Step two:Substitute the expression for the variable

asked by Diana on June 7, 2007
64. ## Algebra

I can't seem to solve this for x correctly...I got 128 over 55 as an answer which can't be correct. Please help me find the correct answer! Thanks! The equation is: .05x-.6(x+2)=.08 Please show the work as well as the answer. Thanks again.

asked by Clare on October 12, 2011
65. ## Math

i) Predict whether the functions in each pair are equivalent by testing three different values of x. (3 marks each - show your work) ii) Determine whether the functions in each pair are equivalent by simplifying the expression on the right side. (2 marks

asked by Alex on January 9, 2015
66. ## Math

i) Predict whether the functions in each pair are equivalent by testing three different values of x. (3 marks each - show your work) ii) Determine whether the functions in each pair are equivalent by simplifying the expression on the right side. (2 marks

asked by Alex on January 8, 2015
67. ## math

Please help solve the below problem Show work please! Thanks. On Dec 28,2007,you could buy a 10-year U.S.Treasury note(a kind of bond)for \$10,000 that pays 4.21% simple interet every year through Dec 28,2017.How much total interest would it earn by then?

asked by MIKE. on April 14, 2011
68. ## Chemistry

A solution contains 0.010 M BaCl2. Calculate the molarity of the ions in solution, the ionic strength of the solution, the activity coefficient of the barium ion and its activity. Repeat for the chloride ion. Show all calculations please.

asked by sea lively on August 2, 2018
69. ## drwls, is this correct,math

drawls this is from the previous post is this correct. solve the system by subtraction. 5x-3y=13 4x-3y=11 equation#2 woudl be 4x-3y=11 -3y = -4x+11 y = (4)/(3) x - (11)/(3) so now i substitute it to equation #1 5x - 3((4)/(3)x - (11)/(3)= 13 5x - 4 x +11 =

asked by jasmine20 on February 13, 2007
70. ## math

Twenty-four less than three times x is equal to the product of five and x.Find x.solve show steps to solve

asked by Anonymous on December 5, 2012
71. ## math

solve for unknown: log9 r=3/2 logG 2=1/3 Can you show me the steps how to solve this problems.Thank yo very much for your time

asked by sandy on July 18, 2010
72. ## Differential Equations

x dy/dx + y = 1/y^2, solve using bernoulli's equation. i got to du/dx + (2u)/x = 2x(u)^(-1/2). the u^(-1/2) is obviously a problem if im going to solve it using an integrating factor. if that is not what you yourself have gotten to then please show me my

asked by Bryant on September 25, 2012
73. ## Algebra

Solve. Please show all of your work. The sum of twice a number and 4 less than the number is the same as the difference between -32 and the number. What is the number?

asked by Darlene on July 29, 2012
74. ## math/calculus

solve the equation loga(x-5)- loga (x+9)=loga(x-7)-loga(x+9) all a's are lower please show work

asked by Roger on January 7, 2013
75. ## Math

All numbers in our real number system are the product of prime numbers. Complete the following steps for this discussion: 1. 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

asked by Tammy on March 28, 2013
76. ## values for k, math,help

can someone show me the steps to work out this problem that is diving me nuts.. Directions: Find all positive values for k for which each of the following can be factored. x^2+x-k I am completely cluelis towards this problem....i've tried it many different

asked by jas20 on February 25, 2007
77. ## Math

I need to show how to solve this: Question - 50.50/ 0.5 The calculator shows the answer 101.00 Can you tell me how to solve it?

asked by Cindy on September 29, 2008
78. ## Math

One more question. Can you please show the steps of how to solve this. I feel like the way I'm solving this is wrong. Solve for x y and z X+5y+3z=7 2x+y+4z=1 2x-y+2z=1

asked by Unknown on October 1, 2017
79. ## Math

Last year, the personal best high jumps of track athletes in a nearby state were normally distributed with a mean of 229 cm and a standard deviation of 19 cm. What is the probability that a randomly selected high jumper has a person best between 229 and

asked by Gia on May 24, 2012
80. ## Math

Solve the equation by the substition method. x-y=11 3x+10y=-6?

81. ## Math

Solve the sytem of equations using the addition method. 5x+2y=1, x-3y=7

asked by Greg on January 28, 2016
82. ## algebra

Solve by the linear combination method (with or without multiplication). 3x-5y = 7 2x + 3y = 30

asked by geddy on December 16, 2010
83. ## Math

Use the common denominator method to solve 3/5 divided by 2/3

asked by Kara on October 9, 2009
84. ## algebra

Solve by the linear combination method (with or without multiplication). 6x \-2y = 2 3x + 4y =-5

asked by geddy on December 16, 2010
85. ## algebra 1

how do you solve the following questions using the substitution method? -3x-y=3 3x+6y=48 -3x-5y=-21 -5x+6y=32 2x+4y=12 4x+16y=8

asked by no one needs to know on July 1, 2010

Solve this pair of equations by the graphical method: 4x+y=9 , 3y-2y=49

asked by Jeconiah on August 26, 2012
87. ## Math

Solve the equation by the substition method. x-y=11 3x+10y=-6?

Solve this pair of equations by the graphical method: 4x+y=9 , 3y-2y=49

asked by Jeconiah on August 26, 2012
89. ## math

solve by substitution method. 5x + 6y =5 x = 40 -9y first I rewrite to y=mx+b I get: 6y=5x+5 -9y= x +40 after that I am lost..... can someone please help me??

asked by Amanda on November 11, 2009
90. ## algebra 1

Solve by the linear combination method (with or without multiplication). 6x – 2y = 2 –3x + 4y = 5

asked by Anonymous on May 7, 2012
91. ## Math

Solve the equation (3x+1)^2=16 by the Square Root Method.

asked by KyLee on November 1, 2018
92. ## math-algebra

how do i solve this using the substitution method 3x+2y=7 2x-3y=-4 x=7-2y/3 2(7-2y/3)-3y=-4 this is where i get stuck help would be much apprieciated

asked by peter on November 14, 2010
93. ## algebra

Solve by the linear combination method (with or without multiplication). 4x-5y =-18 3x + 2y =-2

asked by geddy on December 16, 2010
94. ## MATHS

SOLVE THIS SIMULTANEOUS EQUATION USING SUBSTITUTION METHOD 3X+Y=11 AND 2X-Y=4

asked by DARLINGTON on February 2, 2016
95. ## math-matrix

solve using the gauss-jordan method. x-2y+4z=7 -x+3y-z=-1 2x+y=-2 *I get through the first two columbs, but can't get the third one to the one and zero.

asked by Veronica on February 29, 2012
96. ## Math

Solve the simultaneous equation P^2-Q^2=40 Q+P=10 Using the substitution method

asked by Zulaiykherh on January 3, 2017
97. ## physics

easy method to solve questions on ap,gp,agp?????????????????????

asked by nik on September 27, 2008
98. ## maths

2x-y+3z=9,x+y+z=6x-y+z=2 solve equation on matrix inversion method

asked by matrix on October 2, 2016
99. ## math

solve -15x-2y=-31 4x+6y= 11 using linear combination method?

asked by Anonymous on September 22, 2008
100. ## Suhaib

Solve x^n by abinitio method check ur ability nw?

asked by Anonymous on July 4, 2015