# 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 68
1. ## Math

Simplify each expression and state any non-permissible values. ( 3 marks - show your work) x/x^2-3x-4 - 4/x+1

asked by Alex on January 8, 2015
2. ## Algebra I

Could someone please help with these problems? 4x squared-5x + 3 if is a.3 b. 0.3 Please show me the work invovled on getting the answer, my teacher requests it. Thank you.

asked by Jillian on August 21, 2008
3. ## Algebra

I also needed help with this problem to: 8 divided by 4 times 2 - 7 + 3 Again could you please show me the work involved in getting the answer. Thank you.

asked by Jillian on August 21, 2008
4. ## math

calculate the following, leaving your answer as a fraction (lowest) or in decimal. Show your work 8(2+3² --------- 2(5)²

asked by ios7 on September 18, 2013
5. ## Math

Simplify each expression and state any non-permissible values. ( 3 marks - show your work) x/(x^2-3x-4)-4/(x+1) Please help me!

asked by Alex on January 8, 2015
6. ## socials

How has Britain’s political system impacted Canada’s political system (e.g., how, to a great extent, it’s modelled on it in the type of government we have, legal system, etc.)? Make sure to also include the influence of the English Bill of Rights and

asked by mmmmm on September 23, 2015
7. ## linear algebra

The reduced row-echelon form of the augmented matrix for a system of linear equations with variables x1, ... , x5 is given below. Determine the solutions for the system and enter them below. 1 0 0 -3 -3 = 4 0 1 0 -2 -5 =-1 0 0 0 0 0 = 0 If the system has

asked by sal on October 7, 2018
8. ## Math

Group member - Time take Juan. 32.35 Ricardo. 21.78 Lucas. 23.18 Calculate u sing the work model. Using the individual times for your three team members, write an equation to model the work done, and solve that equation for the estimated time that it takes

asked by Patrisia on November 18, 2015

XeO3 + I- ----> Xe + I2 (acidic solution) CN)2 -----> CN- + OCN- (basic solution) MnO2 + SO32- ---> Mn2+ + S2O62- (acidic solution) H2SeO3 + H2S -----> S + Se (acidic solution) Cl2 ---> Cl- + ClO3- (basic solution) ClNO2 -----> NO3- + Cl- (acidic solution)

asked by Brittney on October 27, 2013
10. ## Physics - drwls?

A small block of mass m = 4.0 kg can slide along the frictionless loop-the-loop. The block is released from rest at point P, at height h = 23R above the bottom of the loop (R is the radius of the loop). Express your answers in the form ngR, where n is the

asked by winterWX on March 19, 2007
11. ## Math

if 2m + n= 7, then 9m+3n= i tried using elimination for this one too. I tried to find m m= 7-n/2 Then i plugged it into the first equation. and somehow i got 7=7 ??? CAN SOMEONE PLEASE EXPLAIN

asked by Confusedperson on July 19, 2017
12. ## algerbra

4x+4y=56 3x-16y=-91 slove by using systems of elimination multiply

asked by miranda on December 22, 2010

dy/dx= (y^2 -1)/x 1. Give the general equation of the curves that satisfy this equation. 2. Show that the straight lines y=1 and y=-1 are also solutions 3. Do any of the curves you found in 1) intersect y=1? My Ans: 1. The general solution i found out to

asked by Hebe on November 7, 2006
14. ## Stastics

The UMUC bookstore states the average textbook costs \$119. A randomly selected sample of 26 new textbooks at the UMUC bookstore had a mean price of \$123.45 and sample standard deviation of \$15.23. Use a 0.05 significance level to test the claim that the

asked by Nick on April 26, 2016
15. ## Chemistry

What is the equilibrium equations that result when solid NH4F is dissolved in sufficient water to produce 5.0 mL of 0.5M NH4F solution? How would the addition of 5 drops of 0.1M HCl affect the equilibrium system. Give an explanation. How would the addition

asked by Megan on March 20, 2012
16. ## Genetics

Hi can anyone help me answer these questions? I think I may have the right answer but not too sure, just want to make sure. And also could you please show how to draw these as I'm not sure my drawing is not done correctly. Thankyou! Using the forked-line

asked by GenMan on January 30, 2008
17. ## Science

If I want to make a solution that has a 5% concentration of salt, is it correct for me to have 380mL water and 20g salt? My method behind this was that I wanted a 400g solution, and so since 1mL water is equal to 1g water, I did: 400x0.95=380g water or

asked by Anonymous on February 6, 2011
18. ## Physics

How is work affected when an object is lifted straight up instead of using a ramp? Work will increase. Work will decrease. Work will stay the same. Work will depend on the mass of the object.

asked by Willowmaker on January 29, 2019
19. ## Chemistry

The specific heat of a solution is X J/g*degreesC and its density is Y g/mL. The solution was formed by combining Z mL of solution A with Z mL of solution B, with each solution initially at J degreesC. The final temperature of the combined solutions is D.

asked by Fred on April 2, 2010
20. ## math

Solve the following equation -5x + 1 > 11 Please include work

asked by tom on January 3, 2009
21. ## chemistry

After your explanation I try to solve it, so would you please check my work again. Thank you! a)

asked by wendy on April 8, 2007
22. ## Math

How do u solve 15/y=3. I know the answer is 5 but how do u get there by showing your work?

asked by Karen on August 23, 2012
23. ## 7th grade math

input 1 2 3 4 5 6 7 output1 8 27 please solve this and work it out.

asked by Melea on August 20, 2010
24. ## Compound Inequalities

Solve. 5 < x - 2 < 11 a. 5 < x < 11 b. 7 < x < 13 c. 7 < x < 11 d. 5 < x < 16 My answer is b. Can you check my work?

asked by not+really on October 20, 2017
25. ## math

What equation do you get when you solve v-m = v+nx for x How did you work this problem?

asked by Jane on April 12, 2012
26. ## Calculus

Solve the integral: ∫ x^3/(x^+2)^2 I'm stuck. This is my work so far. ∫ A/(x^+2) + ∫ B/(x^2-2)^2 F(x)=A ln(x^2+2)-B/(x^2+2)+C X^3=A(x^2+2)+B

asked by Mike on October 10, 2018
27. ## Discrete Math: Applications of Dot Product

A 35-kg trunk is dragged 10m up a ramp inclined at an angle of 12 degrees to the horizontal by a force of 90 N applied at an angle of 20 degrees to the ramp. At the top of the ramp, the trunk is dragged horizontally another 15m by the same force. Find the

asked by Anonymous on February 23, 2008
28. ## College Chemistry

You have combined 1.218 moles of calcium ions and 0.943 moles of lithium ions in enough solvent to make 500.00mL of solution. What is the mole fraction of lithium ions in this solution? What type of problem is this and how do I set it up to solve?

asked by Jacob on June 5, 2017
29. ## Grammar

Circle the nouns that can be used with the verbs on the right . Engine-consumption-dependence (reduce) Solution-dependence-alternative (find) Resources-technology-stocks(deplete) Quantity-problems-question(solve) Energy-crisis-shortage (face)

asked by Maryam on June 3, 2013
30. ## physics

A helicopter flies to the right (in the +x direction) at a constant speed of 14 m/s, parallel to the surface of the ocean. A 1200 kg package of supplies is suspended below the helicopter by a cable as shown in the figure: the package is also traveling to

asked by Jonas on September 27, 2018
31. ## physics

An obnoxious brat assigns his 0.0221-kilogram pet mouse Mickey the role of stunt mouse by stuffing him into a spring gun and shooting him up into the air at some angle. During the launch process the spring transfers 0.707 J of energy into the \'mouse Earth

asked by James on December 3, 2013
32. ## physics

An obnoxious brat assigns his 0.0221-kilogram pet mouse Mickey the role of stunt mouse by stuffing him into a spring gun and shooting him up into the air at some angle. During the launch process the spring transfers 0.707 J of energy into the \'mouse Earth

asked by James on December 3, 2013
33. ## Math Investigations II

For what value of k will the system be dependent? x+3y+2z=-4 3x+4y-z=2 3x-y-8z=k I'm confused as to what exactly it's asking for by a dependent system. I know this is a system with infinite solutions, but I don't know how to find that in 3 dimensions.

asked by Cody on October 22, 2011
34. ## GDP

I was trying to calculate the GDP using the income method, but I don't know what to do with the inputs purchased etc. Here are the data: Agriculture: Total sales --- \$50 Capital goods Purchased --- \$40 Manufacturing inputs --- \$30 Wages --- \$20 Operating

asked by Talisha on August 8, 2012

Solve (x+17)(x-20)(x+8)>0 The solution set is (x )? Use at least one inequality or compound inequality to express your answer. For answers with more than one inequality, separate the inequalities by a comma or the word 'or'. Type R is the answer is all

asked by Becky on March 21, 2008
36. ## maths

sir steve plz am a little confuse (x-y)³=A(x+y) prove that (2x+y)dy/dx=x+2y if y is a function of x and x=e^t/(e^t+1) show that dy/dt=x(1-x)dy/dx plz explain to me very well sir damon answered that but i still dont get it If u want me to show my work i

asked by practising and need help on November 12, 2016
37. ## ALGEBRA WORD PROBLEM! HELP!

And if a length of a rectangle is 3 more than twice the width and the are is 90 cm squared than what are the dimensions of the rectangle? The width of the rectangle is 43.5 and the length of the rectangle is 87. All together when you add it up it will make

asked by Judy on January 23, 2007
38. ## stats

The Ledd Pipe Company has received a large shipment of pipes, and a quality control inspector wishes to estimate the average diameter of these pipes. A random sample of 18 pipes produces an average diameter of 2.56 mm with a standard deviation of 0.05 mm.

asked by johnny on November 27, 2012
39. ## Chemistry

A 100 milliliter sample of 0.100-molar NH4Cl solution was added to 80 milliliters of a 0.200-molar solution of NH3. The value of Kb for ammonia is 1.79 x 10^-5. (a) What is the value of pKb for ammonia? (b) What is the pH of the solution described in the

asked by Nicole on April 26, 2010
40. ## Chemistry

A 100 milliliter sample of 0.100-molar NH4Cl solution was added to 80 milliliters of a 0.200-molar solution of NH3. The value of Kb for ammonia is 1.79 x 10^-5. (a) What is the value of pKb for ammonia? (b) What is the pH of the solution described in the

asked by Nicole on April 26, 2010
41. ## Banking & Money

Couple questions here... "Under fixed exchange rates," A. The Free Market is the major determinant of the exchange rate. B. Official government transactions maintained the agreed-upon exchange rate by buying and selling foreign exchange. C. The balance of

asked by Bobby on December 6, 2009
42. ## physics

A diagram shows two cylinders containing two pistonsA and B. The two cylinders are connected with a tube containing a fluid. The system is similar to the hydraulic braking system of a car. A man pushes down on piston A while piston B has a 10kg mass

asked by Haiano on April 26, 2014
43. ## College Physic

can someone help me with this question? Thank you! You have taken a summer job at a warehouse and have designed a method to help get heavy packages up a 15º ramp. In your system a package is attached to a rope, which runs parallel to the ramp and over a

asked by Monet Nguyen on September 30, 2012
44. ## Calc AB

I've been trying to solve this problem for the past 45 minutes and could really use some help. I'm given that water flows into a tank at a rate of (5t+4) gallons/min. Water flows out of the tank at a rate of 0.5(t^2) gallons/min. At t=0 min the tank

asked by Mari-Anne on March 21, 2017
45. ## math,correction

can you check if how i solved it to show that my answer is no is correct. Is -4 a solution to the equation 7x-5+3x=6+x-10 This is what i did: 7(-4)-5+3(-4)=6+(-4)-10 -28-5-12=2-10 -45=-8 so the answer is no -4 is not the solution to the equation. Yes this

asked by jasmine20 on February 13, 2007
46. ## Physics

Right now in physics we are learning about electric potential energy and electric potential. My question is: P and Q are points within a uniform electric field that are separated by a distance of 0.1 m. The potential difference between P and Q is 50 V. How

asked by Jeff on January 9, 2015
47. ## criminal justice

need help with writing final paper. Pick a country (outside of the United States) and research its correctional system. „h Write a 1,050- to 1,400-word paper in APA format comparing the American correctional system with that of a foreign country. o

asked by missy on September 24, 2009
48. ## Chemistry

How would you prepare 455 g of aqueous solution that is 6.50% sodium sulfate Na2SO4 by mass? percent by mass = grams/100 g solution. X grams/455 = 0.065 solve for X. Subtract 455-X to calculate how much water must be added. ok i got -454.935 is this right

asked by Lauren on February 6, 2008
49. ## pre-algebra

Mrs. Boyd went shopping at city center Mall. she parked her car in the parking garage. The cost for parking was \$1.00 for the first hour and \$0.75 for each additional 1/2 hour. Mrs. Boyd paid \$4.75 for parking. Write an equation to find how long Mrs. Boyd

asked by Dj on March 14, 2008
50. ## Maths (money and finance)

The cash price for the Teledex Component System with a dvd is 1999.95 .If you buy the system on hire purchase you must pay a deposit of 200.00 and an instalment of 91.00 per month for 24 months Calculate: (a)The total amount you would pay for the system on

asked by Jenny on June 21, 2018
51. ## HR

Managers and economists traditionally have seen HRM as a(n) A. source of value to their organization. B. necessary expense. C. asset. D. essential component of a high-performance work system. D

asked by Babybear on June 17, 2018
52. ## Physics

Calculate the work done on the system when 1.00 mol of gas held behind a piston expands irriversibly from a volume of 10.0dm^3 against an external pressure of 1.00 bar?

asked by Andrew on March 23, 2015
53. ## Chemistry

A solution is prepared by dissolving 0.1 mol of ethanoic acid (CH3COOH) in 500ml of water at 25 C. pKa of ethanoic acid is 4.7. What is the pH of the solution? I'm assuming the equation is pH = pKa + log[Base]/[Acid] but can't get it to work?

asked by Becca on October 21, 2015
54. ## chemestry

Balance th following equation in acid Solutiong and determind if it is spontaneous under standard conditions. NO3^-1 + Sn^+2 ---> NO + Sn^+4 balanced directed to first post. You need to calculate the E value to determine if it is spontaneous or not. Please

asked by bik on May 16, 2007
55. ## Chemistry

A is a solution of trioxonitrate (V) acid. HNO of unknown concentration B is standard solution of sodium hydroxide containing 4.00g per dm3 of solution 25cm3 portion solution B required an average of 24.00cm3 of solution A for neutralization. Using 2 drop

asked by EMMANUEL on June 6, 2018
56. ## math

Show you solution. List the terms that complete a possible pattern in each of the following: a)38,33,28,23,18,_,_,_ b)640,320,160,80,_,_,_ c)7,8,15,23,38,_,_,_

asked by Anonymous on September 24, 2010
57. ## it

Can someone please help me with this. I need some understanding on how to 4] Use IPO for analysis  Use Pseudo Code to show your design solution. I am not sure how to do this or how or what to do. Please help me better understand this. Please

asked by Anonymous on May 16, 2008
58. ## maths

find the general solution of the following first order differential equation. u(t): du/dt = u /t+2t pls show all working

asked by Zane on October 26, 2011
59. ## mathematics

find the general solution of the following first order differential equation. u(t): du/dt =(u/(t+2t)) pls show all working

asked by Zane on October 26, 2011
60. ## Chemistry

calculate the mass of silver nitrate present in 10mL of a 0.5M solution. will someone show me how to do this because i have no idea :(

asked by Tabatha on December 7, 2011
61. ## math

What is the area of the region bounded by the x-axis and the lines x+y=24 and 3x-2y=12? Please show full solution and explanation

asked by K on December 19, 2017
62. ## algebra

Show a complete algebraic solution for the following: find 4 consecutive multiples of 11 with the sum of 2178

asked by Anna on February 17, 2010
63. ## chem

If 1.0 L of 0.2 M Ca(OH)2 is added to 2.5 L of 0.1 M HCl, the pH of the final solution is? can someone show me the working out of this question? im very confused by it. thankyou

asked by an on August 18, 2011

A telephone conversation may not be as acceptable a method for conveying information as a written document because a telephone may: a. be unavailable when you need to make the call. b. not be convenient for the receiver. c. not provide a confidential

asked by Anonymous on May 2, 2012
65. ## Calculus

A man 5.5 ft tall walks away from a lamp post 10 ft high at the rate of 8 ft/s. (a) How fast does his shadow lengthen? (b) How fast does the tip of the shadow move? Can you please tell me what method/s you used to come up with a solution? I wasn't sure

asked by Jean on August 12, 2015
66. ## Physics

Two masses, m1 = 25.0 kg and m2 = 45.0 kg, are attached by a massless rope over a massless pulley as shown above?The angle of the frictionless incline is 27.0 degrees . Assume that m2 starts at rest and falls a vertical distance of 3.00 m. Assume m1 also

asked by polly on October 10, 2014
67. ## Math 8th Grade

I would greatly appreciate it if someone would please be kind enough to take the time and show me how to work these problems. Thank you very much Solve by finding y and graph using the slope and y-intercept: 3x-y=1(My answer -y=3x+1)which is wrong could

68. ## check over--

this is a book review for 9th grade honors english. does it look OK? are there any errors or anything? thanks-- The novel Dairy Queen by Catherine Murdock is the story of 15-year-old D.J. Schwenk who lives in Red Bend Wisconsin. Her father gets injured and

asked by Anonymous on May 29, 2008
69. ## Chemistry re-post

I took a look at this question to see if I copied it correctly, and it does NOT say how much of the solution was used. It does use mols as the unit. Dr. Bob, I am not sure what you mean by "decays into Argon." I realize that the 38 CL decays to Argon, but

asked by Nancy on July 23, 2013
70. ## chemistry

ho do you calculate final temperature? anyone please help thanks that's a little vague. Are you dealing with ideal gases? If so you would use the formula PV=nRT P = pressure V = volume of container n = moles (grams/molar mass) R = gas constant (0.0821) T =

asked by shannon on March 15, 2007
71. ## Physics

PLEASE SHOW ALL WORK A 15.0-kg cart is moving with a velocity of 7.10 m/s down a level hallway. A constant force of -5.0 N acts on the cart and its velocity becomes 3.00 m/s. (a) What is the change in kinetic energy of the cart? (b) How much work was done

asked by johnny on May 10, 2011
72. ## Chemistry

What is the molarity of the final solution of 2.00mL of the 5.00M stock solution is diluted to 10.00mL to make solution A. Solution A undergoes a second dilution by taking 3.00mL solution A and diluting it to 25mL? I'm so confused by this. Please help.

asked by jamie on November 10, 2016
73. ## statistics

Suppose that each unit of a system is up with probability 2/3 and down with probability 1/3. Different units are independent. For each one of the systems shown below, calculate the probability that the whole system is up (that is, that there exists a path

asked by sam on February 17, 2014
74. ## Biology

20. One difference between a gastrovascular cavity and a one-way digestive system is the presence or absence of a. cell specialization b. digestive enzymes c. digestion within body cells d. a moist membrane for nutrient diffusion A? 21. In an open

asked by mysterychicken on March 4, 2010
75. ## Biology

20. One difference between a gastrovascular cavity and a one-way digestive system is the presence or absence of a. cell specialization b. digestive enzymes c. digestion within body cells d. a moist membrane for nutrient diffusion A? 21. In an open

asked by mysterychicken on March 4, 2010
76. ## Chemistry

A volume of 60.0 of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the KOH solution if 25.2 mL of 1.50M H2SO4 was needed? The equation is 2KOH+H2SO4-->K2SO4+2H2O. I cant seem to

asked by Paris on June 25, 2011
77. ## MATH

Solution A is 25% and solution B is 40% acid. How many gallons of each solution must be used in order to create a 50 gallon mixture that is 34% acid? Solution A___ Solution B___

asked by Diane on October 12, 2011
78. ## math

Julia is a chemistry student. She is working on an experiment for which she needs 10 liters of a 20% salt solution. All she has in her lab are a 10% salt solution and a 40% salt solution. She decides to mix these to make her own 20% solution. How much of

asked by Anonymous on April 3, 2018
79. ## 4th grade challenging math questions

a pioneer family plans to build a barn.they will need 12 large support posts along each side wall and 8 posts along both the front and back walls.they can cut the two posts from each tree that they chop down.How many trees should they chop down?How did you

asked by Celest on March 1, 2012
80. ## HELP!!!!

a pioneer family plans to build a barn.they will need 12 large support posts along each side wall and 8 posts along both the front and back walls.they can cut the two posts from each tree that they chop down.How many trees should they chop down?How did you

asked by Celest on March 1, 2012
81. ## math 1324

a natural history museum borrowed \$2,000,000 at simple annual interest to purchase new exhibits. Some of the money was borowed at 7%, some at 8.5%, and some at 9.5%. Use a system of linear equations to determine how much was borrowed at each rate if the

asked by Anonymous on May 3, 2016

I would appreciate very much If you guys could show me how to approach this problem. A solution is prepared by dissolving 10.8g of ammonium sulfate in enough water to make 100.0mL of stock solution. A 10.00mL sample of this stock solution is added to

asked by claudia on September 23, 2007
83. ## Math

Question 2 For the function f(x) = 3x2-2x-7, find f(2). Answer f(2) = 13 f(2) = 25 f(2) = 1 f(2) = 1/2 3 points Question 3 One day you work 3 hours and your boss gives you \$22. Another day after working 4 hours your boss gives you \$33. Yesterday after

asked by adam on May 18, 2012
84. ## algebra

Please show solution to this problem. In triangle A, the longer leg is 6 more than the shorter leg and the hypotenuse is 6 more than the longer leg. Find the lengths of each side of this right triangle. Show all calculations. Short leg = _______ Long leg =

asked by Anneliese on January 23, 2017
85. ## Chemistry

A 10g sample of aniline hyrdochloride is dissolved in 250 mL of solution. C6H5NH2-HCl(s) => C6H5NH3+ (aq)+ Cl-(aq) H2O is shown over the arrow. What is the pH of the solution? You have added a salt to water. The pH will be determined by the (H^+) of the

asked by Brittany on April 30, 2007
86. ## science( chem)

For literature citation at the end of a lab report if only the text is used would that have to be cited as well? Or would it not be cited and on the page for literature citation I would type no sources cited? You have to cite anything and everything that

asked by christina on July 20, 2007
87. ## Math (urgent)

the equation x^2+y^=25 describes a circle with center at the origin and radius 5. The line y=x-1 passes through the circle. Using the substitution method, find the points at which the circle and line intersect. a) (4,3) and (-4,-3) b) (3,4) and (-3,-4) c)

asked by Max on September 7, 2016
88. ## English

Identify the most effective method by which a writer can persuade a reader. A.S/he repeats the same idea over and over, using different words. B.S/he tries to use information that could frighten a reader. C.S/he supports main points with strong research.

asked by Tim on February 11, 2017
89. ## math

Suppose you have a \$1,000 charge on a credit card charging 1.5% monthly interest using the adjusted balance method. The minimum payment due in May is \$30. How much will you save in interest charges in June by paying \$60 instead? \$ 1 .Viewing Saved Work

asked by Anonymous on August 20, 2012
90. ## Basic Algebra

solve the equation & check your solution: 2/5x-9/25x=5

asked by Catherine on July 9, 2011
91. ## Math

Solve the inquality and describe the solution set. y - 6 ≥ 12

asked by Mystery Girl on February 24, 2016
92. ## math

Solve the equations by finding the exact solution. 4 = x − 4

asked by leelee kay on June 3, 2014
93. ## math

solve the absolute value equation |3a+8|=|4a-4| the solution set is

asked by Anonymous on September 23, 2010
94. ## mat 116

solve for x using the addition principle. x + 6 = -8 What is the solution for x? Thanks kindly

asked by cindy on November 8, 2010
95. ## algebra

Solve the inequality. Graph the solution set. 5r+4

asked by Kandy on September 2, 2014
96. ## Algebra 2

what is the positive solution of the equation 5x^2 + 2x -16 =0? solve by factoring.

asked by Zach on December 8, 2014
97. ## Algebra

Solve the compound inequality. Graph the solution. -6

asked by |-/ on January 10, 2018
98. ## alg

solve and check solution 12x=11x-5

asked by jerson on October 12, 2009
99. ## Math

Solve the inequality and describe the solution set. y-6>12 - Is it y – 6 ≥ 12 y – 6 ≥ 12

asked by Sliverstream on May 17, 2019
100. ## geometry

proportions i'm struggling on this problem x over x+8= x- 5 over x could someone please help me solve the solution

asked by Anonymous on January 5, 2010