# 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 88
1. ## Technology

ok..so i have these labs in technology. and i'm on the first one. here's how it goes: ACTIVITY 1A-DESIGN PROBLEM Background: Technology is the application of knowledge to create machines, materials, or systems to help us make work esasiers, to make life

asked by y912f on October 28, 2009
2. ## Math

Hi, Could you please show me a step by step worked solution to this question? Factorise: 6p^2 - 17pq + 12pq^2 I am getting confused as what to do when there are two "squares". the answer should be "(2p- 3q)(3p -4q)" Thank you very much!!!

asked by Mez on February 5, 2014
3. ## maths

Q1). If the zeroes of he polynomial f(x)=ax^3+3bx^2+3cx+d are in A.P then show that 2b^3 -3abc +a^2d=0 (detailed solution .....) Q2)if alpha, beta, gamma are the roots of equation x^3-3x+11=0 then find the equation whose roots are (alpha + beta),(beta +

asked by Aditi Singh on May 21, 2018
4. ## maths pls help

1. Solve the following simultaneous equations: log2 xy = 7 log2 (x^2/y) = 5 2. If log y x =a and log z x=b where x is not equal to 1, express the following in terms of a and b: logy (yz) Solve the following simultaneous equations: y = 2 log3 x y+1 = log3

asked by Claire on November 21, 2007
5. ## Calculus

I've been working on this problem for while, and I keep getting the answer wrong every time I do it. The volume of the solid obtained by rotating the region enclosed by y=e^(5x+1) y=0 x=0 x=0.8 about the x-axis can be computed using the method of disks or

asked by Anonymous on February 9, 2013
6. ## Math

In Super Bowl I, the Green Bay Packers defeated the Kansas City chiefs by a score of 35 to 10. The total points came from 13 different scoring plays, which were a combination of touchdowns, extra point kicks, and field goals, worth 6, 1, and 3 points

asked by David on February 2, 2016
7. ## chemistry

A solution of 0.178 M KOH(28.3 ml) is mixed with 28.9ml of 0.133 M HCl. Assuming that the final solution is the sum of the initial volumes, caculate: a)the molarity of the K+ cation b)the molatiry of the Cl- anion c)the pH of the final solution d)the pOH

asked by helen on February 8, 2012
8. ## chemistry

An aqueous solution of phosphoric acid, H3PO4, contains 285 g H3PO4 in 400 mL solution, and has a density of 1.35 g/mL. Calculate a. the weight % H3PO4 in this solution. b. the concentration in mol/L of this solution

asked by princess on November 10, 2010
9. ## chemistry

an impure sample of oxalic acid C2O4H2, with a mass of 0.465g, is dissolved in water. a few drops of phenolphthalein indicator solution are added, and the solution is titrated with 0.190 mol/L aqueous sodium hydroxide held in a burette. the solutointurns

asked by tarkan on December 24, 2010
10. ## Chemistry (urgent)

Hi, I have a few chemistry problems that I'm having trouble solving. I put my attempted solutions after the problems in *'s. There was one problem I had no idea how to solve. What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve to make a

asked by Maggie on April 12, 2010
11. ## MATH

(Please) Show all the steps that you use to solve this problem. The graph of g(x) is f(x) translated to the left 8 units and up 2 units. What is the function rule for g(x) given f(x)=x^2?

asked by Ben Folds on February 13, 2019
12. ## college algebra--I really need help!!

solve the following exponential equation. exact answers only. 1-9x 2x 2 = e I hope that you understand this question. I don't and need some help please. Can you show all answers please.

asked by Ladybug on November 25, 2012
13. ## Algebra 1--Step-by-Step

Can someone show me how to solve these step-by-step? Please? Thank you. Factor each polynomial by grouping. Check your answer. 1. 2r^2 - 6r + 12 - 4r 2. 14q^2 - 21q + 6 - 4q 3. w^3 -4w^2 + w - 4 4. 2p^3 - 6p^2 + 15 - 5p

asked by Anonymous on March 1, 2014
14. ## algebra

and for this one I got no clue: By what percent will the fraction increase if its numerator is decreased by 10% and denominator is decreased by 50%? can you just show the equation, i can solve it

asked by Ashly on October 7, 2017
15. ## math

Solve for x in the figure if AB=5x-5 and BC=2x+3. You need to provide additional information on how AB is related to BC before we can help you with that question. Perhaps that is what the missing figure is supposed to show.

asked by Susie on November 26, 2006
16. ## maths

Solve the following 2nd order differential equation explicitly by expanding up to order x5, y''(x) = (1 + x^2)*y(x) pls show working y =f(x)

asked by ryan on November 30, 2011
17. ## maths

Solve the following 2nd order differential equation explicitly by expanding up to order x5, y''(x) = (1 + x^2)*y(x) pls show working y =f(x)

asked by ryan j on November 30, 2011
18. ## Calc

Evaluate the function at the given values of the independent variable and simplify. f(x)= {x^2)-3 if x is less than or equal to -2 {6x+1 if x > -2 a. f(-3) b. f(0) c. f(-2) How do I solve this/what are the correct answers so I can check my work?

asked by Jillian on December 14, 2011
19. ## geomatry

the length of the radius of th dartboard is 9in. the diameter is represented by the expression 3x+3 write an equation that you cansolve for x then solve for x the x=5 but how do you work it out

asked by shea on September 26, 2012
20. ## Pre-cal

Solve (in radians) sec x = 2csc x When I work it out, it gets to 2cot x - 1 = 0 cot x = 1/2 Would it be ok to use tan^-1 (2) ? I must demonstrate it with a graph as well... would the line go through Q I/III or II/IV ? Thank you!

asked by A on November 15, 2016
21. ## math

Write a system of equations, three equations/three unknowns, that has (1, 2, 3) as the solution. for this can I just write any random coefficient and then put that as equal to 1,2 or 3? or if not what type of math would I use?

asked by Samuel on November 6, 2017
22. ## math

Given the equation - 3x +2y =4. Write another linear equation that will form a linear system with exactly one solution? I usually try to answer b4 i ask question But this time i'm really stuck. plz help ?

asked by Jay on April 15, 2015
23. ## MATH!

plz how do you solve these?- i keep getting the wrong answer 1. 3z/2 - 17/3 = 2z/3 - 3/2 2. 2/5b - 1/4b =3 3. 23 - 6g = 19 please show me step by step how you do these

asked by Sara! on June 9, 2010
24. ## Algebra

V = 1/3 Bh (solve for B) ________________________ Can someone please help me with this problem. And show me step by step. I'm really confused.

asked by Jinja on September 27, 2017
25. ## math

how do you solve the exponential equation, 12^x = 14^3x? If someone could show me step by step I would greatly appreciate it. thank you! :)

asked by Rachel on February 13, 2011
26. ## algebra

can someone show me how to solve this step by step I have sixteen to do and i am confused thank you ã2x -7+8=11

asked by xavier michael on September 16, 2013
27. ## Math

1) Given that p(-3), p(-1), and p(5)=0, which expression could be p(x)? A)x^3-x^2-17x-15 B)x^3+x^2-17x+15 C)x^3-3x^2-13x+15 D)x^3-9x^2+23x-15 I would appreciate if someone could show me how to solve it

asked by Anonymous on February 1, 2016
28. ## chemestry

Can you show me how to convert/solve this problem? 27 micro grams = ? grams

asked by Lisa on August 24, 2008
29. ## Math

Please show me how to set and solve: The sum of two numbers is 90. Their difference is 12. What are the numbers?

asked by Mary on February 13, 2012
30. ## algebra

show me how to solve this problem: Given an endpoint, C, and a midpoint, M, find the other endpoint, D, when C= (3,3), M= (0,0)

asked by keeya on December 3, 2009
31. ## math

solve √ ̅m+3 + √ ̅m-2 =5 (show step by step process of solving the equation)

asked by JUN on November 15, 2014
32. ## Algebra

Equation: RCF=NCF/(1+Pi)^t Can somebody show me how to rearrange the equation to solve for Pi.

asked by Tom on November 7, 2008
33. ## math

find the slope, if it exists x=-2 m = can someone show me how to solve this question?? I've never seen this question before....

asked by Anonymous on November 11, 2009
34. ## alg2 check?

solve: 2x+2(x+3)=2(x+7) what I got was x=4 but I really think I calculated wrong. Can you show me the step by step process please?

asked by tyneisha on July 18, 2013
35. ## math

new flat- screen TVs flash even faster than older TVs. Since dogs need a flicker frequency rate of 75, DOGTV works as intended only on newer TVs. One type of new Tv flashes 500 frames each second. How many more frames does it flash than an older TV with a

asked by osi on April 30, 2013
36. ## math

a local television station sends out questionnaires to determine if viewers would rather see a documentary, an interview show or reruns of a game show there were 350 responses with following results. 105 were interested in an interview show and a

asked by jim on April 27, 2011

I'm having a problem with the entire Chi-square thing.. I do have answers to these but I'm not sure how to work them out.. If you could help that would be great! :) 1st part: A,B,C are schools. Is the choice of math programs followed independently by

asked by Jason on January 28, 2011
38. ## statistics

I'm having a problem with the entire Chi-square thing.. I do have answers to these but I'm not sure how to work them out.. If you could help that would be great! :) 1st part: A,B,C are schools. Is the choice of math programs followed independently by

asked by John on January 28, 2011
39. ## Chemistry

Can you check if this is correct please? a) How many moles of sodium hydroxide are there in 19.00 cm3 of 0.100 mol dm3? My answer: 0.0019 mol b) How many moles of hydrochloric acid are, there in 25.00 cm3 of the acid solution? My answer: 0.0019 mol c) How

asked by Franky on October 16, 2011
40. ## AP Physics B

system consists of a steal beam of mass M 􏰀 68.4 kg and length L 􏰀 1.84 m, with a 39.0-kg brass sphere attached at the right end of the rod, as shown below. BA a. Determine the moment of inertia of the system for rotation about an axis through the

asked by Larry on December 11, 2012
41. ## Chemistry

Assume you have prepared 100.0 mL of a buffer solution using 0.400 mol of acetic acid (pKa = 4.74) and 0.400 mol of sodium acetate. The pH of this buffer solution is initially 4.74. After preparing this buffer solution, you added 55.0 mL of a 1.10 M NaOH

asked by J on November 26, 2015
42. ## algebra

Identify the vertices of the solution region of the system of linear inequalities. (Order your answers from smallest to largest x, then from smallest to largest y.) x ≥ −2 x ≤ 3 y ≤ 5 y ≥ x (x, y) = (x, y) = (x, y) = (x, y) = Tried several times,

asked by Abby on December 4, 2014
43. ## Math ~ Check Answers ~

A system of linear equations is shown below. 5X = 3y - 2 y = X + 4 What is the x -coordinate of the solution? a.) 2 b.) 4 ***** c.) 5 d.) 1 Jean needs to graph the function below. y = 7x ^2 + 8x -6 How many times should the graph of this function intersect

asked by Sabrina on February 19, 2014
44. ## Math ~ Check Answers ~

A system of linear equations is shown below. 5X = 3y - 2 y = X + 4 What is the x -coordinate of the solution? a.) 2 b.) 4 c.) 5 d.) 1 ***** Jean needs to graph the function below. y = 7x ^2 + 8x -6 How many times should the graph of this function intersect

asked by Chloé on February 18, 2014
45. ## AP Chemistry

A mixture of 20.0 grams of CaO and BaO is placed in a 12.5 L vessel at 200oC with excess CO2 . The mixture is allowed to react to completion forming CaCO¬3 and BaCO3 .The pressure in the container after reaction is 220 torr. The solid carbonates are

asked by Jim on January 3, 2015
46. ## operating system

a. What is the name and version number of the operating system? Windows XP Professional Service Pack 2 b. What kind of user-interface is used? window XP theme c. Can you see an indication that this operating system provides a job management function? If

asked by denise on October 19, 2008
47. ## HELP MATH PLEASE

You have two beakers of acid solution. One beaker contains a 17% acid solution, and the other beaker contains a 91% ACID SOLUTION. How many liters of the 17% acid solution must you mix with the 91% acid solution to make 2 liters of a 56% acid solution?

asked by cierra on November 6, 2015
48. ## Chemistry

Using the half- reaction method, balance the redox reaction shown below. (I-)+(Br2) ---> (IO3-)+(Br-) Step 1. Break the reaction into the two half reactions. Br2 ==> Br^- I^- ==> IO3^- Step 2. I will leave the first one for you to do. The second one is

asked by Aubrey on June 13, 2007
49. ## science

In the lab you need to make 1.00 L of a 0.300 M NaCl solution. You had previously made a 0.950 M NaCl solution that you can dilute to form your new solution. How many mL of the concentrated solution would you use to make the dilute solution?

asked by liz on November 2, 2011
50. ## MECHANICAL ENGINEERING

Need help with some engineering math problems? 1. You wish to determine the total system efficiency of your hydraulic press that is powered by an electric motor. The characteristics of the hydraulic press are as follows: •Electric motor utilizes 5 amps

asked by Anonymous on April 18, 2013
51. ## Chemistry

Can you draw a dipeptide and show all the functional groups, atoms, and bonds, any full charges on atoms, and the "R" group. Also, show N and C terminus? It would really help if you can show me pictorially.. thanks

asked by Sam on October 11, 2011
52. ## Math

A druggist mixes a 10% solution of iodine with a 15% solution of iodine. How much of each solution should be used in order to obtain 20 cubic centimeters of a 12% solution?

asked by Vinnnie on February 10, 2010
53. ## Chemistry

What is the molarity of a solution with 3.5mol of CaCl2 in 1.89L of solution What is the molarity of a solution with 16g of CH3OH in 487mL of solution

asked by Ali on March 4, 2009
54. ## Chemistry

You have a large amount of 8.00 M stock solution. You need 1.60 L of 3.00 M solution for an experiment. How would you prepare the desired solution without wasting any stock solution?

asked by LuigiR on November 13, 2015
55. ## Chemistry

You have a large amount of 8.00 M stock solution. You need 1.60 L of 3.00 M solution for an experiment. How would you prepare the desired solution without wasting any stock solution?

asked by LuigiR on November 13, 2015
56. ## Chemistry

A solution has [OH-] = 3.5 × 10-6. Based on that, what must be true about this solution? A. It is an acidic solution. B. It is a strong base. C. It is a strong acid. D. It is a basic solution.

asked by Laura on September 17, 2016
57. ## linear algebra

use a computer software or graphing utility to solve the system of linear equation. x₁+0.5x₂+0.33x₃+0.25x₄=1.1 0.5x₁+0.33x₂+0.25x₃+0.21x₄=1.2 0.33x₁+0.25x₂+0.2x₃+0.17x₄=1.3 0.25x₁+0.2x₂+0.17x₃+0.14x₄=1.4

asked by =) on June 25, 2014
58. ## Math

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

asked by Alex on January 7, 2015
59. ## statistics

starting with the values 70 and 100, add 3 data values to the sample so that the mean is 76. the median is 82 and the mode is 82. show work

asked by mary on October 11, 2010
60. ## Pre-Calculus

Evaluate the expression under the given conditions.? show work please! sin(A-B); tan A=12/5, A in quadrant 3, sinB=-3sqrt(10)/10, B in quadrant 4.

asked by Kimberly on April 21, 2012
61. ## Educational Research

: 150 scores on a test are normally distributed with a mean of 92 and a standards deviation of 11.5 1) Find z score corresponding to a score of 69. Show work.

asked by Betty on December 14, 2011
62. ## math

The distance between points A and B is 10 units. If a has coordinates (4,-6) and B has coordinates (-2,y), determine the value of y. Please show work and explain. A.-6 B.-2 C.0 D.1 E.2 This is what I got so far: 10= square root of (4-(-2))^2+(-6-(y))^2

asked by Johnny on May 30, 2014
63. ## Math help asap

So I've been stuck on this question for about 15 minutes, I could use a bit of help.. Find the function rule for the table, show all your work: (table) x: -2, -1, 0, 1, 2 y: 9, 4, -1, -6, -11

asked by Anonymous on February 28, 2019
64. ## Geometry

The ratio of the side lengths of a quadrilateral is 2:4:5:7 and its perimeter is 36 meters. Determine the length of each side. x =       a =       b =       c =       d =       Show work

asked by Carrie on February 1, 2016
65. ## physical science

during a race a runner runs at a speed of 6 m/s. 2 seconds later she is running at a speed of 10 m/s. what is runners acceleration? show your work.

asked by trina on March 26, 2013
66. ## math

find the eqt. of the tangent to the curves at (1,2). y^3+y^3=9(xy-1) [ans: y=5x-5] could some1 show me the calculation work bcus my ans is y=(6x+4)/5.

asked by lily on July 21, 2011
67. ## Geometry

A. Find the values of a and b that would make the quadrilateral a parallelogram. B. Make sure to show work Top 6b-3 Left 2a+6 Right 3a-10 Bottom 5a+1 Thank you

asked by Genevieve on January 15, 2016
68. ## 4th grade math

Amanda and her four sisters divided 1,021 stickers equally. About how many stickers would each girl receive? How do I show my work?

asked by Ali on February 1, 2015
69. ## CHEMISTRY HELP !!!!

Cell Designation : E (measured) = Sn I Sn^2+ II Cu^2+ I Cu Temp= 3 Celsius Temp= 276.15 Kelvin Delta G= ????? Show work please!!!!

asked by Anonymous on April 30, 2014
70. ## statistics

if there 60% math major are women, 15 were random. what probility 12 women were are selected and what are the mean and variance. Show ne how to work the problems

asked by landa givens on September 21, 2010
71. ## Math - Algebra

What is the value of the greatest of four consecutive integers if the least minus twice the greatest equal 8? Please show the work so I can understand how to complete the problem - thank you

asked by John on November 3, 2018
72. ## math

Mrs. Grace has 10 sandwiches that are 4 inches in diameter. They can fit exactly into a different box... Need to show work in box, help, can't seem to figure this out

asked by Nancy on April 8, 2014
73. ## math 1350

If the following fractions are arranged from smallest to largest, then which fraction would be in the middle? Explain. Show all work using fractions(NOT DECIMALS). 2/3, 4/5, 3/7, 5/9, 3/4

asked by Ne Ne on November 23, 2015
74. ## algebra

conversion practice. show all work!!! 1. an emu can run 31 miles per hour. what is the emu's speed in feet per second?

asked by sahsa on September 8, 2015
75. ## Math

Find all complex zeros for the following polynomial function. Please show all of your work. f(x) = x^4 - 91x^2 - 900 Hi, I need help... I'm not understanding this complex zero..

asked by CheezyReezy on June 1, 2011
76. ## Physic II

A small glass bead that has been charged to 4.4 nC? What is the strength of the electric field 2.0 cm from the center of the bead? Please show all work

asked by Johnathan on January 26, 2014
77. ## physics

Zircon is sometimes used to make fake diamonds. What is its index of refraction if the speed of light in zircon is 1.6 x 10^8 m/s. Please show all work Thank you.

asked by abster on May 8, 2011
78. ## Math

!!PLEASE SHOW YOUR WORK!! My recipe makes 96 cookies, but I'll only need 24 for the party, what will I multiply each ingredient by to make just 24 cookies? Explain.

asked by Alyssa on January 21, 2015
79. ## Pre-Calc Help

Evaluate the expression under the given conditions. (show work please) sin(A-B); tan A=12/5, A in quadrant 3, sinB=-3sqrt(10)/10, B in quadrant 4.

asked by Daniel on April 19, 2012
80. ## mat115

can someone help me with this math question. I am asked to show my work but I don't know how to do so. The question is: The following set of numbers a perfect triple? 8, 10, 12 yes or now and how so? Thanks for your help.

asked by adore001 on August 25, 2010
81. ## Math(Urgent)

Find the exact values of the vertical asymptotes for o is less than or equal to Q is less than or equal to pi for the function y= cot(3Q) I need to show my work for this one but I do not know how to do this.

asked by Hannah on March 19, 2010
82. ## Physic

A small glass bead that has been charged to 4.4 nC? What is the strength of the electric field 2.0 cm from the center of the bead? Please show all work

asked by Peri on January 27, 2014
83. ## Algebra

For f(x)=(3x^2)+5and g(x)=7x-2, a. Verify: g(x + 2) ≠ g(x) + g(2). b. Find (f – g)(x). c. Using the resulting function in (b), show that (f – g)(2) = f(2) – g(2). (The work should be different for each side of the equation.) d. Is (fg)(0)

asked by Sam on April 2, 2015
84. ## 7th grade math honors

The total cost for renting a kayak is represented as 25+5.50m. What is the constant in the expression 25+5.50m? Show work.

asked by Kennedy on January 12, 2015
85. ## math

A. write (2^3)^3 as a single power of 2. show your work . B.write your answer from part A as a standard number. please help i don't get it.

asked by hanna on April 19, 2009
86. ## MATH HELP

Will someone please explain and show how to work this one: How many different whole numbers can be made with the digits 5, 7, 8? For this problem, each different whole number may have 1, 2, or 3 digits and a digit may be repeated.

87. ## Intermediate Algebra

I am having trouble with these two. Can you please help me?? Find the following product: -4x^2y (-4x^3y^5) Essy, Show all work. Find the following quotient: 16x^2-25y^2 ___________ 4x + 5y

asked by ladybug on June 6, 2012
88. ## math

explain and show work a 140 lb student burns 5.4 calories a minute after 60 minutes how much calories were burned?

asked by bamawam on September 25, 2008
89. ## Physics

Work of 730 J is done by stirring an insulated beaker containing 80 g of water. What is the change in the temperature of the water? Please show calculation

asked by BOB on October 19, 2011
90. ## Math

Find the exact values of the vertical asymptotes for o is less than or equal to Q is less than or equal to pi for the function y= cot(3Q) I need to show my work for this one but I do not know how to do this.

asked by Hannah on March 19, 2010
91. ## math

Janelle has \$20 and is saving \$6 per week. April has \$150 and is spending \$4 per week. When will they both have have the same amount of money? please show work,

asked by Johnny on July 24, 2014
92. ## calculus

Determine the quadratic function f, whose graph is given. **The graph given is (0,-2) and (3,-11) The vertex is (3,11) and the y-intercept is -2 So, f(x)= **Please help me understand how to do this question. Could you please show work?**

93. ## Algebra 2

simplify each expression. rationalize all denominators. assume that all variables are positive (1-sqrt(3x))/(sqrt(6x)) Please show work!!!!

asked by maria on February 9, 2015
94. ## English

Posted by rfvv on Wednesday, October 27, 2010 at 8:52am. 1. Do you do any volunteer work? How about your friends? 2. Yes, I do. They do volunteer work, too. 3. No, I don't. They don't do volunteer work, either. (Are the answers grammatical?) 4. Do you do

asked by rfvv on November 6, 2010
95. ## Language Arts

Read each sentence. Circle the contraction or contractions in each sentence below: 1. He's going to show me how to prepare dinner. Answer: Circle He's 2. Can you tell if she's your friend or enemy? Answer: Circle she's 3.We'll have to empty out our garage

asked by Patrick on March 2, 2016
96. ## chemistry

How many moles of O are present in 14.8 moles of Fe(NO3)3? Can you show work so I can understaned how to do.

asked by lizzie on March 24, 2008
97. ## math

the product of three consecutive numbers is 4080. what are the numbers? please show work.

asked by magda on September 1, 2010
98. ## algebra

Find the x- and y-intercepts for the equation. Please show all of your work. Then graph the equation 2x + 3y = 15

asked by nicole on November 1, 2011
99. ## Geometry

The equation of a circle is x^2 + 6x + y^2 - 2y = 15. What are the center and radius of the circle? Please show work.

asked by Anonymous on May 3, 2011
100. ## math

If a rule is (3x,y) and a scale factor of 4 is used to transform it , what will the new rule be??? Show work

asked by my world on March 27, 2007