# 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 484
1. ## Augmented Matrix

can someone please help me solve this question? I tried so many times but I still could not get it... 2x + 3y = 4 5x + 6y = 16 Augmented Matrix the ans is supposed to be (8,-4) thanks in advance much appreciated

asked by Kabdul on March 3, 2009
2. ## Calculus 2

I'm confused on how to solve or set up a substitute for the problem. Evaluate the Integral from 1/4 to 1. 1/ sqrt(16t^2 -1) dt

asked by Ashley on January 22, 2013
3. ## math

How do you solve: imgur[dot]com/PlcCL8s [I had to upload cause its impossible to write proper notation here.

asked by Hasane on March 18, 2013
4. ## Pre-algebra

So i am having a hard time with special right triangles and wanted to know how to solve problems such as: (45,45,90) and (30,30,60) problem. I know how to do it but need extra help.

asked by Alex I. on March 7, 2011
5. ## maths

r=1-rcos(theta)convert into rectangular equation? r with cos creating trouble for me how to solve this?

asked by Asfand on November 29, 2016
6. ## Calculus

Solve the integral: 5/x(x^2-4) dx I've done the partial fractions and found B and C, both equaling 5/8; and that's gonna give me 5/8 ln|x^2-4|. I just need help finding A

asked by Mike on October 2, 2018
7. ## Algebra 2

Solve this formula for r. Simplify your answer. E/d=R+t/r Make sure you use parenthesis around any polynomials in the numerator and or denominator.

asked by Nancy on April 5, 2012
8. ## Precalculus

Sin - cos = - radical 2 I don't understand this. It wants you to make the right side equal to zero and solve

asked by Anonymous on April 21, 2014
9. ## calculus

Solve the differential equation below, given the initial condition f(0) = 3. Express your answer using words or symbols. y=-5x^2

asked by Courtney on November 30, 2011
10. ## Analytic Geometry

Give the equation of the circle tangent to both axes of radius 5 and in the 1st quadrant. Can you help me solve this?

asked by Lance on January 21, 2013
11. ## Solve two way subtraction

Solve each problem in two ways. Use clear and concise notation in your solutions. 8,593-2,748

asked by Kaliya on November 7, 2013
12. ## math

Use the digits 0,2,4,5,6 and 8 to write two money amounts that you can subtract by trading 1 dime for 10 pennies. Then solve.

asked by megan on January 18, 2011
13. ## math 116

Solve using the multiplication principle Don't forget to preform a check 11x=-99 Would the answer be -9?

asked by Katie on September 26, 2011
14. ## Math

Find the equation of the line of intersection of the two plane given by x+y+z=5 and 4x+y+2z=15 Pls help me to solve this.. After i use cross product i got (1,2,-3)..Then what should i do?

asked by Yong on October 28, 2015
15. ## Physical Science

When attempting to solve a gravitational potential energy equation, is the free-fall acceleration always 9.8m/s2?

asked by Monique on January 26, 2009
16. ## math

Solve for n: ((3^n)^n*(3^n)^-1) / 81 = 1 Answer (n) = -1, 4 I have no idea how n = -1, 4. Also, please don't ask if the answers are actually wrong or not, they are directly from the text book.

asked by anonymous on November 23, 2017
17. ## math

need help to solve the following ploblem, and like problems: 5 minutes = _____ hours (what is the fraction) I'm in the 5th grade

asked by Janae on January 31, 2008

Could someone help me with those two questions. I need to know how to do them without calculator solve for the interval [0,2pie] 1) cos^2*x-cos2x=0 2) tan(x/2)-sinx=0

asked by Anonymous on June 2, 2010
19. ## Algebra

solve the equation by completing the square. round to the nearest tenth. x^2+8x=10 A. 1.1, 9.1 B. 1.1, -9.1 C. -1.1, 9.1 D. -1.1,-9.1 my answer is A is that correct

asked by Cassandra on April 8, 2017
20. ## math

need help how to solve rounding riddles? rounded to the nearest ten. I am 170. The sum of my digits is 14.

asked by Noah on September 28, 2011
21. ## trig

Solve rounding to 2 decimal places. 9cosx + 4cos(2x) + 1 = 0 over 0° ≤ x < 360° Thanks to anyone that can help! I'm totally stumped.

asked by Jodi on April 10, 2013
22. ## maths

Find the coordinates of the points of intersection of the straight line y = 3x - 6 with the parabola y = x^2 - 6x + 8 and solve Graphically.

asked by Shane on May 12, 2014

Analyze the problems, issues, and tasks employees will have to solve to best provide such a service to customers

asked by Nicole on December 2, 2009
24. ## co-ordinate

Please help me to solve this:find the equation to the circle circumscribing the quadrilateral formed by the straight lines, 2x 3y=2, 3x-2y=4, x 2y=3 and 2x-y=3

asked by math on July 25, 2015
25. ## Algebra

Find a power function of the form y=ax^b whose graph passes throught the points (2, 5) and (8, 12). How do i solve this??

asked by Brittney on April 30, 2011
26. ## algebra

need helo solving this Equate y=-4 to y=mx+b. What is the value for m so that these equations are equivalent I need a fast response on how to solve this problem can someone help please?

asked by misty on March 30, 2012
27. ## math (advanced alg and trig)

Solve to the nearest minute: x is greater than or equal to 0 and less than 360. 3sec^2 x-8tan-6=cotx

asked by Anne on March 28, 2010
28. ## Math

Looking to find the missing digit for each statement true. The number 874_ is divisible by 4. Please help how to solve

asked by Cyle on August 28, 2015

1.evaluate without using a calculator 2logx+1=log900 2.solve the following equation A. 3log(x-2)=4.714 B. 16^x-3 = 8^2x+1 C.10^2x=1/100

asked by Maria on March 11, 2015
30. ## math(algebra)

How can you solve problems involving equations that contain addition subtraction multiplication or division? Pls help me!!

asked by Ary on March 1, 2016
31. ## Calculus

Solve the seperable differential equation 8yyŒ =x. Use the following initial condition: y(8)=4. Express x^2 in terms of y.

asked by Robin on November 15, 2013
32. ## Chemistry

The solubility product for Ni(OH)2(s) is 1.6 ✕ 10−16. Calculate the value of ℰ° for the following half-reaction. Ni(OH)2 + 2 e− → Ni + 2 OH − I have no idea what equation to use or how to solve this problem

asked by Elizabeth on May 11, 2018
33. ## alge

What square root property is essential to solve any radical equation involving radicals?

asked by shelly on August 21, 2010
34. ## maths

3x + 14y = 5xy 21y - x = 2xy kindly solve the pair of linear equation

asked by manavi on July 22, 2015
35. ## Trig

How do you solve this problem? y = 2sin 3x + 4sin 2x I haven't done these types of problems for awhile and have forgotten how to do them.

asked by Mary on March 5, 2014
36. ## Science

in science, skepticism means coming up with inventive way to solve a problems or produce new things

asked by Mia on September 8, 2016
37. ## precalculus

how do you solve an equation by extracting square roots? my book can't help, and the teach can't explain it so i understand it.

asked by april on September 8, 2007
38. ## math

Solve the equation by using the square root property. Simplify all radicals. (a) x2 = 256 (b) t 2 = -144

asked by mandy on December 3, 2011

*Describe your graphs using words. 2x > -6 and x - 4 < 3 You have to solve for x. x>= -3 and x

asked by Margie on March 12, 2007

Use row operations on augmented matrices to solve the given systems of linear equations. x + y − z = 0 x + 2y + 4z = −3 3x − y − 22z = 19

asked by cameron on November 16, 2015
41. ## COLLEGE CALCULUS. HELP!

the fundamental theorem of calculus, f(x)=∫(0,x) t^3+2t^2+ 2 dt, and find f"(x). my answer was: f'(x)=x^3+x^2 f"(x)=3x^2+2x it said its wrong. i don't know how solve with interval, ∫(0,x)

asked by MILY on April 17, 2012

Solve 3-3 csc x = 17 for (theta) is less than or equal to x is less than 2(pi); give answer to the nearest 100th of a radian

asked by Hilary on February 22, 2010
43. ## Math Algebra1A

What are two symbolic techniques used to solve linear equations? The only thing I find is eliminating or substuting is that right?

asked by Kim on June 20, 2013
44. ## statistics

if n=30 and p=.23 what is P(20,x,23)= and P(x.23)= I think I need to find the z scores in order to solve but how do I read the table or do I even need it. UGH! so confusing especially 20 years later.

asked by Amy on October 31, 2013
45. ## Math

A. L1: (0,-1), (5,9) L2: (0,3), (4,1) The lines are perpendicular because there slopes product equal -1. The point they intersect is (1.6,2.2).(Is this true and how do you solve it)

asked by Khylisha on February 9, 2011
46. ## linear algebra

1.solve x-7>10 a.x>3 b.x>7 c.x>17 d.x>70 this is for the solving multiple step inequalities please help with all ten questions i have 1.a 2.d 3.c 4.c 5.b 6.d 7.c 8.d 9.b 10.b warning these are what i have and are not correct

asked by stewpeed connexus kid on December 5, 2018
47. ## Calculus

Please help me solve these problems. 1.Find the inverse function (f^-1) of √3x-2 2. Integration ∫ the top is x while the bottom is 1. (sin(t))/t dt

asked by Jessica on February 19, 2017
48. ## math

kx^2 + (k+2)x -3 =0 has roots which are real and positive. Find the possible values that k may have. I understand that I have to use the discriminant to solve this, but I can't seem to get the answer right, so I really need help!!

asked by Anita on September 28, 2014
49. ## college algebra

help solve 8=2^5x * 4^x^2 logarithms eight equals 2 to the 5x times 4 to the x squared in case I didn't write it correctly.

asked by Cindy on May 2, 2010
50. ## Linear algebra

please help me with this question I have no idea how to solve it, thanks Suppose T is a transformation from ℝ2 to ℝ2. Find the matrix A that induces T if T is rotation by 1/6π.

asked by shana on March 21, 2017
51. ## Triangles

solve any triangles satisfying alpha = 20 degrees b = 10 c = 16 b and c are 2 side values and if I use the pythagorean theorem and I get 18.18? Did I do this right?

asked by Greg on November 14, 2012
52. ## MATH

How to solve for time? total of 800 miles, driving an average speed of 55 mph?

asked by TROY on March 1, 2009
53. ## 12 U Math

Solve and check for extraneous roots. log_2x+log_2(x+2)=3 * _2 is a subscript and (x+2) isn't a superscript*

asked by Vikki on January 12, 2015
54. ## Math

lim (as x approaches infinity) (x^2-1)/(x^2+1) How would you solve that by using algebra? I can simplify the above because it is difference of squares. But then what about the bottom

asked by Jaimie on August 14, 2010
55. ## Math

Find the number that completes the equation. 6/5 divided by blank equals 6 IDK How to solve this.

asked by Snowstorm on January 11, 2019
56. ## geometry

Write and solve an inequality to find the calues of x for which the area of the rectangle is greater than the are of the triangle

asked by Bob on December 15, 2010
57. ## Physica

if A=12x - 16y and B= - 24x + 10y,what is the magnitude of the vecror C=2A-B? Please check out the necessity to solve them and thank

asked by Q77 on July 11, 2012
58. ## Math

I've missed a lot of math in the past few years so I'm a bit behind. I need to solve this question using reciprocals. 15.6 + 5.5 ------------- 18.1(11.1-9.2)

asked by Lallie on February 23, 2009
59. ## Algebra

Adding and subtracting polynomials. Can someone help me solve this problem? 5x^3 . 2x^2 - 10x^4 + 3x^5 + 3x .(-2)x^4 . = The dot means to multiply. Thank you.

asked by Alex on September 28, 2014
60. ## Health and science

What problems could a solar powered pond water filter solve and what impact would it have on people?

asked by smart1111 on January 19, 2016
61. ## CHECK MY ALGEBRA 2

Write an equation that would have a hole at x = 4 and a vertical asympote at x = -2. My answer was f(x)= (x-4)/(x+2) If it is not correct can someone please help me solve it and explain it to me? Thanks!

asked by Kate on July 25, 2016
62. ## math

Solve the formula for the given letter. Assume all variables represent nonnegative numbers. a^2+k^2=j^2, solving for a

asked by jen on April 6, 2010
63. ## Algebra 1

Find the roots of each quadratic polynomial. 1. 16x + 40 + 2x^2 Solve. Round to the nearest hundredth. 2. 12 = 5x^2

asked by Victoria on May 9, 2014
64. ## Pre-Algebra

Here are some more: 1.Use transformations to solve the equations: 5{6+k}=3k 19-3m+ 5+7m

asked by mysterychicken on May 1, 2009
65. ## Math

Using the numbers 2, 5, 10 , 50 solve the following equation to make the number sentence true... ? - ? Divided by ? + ? equals 50

asked by Lilly on September 30, 2010
66. ## Calculus

Can someone please walk me through the steps, I am just not sure what to do next. thanks Solve the optimization problem. Minimize F = x^2 + y^2 subject to xy^2 = 16 I took the derivative F = 2x + 2Y but I don't know where to go from here.

asked by Jennifer on November 6, 2014
67. ## Algebra

I am in dire need of some help I am not understanding this at all I am to solve the systems of equations by graphing 2x-y=14 2x+3y=-10 Could someone please explain this to me in dummy terms

asked by Anonymous on June 26, 2008
68. ## calc

I am not sure how to approach this...I have to find the value of x that makes the derivate of f(x) equal to zero...here's what I have so far (is it correct?) and how is the problem finished? Thank you very much! f(x) = (1/x) + ln(x) f'(X) = ln|x| + (1/x) 0

asked by APpreciate student on October 2, 2010
69. ## algebra

2x+(x-y)^3 when x=9 and y=7 This problem is from a test review sheet (answer included)I have almost filled a notebook trying to solve this.

asked by Vikki on February 9, 2011
70. ## physics

I have a couple physics questions I need help with please! If you could show me step-by-step directions, I'd really appreciate it! A boat with a horizontal tow rope pulls a water skier. She skis off to the side, so the rope makes an angle of 15.0 degrees

asked by physicsclass on April 16, 2011
71. ## Principle of operation

Regarding extraction, the heading is: Descripton of method. Principle of operation. My description is: Extraction is based on the principle that a certain solute will dissolve in two immiscible phases, one of which is usually liquid. For example, where one

asked by Sheryl on October 7, 2006
72. ## MLA CITATION QUESTION... I NEED HELP ASAP

i am doing a works cited for my essay and one of my articles was from wikipedia online. what do i do if i can't find an author? At the bottom of the Wikipedia page is likely a set of Footnotes or a small bibliography, you may want to search amongst those

asked by anonymous on February 15, 2007
73. ## Chemistry

Calculate the molality, molarity, and mole fraction of FeCl3 in a 39.2 mass % aqueous solution (d = 1.238 g/mL).

asked by Stevi on February 16, 2013
74. ## Chemistry

Determine The Mole Fraction Of Substances In Solution Containing 36g of water and 46g of glaycerine C3H5(OH)3.

asked by Biruk Wonbera on November 29, 2013

b. Explain why the initial value problem y'=4xsqrt(1-y^2) with y(0) = 4 does not have a solution. I already solved the differential equation and got y=sin(2x^2+C) I don't know what to do from there

asked by Danni on April 20, 2017
76. ## Chemistry

How many milliliters of an aqueous solution of 0.219 M magnesium bromide is needed to obtain 10.1 grams of the salt ?

asked by Connor on October 3, 2012
77. ## chemistry

Calculate the molarity (M) of a solution of the strong acid H2SO4 if the hydrogen ion concentration is 0.000244 M.

78. ## chemistry

if 20g of sugar are added to a beaker filled with 200g of water what is the percent composition of the solution ?

asked by Ryan on April 5, 2012
79. ## chemistry

Calculate the molarity (M) of a solution of the strong base RbOH if the hydroxide ion concentration is 0.000309 M.

80. ## Chemistry

Balance the following equation for a half reaction that occurs in acidic solution. Use e– as the symbol for an electron. Mo^3+ -> MoO2^2+

asked by Anon on December 2, 2012
81. ## chemistry

A quantity of 2.20 mol of CaCl2 are dissolved in 1.00 L of water. What is the freezing point of this solution at 1 atm of pressure?

asked by Anonymous on May 18, 2011
82. ## Chemistry

A student must prepare 2.00 L of 0.100 M Na2CO3 (106 g/mol) Which is the besst procedure for preparing this solution ?

asked by Cynthia on February 22, 2012
83. ## chemistry

calculate the molality, molarity, and mole fraction of NH3 in an 12.80 mass % aqueous solution (d=0.9651 g/ml)

asked by maria on September 8, 2014
84. ## ecc

Describe how you would make up3.2 g of a 5.00% aqueous solution of NaCl(i.e. find masses of the components that need to be mixed).

asked by george on April 15, 2013
85. ## Chemistry

Minimum elevation in boiling point is given by a solution of 1. 0.1M Urea 2. 0.1 NaCL 3. 0.1 Mgcl2 4. 0.1M AL2(So4)3

asked by Raghavendra on April 10, 2014
86. ## chemistry

To half of it (500. mL), you add 0.0100mol of hydrogen ions without changing the volume. What is the pH of the final solution?

asked by pablo on July 22, 2013
87. ## chemistry

How many milliliters of an aqueous solution of 0.165 M aluminum chloride is needed to obtain 13.2 grams of the salt?

asked by lanorris on December 1, 2014
88. ## chemistry

why different masses of precipitate were obtained when various volume of solution lead nitrate and potassium iodide mixed

asked by jakae on March 25, 2011
89. ## chemistry

the maximum solubility of nacl in water to form brine at 0 c is 26% (mass/volume.) the density of the solution is 1.2 g/ml

asked by cariel on January 31, 2018
90. ## Chemistry

what information must you know to calculate the boiling point elevation of a solution of hexane in benzene. Is it the temp, Kb and the molality?

asked by Coco on August 7, 2015
91. ## Chemistry

Only 0.0640 grams of PbF2 will dissolve in 100.0 mL of solution. From this data, calculate the Ksp by two methods.

asked by sea lively on August 14, 2018
92. ## ecc

Describe how you would make up3.2 g of a 5.00% aqueous solution of NaCl(i.e. find masses of the components that need to be mixed).

asked by george on April 15, 2013
93. ## College Chemistry

what is the maximum weight of CuCl that can be prepared from the reaction sequence using 1.0g of Cu turnings to prepare the Cu2+ solution?

asked by Maggie on October 7, 2010
94. ## Chemistry

Calculate the solubility of the compoud PbI2 in a 0.0333 M solution of Mg(ClO4)2 using (1) activities and (2) molar concentrations

asked by Shane on February 6, 2019
95. ## science

What is the percent by mass solution made by dissolving 163g of table sugar cm 755g of water

asked by nathalie on June 25, 2014
96. ## chemistry

A solution is prepared by adding 50 mL of .050 M HCL to 150 mL of .10 M HNO3. Calculate the concentrations. I know I need to find the [H+] and [OH-] but im not sure how.

asked by Dannie on March 7, 2010
97. ## Algebra

Verify the solution by choosing the correct coordinate point whic states 3x-2y=2 5x-5y=10 Answer choices: (0,-1) (-4,-2) (-2,-4) (1,-5) Thanks for the help

asked by Joe on September 19, 2016
98. ## ecc

Describe how you would make up3.2 g of a 5.00% aqueous solution of NaCl(i.e. find masses of the components that need to be mixed).

asked by george on April 15, 2013
99. ## Chemistry

Can i please get a formula to calculate the concentration of an acid when it reacts with a standard solution? ( preferably 0.1 M NaOH and viniger )

asked by Daniel on August 5, 2010
100. ## chemistry

A solution is made by containing 15 mL of 17.5 M acetic acid with 5.52 g of sodium acetate and diluting to total volume of 1.50 L. Calculate the pH

asked by Gabby on March 23, 2015