# 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-
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## Advanced Math

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* -
## 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* -
## 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* -
## 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* -
## 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* -
## Foundations in business

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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## maths please help and explain

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* -
## 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* -
## Calculus

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

*asked by Robin on November 15, 2013* -
## 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* -
## alge

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

*asked by shelly on August 21, 2010* -
## maths

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

*asked by manavi on July 22, 2015* -
## 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* -
## 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* -
## 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* -
## 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* -
## Please Help[math]

*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* -
## business algebra

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* -
## 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* -
## Advanced Math

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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## MATH

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

*asked by TROY on March 1, 2009* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## calculus please help!!

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* -
## 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* -
## chemistry

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

*asked by HELP ASAP PLEASE on October 10, 2013* -
## 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* -
## chemistry

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

*asked by HELP ASAP PLEASE on October 10, 2013* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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*

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