# 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 714
1. ## math

how do solve equation? What equation?

asked by sha on September 11, 2006
2. ## Trig

Solve Log[8](log[5]x)=0

asked by Jody on January 30, 2012
3. ## algebra

how to solve for 6e-6/x2(squared)=2e-6/(4-x)2(squared)

asked by seb on January 3, 2011
4. ## Algebra

Solve. x^2+6x-4=0 x=-3+ã13,-3-ã13

asked by Anthony on July 2, 2008
5. ## algebra

solve sqrt () x + 7 = 2 sqrt () x a) none b) {3/7} c) {0} d) {7/3}

asked by poo on June 10, 2010
6. ## Pre-Cal

Log(x-6) +Log(x+3)=1 Solve for x thank u

asked by Anonymous on December 7, 2014
7. ## algebra

solve for x sqrt 6x+ 6=sqrt x + 12

asked by Anonymous on January 15, 2011
8. ## maths

how to solve this 14*9*100*100/63 cm

asked by kalyani on January 22, 2016
9. ## math

Solve for x: log3(x^2-4)-log3(x+2)=2

asked by julie on February 27, 2011
10. ## alg 2

asked by angie on February 14, 2007
11. ## math

Solve 5x+16 greater than 1 and 2x-21 greater than -17.

asked by Jennifer on March 21, 2010
12. ## Math

How could 20 multiplied by 10 help you solve 26 multiplied by 25.

asked by Kweku on October 10, 2007
13. ## Math 61

solve step by step 2/3y=12

asked by Jeri on March 15, 2010
14. ## maths

solve (x+2)(all squared) - (1-x)(all squared) = -5

asked by Amy on February 8, 2010
15. ## algebra

if log xy=6 and log x/y=2. solve for x and y

asked by jack on June 16, 2017
16. ## trig

Solve the following for x, where 0 < x < 2 pi. 2 cos^2 x + cos x = 1

asked by Sandy on March 8, 2010
17. ## Chemistry- Urgent Help

I want to know how can I solve for x if I am given 2.26= 1.000+x/ 1.000-x Thank You

asked by Rosa on March 19, 2008
18. ## math

Given that log y = log (10^n) solve for n.

asked by kudu on February 23, 2015
19. ## math

How do you solve C=ln(125000000/1-125000000

asked by Gina on January 16, 2012
20. ## math-algebra

Solve: log 5 (8r-7) = log 5 (r^2 + 5):

asked by Anonymous on September 26, 2007
21. ## maths

Solve log(5x-1) = 2 + log(x-2)

asked by Lindsay on May 27, 2014
22. ## algebra 2

SOLVE= log[6](x+3)+log[6](x+2)

asked by leo on July 9, 2012
23. ## Pre Cal

Solve for x Log(x-6) +Log(x+3)=1

asked by Anonymous on December 7, 2014
24. ## Math

Solve log3 x + log3 8 = 4

asked by Hannah on March 14, 2010
25. ## math-Alg

5. Solve: log 5 (8r-7) = log 5 (r^2 + 5): A. r = 2 or r = 6 B. r = -2 or r = 6 C. r = -2 or r = -6 D. r = 3 or r = 4

asked by Anonymous on September 26, 2007
26. ## algebra

the equation 6y=9-3x What do you want done with this equation? solve for x 6y=9-3x

asked by forest on May 10, 2007
27. ## math

how to solve 3[x-(- 1/3+2iã14/3)][x-(-1/3-2iã14/3)]

asked by dona on October 26, 2010
28. ## math

solve: x lnx - 30 + 5 lnx - 6x = 0

asked by jason on February 19, 2009

Solve log3 x + log3 8 = 4

asked by Hannah on March 14, 2010
30. ## Math

Solve {x}/{|x|} + {y}/{|y|} + {z}/{|z|} + {xyz}/{|xyz|} = 0.

asked by Math1234 on June 7, 2015
31. ## math

solve x-6 divided by 3-x-27 divided by 9=3

asked by brenda on January 31, 2016
32. ## Math

Solve log10(8 x) − log10(1 + √x) = 2 for x.

asked by Michael Weston on November 21, 2010
33. ## Algebra II

Solve for X. log(x^2-9)-1=log(x+3)

asked by Arielle on November 8, 2011
34. ## Maths

In the spring, 80% of the sheep in a flock of sheep had lambs. of those sheep with lambs, 30% had one lamb, 40% had two lambs and the rest had 3 lambs. a total of 240 lambs were born. how many sheep are in the flock? you must show your working.

asked by chloe on November 7, 2011
35. ## Math- Corrections

(-9)-4w+7w=42 I thought I knew how to do this, but my teacher said i was wrong. This what I thought: (-9)-4w+7w=42 (-9)-11w=42 +11w +11w (-9)=42+11w -42 -42 (-9)-42 (-9)+(-42) 11w=(-51) /11 /11 w= 4.636363636363...... She told us that the correct answer is

asked by Chris on November 5, 2007

1. The function f(x) = (2x + 3)^7 is the composition of two functions, g(x) and h(x). Find at least two different pairs of functions g(x) and h(x) such that f(x) = g(h(x)). 2. Give an example of two functions that satisfy the following conditions: - one

asked by Diane on January 15, 2014
37. ## Physics

A) A partly full paint can has 0.747 U.S. gallons of paint left in it. What is the volume of the paint in cubic meters? I got the answer as 0.00283 cm^3 B) If all the remaining paint is used to coat a wall evenly (wall area = 11.7 m2), how thick is the

asked by Em on September 23, 2010

Mr.Jones wants to put tiles on the floor by the front door of his house. He wants to use 3 different colors of tiles in his design. one half of the tiles to be blue, one fourth of the tiles to be gray, and one fourth of the tiles to be red. I need to use a

asked by mia on October 7, 2010
39. ## Statistics

Many dairy cows now receive injections of BST, a hormone intended to spur greater milk production. A group of 53 Jersey cows increased average milk production from 43 to 52 pounds per day, with a standard deviation of 4.8 lbs. Is this evidence that the

asked by Lisa on November 21, 2013
40. ## computer sciece

#include #include int main() { int num[100]={0}; int i,n=0; for(i=0; num[i] != EOF ; i++,n++) { scanf("%d",&num[i]); } printf("%d\n", i); while(i=0;i

asked by Tracy on October 26, 2011
41. ## College Math

What is the PROCUREMENT cost of the below system? Cost Types Cost (in millions) Research/Development \$400 Procurement of Prime mission \$800 Procurement of support equipment \$100 Procurement of Initial Spares \$100 Operations & and Support \$70,000 Disposal

asked by Susan on February 15, 2013
42. ## MATH&&HELP

What is the PROCUREMENT cost of this system? Cost Types Cost (in millions) Research/Development \$400 Procurement of Prime mission \$800 Procurement of support equipment \$100 Procurement of Initial Spares \$100 Operations & and Support \$70,000 Disposal \$100

asked by CHUCK on February 16, 2013
43. ## math

What is the PROCUREMENT cost of this system? Cost Types Cost (in millions) Research/Development \$400 Procurement of Prime mission \$800 Procurement of support equipment \$100 Procurement of Initial Spares \$100 Operations & and Support \$70,000 Disposal \$100

asked by CHARLES on February 15, 2013
44. ## COLLEGE MATH

What is the PROCUREMENT cost of this system? Cost Types Cost (in millions) Research/Development \$400 Procurement of Prime mission \$800 Procurement of support equipment \$100 Procurement of Initial Spares \$100 Operations & and Support \$70,000 Disposal \$100

asked by SHAWN on February 16, 2013
45. ## Econimics

Is president Obama's plan for health care reform socialism or common sense " mixed economy" approach in the economic and political mainstream of America? How would Adam Smith have used the free market to solve our health care problem? What other models

asked by Han on October 18, 2009
46. ## chemistry

Can someone tell me what steps i need to take? So confused on how to solve this An average human adult takes about 15breaths per min and exhales 23ml of co2 with each breath. If your trapped in a cave with pressure .963atm and 11C and your only source of

asked by ailee on September 23, 2014
47. ## English

Which sentence best reveals the writer's beliefs about the impact of beavers on Chilean ecology? A. Therefore, officials decided that there was only one thing to do: eradicate all of the beavers. B. This idea seemed cruel to some people. C. If they are

asked by Kaai97 on January 26, 2016
48. ## Chemistry

What is the unit m^-1? The question I'm working on says "an electron in the hydrogen atom makes a transition from an energy state of principal quantum number nt to n=1. If the photon emitted has a wavelength of 95 nm, what is the value of nt? I was trying

asked by Quinn on November 17, 2015
49. ## Calculus

a)The curve with equation: 2y^3 + y^2 - y^5 = x^4 - 2x^3 + x^2 has been linked to a bouncing wagon. Use a computer algebra system to graph this curve and discover why. b)At how many points does this curve have horizontal tangent lines? Find the

asked by Chelsea on October 31, 2010
50. ## Finance

You want to withdraw \$39,944 from your account that the end of one year and \$24,608 at the end of the second year. How much should you deposit in your account today so that you can make these withdrawals? Your account pays 15 percent p.a. Answer:

asked by TaylorB on October 12, 2014
51. ## Physics

A hot-air balloon is rising upward with a constant speed of 2.27 m/s. When the balloon is 9.14 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground? I solve

asked by Shawn on September 10, 2013
52. ## homework

ranslate the following situation into an inequality. Do not solve. “Charlie would like to pack one less outfit than Jane for their trip. Loretta would like to bring five outfits less than twice what Jane packs. Due to space in the suitcase, they are

asked by chuck on August 30, 2011
53. ## Physics

The center of a 1.50 diameter spherical pocket of oil is 1.20 beneath the Earth's surface. Estimate by what percentage directly above the pocket of oil would differ from the expected value of for a uniform Earth? Assume the density of oil is 800 kg/m^3.

asked by Mandy on March 17, 2011
54. ## Physics

A 10 kg mass is hung from 2 light, inextensible strings such that the vertical string is attached to the top of the block at an angle 60 degree and the other string is attached straight horizontally to the adjacent side of the mass. How do we solve the

asked by Nisha on March 25, 2017
55. ## math,correction,plz

Solve each of the following quadratic equations by completing the square. Problem#22 sect. 10.2 x^2-6x-3=0 My answer I keep getting two different answers : I get these two everytime i do it differently. I get : x= 3 +- radical(12) or x = 3+-2radical(3)

asked by jas20 on March 11, 2007
56. ## Math

A family is building a circular fountain in the backyard. The yard is rectangle and measures 14x by 19x and the fountain is going to be circular with a radius of 6x. Once the fountain is built, what will be the area of the remaining yard? Please do help I

asked by Neko on April 12, 2016
57. ## physics

Find the magnitude and direction of a)the resultant b)the equilibrant of two forces 10N acting in the direction N030'E and 15N acting in the eastern direction if boths forces act at a point. Please solve nd give the details especially the B parts of the

asked by pete onoriode on March 31, 2011
58. ## Calculus

Given the table below for selected values of f(x), use 6 right rectangles to estimate the value of the integral from 1 to 10 of f(x)dx. Table: 1 3 4 6 7 9 10 4 8 6 10 10 12 16 The only problem I'm having with this is figuring out the values of f(2.5),

asked by Harry on April 4, 2018
59. ## Math Gr 11

"A rock is dropped from the edge of a 180 m cliff. the function f(x) = -5t^2 - 5t + 180 gives the height of the rock, h(t), in meters t seconds after it was released. How long does it take for the rock to reach a ledge 80 m above the base of the cliff?" I

asked by Emily on June 20, 2013
60. ## Physics

I've been trying to solve this problem for the longest time, but I still can't get the answer. The answer is apparently 36 degrees below the horizontal. Please explain!! (: A missile is launched from the ground with a speed of 100 m/s at an angle of 45

asked by Student on December 7, 2013
61. ## Physics

The center of a 1.50 diameter spherical pocket of oil is 1.20 beneath the Earth's surface. Estimate by what percentage directly above the pocket of oil would differ from the expected value of for a uniform Earth? Assume the density of oil is 800 kg/m^3.

asked by Mandy on March 18, 2011

solve the following problems using pictures, number or words. At president's inaguration in 1861, the newpaper headlines stated there were about 30,000 people in attendance. If the newpaper rounded to the nearest thousand, what is the largest number and

asked by Mythreyee on August 30, 2016
63. ## physics

The last car unfastens from a moving train. The train continues to move at the same constant speed. What is the ratio of the paths covered by the train and car up to the moment of the car’s stop? Assume that the car decelerates uniformly. Solve this

asked by Anonymous on August 17, 2011
64. ## physics

Please help me solve !!! Water flows into a swimming pool at the rate of 9.83 gal/min. If the pool dimensions are 33.4 ft wide, 44.9 ft long and 19.9 ft deep, how long does it take to fill the pool? (1 gallon = 231 cubic inches) Answer in units of min

asked by Kaleigh on January 20, 2012

Inverse Trigonometric Functions please explain this to me in mathematical steps please how to solve sin^(-1) (-1/2) this equals - pi/6 i know that sin^(-1) domain and range switch from original sin but i don't know how to apply that... i need an

asked by Amy~ on April 14, 2011
66. ## math

Solve the problem. Make sure your answer is in simplest form and improper fractions are expressed as mixed numbers. A baker used packages of raisins when he was making muffins. Each package contained pounds of raisins. How many pounds of raisins did the

asked by diego on October 19, 2015
67. ## math

I need help with parametric equations, locus problems, tell me how to solve all questions if you can. Need help with one below: Tangents are drawn to a parabola x^2=4y from an external point A(x1,y1) touching the parabola at P and Q (a) Prove that the mid

asked by chris on November 1, 2010
68. ## Word Problem, math.

A police car traveling 100 ft/sec is chasing a car being driven erratically at 75 ft/sec. If the police car is 300 feet behind the other vehicle when the chase began, about how many seconds will it take to catch the erratic driver? I think I know how to

asked by Arie on September 5, 2010
69. ## Math

I am having trouble on this question. a cable TV company charges \$24.95 per month for basic service and \$6.95 per month for each premium channel. a customer's bill for one month is \$45.80. write and solve an equation to find the number of premium chnnels

asked by Katie on May 9, 2013
70. ## Algebra 2

Evaluate this pricewise function at x=-4 and x=4. f(x)={x^2, if x less than or equal to -4 {x^3, if -4 less than x less than or equal to1 {square root x, if x greater than 1 (I wanted to use symbols but I didn't have the greater than or less than equal to

asked by Petter on September 20, 2017
71. ## algebra

determine the nature of the solutions of the equation, one real solution, two real solutions, or two non-real solutions. x^2-20x+100=0

asked by sam on July 11, 2010
72. ## Chemistry

How would you prepare a 25.0% water in ethyl alcohol solution using 100.0 ml of ethyl alcohol (The density of ethyl alcohol is 0.7893 g/ml)

asked by Hunter on August 24, 2012
73. ## Science

A 50.0ml of volume silver nitrate solution contains 0.0285 moles of silver nitrate, what is the molarity of silver nitrate

asked by Peter on March 4, 2018
74. ## physics

I do not understand the answer that was given to me on a post dated Nov. 23. Please help explain my questions that appear at the end of this post. Bart ------------------- Posted by Bart on Wednesday, November 23, 2011 at 6:52am. A baseball is hit with a

asked by Bart on December 4, 2011
75. ## history

Im having trouble finding about the people of the indus valley, which was in acient india. I need to make up a person, that would have lived there. I need to make up the persons name a job that was acuarate to that time and place there age work or job

asked by lizzie on November 12, 2006
76. ## Algebra

For the following equation, state the value of the discriminant and then describe the nature of the solutions. -7x^2+3x-4=0 What is the value of the disriminant? Does the equation have two imaginary solutions, two real solutions, or one real solution?

asked by Sam on March 2, 2009
77. ## Chemistry

Vinegar is a dilute solution of acetic acid. What is the concentration of acetic acid in the vinegar if 26.5 mL of NaOH at 0.250 M are required to neutralize 10.0 mL of vinegar?

asked by Claudia on July 5, 2011
78. ## chemistry

Volume of distilled water used 12.09 mL Volume of HCl added 0.87 mL Concentration of added HCl 1.979 M pH of diluted HCl solution ___________________

asked by faruk on July 30, 2013
79. ## chemistry

4. Vinegar is a dilute solution of acetic acid. What is the concentration of acetic acid in the vinegar if 26.5 mL of NaOH at 0.250 M are required to neutralize 10.0 mL of vinegar?

asked by cindy on May 3, 2011
80. ## Acidity of different concentrations

Does the molar concentration (mol/L) of an acidic solution affect its pH value? - For example 0.3 mol/L of acetic acid will have a higher pH value than that of 7 mol/L of acetic acid. Correct?

asked by Yassol on February 3, 2015
81. ## chemistry

Calculate the pH of a [Acid] M aqueous solution of each of the hydrochloric and acetic acids: Acid [Acid] pH HCl 0.10 HC2H3O2 0.10 I know that HCl is just -log(0.10) which is 1, but can't get the pH of HC2H3O2.

asked by Renee on May 4, 2008
82. ## chemistry

A certain liquid has vapor pressures of 50 Torr. 1 mol of an involatile solute is dissolved in 1 mol of this liquid. What is the vapor pressure of the liquid above this solution?

asked by joey on March 19, 2012
83. ## chemistry

What mass of water must be added to 0.5 mol of glucose to make a solution of 25 percent by mass?The molar mass of glucose is 180 g/mol.

asked by student on January 22, 2012
84. ## Gravity, fields

Question 1) Consider two point-like objects, A and B, the first of which has four times the mass of the other (i.e. MA = 4MB). They are placed a certain distance d apart. (i) Sketch (in 2-dimensions) the gravitational field lines that are present in the

asked by Anon on December 13, 2017
85. ## chem

the element nitrogen and magnesium react to give magnesium nitride according to the balanced equation N2 + 3Mg = Mg3N2 suppose you have 0.3616 mol of n2 1-how many moles of mg are needed for complete reaction? 2-what mass of Mg3N2, in grams can be

asked by burrprett on September 27, 2011
86. ## algebra-det.

a) Suppose that B is an n ¡Á n matrix, and k is a scalar. Give a formula for det (kB) in terms of det B . b) Show that your formula from (a) is true for all n and for any k. det (kB) = k^n det B This is because the determinant is a multilinear function

asked by Vidal on June 10, 2007
87. ## biology help plz?????????????????

the mRNA squence below is shown along with the polypeptide which would be produced when it is translated .what polypeptide would be produced if the fifth base in the mRNA sequence shown had been changed to A as result of a mutation in the DNA from which

asked by centya on February 2, 2013
88. ## Chemistry Help.......

State the Le Chatelier's principle and explain the following i) The effect that incresing the pressure will have on the eaualibrium yield of methanol ii) The effect of increasing the temperature will have on the equalibrium yeild of methanol iii) The

asked by Lacey on March 12, 2007
89. ## math, calculus

Interference Two identical tuning forks are struck, one a fraction of a second after the other. The sounds produced are modeled by f1(t) = C sin ωt and f2(t) = C sin(ωt + α). The two sound waves interfere to produce a single sound modeled by the sum of

asked by MaryJane on June 22, 2018
90. ## algebra

Your research the average cost of whole milk for several years to look for trends.the table show your data what is the equation for a line of best fit how much would you expect to pay for a gallon of milk in the year Year 1998-2000-2002-2004-2006-2008 Cost

asked by snow on March 13, 2014
91. ## Science

Hey people! So, uh, I'm trying to take an assessment in online school... long story short, I don't know what the heck I'm doing (like everyone else on here). So can you guys help me out? Here are some of the questions that stumped me: 1. Where can most

asked by Emma on March 5, 2019
92. ## Physics

At the local swimming pool, the diving board is elevated h = 7.5 m above the pool surface and overhangs the pool edge by L = 2 m. A diver runs horizontally along the diving board with a speed of v0 = 3.4 m/s and then falls into the pool. Neglect air

asked by Lauren HELP on September 11, 2014
93. ## Physics

The Voyager 1 spacecraft is at the edge of the solar system, about 11 billion km away. (a) How long does a radio signal from Voyager 1 take to get to the Earth? (b) Its radio works at 8 GHz. What is the wavelength? (c) What type of light is this? (d)

asked by Kimia on May 10, 2017
94. ## solving trigonometrical equations

arctan(tan(2pi/3) thanks. arctan(tan(2pi/3) = -pi/3 since arctan and tan are inverse operations, the solution would be 2pi/3 the number of solutions to arctan(x) is infinite, look at its graph. generally, unless a general solution is asked for, or a domain

asked by Jen on April 10, 2007
95. ## chem

why do we add boiling chips or boiling stones before the distillation starts? Boiling chips should never be added to a hot solution!Why? i don't know what the answer is to the first one, but as for the second i think i have a clue. is it that the boiling

asked by Jason on November 2, 2008
96. ## Chemistry

Write a balanced equation for the reaction between hydrochloric acid and zinc metal. Zinc + hydrochloric acid ==> zinc chloride + hydrogen. These are the reactants and the products. You make it into formulae and balance it. I shall be happy to check your

asked by Chrissy on April 19, 2007
97. ## Chemistry

My teacher gave us the answer to a chemistry problem and i cannot figure out how she got the answer. Can you help me work out this problem so i can better understand it. A gas under an initial pressure of 0.60atm is compressed at a constant temperature

asked by Steven on March 19, 2012
98. ## Repost-Physics 1

A crate of mass 48 kg is pushed up a frictionless ramp by a person as shown in the figure below. Calculate the work done by the person in pushing the crate a distance of 11 m as measured along the ramp. Assume the crate moves at constant velocity. _____J

asked by John on October 9, 2012
99. ## US government

someone please give me some conservative point about taxes. Taxes discourage work and discourage private investment. Taxes assume the government knows best how to spend your money. With tax revenue in hand, governments will spend it, regardless of whether

asked by mike on October 23, 2006
100. ## Algebra

I need to find the volume of a cylinder. Use 3.14 for pi...I think the answer is 24,501.42 m^2...the picture shown is a cylinder with a diameter of 34m and a heigth of 27m I know how to work these problems out and I got 24,501.42m^2 but the computer is

asked by Cassie on February 18, 2013