# 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

91,330 questions, page 711
1. ## math

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

asked by Gina on January 16, 2012
2. ## Math

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

asked by Math1234 on June 7, 2015
3. ## geometry

B is the midpoint of and D is the midpoint of . Solve for x, given BD = 3x + 5 and AE = 4x + 20.

asked by Anonymous on November 18, 2011
4. ## algebra

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

asked by Anonymous on January 15, 2011
5. ## algebra

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

asked by seb on January 3, 2011
6. ## Math 156

how do you solve this -absolute value -5 -(4)absolute value?

asked by Rmz on November 19, 2009
7. ## math

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

asked by dona on October 26, 2010
8. ## kbcc

x-intercept 0.4 y-intercept 0.3 How you solve for 1/f ?

asked by optic lens on October 19, 2014
9. ## algebra

Solve: log x + log(x+15)=2

asked by james on April 11, 2014
10. ## math

25 over 100 = n/100 how do i solve for n?

asked by Devon on December 16, 2008
11. ## math

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

asked by jason on February 19, 2009
12. ## maths

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

asked by kalyani on January 22, 2016
13. ## Calculus

Solve for x if 5+lnx=14/lnx.

asked by Leanna on September 6, 2010
14. ## Algebra II

Solve for x. log x + log 4x = 2

asked by Joy on November 21, 2011
15. ## algebra

Solve for f. 14+12f≥5f+14>12f+7

asked by Dragon Song on September 30, 2018
16. ## Logarithms

log3(x^log3(x)) = 9 How do you solve for x?

asked by Jason N on February 14, 2017
17. ## algebra

Solve: 4 sqrt (x) = 8 + 2 sqrt (x) a) (-4) b) (16) c) none d) (4) c

asked by molly on June 18, 2010
18. ## math

solve log(5)(5x-4) = log(√5)(2-x)

asked by Anonymous on July 20, 2013
19. ## Calculus

solve: 14. ln(1/x) = -2 16. lnx + ln(x+2) = ln(x+6) 22. ln(lnx) = 1

asked by Lauren on September 14, 2009
20. ## Precal/Math

Solve: log(3-2x)-log(x+24)=0

asked by Bobbie on April 23, 2016
21. ## math

Please, help me solve this. logx * log(x/4) = 8

asked by eve on May 6, 2012
22. ## math

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

asked by julie on February 27, 2011
23. ## Equation/Algebra

-2x+5(x+3)=-9 Can someone help me solve this step by step?

asked by Katy on February 19, 2019
24. ## Algebra

how do i solve this? .10=.9(x/15000)+.14(1-x/15000)

asked by Britt on April 17, 2009
25. ## Algebra II

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

asked by Arielle on November 8, 2011
26. ## algebra

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

asked by jack on June 16, 2017
27. ## Math: ALGEBRA

How to solve this??? -1-8(x+12)> -44-8x -4(-12v-9)+6(-6+5v)> -4v+12v

asked by Matt on October 8, 2014
28. ## Algebra

I am racking my brain trying to figure out how to work this: the square root of 55 minus the square root of one over 55 plus the square root of 5 over 11. Do I use conjugates? Ahhhh!

asked by Jeff on April 10, 2011

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
30. ## 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
31. ## Science

The u.s. constitution provides that each of the three branches of the federal government has certain powers that can limit the powers of the other branches. These limitations are known as the system of checks and balances. Which of the following actions is

asked by Mydogbear on May 14, 2017
32. ## physics

Which of the following is correct for the energy levels in an atomic system? Choose one answer. a. The energy value increases with the distance from the nucleus. b. The energy value decreases with the distance from the nucleus. c. The energy value remains

33. ## 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
34. ## 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
35. ## 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
36. ## 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
37. ## 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
38. ## 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
39. ## 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
40. ## 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
41. ## 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
42. ## 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
43. ## 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

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
45. ## 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
46. ## 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
47. ## 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
48. ## 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
49. ## 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
50. ## 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
51. ## 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
52. ## 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
53. ## 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
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. ## 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
56. ## 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
57. ## 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
58. ## 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
59. ## 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
60. ## 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
61. ## 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

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. ## 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
64. ## 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
65. ## 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
66. ## 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
67. ## 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
68. ## 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
69. ## 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
70. ## 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
71. ## 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
72. ## 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
73. ## 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
74. ## 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
75. ## 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
76. ## 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
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. ## Maths calculus

A rectangular box has a square cross-section and the sum of its length and the perimeter of this cross-section is 2 m. If the length of the box is x m, show that its volume V m^3 is given by V = [x(2-x)^2]/16. Hence find the maximum volume of the box.

asked by Stephen on May 24, 2011
79. ## math

A traveler travels on a highway 80 miles at 55 miles per hour, he then travels back on the same highway at 45 miles per hour. What was his average rate of speed. (Hint: it's not 50 miles per hour) If it's not 50, i'm so confused!!! Please help!!! (and

asked by Ashley on December 2, 2009
80. ## Science/misc

If Person A is smarter than Person B why would their teacher say "Person A has more brain than person B" when all human brains are an equal size? (Is it just a saying to show the point?) Also, if all brains are the same size then why are some people

asked by mysterychicken on February 17, 2009
81. ## Algebra1

Sally bought some ordinary pencils and 4 times as many special pencils. Each ordinary pencil cost \$0.20 and each special pencil cost \$0.35. She spent \$14.40. How many of each pencil did she buy? Please show me how you got your answer. Thank you.

asked by Samantha on October 5, 2009
82. ## Math

1. if 60% of 3/5 of a number is 36, then the number is......... Pls show working. 2. the average weight of 16 boys in a class is 50.25kg and that of the remaining 8 boys is 45.15kg. Find the average weight of all the boys in the class.

asked by Bright on April 20, 2015
83. ## Creative Writing

The description moves from the broad category of transportation to a concrete, detailed image. The underlined words show how the image moves from the broadest category to the concrete, detailed image.

asked by Fats on June 30, 2009
84. ## CS programing

Storage: .data 2 0 ; storage for n22 .data 2 0 ; temp storage 23 .data 2 2 ; constant 2 24 .data 2 2 ; const 2 25 0 10 ;const 10 26 please can u show me the correct way to declare a constant using wombat.(CPU sim).

asked by lex on March 20, 2014
85. ## Psychology

Individuals who naturally exhibit low levels of brain arousal and nervous system reactivity are more likely to: A. Score high in measures of agreeableness B. Score low in measures of agreeableness. C. Score low in measures of sensation seeking D. Score

asked by Macy on December 9, 2014
86. ## 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
87. ## 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
88. ## Physics

A mine shaft is known to be 57.8 m deep. If you would drop a rock down the shaft, how long would it take for you to hear the sound of the rock hitting the bottom of the shaft knowing that sound travels at a constant velocity of 345 m/s? The answer is

asked by Alina on October 11, 2010
89. ## Geometry

A gasoline truck is a cylindrical tank(think "sideways" cylinder) that is 20 feet long and 6 feet in diameter. At the end of his work day, the driver measures the depth of gasoline in the tank at 18 inches. How many gallons of gas are in the tank?

asked by Nicholas on April 27, 2017
90. ## Physics

A mine shaft is known to be 57.8 m deep. If you would drop a rock down the shaft, how long would it take for you to hear the sound of the rock hitting the bottom of the shaft knowing that sound travels at a constant velocity of 345 m/s? The answer is

asked by Alina on October 12, 2010
91. ## 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
92. ## STATISTICS HELP

The lifetime of a disk drive head is normally distributed with a population mean of 1000 hours and standard deviation of 120 hours. Determine the probability that the average lifetime for 9 disk drives will exceed 940 hours. Need to see work!

asked by Heather on November 8, 2010
93. ## Geometry

What is the area of a regular pentagon with an apothem 14 inches long and a side 20 inches long? Round the answer to the nearest inch. Answer choices: 1400 in.^2 700 in.^2 175 in.^2 140 in.^2 Give work, not answer, please.

asked by Jake on May 14, 2016
94. ## Physics

A pump is required to lift a mass of 750kg of water per minute from a well of depth 13.2m and eject it with a speed of 17.4m/s. A) How much work is done per minute in lifting the water? B) How much in giving the water the kinetic energy it has when

asked by Garrett on March 17, 2014
95. ## 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
96. ## Another simple math problem (y=mx+b)

Write an equation in slope-intercept form for each line described. (I just need my work checked, thank you!) The slope = 1/2, and the line passes through the point (3, -1) First I used point slope formula y-ysub1 = m(x-xsub1) y+1=1/2(x-3) then, went on to

asked by Mandy on September 3, 2011
97. ## Honors Physics

Emily makes 0.250 kg of hot tea at 99.0°C. How much ice at 0.00°C must she add to the tea so that the mixture reaches a final temp. of 8.00°C? (You may treat the tea as if its water.) My work: (0.25)(4186)(91) + m(4186)(-8)(3.35 ×10^5)=0 My answer:

asked by Physics on June 1, 2015
98. ## Calculus

A right triangle has one leg on the x-axis. The vertex at the right end of that leg is at the point (3,0). The other vertex touches the graph os y=e^x. the entire triangle is to lie in the first quadrant. Find the maximum area of this triangle.Justify your

asked by Amanda E. on February 9, 2011
99. ## 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
100. ## world history

what is the distance the Chinese explorers taveleed to reach the eastern coast of Africa. And how does it compare to Prine Henry's? You can work that out from this site. www.worldatlas.com/ Figure the distance from China to Africa, then figure the distance

asked by danielle on December 2, 2006