# 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 534
1. ## maths -quadratic eqn

one of the roots of the quadratic equation x^2-(4+k)x+12=0 fine, 1)the roots of the equation 2)the possible values of k please show your workings thanks in advance.

asked by p1 on March 14, 2016
2. ## Maths

Show that the points (20°N,20°E) and (60°N,160°W) lie on the same great circle.Find their great circle distance apart.

asked by Gbotty on January 11, 2017
3. ## Math

The Distributive Property: Find the product mentally. Show the steps you used. 8*34 I know that 8*34=272 but how you do it with Distributive Property? Thanks!

asked by Joel on January 28, 2016
4. ## Math;);)

Show that there are at least two ways to calculate the angle formed by the vectors [cos 19, sin 19] and [cos 54, sin 54].

asked by Anonymous on January 4, 2017
5. ## Calculus

I am sorry. I am really struggling with limits. I am not sure of an answer for this problem either: Show an example that the limit as x goes to a f(x) goes to [f(x)+g(x)] may exist even though neither the limit as x goes to a f(x) approaches f(x) or g(x)

asked by John on September 18, 2010
6. ## Mathematics

The sum of the geometric progression a,ar,ar^2,ar^n-1 is S the product of these n term s is P. Find R,the sum of the reciprocals of these n term s and show that (S/R)^n=P^2

asked by Anonymous on July 19, 2018
7. ## math

There are18 colour pages in a magazine, which is equal to 2(over)5 of the book. how many pages are there in the whole book? Please show the steps. thanks

asked by vanessa on January 10, 2010
8. ## geometry

show that minute hand gains five degree thirty minutes on hour hand in one minute

asked by ajit yadav on April 26, 2013
9. ## math URGENT!!

the midpoints of the sides of a triangle are (1,1),(4,3),and (3,5). find the area of the triangle. please answer and show how u did it step by step please!!!!

asked by dan on October 25, 2012
10. ## math

A set M=(1,2,......100) is divided into seven subsets with no number in 2 or more subsets. Show that at least one subset either contains four numbers a,b,c, and d such that a+b = c+d or three number p,q and r such that p+q=2r

asked by Anonymous on August 26, 2018
11. ## hellppp

an assortment of coins contains 20 pennies, 2 nickels and 6 dimes. what percentage of the coins are nickels? show how is solved ?????????

asked by Anonymous on September 13, 2011
12. ## math

A set M=(1,2,......100) is divided into seven subsets with no number in 2 or more subsets. Show that at least one subset either contains four numbers a,b,c, and d such that a+b = c+d or three number p,q and r such that p+q=2r

asked by Anonymous on August 30, 2018
13. ## maths-equadratic eqn

one of the roots of the quadratic equation x^2-(4+k)x+12=0 find, 1)the roots of the equation 2)the possible values of k please show your workings thanks in advance.

asked by p1 on March 14, 2016
14. ## maths

If the roots of the eqn 1/(x+p) + 1/(x+p) = 1/r are equal in magnitude but opposite in sign, show that p+r=2r and that the product of the roots is equal to (-1/2) (p²+q²)

asked by tanu on July 5, 2014
15. ## math

A set M=(1,2,......100) is divided into seven subsets with no number in 2 or more subsets. Show that at least one subset either contains four numbers a,b,c, and d such that a+b = c+d or three number p,q and r such that p+q=2r

asked by Anonymous on August 30, 2018
16. ## Algebra 1

Find the y-intercept of the two coordinates ( 2, -5) and ( 6, 3). Please help me with this question and please explain to me and show me how to find Each step to solving the y- intercept. Thank you 😄

asked by Lucy on November 3, 2013
17. ## GEOMETRY

Which of the following is NOT a way you can show that triangles are similar? A.AAA similarity B.SAS similarity C.SSA similarity D.SSS similarity

asked by Superman on July 12, 2010
18. ## Geometry/Trig

A plane is flying and show an air speed of 130 mi/h. However, there is a 20 mi/hr crosswind. What is the resulting speed of the plane.

asked by Anna on March 3, 2014
19. ## Math

a.) Given that f(3)=5 and f'(x)=x/((x^3)+3), find the linear approximation of f(x) at x=3. b.)If the linear approximation is used to estimate the value of f(2.9), will it be an overestimation or underestimation? Show justification.

asked by Devin on March 16, 2012
20. ## geometry

Find the perimeter and area of a right triangle if one leg measures 24 ft. and the other leg measures 70 ft. Please show the steps so I can do the next one. Thanks

asked by allen on March 5, 2011
21. ## math

Rebecca rolls two number cubes each with sides that are labeled 1 to 6. What is the probability that both number cubes show a 1?

asked by Anonymous on March 22, 2016
22. ## geometry

Find the perimeter and area of a right triangle if one leg measures 24 ft. and the other leg measures 70 ft. Please show the steps so I can do the next one. Thanks

asked by allen on March 5, 2011
23. ## geometry

Which of the following is NOT a way you can show that triangles are similar? A.AAA similarity B.SAS similarity C.SSA similarity D.SSS similarity

asked by Gery- help! on July 8, 2010
24. ## Algebra

If the first and the last terms of an arithmetic series are 10 and 62, show that the sum of the series varies directly as the number of terms

asked by Anonymous on February 7, 2017
25. ## Math

Let k be a positive integer and p a prime number. Show that if p^2 is a factor of k, but p^3 is not a factor of k, this implies that k^(1/3) is not a rational number. Regards

asked by David Vader Smith Wise Brown on October 17, 2011
26. ## Calculus

a.) Given that f(3)=5 and f'(x)=x/((x^3)+3), find the linear approximation of f(x) at x=3. b.)If the linear approximation is used to estimate the value of f(2.9), will it be an overestimation or underestimation? Show justification

asked by Devin on March 16, 2012
27. ## Math

How do I show a decimal answer for this: 2-1/4 cups of flour make 12 biscuits; how much flour is needed for 24 biscuits?

asked by Brooklin on March 17, 2016
28. ## geometry

Carlos want to show a rectangle in his drawing. What dotes he have to do to the drawing below to make the rectangle a closed shape?

asked by Ms.Vargas on March 18, 2013
29. ## Maths

Muhhamad says my number has 6 tens.the ones digit less then ten digit.what could mahhamad number be show all possibilites.

asked by Ryna on September 24, 2016
30. ## Maths

When the first n positive integers are added together, their sum is given by 1/2n(n+1) Find the value of n for which the sum is 105.. Can you show me a step by step please?

asked by Remy on September 20, 2009
31. ## Algebra

Divide: (y^2-y+4) divide by (y+3) I worked it out, but don't know how to put my answer can you please do it too and show me what the answer is. I used long division.

asked by Kaashif on April 13, 2016
32. ## physics

If a person is thrown to a maximum height of 26.0 ft above show calculations for _______ s (time below 13.0 ft) _______ s (time above 13.0 ft)

asked by ddd on October 2, 2013
33. ## Calculus

What would the limit be for the following problems? lim (square root (x+3)) x--> 1 I thought it would be 1.4 lim (1/x) x--> 7 I thought it would be 0 or .1 but neither of those show to be correct. Thank you!

asked by Serena on August 22, 2015
34. ## Math

from 10 meters of wire, 3/4 meter was cut.How many meters of wire were left?Show your answer by using an illustration

asked by MJ on September 29, 2016
35. ## Algebra

Can someone show me how to Simplify the radical expression. square root 363 - 3 square root 27 (in steps please)

asked by GummyBears16 on April 8, 2016
36. ## math

show that the equation x^2+2xy+y^2+x+y-2=0 rebresent two paralil straight lines and find the equation of those two lines

asked by Anonymous on June 6, 2011
37. ## chemistry

metals with 8-hydroxyquinoline, C9H7NO. After weighing the mixed precipitate, the precipitate is dissolved and the amount of 8-hydroxyquinoline determined by another method. In a typical analysis, a 127.3 mg sample of an alloy containing iron, manganese,

asked by Anonymous on March 29, 2017
38. ## economics

Assume that the capital account is equal to zero. Net unilateral transfers 150 Exports of goods and services 7500 Net increase in United States government’s nonreserve foreign assists -130 Net increase in foreign ownership of United States based

asked by lynn on June 9, 2010
39. ## Accounting/Financing

I am so weak at this new class I started no matter how many times I read my textbook, I cannot understand how to calculate ratios can someone please show me or guide me how to work these problems, I would really appreciate it, thank you please help me..

asked by Anna on February 25, 2010
40. ## Physics

Sitting on a horizontal track is a mass of 10kg. One end of the track is raised untill the mass just begins to slip. If the coeffieient of static friction is .4 what is the minimum angle at which the mass begins to slip? The component of force down the

asked by Jason on August 22, 2006
41. ## CHEMISTRY...

1. Balance the reaction below, then use it to answer the following questions. C2H2(g)+O2(g)-->CO2(g)+H2O(l) a) How many grams of oxygen are needed to make 4.84 moles of water? Is the correct answer 387 grams of O2? b) How many grams of water will be

asked by Anonymous on January 13, 2013
42. ## Java Programming

Hey! Thanks for checking my question out! ____ 10. If x is a sorted array of int values, which of the following shows a call to a method of the Arrays class that will determine if the value 7 exists in the array? (1 point) a) int loc =

asked by Da Fash on November 8, 2017
43. ## Physics

Hi! Would one of you please check my work? Thanks! ( I used significant digits, by the way) A student throws a 5.00 kg steel shot directly upwards so that it leaves his hand when it is 2.00 m above the ground. If its velocity is 0.15 m/s when it leaves his

asked by Lucina on December 29, 2014
44. ## Math

On the six tests in her social studies course, Jerelyn's score were 92, 78, 86, 92, 95, and 91. Determine the median and the mode of her scores. If Jerelyn took a seventh test and raised the mean of her scores exactly 1 point, what was her score on the

asked by JAsmine on September 13, 2008
45. ## Algebra I

Question:The number of students on the football team is two more than three times the number of students on the basketball team. If the basketball team has Y students, write a variable expression for the number of students on the football team. a)3y b)3y-2

asked by M on November 1, 2006
46. ## English

Why does Douglass state that “education and slavery were incompatible with each other”? There wasn’t time for slaves to go to school; they had too much work to do Being educated meant that slaves might question their existence and try to escape

asked by Kayla on December 10, 2015
47. ## physics

A string going over a massless frictionless pulley connects two blocks of masses 4.4 kg and 11 kg. As shown on the picture below, the 4.4 kg block lies on a 23◦ incline; the coefficient of kinetic friction between the block and the incline is μ = 0.29.

asked by Sarah on March 6, 2014
48. ## finance

Johnson Ltd a manufacturer of office equipment is considering purchasing a new machine for \$2,000,000. The company is expecting an annual cash inflow of \$1,220,000 from the sale of the products and an annual cash outflow of \$350,000 for each of the six

asked by anonymous on July 9, 2019
49. ## ethics

The rising number of uninsured patients has led to an increased reliance on the hospital emergency room for routine non-emergency care. The EMTALA is an example of a law that impacts who must be seen when presenting to the emergency room seeking care. How

asked by Niki on February 2, 2010
50. ## math

1.Transform the graph of f(x) = 3^x to sketch g(x) = 3^-(x+1) -2. Show table of values and each transformation clearly. 2.Write two equations to represent the same exponential function with a y-intercept of 5 and an asymptote at y = 3. Investigate whether

asked by kk on March 15, 2012
51. ## math

1.Transform the graph of f(x) = 3^x to sketch g(x) = 3^-(x+1) -2. Show table of values and each transformation clearly. 2.Write two equations to represent the same exponential function with a y-intercept of 5 and an asymptote at y = 3. Investigate whether

asked by kk on March 15, 2012
52. ## english

Punctuate the sentences and underline the explanatory words. Use the editing guide below. 19 mistakes heath i want to show you how to change a flat tire said dad youll be old enough to drive soon and this is a skill youll need to know you don't want to be

asked by stephanie on December 7, 2011
53. ## math

Sorry i could not understand log. Could you explain it in simpler terms? I am in class 7. The question was if a sum of money doubles in 8 yrs, in how many years will it triple itself?Is the answer 16? If it is please tell me how to show the workings. I

asked by Susan on September 2, 2010
54. ## Help plz on Calc

The portion of the ellipse x^2/9+y^2/4=1 with x greater than or equals to 0 is rotated about the y-axis to form a solid S. A hole of radius 1 is drilled through the center of S, along the y-axis. Find the exact volume of the part of S that remains. Show

asked by Linda on May 6, 2015
55. ## Social studies (Help)

Why did Thomas Paine’s write the pamphlet, “Common Sense"? To support conquering the native Americans •• To argue that more land should go to France and Spain To show that loyalty to the monarchy was wrong To pledge his loyalty to the British

asked by Lopez Marcos on September 27, 2016
56. ## chemistry

suppose 5.00g of sodium carbonate reacts completely with excess of hydrochloric acid. Show how to calculate the mass (g) of sodium chloride that would be formed. Na2CO3 + 2HCl = 2NaCl + CO2 + H2O What is the limiting reagent?

asked by stephanie on July 21, 2011
57. ## algebra 1

The cheerleaders are making buttons for homecoming. They are printing paper circles with a diameter of 3 inches that will be folded over a metal backing and covered with clear plastic. If a 1/2 inch border is folded over, how much of the picture will show

asked by mike on January 28, 2014
58. ## calculus 1 (I need help)

The portion of the ellipse x^2/9+y^2/4=1 with x greater than or equals to 0 is rotated about the y-axis to form a solid S. A hole of radius 1 is drilled through the center of S, along the y-axis. Find the exact volume of the part of S that remains. Show

asked by linda on May 6, 2015
59. ## Algebra

A rain gutter is made from sheets of aluminum that are 11 inches wide. As shown in the figure the edges are turned up to form right angles. Determine the depth of the gutter that will allow a cross-sectional area of 10 in.². Show that there are two

asked by Katy on September 11, 2017
60. ## Calculus

Find the volume of the solid whose base is the region in the xy-plane bounded by the given curves and whose cross-sections perpendicular to the x-axis are (a) squares, (b) semicircles, and (c) equilater triangles. y=x^2, x=0, x=2, y=0 I know how to graph

asked by Anonymous on December 15, 2007
61. ## Trig

Please help. I can't get this problem at all. When two bubbles cling together in midair their common surface is part of a sphere whose center D lies on the line passing through the centers of the bubble. Also, angles ACB and ACD are 60 degrees. Show that

asked by HELP on March 5, 2012
62. ## com 155

Use at least five adverbs and five adjectives to write a brief review of a movie, sporting event, musical performance, or television show. · Bold each adverb. · Underline each adjective. · Compare the event to one or more similar events. When comparing,

asked by mina on July 28, 2010
63. ## axia college

• Use at least five adverbs and five adjectives to write a brief review of a movie, sporting event, musical performance, or television show. • Bold each adverb. • Underline each adjective. Compare the event to one or more similar events. When

asked by tammy on August 8, 2010
64. ## math

Henry Devine bought a new dishwasher for 320. He paid 20 down and made 10 monthly payments of 34. What actual yearly interest rate did Henry pay? using this formula r=2mI/p(n+1) i got this r=2(12)(20)/300(10+1)= but i don't know what to do next . can you

asked by joe on May 31, 2009
65. ## math

When a pilot banks an aircraft moving at a speed, v, in metres per second, at an angle a, the radius of the turn that results is given by the formula: r = v^2/g * tan(pi/2 - a) where g is the accelatation due to gravity, or 9.8 m/s^2. Use an appropriate

asked by Anonymous on November 6, 2009
66. ## Science

A patient complains of constantly desiring food and water, then having to urinate frequently. Tests show normal ADH levels. These symptoms suggest A. diabetes insipidus. C. diabetes mellitus. B. Cushing’s syndrome. D. panhypopituitarism. C

asked by Tyra on April 23, 2009
67. ## More health

What qualities are important in a close friend 1.agrees with you on everything you say to show loyalty 2.emphathizes by showing care and sensitivity to your feelings*** 3.displays honesty only when they have good things to say so they don’t hurt ur

asked by Szahara on November 7, 2017
68. ## Literature

'Explain why it is important for you to be able to say what you think. Include details that show how people form their opinions. Support your ideas with examples from 'Darkness At Noon' by Harold Krents and 'Homeless' by Anna Quindlen.' I reallyyy need

asked by mysterychicken on December 29, 2009
69. ## Math 9 help

The local theater in Jamie's home town has a maximum capacity of 160 people. Jamie shared with Venus the following graph and said that the shaded region represented all the possible combinations of adult and child tickets that could be sold for one show

asked by Anonymous on December 16, 2013
70. ## Pre-Algebra

At a halftime show a marching band marched in formation. The lead drummer started at a point with coordinates (-2,-5) and moved three steps up and 1 step right. Write a rule to describe the translation. What were the coordinates of the drummers final

asked by Drew on September 28, 2015
71. ## History

What are some aspects of the modern American political party system that began during the Jackson era? A.beginnings of political action committees and fundraising B.widespread campaigns for the popular vote, including fliers, slogans, and songs C.of

asked by Sierra on November 10, 2014
72. ## Fundamentals of Law

Assignment Type: Individual Project Deliverable Length: 1-2 pages Points Possible: 130 Due Date: 8/1/2010 11:59:59 PM CT Your sister has come up with what she thinks is a brilliant idea for a home-based business - a website which helps lonely people find

asked by Jennifer on July 28, 2010
73. ## Science

Why is California’s high-speed rail such a groundbreaking effort? Why will it take so long to complete the high-speed rail route? Should other states wait to see if the high-speed rail system works well before starting their own plans for similar

asked by Anonymous on December 7, 2018
74. ## Chemistry

What is the molar concentration of sodium in a 200ml solution prepared from 1.223g of sodium phosphate?

asked by Danielle on June 26, 2012
75. ## Chemistry

What is the pH of a solution resulting from the addition of 10.0 mL of 0.17 M HCl to 50.0 mL of 0.16 M NH3? Assume the volumes are additive. Kb of NH3 = 1.8 ✕ 10-5.

asked by John on November 18, 2015
76. ## ap chemistry

What volume of 6.58 M HNO3 is required to prepare 671 mL of a 2.7 M HNO3 solution? Answer in units of mL

asked by cheri on September 13, 2012
77. ## Chemistry

The solubility product of Fe(OH)3 is 8.0x10^-40. Calculate its solubility at 35 degrees Celsius in a saturated solution.

asked by Suha on January 2, 2011
78. ## chemistry

What mass of MgSO4 · 7 H2O is required to prepare 300 mL of a 0.511 M MgSO4 solution?

asked by Anonymous on August 22, 2011
79. ## Algebra 1

find slope 2x-20y+18=0 I've been braking my head and I just can't find the solution. Can you please help me. I would really appreciate your help. Thank you so very much. I now it's m= something, but I don't know what the answer is. Thanks, again!

asked by Esther on January 2, 2011
80. ## Hydromaint, Inc businees activity model

does anyone out there have the password for solution #18 for the year 6 tax return or for requirement #21 for the year 7 financial stmts?

asked by Anonymous on April 16, 2007
81. ## Chemistry

What is the pH of a solution that is 0.40 M in sulfurous acid (H2SO3) and )0.22 M in sodium sulfite (NaHSO3-)? Ka (H2SO3) = 1.3x10-2

asked by Nana on April 10, 2011
82. ## Science

In a solution of 7.8 g of benzene (C6H6)and 46.0g toluene (C6H5CH3) is mixed together then,the molecular fraction of benzene is:

asked by Sejal on June 25, 2018
83. ## Find the solution to the system of equations:

Are my answers correct? x-2y+z=1 y+2z=2 x+y+3z=3 Solution : 100 010 001 x = 0.429 y = 0.429 z = 0.714

asked by nagano on November 23, 2016
84. ## Chemistry

To prepare 100g of 19.7% by weight solution of NaOH.how many grams each of NaOH and H2O are needed?

asked by akhmal on June 21, 2014
85. ## Algebra 1

find slope 2x-20y+18=0 I've been braking my head and I just can't find the solution. Can you please help me. I would really appreciate your help. Thank you so very much. I now it's m= something, but I don't know what the answer is. Thanks, again!

asked by Esther on January 2, 2011
86. ## chemistry

What is the concentration (in M) of H+ present in the solution formed by mixing 20 mL of 0.100 M HCl and 10.0 mL of 0.500 M HCl

asked by Norm on August 2, 2009
87. ## Chemistry

The pH of a 1 .00 x 10-2 M solution of cyanic acid(HOCN) is 2.77 at 25 degrees. Calculate Ka and pKa for HOCN from this result.

asked by Annie on March 11, 2013
88. ## Algebra 1

find slope 2x-20y+18=0 I've been braking my head and I just can't find the solution. Can you please help me. I would really appreciate your help. Thank you so very much. I now it's m= something, but I don't know what the answer is. Thanks, again!

asked by Esther on January 2, 2011
89. ## AP Chemistry

What mass of silver nitrate (AgNO3) is required to prepare 400 g of a 3.50% solution of AgNO3

asked by Yolanda on October 3, 2011
90. ## Chemistry

what is the percent by mass of NaCHO3 in a solution containing 12g NaCHO3, dissolved in 450mL of water?

asked by John on March 3, 2013
91. ## chemistry

find the molality of a salt-water solution containing 0.27 mol NaCl in 150 g water.

asked by Catherine on April 7, 2013
92. ## PreCal

express in form a+bi (1+2sqrt3)(2-3sqrt-3) so I came up with 2-3i sqrt3 + 4sqrt3 - 18i Is that solution a+bi form

asked by Terri on November 10, 2013
93. ## math

25% of water is evaporated from containing 150 gm of common salt, the % of salt in remaining solution is increased by how much?

asked by anoop on July 31, 2017
94. ## Chemistry

One liter of 70% alcohol is needed. How much 95% alcohol is required to make the 70% solution. And thank you for last question and any future ones.

asked by Jessi on March 24, 2009
95. ## Algebra

Write a quadratic equation in the variable X. Write in standard form: ax^2+bx+c=0 using 3 as the only solution. Cheers!

asked by Angela on May 1, 2012
96. ## Math 8R - Homework Help!: Part 1

Part 1: Fill in the definitions I need the definitions for the following words: solution evaluate inverse operations

asked by Laruen on October 29, 2012
97. ## Math

Having a brain freeze and can’t get this one. Write a number equation that has a solution of 6. Explain how you wrote the equation.

asked by Cherie on June 7, 2019
98. ## Math

Find Solution set of underrootx=6x.here under root x means positive square root of x.

asked by ABC on May 19, 2017
99. ## chem

Calculate the ph of a buffer solution that is 0.10M in ammonia and 0.15M in ammonium chloride .kb for ammonia is 1.8*10^-5

asked by lina on May 12, 2010
100. ## glgmnhs

An arc of a cirle measure 30°.if the radius is 5cm,what is the length of the arc? Give the solution.

asked by rhachelle cortez on October 14, 2015