# 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 518
1. ## precalculus

Solve 8sin(pi/4x) = 6 for the four smallest positive solutions Give your answers accurate to at least two decimal places, as a list separated by commas.

asked by Anonymous on April 7, 2013
2. ## Algebra, help + check please

Find the percent, round if nessacary: 1) 3 dollar tip for a 18.70 Taxi Fare. So 3 x 18 Correct? Or how would I even solve this problem? Thanks for helping -Allyson

asked by Allyson on October 25, 2010
3. ## precalculus

Solve 5 cos(3 x) = 2 for the smallest three positive solutions. Give your answers accurate to at least two decimal places, as a list separated by commas

asked by Anonymous on April 7, 2013
4. ## Math (Algebra)

3 robots go out to lunch. They decide to share the \$11.91 bill evenly. How much does each robot pay? Equation: 3x = 11.91 #1. What does x represent? #2. Solve for x. #3. Answer the question.

asked by Sydney on May 6, 2013
5. ## GROWTHandDECAY

Can someone give me a growth and decay word problem solve it and explain how you arrive at the final answer in a way I understand it. Thanks ahead of time.

asked by TOTALLY lost on March 13, 2012
6. ## Math (Algebra)

The Problem is that 3 people go to lunch. They decide to share the \$12 bill evenly. How much does each person pay? The Equation is 3x=12 #1. What is the value of x? #2. Solve for x #3. Answer the question.

asked by Sydney on May 6, 2013
7. ## precal

Solve the given equation. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to two decimal places where appropriate.) tan θ = 1

asked by stellar on October 22, 2011
8. ## Math

1.The are of a triangle is A=1/2bh. where A is the area, b is the base,h is height. Which of the following correctly expresses b in the terms of the other quantities? A. B=2AH B. B=H/2A C. B=2H/A D. B= 2A/H Why would that answer be correct. SOLVE.

asked by Sherkyra845 on November 1, 2010
9. ## Math

x^3-6x^2+17x Find the point of inflection of the graph of the function? x,y ( , ) I tried to solve for it by getting the 1st derivative and setting it equal to 0 but i get sqrt,so am confused!

asked by Angelina on March 12, 2012
10. ## MATH FINANCE

Find the monthly payments for an ordinary annuity that will yield a future value of \$80000 at 9 1/2% interest for 38 years. I DON'T KNOW HOW TO SOLVE THIS PROBLEM CAN SOME ONE HELP ME???

asked by COURTNEY on September 29, 2010
11. ## Math 8R - HELP!

Simplifying Algebraic Expression Using the Distributive Property & Combining Like Terms Solve: 4 (g +7) = 64 4g + 4(4) = 64 4g + 16 = 64 I'm getting a bit confused and struggling a lot in this problem. Please help me!

asked by Laruen on October 15, 2012
12. ## math

Solve sin2x + sin4x = cos2x + cos 4x for x in the interval[0,2pi) Hint: the following substitution should come in handy: sin3x= cos3x . tan3x

asked by greg on December 3, 2012
13. ## Math

The diameter of a lead pipe is measured to be 2.40 cm and you are asked to convert to units of inches. Which of the following conversion factors can you use to solve this problem? 12 in = 1 ft 100 cm = 1 m 3 ft = 1 yd Two of the these ?>None of these

asked by Jakey on January 10, 2013
14. ## calculus

Use the first five terms of the exponential series and a calculator to approximate each value to the nearest hundredth. e^3.5 I honestly don't understand the concept or how to solve the problem. :(

asked by Kim on May 26, 2010
15. ## science

4. Jenny crosses 2 hybrid pea plants. What is the probability that the offspring will be short? Draw a punnett square below to solve this problem

asked by ttng on November 10, 2015
16. ## Math 6b

You roll a number cube twice. Find P(even then not 2). Write the probability as a fraction in simplest form. I don't know the answer to this one but I'm just asking for the process so I can solve it.

Write and then solve for y = f(x) the differential equation for the statement: "The rate of change of y with respect to x is inversely proportional to y^4" So dy/dx=k/y^4 (y^4)dy=(k)dx Integrate y^5/5=kx+C Is this the final answer or is there more?

asked by Anonymous on April 11, 2018
18. ## Algebra

A student scored 81 and 95 on her first two quizzes. Write and solve a compound inequality to find the possible values for a third quiz score that would give her an average between 85 and 90.

asked by Max on June 13, 2017
19. ## Math

Solve the proportion: The local technology store had discounted all of their products 40%. What will your purchase price be if the tablet you are looking at originally costs \$475.00

asked by Amy on January 9, 2016
20. ## vectors

Find any vector w that is perpendicular to both u = 3j + 4k and v = 2i. i, j, k are basis vectors. Textbook answer: (0,4,-3) My attempt: used any scale factor variation, like 4j-3k or -8j+6k to get w=8j-6k How do i solve this the longer way?

asked by luke on May 27, 2018
21. ## CALCULUS

Using the separation of variables technique, solve the following differential equation with initial condition: (4x sqrt)(1 - t^2)(dx/dt) - 1 = 0 and x(0)=-2 I believe that the answer is one of the following two options: a.) 2x^2 = arcsint + 8 b.) arccost +

asked by Anonymous on May 26, 2012
22. ## statistics

A standardized test has a mean of 88 and a standard deviation of 12. What is the score at the 90th percentile? Assume a normal distribution. how would I solve? a. 90.00 b. 112.00 c. 103.36 d. 91.00

asked by Nicole on September 16, 2014
23. ## Math

A farmer is putting a fence around his flower garden. He can use no more than 80ft of fencing. He wants the width to be at least 5ft and the length to be at least 20ft. How do I solve this inequality?

asked by Darnell on September 5, 2012

This one, I am very confused on and I have no idea how to solve. Please help explain it so I can understand it. Given that the positive integers a, b, c, and d satisfy a/b < c/d < 1, arrange the following in order of increasing magnitude: b/a, d/c, bd/ac,

asked by Dulcibella on January 19, 2009
25. ## Pre-Calculus 11

I don't know how to solve this... Question: Suppose 5/7ã3/2 is written in simplest form as aãb, where a is a real number and b is an integer. What is the value of b? (The square root is over the whole fraction of 3/2) A 2 B 3 C 6 D 14 I think it is

asked by Anonymous on July 9, 2016
26. ## trig

Two ships, one sailing at 30 km/hr and the other at 45 km/hr, left port at the same time. Three hours later they were 120 km apart. If you had to find the angle between their courses an equation that could be used to solve this problem is:

asked by jonathan on February 24, 2008
27. ## Pre Calc!

Two ships, one sailing at 30 km/hr and the other at 45 km/hr, left port at the same time. Three hours later they were 120 km apart. If you had to find the angle between their courses an equation that could be used to solve this problem is:

asked by Ilene on May 24, 2010
28. ## math

76x + 46y=474.25 54x+37y+346.25 solve x and y can you use substitution to do this question math 10 pre cal thanks a lot

asked by Anonymous on July 28, 2018
29. ## Chemistry to DrBob222

Regarding my question on display.cgi?id=1496901710(I can't post URLs) Can we apply the formula PM=dRT seperately to the systems before and after being heated,and solve this one?

asked by Shenaya on June 14, 2017

for a science project what questions can you ask about things that has to do with scientific process and how to solve it through forming hypothesis and give evidence about it like a question about population or something..

asked by kiana on December 13, 2010

How long will it take for prices in the economy to double at a 6% annual inflation rate? Round to the nearest hundredth. Please explain how to solve this problem, thanks.

asked by Sara & Anonymous on October 17, 2009

The Police Commissioner is under pressure to solve a murder and offers \$100,000 for information leading to an arrest and conviction of the culprit.

asked by Dee365 on January 20, 2016
33. ## math 1

Pls solve this using one variable: The difference bet 2 numbers is 3. The sum of thrice the smaller and the larger is 35. Find the original number.

asked by MNHS on November 14, 2012
34. ## math

Bob makes 5.5% commision selling eletronics. How much commission dose she make if she sells a flat-screen TV for %10,000? how would i solve this?

asked by Lilly on November 14, 2010
35. ## Algebra

Solve z/6+14=z/6+25-z/6 for z. z/6+14=z/6+25-z/6 ___-14____-14 ________________ z/6=z/6+11-z/6 I have tried this problem a few times. The book says the anwer is z=66. I understand you would now take the 6 from the left side and multiply the 11 to get the

asked by G on June 11, 2009
36. ## Math

Solving Equations with Grouping Symbols: 3(g-3)=6 Please explain how to do this Rules: Use Distributive Property Combine like terms Solve by using inverse operations

asked by Cassie on January 18, 2012
37. ## math

Write a proportiom to describe the situation the solve. Three cans of dogs food sell for 99 cents. Fine the cost of 15 cnas

asked by lilly on November 11, 2010
38. ## calculus

the vector function r(t)=< 5 sin t, 3 sec t > , represents the position of a particle at time t. find the velocity v (t) and acceleration a (t). I don't know how to solve it without the t given. Please help

asked by Danny on March 21, 2016
39. ## trigonometry

Find the values of s in the interval [0,pi/2] that make the statements true. 1. sin s=0.75438373 2. cos s=0.74241049 3. cot s=5.6394377 Can you tell me how you solve these.

asked by y912f on January 7, 2009
40. ## math

can some please solve everyone because i do get it. 102,105,111,114,120,123,129,_,_,_,_,_, 201,204,210,213,219

asked by Jay on January 24, 2011
41. ## US History

Roosevelt asserted that the expanded reach of the federal government to solve economic problems was not an essential change to the Constitution. Do you agree? Why or why not?

asked by James on March 27, 2017
42. ## Chemistry

Solve the following pls. Calculate the number of grams in these quantities: 1. 0.0600 mol HC2H302 2. 4.50 x10^21 molecules glucose C6H2O6

asked by sally on December 14, 2012
43. ## Algebra 2 Honors

Well, I'm having trouble on some of my homework questions and looking to get help as soon as possible on one of them about inverse variation. 1. If y varies inversely as x and y = -3 when x = 9, find y when x = 81. I will use the equation y = k/x but I

asked by Brian on May 11, 2015
44. ## Maths

The question says : the gradient of a curve is give by dy/dx = x^2 - 6x. Find the set of values of x for which y is an increasing function of x. I didn't understand what they are asking me to do could you solve and explain?

asked by beavis on March 18, 2012
45. ## Pre-Algebra

what is the surface area of a square pyramid if the slant height is 15.2 m and the base is 15.2 m? please explain it to me. this is not homework, it is a practice question and I do not understand how to solve it. Someone PLEASE help!

asked by #1Student on February 20, 2014
46. ## Pre-Calculus 11

I don't know how to solve this... Question: Suppose 5/7ã3/2 is written in simplest form as aãb, where a is a real number and b is an integer. What is the value of b? (The square root is over the whole fraction of 3/2) A 2 B 3 C 6 D 14 I think it is

asked by Anonymous on July 9, 2016
47. ## Simple math question!

h(0.5) if h(x) = 6-2x^3 So I set it up as 6 - 2(0.5^3) correct? That way only the (0.5) is being cubed, and THEN multiplied by 2? Or does it mean to cube the entire product? Such as (2 x 0.5)^3? Ugh simple things like this always get me! I can solve it

asked by Mandy on September 3, 2011
48. ## Trig

Solve the equation for the given domain. 4cos^2 θ = 1 for 0 to 360 degrees. I get 60, 120, 240, and 300. Are these correct? If so, how would I represent them with some sort of expression?

asked by Anonymous on May 16, 2015
49. ## math (Matrix algebra)

solve the equations by using a) the adjoint matrix b) elementary row operations i) x+y+z=6 2x-y+z=3 x+4y-z=6 ii) 3p-3q+r=1 -3p+5q-2r=-1 p-2q+r=3 iii)-12a+b+17c=-14 2a-b+3c=5 8a+b-13c=-3 thanks sir/madam

asked by munir on April 16, 2014
50. ## Math 111

Solve the equation by the square root property. If possible, simplify radicals or rationalize denominators. Express imaginary solutions in the form a+bi. [X+ 2/3]^2=10/9

asked by Anonymous on April 2, 2010
51. ## math

can some please solve everyone because i do get it. 102,105,111,114,120,123,129,_,_,_,_,_, 201,204,210,213,219

asked by Jay on January 24, 2011
52. ## math

write an equation in slope-intercept formfor the line passing through each pair of points. (12,5) and (-4,1) pleae help me!!!! i don't understanf how to solve it

asked by Lilly on May 7, 2009
53. ## role of central nervous system

I am seeking a website which will help me with what the role of the nervous system in sensing, processing, and responding during stressful eposides in your life such as rages or shock. I need it to possibly help me understand how the brain responds during

asked by chana on January 10, 2007
54. ## Technology

(this post never got answered :() I need help with these two questions: 1. Sheet metal and copper piping are examples of a. natural resources b. industrial products c. consumer products d. standard materials I think it's either B or D 2. Which of the

asked by y912f on January 4, 2010
55. ## Government

2. Advocates of a parliamentary system argue that Congress is inefficient, moves slowly and develops policies filled with compromises. What evidence supports this negative evaluation? Your answer should discuss the intentions of the Founding Fathers, the

asked by Anonymous on November 29, 2011
56. ## Economics

Engineering Economics Essay 1: You wish to purchase a home for \$150,000 and you can put down 10% of this price as down payment. You can get a 20 year fixed rate mortgage loan for 6.0% with no points. You can optionally decide to pay 2 points to bring the

asked by Rashed Alhajri on July 9, 2011
57. ## science experiment

See the question from earlier regarding how many variables are in the experiment. I think speed of stirring is a variable. So, my answer would be 3 variables. One for water temp., speed of stirring, and the calcium carbonate solubility. Is this right? I

asked by Hailey on February 13, 2007
58. ## Global History

What were the differing politucal and economic systems between the US and Soviet Union that helped lead to the Cold War? I know that the political difference was that the US was democratic and the Soviet Union were communists. However, if the US economic

asked by Jack on May 1, 2010
59. ## science

an 8 kg and a 16 kg block are suspended at opposite ends of a cord passing over a pulley. compute (a) acceleration of the system (b) the tension in the cord connecting the blocks and (c) the tension in the cord supporting the pulley. The weight of the

asked by doflamingo on July 23, 2017
60. ## Calculus

A ball is thrown from the origin of a coordinate system. The equation of its path is y = mx - e^2m/1000 . x^2, where m is positive and represents the slope of the path of the ball at the origin. For what value of m will the ball strike the horizontal axis

asked by Candy on January 29, 2009
61. ## Chemistry-titrations

Question: An unknown mass of (NH4)2CO3 is mixed with 4g of NaOH and dissolved in 100cm3 of water,which results a clear solution.Gasses are removed by heating the final solution. 2 parts of 25cm3 of final solution is taken and one is titrated with 0.5 M HCl

asked by Shenaya on May 29, 2017
62. ## chemistry

So i had trouble finding the answers to these questions on a lab: Background: If we were using a burret/flask instead of a pipette and well plates. Before you started, the buret must be rinsed with 1 ml of distilled water and then 1 ml of NaOH solution.

asked by Jenny on October 1, 2009
63. ## Chemistry

So i had trouble finding the answers to these questions on a lab: Background: If we were using a burret/flask instead of a pipette and well plates. Before you started, the buret must be rinsed with 1 ml of distilled water and then 1 ml of NaOH solution.

asked by PPLLEEAASE Help!!!! on October 1, 2009
64. ## Civics (Reed)(Check)

This post is about accused persons in criminal cases and speedy and fair trial. 1. What information is being presented? What facts are presented? A: For accused persons in criminal cases: A: You are protected against the abuse of the govt. in criminal

asked by Victoria on May 17, 2016
65. ## Civics (Reed)(Check)

This post is about accused persons in criminal cases and speedy and fair trial. 1. What information is being presented? What facts are presented? A: For accused persons in criminal cases: A: You are protected against the abuse of the govt. in criminal

asked by Victoria on May 16, 2016
66. ## math

Consider the following method of estimating Fahrenheit temperatures given Celsius temperatures (which was stated earlier in this section): To estimate the Fahrenheit temperature for a given Celsius temperature, double the Celsius temperature and add 30.

asked by jeng on October 28, 2009
67. ## Algebr

Each week you must do a minimum of 18 hours of homework. Participation in sports requires at least 12 hours per week. You have no more than 35 hours per week in total to devote to these activities. - Write a system of inequalities to model the situations.

68. ## Algebra

A roadside vegetable stand sells pumpkins for \$5 each and squash for \$3 each. One day they sold six more squash then pumpkins and their sales totaled \$98.00. Write a system of equations to find the number of pumpkins and squash they sold.

asked by Hannah on February 10, 2011
69. ## w.g

the aryans arrived in the indus valley and wrote the vedas A)after the indus valley civilization crumbled B)with the help of mohandas ghandi C)**during the hieght of the indus valley civilization D)to institiute a permanent caste system

asked by henry on September 24, 2009
70. ## Science

In an experiment, 200 g of aluminum at 100degrees celsius is mixed with 50.0g of water at 20.degrees celsius, with the mixture thermally isolated.(a)What is the equilibrium temperature?What are the entropy changes of(b)the aluminum,(c)the water,and(d)the

asked by lungi on August 23, 2010
71. ## science

1. The liquid part of the blood is called _____. (1 point) hemoglobin plasma platelets white blood cells 2. Your circulatory system can best be compared to _____. (1 point) gates a net pipes a balloon 3. Which of the following shows the correct order of

asked by Anonymous on January 31, 2016
72. ## Accounting

Sierra Company is considering a long-term investment project called ZIP. ZIP will require an investment of \$121,200. It will have a useful life of 4 years and no salvage value. Annual revenues would increase by \$79,180, and annual expenses (excluding

asked by Francesca on July 15, 2012
73. ## History

I just need some ideas for 4 questions. It sounds silly but I need inspiration. ~~~~ 4. Why would the canal developers have studied the British canal system before they designed the Erie Canal? Write four questions the developers might have asked during

asked by Astral Tellurian on January 18, 2016
74. ## basic college math

I have a problem answering this certain question, can you help me? The hydraulic system on a forklift contains 7/8 gallon of hydraulic fluid. A cracked seal resulted in a loss of 1/6 gallon of fluid in the morning and another 1/3 gallon in the afternoon.

asked by jill on June 19, 2009

An employer has a daily payroll of 1225.00 when employing some workers at 80.00 per day and others at 85.00 per day. When the number of 80.00 workers increases by 50% and the number of 85.00 workers is decreased by 1/5, the new daily payroll is 1540.00.

asked by amy on February 25, 2009
76. ## physical science

Dissolving sodium chloride in water will 1: raise the freezing point of the solution, 2. raise the freezing point of the sodium chloride, 3. lower the freezing point of the solution, or 4. lower the freezing point of the sodium chloride?

asked by palmer on November 6, 2007
77. ## science

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? mgSinTheta = mg*mu*CosTheta

asked by Henry on August 24, 2006
78. ## Math

Zach had to make bracelets for Student Council. He made 10 of them on Monday and 2/5 of them on Tuesday. Zach completed the remaining 1/2 on Wednesday. How many bracelets for Student Council did Zach have to make? Tuesday = 2/5 = 4/10 of the total.

asked by Tom on December 15, 2014
79. ## Informal Logic

Arthur: The solutions to most mystery novels I read are not believable. However, my enjoyment of a mystery novel depends only on its suspenseful mood and colorful characters. Norton: Roughly 80% of the mystery novels I read have believable solutions, which

asked by Donna on April 27, 2013
80. ## History

1. Who invented the sewing machine? a. Elias Howe*** b. Robert Fulton c. Samuel Morse d. John Deere 2. By 1860, the Midwest and the East were united by a network of... a. Roads b. Railroad tracks*** c. canals d. steam-powered ships 3. Which invention

asked by Alice on February 22, 2016
81. ## Financial management

Im having a little trouble can someone please help me. Im not sure if my answers were right or what the rest would be. 1. _________C__________ is the interest rate in which NPV equals zero. a. Required Rate of Return b. Annual percentage rate (APR) c.

asked by Christian on August 6, 2012

nick's diner advertise fresh squeezed orange juice every day of the year. he serves twenty-four 8-ounce glasses of juice a day. nick knows it takes three 6-ounce oranges to make one 8-ounce glass of juice. nick orders oranges by cases that have 24 oranges

asked by dk on January 24, 2011
83. ## Science / Biology

How does modern science explain the evolution of abiotic to biotic matter? How would the first life form have survived in the first day / week of its formation? What kind of system of organelles / biological functions would it have to form in the first day

asked by Jess on May 11, 2008
84. ## Chemistry

How can you predict whether the change in entropy for a system will be positive or negative? Like if the enthalpy is negative what will the entropy be? Try these 2 sites: http://www.shodor.org/unchem/advanced/thermo/index.html

asked by Christian on May 19, 2007
85. ## physics

can somebody shows me how to get to the answer key step by step. the answer key is 2.78i-10.2j A 1.49-kg particle initially at rest and at the origin of an x-y coordinate system is subjected to a time-dependent force of F(t) = (4.00ti − 9.00j) N with t

asked by joy on February 13, 2018
86. ## math

Kenisha sells athletic shoes part-time at a department stoe. She can earn either \$500 per month plus a 4% commission on her total sales, or \$400 per month plus a 5% commission on total sales. Write a system of equations to represent the situation.

asked by Artie on February 18, 2008
87. ## History

How is Vatican City different from all other European countries? Answers: A: It is located entirely inside another country. B: It is a theocracy. (My Answer) C: It has a Catholic majority. D: It does not use the euro. My Answer: I would say it is B because

asked by Anonymous on May 17, 2019
88. ## AP Physics Momentum...stuck

A spring loaded 100g dart gun is affixed at rest on a 150g frictionless cart. It fires a 25g dart with a velocity of 30 m/s. What is the final momentum of the system? I'm confused as to whether or not I should use conservation of momentum or center of

asked by Tyger2020 on September 5, 2017
89. ## Physics, Statistics

Consider a series of 8 flips of a fair coin. (a) Calculate the probabilities for obtaining 0-8 heads. We will consider each of these nine outcomes to be macrostates of the system. (b) Calculate the entropy for each of these macrostates. I was able to

asked by Heidi on December 4, 2015
90. ## chemistry

Rationalize how the addition of the silver nitrate to the Fe/SCN equilibrium system had an effect even though neither Ag nor NO3 appears in the equation shown in the text. Equation in text is FE3+ + SCN- [FeSCN]2+. I know that AgSCN is formed and

asked by matt on March 18, 2016
91. ## fin decision making for managers

Aberdeen Corp. uses activity-based costing system with three activity cost pools. The following cost information is provided: Wages and salaries \$ 220,000 Depreciation 120,000 Utilities 100,000 Total \$440,000

asked by san on November 26, 2011
92. ## college/human biology

Name an example of a cell, tissue, organ, and organ system in the human body that illustrates the concept of increasing complexity of biological organization. For each step forward in biological organization, briefly describe a specific function that is

asked by marie on June 5, 2009
93. ## Physics

A proton is located at a distance of 0.430 m from a point charge of +8.30 µC. The repulsive electric force moves the proton until it is at a distance of 1.55 m from the charge. Suppose that the electric potential energy lost by the system is carried off

asked by DCM on April 6, 2012
94. ## AP Physics

Two particles, each of mass m and speed v, travel in opposite directions along parallel lines separated by a distance d. (a) Find an expression for the magnitude L of the angular momentum of the two-particle system around a point midway between the two

asked by Anonymous on March 20, 2013
95. ## social studies

the southern states supported the Virginia Plan because: (A) it created a system of national courts (B) the legislature wa s to be apportioned according to a state's population (C) the upper house was to be elected by the state legislature (D) a large

asked by lila on March 25, 2010
96. ## Calculus

The acceleration function (in m/s2) and the initial velocity v(0) are given for a particle moving along a line. a(t) = 2t + 2,    v(0) = −3,   0 ≤ t ≤ 5 (a) Find the velocity at time t. v(t) = t^2+2t-3 m/s (b) Find the distance traveled during

asked by Anon on December 9, 2017
97. ## Health

Write a 200- to 300-word response to the following: What is long-term care? Provide an example. What is continuum of care services in the United States? Why is long-term care one of the greatest challenges facing the health care delivery system today?

asked by Marty on July 19, 2012
98. ## Government

When it was developed during the jackson administration,the patronage system was designed to: A.provide jobs to merit appointees. B.increase congressional control of the bureaucracy. C.increase judicial control of the bureaucracy. D.make the administration

asked by Calvin on December 21, 2011