# 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 86
1. ## Pre-Calculus

Sketch the graph f(x)=-2x^2(x-5)^3(x+2)^4. What would be my coordinates. I solved it and my graph looks nothing like the one on wolframalpha. Can someone show me how you would solve this?

asked by Cooper on March 25, 2012
2. ## Math- Negative and Zero Exponents

Please show step-by-step how I am supposed to solve these types of problems. 1. 4ab^0 2. 5x^-4 3. (3x^-2)/y

asked by Anonymous on January 19, 2014
3. ## maths

solve the following equation by completing square x(square) + 5x - 84 Pls show steps x= or x=

4. ## algebra

which quadratic formula would be used to solve the following quadratic equation? 4x^2 - 5x = -2 can you show me the correct answer and how do it please

asked by gabriel on June 8, 2010
5. ## Pre-Calculus

Sketch the graph f(x)=-2x^2(x-5)^3(x+2)^4. What would be my coordinates. I solved it and my graph looks nothing like the one on wolframalpha. Can someone show me how you would solve this?

asked by Cooper on March 25, 2012
6. ## Math

Can u solve and show steps for x/2 + 1 = 1/4x - 6? I subtract 1 from each side. Then I times each side by 2 to get x alone. Do I multiply 2 1/4 and 7?

asked by Kelley on September 12, 2012
7. ## Pre-Cal

I really need help on this. Can someone show me step by step how to do this plz. Solve the follow: csc (tan^-1(x))

asked by Nicolle on June 24, 2016
8. ## intermediate algebra

how do you solve for f(x)=2x if

asked by linette on June 19, 2013
9. ## Simultaneous equation

Solve the equation 5x-3y=14 and 3x+5y=18 using substitution. The ans is x=3 11/17 and y= 1 7/17 I couldn't get the above answers, could someone show me clearly how to get those answers, thank you.

asked by Cheezel on June 24, 2016
10. ## pre algebra

please show me step by step how to solve the following equation -2x+4y=9 to find the slope of the line.

asked by sherry on February 10, 2010
11. ## Help! for Chemistry H.W.

I need help with my chem home work. Please show me the answers because this question is a very confusing question to me. Therefore I really need you to provide the answer to this question please... Question 1: A sample of CO2 gas with a mass of 0.30 g is

asked by Lori on April 29, 2008
12. ## HELP ME HEALTH 3 QUESTIONS

1)What is the importance of wearing sunglasses all year long? A. they block the amount of light that gets inside your pupils. B. They block the harmful UV rays that come from the sun. C. They prevent your iris from getting bigger from the sunlight. D. They

asked by #LOVE PINK on January 8, 2016
13. ## statistics

If the average number of textbooks in professors offices is 16 with a standard deviation of 5; and the average age of professors is 43 with a standard deviation of 8. Calculate the covariance of the number of textbooks in professors offices (show your work

asked by Leannes on May 10, 2012
14. ## Science

In order to sail through the frozen Artic Ocean, the most powerful icebreaker ever built was constructed in the former Soviet Union. At the heart of the ship's power plant is a nuclear reactor with a power output of 5.60X10^7 W (5.60 times ten to the power

asked by Lilly on March 2, 2010

Exact interest method (365 days) and ordinary interest method (360 days) for \$450 loan at 12.9% interest rate 220 days.

asked by Tiffany on November 16, 2017
16. ## English

1. He never wants to work. 2. He wants to never work. 3. He wants never to work. ============================ Can we use all the expressions? In #2, 'never' is put before 'work'. Is it a split infinitive? Can we use this way?

asked by rfvv on May 23, 2018
17. ## Finance

Nancy Tai has recently opened a revolving charge account with MasterCard. Her credit limit is \$1000, but she has not charged that much since opening the account. Nancy hasn't had the time to review her monthly statements as promptly as she should, but over

asked by Jes on July 20, 2006
18. ## Chemistry

Standardization of iodine solution was prepared using 10.0 mL of a standard, 1.00 mg/mL, ascorbic acid solution. Titration with the iodine solution required 35.80 mL to reach the end point. What is the molarity of the iodine solution?

asked by Rachael on October 26, 2016

Devin attempted to solve the inequality -2x+6>10 following the steps below: •subtract 6 from both sides of the inequality. •divide both sides of the inequality by -2. He finds that x>-2. Clearly explain why this is not a correct solution. In your

asked by Nicole on April 20, 2012
20. ## Algebra

Devin attempted to solve the inequality -2x+6>10 following the steps below: •subtract 6 from both sides of the inequality. •divide both sides of the inequality by -2. He finds that x>-2. Clearly explain why this is not a correct solution. In your

asked by Nicole on April 20, 2012
21. ## English

For one year, students have no mid-term exams and final exams. They can do a lot f activities such as career exploration activities, club activities, arts/PE activities. They can also learn many subjects. Because they don't have exams, they can have a good

asked by rfvv on March 20, 2019
22. ## precalc

4. REVIEW PROBLEM: Solve). √3-2x + √3x +13 =5 the term (3-2x) is under a radical as well as the term (3x+13). Please show all steps!! i keep on getting x=9 but plugging it in it is wrong!

asked by Jillian on February 22, 2016
23. ## calculus

Prove that there is a number that is exactly one more than its cube. (don’t solve just show there is one) Prove that the function f(x)= cosx-x has a zero in (o. pi/2) Justify.

asked by kelli on September 23, 2010
24. ## Discrete Math

Let A={0,1,2,3,4}. Define a function f from A to A by f(n)=2n mod 5. a/ Is f one-to-one? b/ Is f onto? Could you show me how to solve this problem, please? I have no idea what this function is. Your help is greatly appreciated.

asked by yengiang on April 16, 2011
25. ## Algebra

I'm trying to solve (5x-4)/(5x+4)=2/3. I don't know how to get the x's on their own. I thought that the fraction would cancel itself out so it's -1x, but that wouldn't equal 2/3. Could you show me this step-by-step? Thanks!!!

asked by Jaymie on September 28, 2009
26. ## Math

I still do not understand how to solve the following problem. Please show step-by-step. x = Integral (0 to v) dv/(q^2-v^2) where q = constant the answer is --> x = 1/2q ln (q+v/q-v) 1) Where 1/2q came from? 2) Where ln came from? Is there a formula for it?

asked by Anthony on December 8, 2007
27. ## Math

If the odds in favor of an event A are 3 to 1, what is the probability associated with event A occurring? I am so confused with this question could you show me how I could solve it?

asked by sam on August 22, 2009
28. ## algebra

solve by using the quadratic formula prove your answer is correct by checking can someone please show me how to do this step by step 2x^2+3x+4=0

asked by johnnie on October 5, 2013
29. ## calc

y=ln(x+1) +ln(x-1) find dy/dx I have trouble with this problem since i'm not that familar with finding the derivative when they involve ln. Please show me how to solve this problem. I should have gotten 2x/(x^2-1)

asked by Brian on January 17, 2007
30. ## math

an 8- acre field can be mowed in 5 hours,how long to mow 1.6 acre?solve show steps

asked by Anonymous on December 5, 2012
31. ## math, HELP ME PLEASE!!!

Circle O has a circumference of 220 meters. What is the approximate area of circle O? Show your work.

asked by syram on March 21, 2013
32. ## Math

The perimeter of a regular pentagon is 35in. What is the lenght of one side of the pentagon? Show your work.

asked by Leah on February 21, 2012
33. ## math

I need to see how to arrange 8-1/5y=10x to mx+b form Is it -1/5y=10x-8? I need the slope and y intercept. Thanks much to who ever helps me. Can anyone show me how to work this?

asked by barb on September 4, 2010
34. ## math

Determine if the quadratic functions are positive definite, negative definite or neither: a. y=-2x^2+3x+2 b. 3x^2+x+11 Please show work, thank you!

asked by Sally on February 24, 2019
35. ## calculus

Find the inverse the following function. Find the domain, range, and asymptotes of each. f(x)=In(x+1)+1 Please show work

asked by Julienne on December 31, 2012
36. ## Chemistry

How many ml of .050 M NaOH are required to prepare 1500.0 mL of .0020 M NaOH? Please show work, I'm not sure how to do this. Thanks!

asked by Candace on September 1, 2009
37. ## Pre-Cal.

find all the zeros of the following polynomial. Write the polynomial in fraction form. Show all the work. f(x)= x^4+3x^2-40

asked by phyllys on December 26, 2012
38. ## Chemistry

How many ml of .050 M NaOH are required to prepare 1500.0 mL of .0020 M NaOH? Please show work, I'm not sure how to do this. Thanks!

asked by Candace on September 1, 2009
39. ## Algebra

Evaluate the logarithmic equation for three values of x that are greater than 1, three values of x that are between 0 and 1, and at x=1. Show your work. y=log7 x

asked by Tom Allison on June 13, 2010
40. ## algebra 1

Simplify using long division(please show work so I understand) 1.Divide (72-8x^2+4x^3-36x)by (x-3) 2.Divide (8b^3-6) by (2b-1)

asked by Jan on April 15, 2013
41. ## math, HELP ME PLEASE!!!

Circle O has a circumference of 220 meters. What is the approximate area of circle O? Show your work.

asked by syram on March 21, 2013
42. ## Math

Latishastarted her history class with two scores on tests, 72% and 89% confirmed that the mean of these two scores is 80.5% show your work

asked by Feliks on August 24, 2015
43. ## math

find the inverse of the following function. find the domain, range and asymptotes of each. f(x)=In(x+1)+1 please show work.

asked by Heather on January 2, 2013
44. ## Pre-Calc

Find all solutions of the equation in the interval [0, 2pi). Show all work. sin(x+(pi/6))-sin(x-((pi/6))=1/2

asked by Louis on January 28, 2015
45. ## Math

Simplify each expression and state any non-permissible values. (5 marks - show your work) 3x+1/2x^2-2 + 2x+2/2x^2-8x+6 is the expression Can you help please?

asked by Alex on January 7, 2015
46. ## algebra

factor out the greatest common factor. Please show all work. 15wx-20wy-25wz

asked by shir on July 22, 2011
47. ## GEOMETRY

Given u= (22,23,24,25,26,27,28,29,30,31,32) A= 22,24,26,28,30) and b = (23,24,25,28,29) FInd AUB. Do not skip the answer. show your work finding A then B then find their union.

asked by angela on July 2, 2012
48. ## algebra ll

if f(x)equals 5x^2 minus 4/x, find f(4) my ans. is f(4) equals 66 if wrong answer and show work please

asked by Anonymous on October 6, 2008
49. ## geometry

Use the diagram below to answer the following questions.||. Show all work to receive credit a. Find the value of x. b. Find m

asked by Anonymous on July 14, 2010
50. ## Calculus

Find the derivative of the function using the definition of a derivative. F(x)=squareroot(1-3x) Please show work for understanding, thank you! :)

asked by Tori on February 14, 2013
51. ## Math

A cube has a surface area of 24 ft2. What is the length of one edge of the cube? Show Work Please.

asked by Carl on June 1, 2014
52. ## Math, Algebra

Circle O has a circumference of 220 meters. What is the approximate area of circle O? Show your work.

asked by syram on March 21, 2013
53. ## algebra

write the slope intercept equation for the line with the given slope that contains the given points....M=-3/4;(0,5)..Show work

asked by sherry on March 16, 2012
54. ## math

change the exponential expression to an equivalent expression involving a logarithm. 8.8=7^x please show work

asked by help! on September 2, 2012
55. ## precalculus

the following function is one-to-one find its inverse. find domain and range of f and f^-1 show work f(x)=^3sqrt(x-3)

asked by Sara on January 9, 2012
56. ## algebra

The temperature at 5pm is 20F. The temperature at 10pm is -5F. How many degrees did it fall?please show work

asked by aggs on January 12, 2016
57. ## Math

A recipe ask for 2/3cup of water and they want to triple the recipe. How do I show the work. What is the first step to get the answer.

asked by Jim on April 13, 2016
58. ## chemistry

if 240ml of O2 gas increases pressure from 0.40 atm to 0.80 atm what is the new volume? show all work

asked by shane on May 16, 2012
59. ## Algebra 2

Solving Quadratic Systems 16x^2-9y^2=144 y=9-x^2 Please show work I'm having trouble solving it.

asked by Alicia on November 29, 2014
60. ## College Algebra

Verify that the function f and g, are inverses of each other by showing that f(g(x))=x and g(f(x))=x. Graph both the functions on the same graph. Please show all of your work. f(x)=-7/x-4 g(x)=4x-7/x

asked by Jo on January 18, 2012
61. ## physics

What is the velocity of a baseball thrown 40m from third base to first base in 1.9s? Show your work, and simplify please.

asked by Sabrina on October 28, 2014
62. ## Math

What is the circumference of the circle round to the nearest tenth and show all work and the area of the circle is 9.5m

asked by Lori loseenem on June 15, 2016
63. ## algebra

Circle O has a circumference of 220 meters. What is the approximate area of circle O? Show your work.

asked by syram on March 19, 2013
64. ## Math

f(x)=g(x)−1, g(x)=5x+2. Find f(4)−g(2) PLZ ANSWER FAST (you dont have to show work as long as the answer is right)

asked by Nate on May 21, 2017
65. ## Math-geometry

This is so confusing :( Given U = {10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}, A = {12, 14, 16, 18, 20}, and B = {11, 13, 14, 15, 18, 19, 20}. Find A′ ∩ B′. Do not skip to the answer. Show your work, finding A’, then B’ then find their

asked by Jen on July 9, 2011
66. ## Math

How do you show the work for this problems? (7x9)-3x6+7 8-18x2 divided by 9+5 4 divided by 2x2+7-4

asked by Larry on November 20, 2009

This is so confusing :( Given U = {10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}, A = {12, 14, 16, 18, 20}, and B = {11, 13, 14, 15, 18, 19, 20}. Find A′ ∩ B′. Do not skip to the answer. Show your work, finding A’, then B’ then find their

asked by Jen on July 9, 2011
68. ## physical science

A block of carbon, 1.0 cm by 2.0 cm by 5.0 cm has a resistance of 0.80 Ω between its two smaller faces. What is the resistivity of carbon? (show work)

asked by michelle on February 17, 2017
69. ## precalculus

find the exact value of the following logarithm. Use the properties of logarithms show all work. log2 34-log2 17 (Those are little two's)

asked by Sara on January 9, 2012
70. ## pre-Algebra

Write the following as a fraction and show your work. 0.83 (the three is repeating) I don't know how to do it with only one of the numbers repeating and it is not in my book.

asked by Greg on December 11, 2007
71. ## math

Gina read 35% of her 140 page book how many pages did she read?? Show all your work

asked by lee on February 7, 2013
72. ## Maths

Find the equation of a line which is perpendicular to 2x + 3y = 4 passing through ( -5, 1) Can you show mw how to work this out step by step please?

asked by Remy on September 20, 2009
73. ## Math

Barry is 8 years older than his sister. In 3 years, he will be twice as old as she will be then. How old is each now? Please show work! I don't understand.

asked by ANNIE on March 5, 2013
74. ## prealgerbra

A car travels at a speed of 44 feet per second. What is the speed in miles per hour? Show all work

asked by steph on January 24, 2012
75. ## science

Which is more concentrated, 5g sugar/500ml water or 3g salt /75ml of water. Show your work

asked by Cherie on September 18, 2012
76. ## Algebra 2

Find the indicated term of each expansion. fifth term of (x^2+squ. root 3x)^8 Please show work I need to learn how to do it.

asked by Genesis on December 17, 2014
77. ## Physics

A wave of wavelength 52 cm travels with frequency 400 Hz. What is the speed of the wave? Show work. Please help me...

asked by GlowBaby on December 17, 2018
78. ## Algebra

Please help...Evaluate the logarithmic equation for three values of x that are greater than 1, three values of x that are between 0 and 1, and at x=1. Show your work. y=log7 x

asked by J. Ed on June 12, 2010
79. ## Chemistry (Help)

0.275gAgNO3 is dissolved in 500mL of solution. a. What is the molarity of this solution. b. If 10.0 mL of this solution are transferred to a flask and diluted to 500mL, what is the concentration of the resulting solution? c. If 10.0mL of the solution in

asked by Anonymous on November 3, 2015
80. ## Calculus

Water is drained out of tank, shaped as an inverted right circular cone that has a radius of 16cm and a height of 8cm, at the rate of 4 cm^3/min. At what rate is the depth of the water changing at the instant when the water in the tank is 6 cm deep? Show

asked by Mel on January 8, 2016
81. ## accounting

Journalize the write-offs and the year-end adjusting entry for 2012 under the allowance method, assuming that the allowance account had a beginning balance of \$55,000 on January 1, 2012, and the company uses the analysis of receivables method. If an amount

asked by Anonymous on October 23, 2011
82. ## Calculus

Use Euler's Method with three equal step sizes to estimate the value of y(0.3) for the differential equation y ′ = y, with y(0) = 1. Type your answer in the space below and give 3 decimal places. If your answer is less than 1, place a leading "0" before

asked by Alice on April 2, 2019
83. ## accounting

1. A pressurized spray painter was purchased on April 1 of the fiscal year for \$4,800. It has a useful life of 4 years and a residual value of \$300. Determine depreciation expense for the first two years, assuming a fiscal year end of December 31 and using

asked by shawna on November 12, 2009
84. ## programming

Create the logic for a program that continuously prompts the user for a number of dollars until the user enters 0. Pass each entered amount to a conversion method that displays a breakdown of the passed amount into the fewest bill; in other words, the

asked by Anonymous on December 12, 2013
85. ## Physics...

Question In an experiment a gas was found to obey the following equation of state: (P + 10^3)V = 2.5 x 10^4 J Find the work done when the gas expands from 1 m3 to 3 m3. _______ the answer is suppose to be 2.55 x 104J ____________ what i did so far 2 ways i

asked by Kimora on November 12, 2008
86. ## PHYSICSS

Question In an experiment a gas was found to obey the following equation of state: (P + 10^3)V = 2.5 x 10^4 J Find the work done when the gas expands from 1 m3 to 3 m3. _______ the answer is suppose to be 2.55 x 104J ____________ what i did so far 2 ways i

asked by Kimora on November 12, 2008
87. ## Art

Artists make shapes in the background smaller than shapes in the foreground to communicate their distance from the viewer.How else might a landscape artist show shapes in the background to depict their distance from the viewer? A.Show shapes with bright

88. ## Art

Artists make shapes in the background smaller than shapes in the foreground to communicate their distance from the viewer. How else might a landscape artist show shapes in the background to depict their distance from the viewer? show shapes with bright

asked by hehehe on May 30, 2019
89. ## Chem AP help!

A zinc-copper battery is constructed as follows at 25°C: Zn | Zn2+(0.15 M) || Cu2+(1.70 M) | Cu The mass of each electrode is 150. g. The cell potential when the cell is first attached is 1.13V How long can this battery deliver a current of 5.00 A before

asked by Daya on March 12, 2012
90. ## Math

Find all numbers \$r\$ for which the system of congruences: x == r mod 6 x == 9 mod 20 x == 4 mod 45 has a solution.

asked by Anonymous on September 30, 2016
91. ## Chemistry

You are a work study student in our chemistry department. Amy, your supervisor has just asked you to prepare 250ml of 2.00M H2SO4 solution for tomorrow's undergraduate experiment. The Stock Solutions cabinet is under the Stockroom Explorer. You will find

asked by Melissa on July 10, 2014
92. ## Financing and Accounting

What does rule of thumb evaluation method mean? no matter how many times i read this, I get different answers..and how would I calculate this or what is the formula for the rule of thumb evaluation method???

asked by anonymous on March 5, 2010
93. ## Need help at this very minute with physics

In Figure 10-53, two blocks, of mass m1 =400 g and m2 =600 g, are connected by a massless cord that is wrapped around a uniform disk of mass M = 500 g and radius R = 12.0 cm. The disk can rotate without friction about a fixed horizontal axis through its

asked by John on December 1, 2006
94. ## Physics

a car traveling at 13 m/s^2 for 8.00 seconds. what is the distance the car travels? show all work

asked by Anonymous on December 8, 2011
95. ## math

15. The sum of five unequal whole numbers is 90. The second largest of these five numbers can be at most A.19 B.41 C.43 D.89 please explain and show work.

asked by Johnny on July 21, 2014
96. ## algebra

3/4 of a number is 1/2. Find the number in the lowest terms... please show work I am confused

asked by Laura on October 2, 2011
97. ## Algebra

Find the x and y intercepts and graph the equation plotting the intercepts.Show work...-5x+8y=-40

asked by sherry on March 17, 2012
98. ## math

Write the recursive formula and the explicit formula for the sequence {3,6,12,24,48,...}. Show all work.

asked by lexi on April 30, 2019
99. ## Geometry

Geometry: the width and area of a rectangle Is (4b^3+5b-3)/(2b-1) What is the length of the rectangle? Show work.

asked by Sandra on May 1, 2014
100. ## mathematics

Let A = (1,2,5) B = {1,2,4,5,6,8} and the relation R is "less than or equal to."Representing the relation BRA in set gives??? Please show me work

asked by philip on September 25, 2016