1. Trig

    I need help, I don't remember what to do. Find all solutions of the equation in the interval [0,2pi]. (2cosè+sqrt3)(cscè+1)=0 Write your answer in radians in terms of pi. If there is more than one solution, separate them with commas.

    asked by Rachal on May 14, 2011
  2. Algebra

    Write an equation with a variable on both sides of the equal sign that has infinitely many solutions. Solve the equation and explain why it has an infinite number of solutions. Okay so that is the question, I know it's already on Jiskha but I need it to be

    asked by Help me! on January 11, 2018
  3. CountIblis, can i bother you

    Countiblis, i know that you might be busy do you mind if i ask you the following for help.Only if you can please. can you explain to me just one more thing so i can undestand it. Now i have an equation which is : 3x = 3x + 5 which I know has no solution to

    asked by jasmine20 on January 3, 2007
  4. maths

    does this quadratic equation: 3x^2 - 2x - 9 = 0 have two solutions?? or none? and if there are solutions will it be either 1.431 or -1.431 (correct 2 3 decimal places) or 4 also 2.097 remember there is a + or - sign in the equation. You have to try both.

    asked by kat on May 19, 2007
  5. math,correction

    Find four solutions for the equation 3x+5y=15 so the equation will turn to be y=-(3)/(5)x+ (3) and when i do the table i get these points for the solution (-2,4.2),(-1,3.60),(0,3),(1,1.8) ok Let me give you a help. Take the slope, denominator. 5. Now make

    asked by Jasmine20 on January 26, 2007
  6. math

    compare and contrast: below are two equations. solve each equation and compare the two solutions. choose the statement that is true about each solution. equation #1 2x-3=-17 5x+3=12 A. equation #1 and equation #2 have the same number of solutions B.

    asked by HELLP PLEASE on October 13, 2014
  7. math

    21.Faith solves the equation 3(7x+4)=21x+4. How many solutions does she find? A. Infinitely many solutions B. 2 solutions C. 1 solution D. 0 solutions

    asked by Max on February 15, 2015
  8. algebra

    what are the solutions to the equation 2x^2=18 the possible answers are A. 2 solutions +/-9 B. 2 solutions +/-3 C. 2 solutions +/-√3 D. No solutions. i am completely and utterly lost so if someone could help me just like figure out what to do with the

    asked by ugg on April 29, 2019
  9. Algebra II

    1)What method(s) would you choose to solve the equation: x2 + 2x - 6 = 0 A. Square roots; there is no x-term. B. Quadratic formula, graphing; the equation cannot be factored easily since the numbers are large. C. Factoring; the equation is easily factored.

    asked by Hally on January 15, 2013
  10. Math: Calculus

    Can someone help me out here with these two problem? I have know idea where to start. 1)The equation: 10(x-1)(x-2)(x-3)=1, has three real solutions a

    asked by REALLY NEED HELP!!!! on November 4, 2010
  11. 2nd Order linear ODEs

    I'm having trouble solving this problem: For the equation x^(2)y′′ - xy′ = 0 , find two solutions, show that they are linearly independent and find the general solution. Hint: Try y = x^(r). I divided the equation by x^(2) first to simplify it, and

    asked by Student on January 30, 2014
  12. can someone help me with a question of an explanat

    my question is for math, I have the problem worked out i just don't remember what the tutor who helped me told me for the explanation of steps i just like to know how they came up with that. Directions: Solve each literal equation for the indicated

    asked by jasmine20 on January 3, 2007
  13. Algebra ??

    What would be the missing piece of information given the following information: Find the equation of the line that passes through the points (2, 6) and (4, 10). y = 2x + ? a. 4 b. 2 c. 7 d. 5 OK. let's take this step by step. y = 2x + ? Remember the

    asked by Margie on October 14, 2006
  14. algebra

    i dont do the solutions very well could someone help me? how many real number solutions does the equation have? 0=2x^2-20x+50 A. 1 solution B. 2 solutions C. no solutions D. infinite solutions Is it C? Also if anyone has the rest of the answers to Unit 4

    asked by avg joe who didnt go on April 29, 2019
  15. maths

    which solution is the correct for this equation 4x^3 - 3x = 15 -1.8, -1.7, -1.6, -1.5, 1.5, 1.6, 1.7, 1.8 ?? What is your thinking, and why? Have you considered graphing y= 4x^3 -3x -15 ? Kat, what level of study are you at. This is an equation which can

    asked by kat on May 13, 2007
  16. Physics

    so I'm doing the back of this worksheet and on the bottom there's a list of a whole bunch of formulas... I'm asked to find the minimum coefficent of friction if the road was flat of a car which I still don't know how to do and posted a question about it

    asked by HELP ME! on May 11, 2009
  17. ALGEBRA

    The table below shows two equations: Equation 1 |3x - 1| + 7 = 2 Equation 2 |2x + 1| + 4 = 3 Which statement is true about the solution to the two equations? Equation 1 and equation 2 have no solutions. Equation 1 has no solution and equation 2 has

    asked by HELP PLEASE on October 5, 2014
  18. Factoring

    What does 3x^3-3x+2=0 come out to? How would I solve this? Is the x cubed supposed to be x squared? You can compare the equation with the identity: (a+b)^3 = a^3 + 3 a^2 b + 3 a b^2 + b^3 which you can rewrite as: (a + b)^3 = 3 ab (a + b) + a^3 + b^3 (1)

    asked by Ace on May 30, 2007
  19. TO BOB

    use your answer to (b) to help calculate the mass and the velocity of the ball that's the part i don't understand am i suppose to use equal the formulas? YEs, equate the formulas to the numbers you were given. If I remember correctly, you were given

    asked by Kim on October 16, 2006
  20. Math

    William solves the equation 5(3x-2)=15x-2. How many solutions does he find? A.0 solutions B.1 solution C.2 solutions D.Infinitely many solutions I'm only up to making it to: 15x-10= 15x-2 I was also wondering if I did anything wrong.

    asked by Rabie on April 2, 2015
  21. Maths

    Find the value(s) of k for which the pair of equations: Equation 1: kx + (k+1)y = 8 Equation 2: 4x + 3ky = 4 (a) no solutions (b) a unique solution (c) infinitely many solutions Can you please use the gradient way and show your working? Thanks a lot

    asked by Who knows on December 23, 2016
  22. Math help please!

    Write an equation with a variable on both sides of the equal sign that has infinitely many solutions. Solve the equation and explain why it has an infinite number of solutions. Okay so that is the question, I know it's already on Jiskha but I need it to be

    asked by Help me! on January 11, 2018
  23. maths-complex numbers

    by using the substitution w = z^3, find all the solutions to z^6 - 8z^3 +25 = 0 in complex numbers, and describe them in polar form, using @(theta) to denote the angle satisfying tan@ = 3/4 ( note simply leave @ as it is, don't calculate it). i got up to

    asked by Anonymous on March 12, 2007
  24. Writing equations from a table

    Hiiii! My teacher gave out some practice problems to help prepare for the big upcoming tEst.. I just don't remember hiw to do fhese problems.. Irs just hard for me.. these are not graded, I just need help so I can (hopefully) ace the test :) Questions!:

    asked by Bailey on January 22, 2015
  25. Algebra II?

    I am having trouble with these. I don't even know where to start: Find the exact solutions to 6x^2+x+4=0 By using the Quadratic Formula. Find the value of the discriminant for 9x^2+1=6x. Then describe the number and type of roots for the equation. Thanks

    asked by Kasey on June 24, 2008
  26. calculus

    hi im back.. solve cosx= (squareroot3)/ 2 where 0

    asked by Maria on May 8, 2013
  27. Trigonometry

    Find all solutions for the following equation in the interval 0 ≤ x

    asked by richard on May 4, 2010
  28. Check My Math Answers Please!

    1) [I don’t need any help with this question.] 2) [I don’t need any help with this question.] 3) A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y=-0.04x^2+8.3x+4.3, where x is the

    asked by Nintendon't on April 18, 2017
  29. Math

    How many real number solutions does the equation have? y=3x^2-5x-5 A)one solution B)two solutions C)no solutions D)infinitely many solutions I can't figure this question out. Any help would be amazing.

    asked by Sasha on June 1, 2015
  30. calculus help please

    dy/dx = 2y^2 Integrating...y=2/3 y^3 + C put 1,-1 into the equation, and solve for C. Then find the y for x=2 if y= a^uhttp://math2.org/math/integrals/tableof.htm see exponential functions. dy/dx=2y^2 and if y=-1 when x=1, then when x=2, y=? how do i get x

    asked by bobpursley on December 10, 2006
  31. Grade 12 Calculus

    solve cosx= (squareroot3)/ 2 where 0

    asked by Maria on May 11, 2013
  32. Algebra

    Consider the equation 4x^2 – 16x + 25 = 0. (a) Show how to compute the discriminant, b^2 – 4ac, and then state whether there is one real-number solution, two different real-number solutions, or two different imaginary-number solutions. (b) Use the

    asked by Pamela on July 7, 2009
  33. Algebra

    Consider the equation: 4x^2 – 16x + 25 = 0 (a) Show how to compute the discriminant, b^2 – 4ac, and then state whether there is one real-number solution, two different real-number solutions, or two different imaginary-number solutions. (b) Use the

    asked by Tammie on July 8, 2009
  34. math

    Find all solutions to the equation tan(t)=1/tan (t) in the interval 0

    asked by alicia otto on March 26, 2016
  35. Math

    1)How many real number solutions does the equation have? -8x^2-8x-2=0 A) One Solution B) Two Solutions C) No solutions D) Infinitely many solutions If someone could help me with this that would be great since I am confused. Thank you!

    asked by Tia on April 6, 2015
  36. math

    For sin(θ) = -0.4321, 0 ≤ θ ≤ 360°. (8) How many solutions are possible? In which quadrants would you find the solutions? Determine the reference angle for this equation to the nearest degree. Determine all the solutions to the equation to the

    asked by Sammy PLEASE HELP on August 30, 2017
  37. algebra

    For the following equation, state the value of the discriminant and then describe the nature of the solutions. -2x^2+3x-7=0 What is the value of the discriminant? Which one of the statements below is correct? The equation has two imaginary solutions. The

    asked by Becky on March 21, 2008
  38. Poem

    I wrote this poem and I was asking if it sounded good. Also it's a true poem dedicated to my deceased Grandfather. Remember when Remember when you told me That you'll always be by my side Remember when you told me Brave girls never cry Remember when you

    asked by Baby Phat on February 3, 2009
  39. Maths - crazy maths question which involves graphi

    This is a question that involves graphing although I'm not very good at it especially Trigonometric Functions >_< a) Find the equation of the tangent to the curve y = sinx at the origin For part (a) I've already found the equation its: y = 0 b) Using a

    asked by Anonymous on July 20, 2008
  40. Math ~CHECK MY WORK PLEASE~

    Hello, Please check my answers, with stars (*) are my answers! Please check if they are wrong please tell the right answer and why it is right (explain it) so I can understand why! Thanks! For questions 1-2, solve the inequality. 1.) x + 8 < -28 a~ x < -36

    asked by Jenny on January 17, 2014
  41. College Algebra

    Find all solutions of the equation. Check your solutions in the original equation. (Enter your answers from smallest to largest. Enter NONE in any unused answer blanks.) 16t^2/3 + 40t^1/3 + 25 = 0

    asked by Jack on July 13, 2013
  42. questions

    1.) Why are there usually two solutions in quadratic equations? 2.) Under what situation would one or more solutions of a rational equation be unacceptable? If putting the found "solution" cannot be put back into the original equation without violating

    asked by leleirvin on August 8, 2005
  43. Please Math

    8. p + 4 < –24 p < –20 p < 28 p < –28 p < 20 9.p/8 ≥ –5 p ≥ 40 p ≥ 3 p ≥ –13 p ≥ –40 10. –5p > –30 p > 6 p < 6 p > –35 p < 35 11. Which inequality matches the graph? 3x + 1 > 4 3x + 1 ≥ 4 3x + 1 < 4 3x + 1 ≤ 4 12. Which

    asked by Hotline Bling on December 17, 2015
  44. math, help

    What are two solutions for 3x-y=0 am i correct on this inorder to graph (0,0) and (2,6) Because the line goes through (0,0) so how do i get two solutions from that line? You can get two solutions from that line because the first solution (0,0) is from the

    asked by jasmine20 on February 10, 2007
  45. Algebra

    A physics student stands at the top of a hill that has an elevation of 37 meters. He throws a rock and it goes up into the air and then falls back past him and lands on the ground below. The path of the rock can be modeled by the equation y = -0.02x^2 +

    asked by Mathew on November 30, 2016
  46. algebra

    how many real number solutions does the equation have? 0=2x^2-20x+50 A. 1 solution B. 2 solutions C. no solutions** D. infinite solutions

    asked by zzz on April 29, 2019
  47. Math

    How many real-number solutions does the equation have? –7x2 + 6x + 3 = 0 one solution two solutions*********** no solutions infinitely many solutions

    asked by Mike on May 11, 2016
  48. precalculus

    Find all solutions for the equation 3cos(x)=cot(x). When do I use +2kpi? Is it only when I'm suppose to "find all solutions"? I got sin(x)=1/3. Is that correct?

    asked by marie darling on April 14, 2013
  49. Molarity question

    okay so in lab we made up 2 solutions of FeCl3 and KI. We varied the volumes...I was just wondering how to calculate a new concentration for those solutions. We weighed out .825g of the FeCl3 and 1.35 g of the KI. For trial one we used 20 mL of both. For

    asked by michelle on April 18, 2015
  50. Chemistry

    You have to prepare a pH 3.50 buffer, and you have the following 0.10M solutions available HCOOH, CH3COOH, H3PO4,CHOONa, CH3COONa, and NaH2PO4. a) What solutions would you use? b) How many milliliters of each solution would you use to make approximately 1

    asked by Caitlin on April 21, 2015
  51. math

    First try to solve the equation by factoring. If you are unable to solve the equation by factoring, solve the equation by using the quadratic formula. For equations with solutions that are irrational numbers, give exact solutions and approximate solutions

    asked by anonymous on September 27, 2018
  52. math

    how many real number solutions does the equation have y = -4x^2 + 7x - 8 no solutions (is it this one) one solution two solutions infinitely many solutions

    asked by nisa on March 28, 2014
  53. Algebra

    Find a quadratic equation that has the numbers below as solutions. 1. 1/2,-10 2. 2/3,-5/7 How do I even do these problems? Those solutions are so hard to find.

    asked by Anonymous on March 21, 2014
  54. ph+chem#2

    Hey, can you help me on this last question. I don't understand how I can figure it ouyt without any indicators or solutions. Please help! 13. Three solutions labelled A, B, and C are known to have pH values of 4.0, 6.5, and 8.0. Write an experimental

    asked by Bobby on August 4, 2006
  55. Math check

    Decide whether each equation has one, no solutions, or infanatly many solutions 1.) 2(x - 3) = 2x One solution no solutions many solutions infinatly many solutions 2.) 3(y - 3?) = 2y - 9 + y One solution no solutions many solutions infinatly many solutions

    asked by Josh on January 8, 2014
  56. maths

    how do i find out the the equation of the line of symmetry for f(x)=ax^2+bx+c ? please explain it do me thanks! The line of symmetry runs through the vertex. so the x of the vertex is -b/(2a) and the equation of the line of symmetry is x = -b/(2a) e.g. for

    asked by Emma on May 25, 2007
  57. Algebra 1

    Explain why the two equations below have the same solutions. x + 3y = −1 −2x − 6y = 2 A. The two equations have the same slope, so they have the same solutions. B. The second equation is a multiple of the first equation, so they have the same

    asked by Sanjay Gupta on April 24, 2016
  58. Math/College Algebra

    1.)Complete the square to find all real solutions of equation 3 x^2 + 4 x - 1 = 0. X1= X2= 2.)\sqrt{7 x - 9} + 6 = 3x there are two solutions 3.)4

    asked by Jordan on August 29, 2010
  59. trig

    how can i find all the exact solutions to the equation : 2cos^2x + 3sinx = 3 the solutions have to be between [0,2pi)

    asked by Joe on July 18, 2009
  60. college

    Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form ax^2 + bx + c =0 The solutions are -10, 3 The equation is blank = 0

    asked by Dana on September 4, 2009
  61. Math

    1. Solve the Following equation: 3(x-7)-x=2x-21 a. 7 b. -2 c. infinitely many solutions d. no solution 2. Solve the Following equation: 4=2y=9+2y a. 4 b. -4 c. infinitely many solutions d. no solution Can someone walk me through how to do these please? I

    asked by Vae on September 22, 2015
  62. Algebra

    The following equation has three solutions. Look for the greatest common factor, then use the quadratic formula to find all solutions. 10t^5 + 5t^4 = 50t^3

    asked by Merty on April 27, 2015
  63. Language Arts

    Can these be checked? • What differences became matters of life and death during the Holocaust? • Do differences between people necessarily lead to conflict? • How can the Holocaust help us find similarities that go beyond race, culture, nationality,

    asked by EmberShy on February 27, 2017
  64. pre calculus

    Find all of the solutions of the equation x^4-625i=0 and represent the solutions graphically.

    asked by Cain on November 26, 2016
  65. Math

    For the following equation, state the value of the discriminant and then describe the nature of the solutions. -9x^2+6x-2=0 what is the value of the discriminant? Which one of the statements below is correct? A) the equation has two imaginary solutions. B)

    asked by Allison Anderson on November 29, 2011
  66. Chemistry

    For each of the following, write a net ionic equation (modeled above). Wherever there is a precipitate, state the name of the precipitate (e.g “lead iodide” from above). Pop onto the net and see if you can find a description of the physical properties

    asked by Noelle on September 2, 2010
  67. 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
  68. algerba

    What is the value of the discriminant, b2 − 4ac, for the quadratic equation 0 = −2x2 − 3x + 8, and what does it mean about the number of real solutions the equation has? What are the solutions to the quadratic equation 4(x + 2)2 = 36 Mischa wrote the

    asked by chelsie on May 25, 2016
  69. Algebra

    I have some problems that I am having trouble with and I have some that need checking please. Thanks! Solve the equation. 4. (x+7/4)=2(x-1/6) Find all the value(s) of x that make thedenominator(s) zero. Then solve the equation. 6. (x-8/2x) +5= (x+6/x)

    asked by Soly on August 21, 2007
  70. Math 111

    Use the discriminant to determine the number and type of solutions for the given equation. Either A, B, C, OR D 2x^2 = 7x - 8 A One (repeated) rational solution B Two irrational solutions C Two imaginary solutions D Two rational solutions

    asked by Anonymous on April 2, 2010
  71. Chem-Ionic & Net equations

    When the following solutions are mixed together, FeSO4 (aq) + Csl (aq): What is the balanced equation? What is the complete ionic equation? What is the net ionic equation? I don't know how to balance these problems, can someone please show me how to solve

    asked by ASA on April 13, 2012
  72. Writing equations from a table

    Hiiii! My teacher gave out some practice problems to help prepare for the big upcoming tEst.. I just don't remember hiw to do fhese problems.. Irs just hard for me.. these are not graded, I just need help so I can (hopefully) ace the test :) Questions!:

    asked by Bailey on January 22, 2015
  73. algebra

    Explain how you find ordered-pair solutions of the equation 3x - 5y =15, and then find two such solutions.

    asked by lucy needs help now on February 12, 2012
  74. algebra

    Explain how you find ordered-pair solutions of the equation 3x – 5y = 15, and then find two such solutions.

    asked by lucy on February 10, 2012
  75. Math

    Solve the given quadratic equation exactly using the quadratic formula. Write the solutions in its simplest form. Using a calculator, determine all irrational solutions to the nearest thousandth. Separate the solutions with a comma and list the smaller one

    asked by Sam on September 23, 2014
  76. Math

    Solve the given quadratic equation exactly using the quadratic formula. Write the solutions in its simplest form. Using a calculator, determine all irrational solutions to the nearest thousandth. Separate the solutions with a comma and list the smaller one

    asked by Jade on September 23, 2014
  77. math

    2{[5(c-4)+15]-[3(5c-3)+1]} Can someone help me to figure out this equation. I don't remember how to do this with the outside brackets

    asked by jen on November 23, 2009
  78. Math

    Find 2 solutions to the equation 3x+5y=10. Write the solutions as ordered pairs. This is on my math study guide for our final and she already took up our text books. please help me!

    asked by Gaby on May 31, 2009
  79. Math (Calc)

    Find all solutions to the following equation on the interval 0

    asked by Bryan on December 9, 2007
  80. Pre-Algebra

    Equation M: y = 3x + 4 Equation P: y = 3x + 7 Which of the following options is true about the solution to the given set of equations? No solution One solution Two solutions Ininite solutions I thought it was infinite solutions but i got the answer wrong.

    asked by Anna on March 20, 2015
  81. trig

    2sin(x)cos(x)+cos(x)=0 I'm looking for exact value solutions in [0, 3π] So I need to find general solutions to solve the equation. But do I eliminate cos(x), like this... 2sin(x)cos(x)+cos(x)=0 2sin(x)cos(x)= -cos(x) 2sin(x) = -1 sin(x) = -1/2 at 4pi/3

    asked by Alex on March 23, 2008
  82. Algebra 1

    Find the roots of each quadratic polynomial. 1. 16x + 40 + 2x^2 A: No real solutions? Solve. Round to the nearest hundredth. 2. 12 = 5x^2 A: 12 = 5x^2 12 / 5 = 5x / 5 12/5 = x^2 ±2√3/5 = ±√4x3/5 = ±√12/5 = x x = ? (Supposedly, the answer to this

    asked by Victoria on May 9, 2014
  83. Math

    How would you graph an equation like x+y=4 or y-1=-1x-2? I know you have to change the form, i just don't remember how to do it.

    asked by Elizabeth on January 23, 2014
  84. Math

    How would I solve this...I don't get it. Two solutions of an equation are (6,5) and (8,5). What could the equation be?

    asked by Tim on April 3, 2011
  85. Algebraic

    Determine the roots of the quadratic equation by completing the square. Solve for exact solutions and approximate solutions. Check your solutions. Y=x2-6x-12

    asked by rian on March 29, 2016
  86. Math

    If a 20 inch pully runs at 350rpms, what size does the second pully have to be to run at 3500rpms? I Don't remember the equation all I am looking for is the equation please

    asked by Charlie on September 2, 2015
  87. Algebra 1

    Use the graph of f(x) to find the solutions to the equation f(x)=0 a-2 -10 & 2 b_ 2 10 & -2 c- 1 10 d- no solutions

    asked by Steve on March 27, 2015
  88. Math

    The difference between the solutions of the equation 5x^2−x−k=0 is 1.8. Find the solutions.

    asked by Anonymous on January 20, 2019
  89. algebra

    this is algebra review but I can't remember how to solve this at all. I need to graph this equation.. 3x=2y-7 I don't know how to get the Y by itself

    asked by michelle on September 1, 2011
  90. Math Please help me and fast

    13. Describe the number of solutions for the equation. 10(x-2)=10x A.) one solution B.) no solution C.) infinite solutions*** 14. Describe the number of solutions for the equation. -2(y-3)=2y-6 A.)one solution B.)no solution*** C.)infinite solutions 18.

    asked by Aaliyah on February 8, 2016
  91. MATH

    use the discriminant to determine whether the following equation have solutions that are : two different rational solutions : two different irrational solutions : exactly one rational solution : or two different imaginary solutions 7+5z^2=-8z

    asked by LIZY on March 26, 2013
  92. algebra

    how many real number equations does this equation have? 0= -7x^2+6x+3 A. 1 solution* B. 2 solutions C. no solutions D. infintie solutions

    asked by zzz on April 29, 2019
  93. algebra II

    How do you know if a quadratic equation will have one, two, or no solutions? How do you find a quadratic equation if you are only given the solution? Is it possible to have different quadratic equations with the same solution? Explain. Provide your

    asked by Nadia on October 7, 2008
  94. algebra II

    How do you know if a quadratic equation will have one, two, or no solutions? How do you find a quadratic equation if you are only given the solution? Is it possible to have different quadratic equations with the same solution? Explain. Provide your

    asked by hollywood on June 15, 2010
  95. Algebra

    It's been a while since I've had to do this so I don't remember. I have the equation 6x + 19 = x. They want me to solve for x. I'm guessing I have to move over 19 to make it the sum, but how do I do that?

    asked by Adam on September 10, 2018
  96. Chemistry

    Use the henderson-hasselbalch equation to predict the change in pH when 0.50ml of 1M HCl is added to 40mL of .10M buffer at pH 6 and pH 7.5. My two solutions are Na2HPO4 and NaH2PO4.pKa=7.2 Now I don't even know where to begin and how to use the equation.

    asked by Heidi on September 16, 2017
  97. Trigonometry

    Use inverse trigonometric functions to find the solutions of the equation that are in the given interval, and approximate the solutions to four decimal places. (Enter your answers as a comma-separated list.) cos(x)(9cos(x) + 4) = 4; [0, 2π)

    asked by Katlynn on March 6, 2013
  98. Chemistry Lab

    So we prepared 100mL of .1M solutions of these solutions, and found the pH and H+ contents: pH H+ HCl: .57 .270 HNO3: .58 .260 H2SO4: 1.29 .051 HC2H3O2: 2.44 .0036 H2C2O4: .84 .145 HKC6H4(CO2)2: 4.13 7.41 Now I'm stuck on this question. What conclusions

    asked by Adrianna on March 21, 2011
  99. math

    State the solutions, or estimated solutions, to each quadratick equation. We have equation is x^2-9x+20.25=0 and the graph is y=x^2-9x+20.25 Not sure how to figure this one out. I assume I just solve the equation and not the graph to get the ordered pairs?

    asked by m on January 12, 2011
  100. Math help

    Write an equation with a variable on both sides of the equal sign that has infinitely many solutions. Solve the equation and explain why it has an infinite number of solutions.

    asked by Katalina on January 14, 2014

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  1231. 1231
  1232. 1232
  1233. 1233
  1234. 1234
  1235. 1235
  1236. 1236
  1237. 1237
  1238. 1238
  1239. 1239
  1240. 1240
  1241. 1241
  1242. 1242
  1243. 1243
  1244. 1244
  1245. 1245
  1246. 1246
  1247. 1247
  1248. 1248
  1249. 1249
  1250. 1250
  1251. 1251
  1252. 1252
  1253. 1253
  1254. 1254
  1255. 1255
  1256. 1256
  1257. 1257
  1258. 1258
  1259. 1259
  1260. 1260
  1261. 1261
  1262. 1262
  1263. 1263
  1264. 1264
  1265. 1265
  1266. 1266
  1267. 1267
  1268. 1268
  1269. 1269
  1270. 1270
  1271. 1271
  1272. 1272
  1273. 1273
  1274. 1274
  1275. 1275
  1276. 1276
  1277. 1277
  1278. 1278
  1279. 1279
  1280. 1280
  1281. 1281
  1282. 1282
  1283. 1283
  1284. 1284
  1285. 1285
  1286. 1286
  1287. 1287
  1288. 1288
  1289. 1289
  1290. 1290
  1291. 1291
  1292. 1292
  1293. 1293
  1294. 1294
  1295. 1295
  1296. 1296
  1297. 1297
  1298. 1298
  1299. 1299
  1300. 1300
  1301. 1301
  1302. 1302
  1303. 1303
  1304. 1304
  1305. 1305
  1306. 1306
  1307. 1307
  1308. 1308
  1309. 1309
  1310. 1310
  1311. 1311