# it is an equation 9b- 4b+ 3b= 16 please write it step by step

58,075 questions, page 301
1. ## chemistry

interpret the following balanced equation into Particles, Moles, Mass: 2Al+3CuSO4== AL2(SO4)3+ 3Cu

asked by Amber on April 24, 2013
2. ## Tim

Please I need help with this algebra problem With the 3 equations f1(x)=0 f2(x)=1/8(x+16)^2-98 f3(x)=2x+24 Determine an equation for this function with the 3 pieces above.(Refer to creating the polynomial functions)

asked by Functions on November 14, 2016
3. ## calculus

Please help. How do I separate the variables in the following differential equation dy/dx=(2/27)(x-3)then square root (x^2-6x+23)/y where (y>0). Then give general solution in implicit form. Thank you so much if you can help.

asked by paul on May 19, 2011
4. ## organic chemistry

Show the reaction equation and mechanisms of a mixture of napthalene,p-nitroaniline and benzoic acid dissolved in dichloromethane?

asked by Agnes on December 2, 2010
5. ## Calculus

Use Euler's Method with three equal steps and y(1) = 1 to approximate y(1.3) for the differential equation dy/dx= x+y^2 a) 1.283 b) 1.695 c) 1.785 d) 2.943

asked by Alice on April 2, 2019
6. ## Math

Find two consecutive even integers such that the sum of the larger and 3 times the smaller is 234. I don't get how to put it as in equation.

asked by Ally on October 12, 2015
7. ## Pre-Calculus

I need help solving this logarithmic equation: ln x + ln (x+3) = 1. I know ln x + ln (x+3)=ln [x(x+3)] and that is ln x^2 + 3x when broken down. Then you have to get rid of ln by taking the natural base e of both sides so in the end you have x^2+3x =

asked by Kelsey on May 3, 2008

i need an quadratic equation for a 13 to 15 year old who mows lawns and what there profit would be if they charge $10 a yard and they mowed 5 yards a week asked by Anonymous on December 5, 2012 9. ## math Use a graphing calculator to solve the equation 3 tan=(1)/(3)è=8 in the interval from 0 to 2pi. Round your answers to the nearest hundredth. asked by Torrance on May 21, 2013 10. ## science A 0.63kg{\rm kg} mass vibrates according to the equation x=0.30cos7.00tx = 0.30 \cos 7.00 t, where xx is in meters and tt is in seconds. Determine the amplitude. asked by toto on May 1, 2014 11. ## Pre-calculus Find the center radius and equation of a circle in standard form given the following conditions: 1. Tangent to 3x+2y=0 at the point (0,0) and passing through (1,-1) and (6,0) asked by chen on July 2, 2017 12. ## Chemistry What is the molar ratio of oxygen to magnesium oxide in the chemical equation? Show work 2Mg + O2 ->2MgO asked by Alexia on March 21, 2019 13. ## maths a, b, c, A and C are real numbers that satisfy the equation (ax2+bx+c)2=Ax4+16x3+28x2+24x+C How many possible ordered triples of (a,b,c) are there? asked by hemant on May 22, 2013 14. ## trigonometry Find the sum of all of the solutions to the equation cos(2x) - sin2(x) - 1 = 0 in the interval 0 < x < 5 pi. (Use radian measure for x.) (A) 15pi (B) 0 (C) pi (D) 10pi (E) None of the above. asked by lan on May 12, 2011 15. ## Math I forgot the third equation last time so the full question is a+b+c=28 b=a+3 a+3+b+10c=131 I only got up to the part where I plug in the b but I don't know what to do with the other variables. asked by Rabie on January 12, 2016 16. ## maths solve the following system of linear equation by matrix method:- 12p+4q+17r+11s=5 14p+8q+9r+4s=8 3p+7q+2r+5s=12 5p+12q+9r+7s=7 asked by saloni on February 9, 2015 17. ## maths reciprocal I'm finding difficulty in answering this question. Any help would be appreciated. For the equation, y1= x^-5x+6 and its reciprocal: Discuss what is the consequences for y1 to 1/y1 as x --> +- infinity? Thanks in advance. asked by TK on August 24, 2008 18. ## Science Using the balanced equation for this reaction, calculate the volume of CO2 that should be produced by the decomposition of 2.21g of CuCO3•Cu(OH)2 at STP. asked by Dan on June 1, 2011 19. ## Biology 110 by means of a chemical equation, show how the body rids itself of the major end-products of metabolism. Please explain. asked by Susan Yi on October 28, 2011 20. ## Math For functions f(x) = 7x − 8 and g(x) = 7x + 8, find ⓐ (f · g)(x) ⓑ (f · g)(−2). I have F(x)*G(x)= (7x-8)(7x+8). I never really understood how this equation works. I can see the FOIL method but I don't quite understand it in this system of asked by Josh on March 25, 2019 21. ## Math Which of the following ordered pairs is a solution of the equation y = -4x². Can someone help me solve it. Could you guys also explain why that answer is. Here are the options/Answers: (-2,16) (1, -8) (0,-4) (2,-16 asked by -_- on March 26, 2019 22. ## Precalculus Transform the quadratic equation to a standard form. 4x^2-y^2-24x-10y+11=0 My answer: 4(x-3)^2 - (y+5)^2 = 0 Therefore, this is a degenerate conic section, right? asked by Anonymous on May 24, 2014 23. ## Algebra Carmen is using the quadratic equation (x + 15)(x) = 100 where x represents the width of a picture frame. Which statement about the solutions x = 5 and x = –20 is true? asked by T on June 2, 2016 24. ## Chemistry Calculate the pressure exerted by a 14.6 mol NH3g in a 3.2 L container at -15.0 celcius using the Van der Waals equation. asked by Andrea on May 15, 2013 25. ## algebra I'm working with absolute values, and for some reason I'm just really stumped by this problem. 7=|3x+9|+7 I don't see how I can get any number that will make the equation equal 7? asked by michelle on October 21, 2010 26. ## Math Jim has$87. He spends $6 for socks and at least$32 for shoes. How much does he have left to spend on shirts? I know the answer is >49 I need to find the inequality equation. Thank you

asked by Rachel on September 27, 2016
27. ## Calculus I

Show that the equation x^4 + 4x + c = 0 has at most two real roots. I believe we're supposed to prove this by proof of contradiction using Rolle's Theorem, but I'm not quite sure how to do this problem.

asked by Emily on March 5, 2012
28. ## Calculus

Find the solution of the logarithmic equation: ln(x+8)+ln(x–8)=0 Im not sure how to approach this one. I tried moving the ln(x-8) to the other side and solving for x and that did not work. I also tried putting everything as an exponent to e. please help!

29. ## physics dimention

the force of capillarity in plant is given by F=yrgh/2,where y is the coefficient of surface tension.Is this equation correct or not? justify your answer.

asked by yaro on January 8, 2016
30. ## physics

How long will it take a 1879W motor to lift a 309kg piano to a window 15.4m above? what is the equation? here are my givens P= 1879 w m= 309 kg h= 15.4 m t= ? s

asked by Anonymous on May 29, 2018
31. ## math

Find the solutions of the equation 3^x = x^4, rounded to two decimal places. (Enter your answers as a comma-separated list.)

asked by kulan on March 27, 2019
32. ## Math

Use patterns or a linear equation to complete the table. 11) x y 1 -1 3 3 5 7 10 ? 50 ? 100 ? I don't understand what I'm suppose to do! Please hep and explan well! Thank you!

asked by Valerie on April 22, 2011
33. ## Chemistry

In basic solution disproportionate to bromited bromide ions. Use the half reaction method to balance the equation.

asked by Praise on May 18, 2013
34. ## Chemistry

Is the equation of the chemical reaction that occurs when you blow your breath through boiling water? CO2 + H2O -> H + HCO3

asked by T on December 2, 2012
35. ## chemistry concentrations

Can someone please help me with the following problem? 1.Calculate the volume of 1.88 M NaI that would be needed to precipitate all of the Hg+2 ion from 482 mL of a 1.61 M Hg(NO3)2. The equation for the reaction is thank you!

asked by jamie on May 5, 2009
36. ## Kaplan University

The Linear equation y=6x-5 graphs as a horizontal/vertical/diagonal line ( choose the correct label and type it below)

asked by Marcus on February 19, 2008
37. ## Math

Find the general solution to the differential equation that models the statement:"The rate of change of P with respect to x is proportional to 15-x.

asked by Dea on February 17, 2016
38. ## algebra

Using the Gauss-Jordan method need to determine the coefficients a,b,c of the quadratic equation x=ax squared +bx+c where y is degree of like and x is the percentage of sugar y=5.4 and x=8

asked by mike on December 12, 2009
39. ## Math(Algebra)

My question is, “  A line with slope 3/2 that passes through the point (-2,0)” I have to find an equation. Can someone give me a rough explanation of how to do this, so i can figure this out? Thanks!

asked by Eric on September 22, 2018
40. ## Calculus

Solve the quadratic equation by factoring. (Enter your answers as a comma-separated list.) 5x2 − 23x = −12

asked by jay on January 24, 2017
41. ## chemistry

Use the Henderson-Hasselbalch equation to calculate the pH of a solution that is 0.140M in propanoic acid and 0.120M in potassium propanoate

asked by Anonymous on November 23, 2014
42. ## chemistry

In the Michaelis-Menten equation, KM = Ks only when the equilibrium assumption is valid. Which of the following conditions would have to be satisfied for Ks to be within 10% of KM? 1. k-1 = 0.9 × k2 2. k2 = 0.09 × k1 3. k2 = 0.9 × k-1 4. k-1 = 9.0 × k1

asked by Jerry on April 3, 2010
43. ## algebra. help!

Find the slope of a line that passes through (-2,-3) and (1,1). a. 1/3 b. 1 c. 2 d. 4/3 For the equation -4y=8x, what is the constant of variation? a. -4 b. -2 c. 1 d. 2 Suppose y varies directly with x, and y=24 when x=8. What is the value of y when x=10

asked by Hannah on November 20, 2014
44. ## trig

Find the sum of all of the solutions to the equation cos(2x) âˆ’ sin2(x) âˆ’ 1 = 0 in theinterval 0 < x < 5 pi. (Use radian measure for x.) (A) 15pi (B) 0 (C) pi (D) 10pi (E) None of the above.

asked by minh on May 7, 2011
45. ## Chemistry

asked by Liselle on November 7, 2016
46. ## maths

Find the equation to the cone whose vertex is the point (a,b,c) and whose generating lines intersects the conic px2 + qy2 = 1, z = 0.

asked by mukesh on January 20, 2018
47. ## Calculus

Find the limit as x approaches 0+ of (lnx)/x using L'hospitals rule. When I do this, I keep getting stuck at 1/0 when you plug back into the equation after doing l'hospital once.

asked by Callie on November 4, 2015
48. ## Science

using the equation c3h5+5o2=3co2+4h2o, calculate the mass of c3h8 that can produce 100g of h2o

asked by Abednego on March 14, 2016
49. ## CHEMISTRY

Balance the oxidation reduction equation in half reaction PbO2 + KCl => KClO + KPb(OH)3 thank you a lot

50. ## Chemistry

Calculate the enthalpy change for the following equation: NO(g)+ 1/2O2(g) -----> NO2(g) I have no clue how to do this. I just know the answer is supposed to be approximately -57.2 kJ. Can some explain to me what to do?

asked by Ana on March 28, 2010
51. ## statistics

Using the regression equation ŷ = .3 + .12x, the predicted weekly food cost for a hedgehog weighing 1.3 pounds is __________.

asked by cat on June 24, 2015
52. ## medical electronics

Which of the following equation defines Wiener filter in frequency domain (Sd and Sm represent the PSDs of desired signal and noise respectively) W(ω)=Sd(ω)Sd(ω)+Sm(ω) W(ω)=Sd(ω)+Sm(ω)Sm(ω) W(ω)=Sd(ω)−Sm(ω)Sm(ω) W(ω)=Sd(ω)Sd(ω)−Sm(ω)

asked by biomedical signal processing on February 12, 2018
53. ## calculus

I need help solving the following problem. Could someone please help me and explain how to work the equation. Thanks in advance. [intergral x sqrt3x dx I hope this makes sense

asked by Jedidiah on December 11, 2012
54. ## Algebra

The value, V, of Kalani’s stock investments over a time period, x, can be determined using the equation V=75-(0.80)^-x What is the rate of increase or decrease associated with this account?

asked by Junior on July 11, 2014
55. ## Math/Algebra

Does anyone know how to graph quadratic functions (with parabolas). Could someone please help me!!Could you help me with these two problems don't forget to make a chart for x, the equation, the y, and the coordinates. 1. Y=2x^2 2. Y=-5x^2

asked by Smores on March 30, 2009
56. ## Algebra

Find a linear equation whose graph is the straight line with the given property. HINT [See Example 2.] Through (2, −3) and (1, 1) Which formula do I use? y2-y1/x2-x1 or y-y1=m(x-x1)[

asked by Rick on February 19, 2012
57. ## math

A student claims that the equation Ö(-x) = 3 has no solution, since the square root of a negative number does not exist. Why is this argument wrong?

asked by alicia on December 7, 2009
58. ## Math-Quartic Equation

Reduce this equation using the quadratic formula, factoring, or other algebraic method to determine the other zeros of the function. F(x)= 4x^4 - x^3 - 11x^2 -2x +6

asked by Ash on October 28, 2012
59. ## algebra 2

2X^4-9X^3+3X^2-X-5=0 Given that one root is 2+i, solve the equation. So far I have it set up like this: 2X^4-9X^3+3X^2-X-5/X^2-4X+5 I don't know how to get the answer, I know that I have to use long division but when I started to try it I kept getting

asked by Jessica on January 27, 2011
60. ## Math

x2+y2+z2-x(al1+bl2+cl3)-y(am1+bm2+cm3)-z(an1+bn2+cn3)=0 solve this equation

asked by Ravi on October 25, 2017
61. ## calculus

from the equation: x^4 - i = 0 x^4 = i how do you get: The solutions are the fourth roots of i = cos(pi/2) + isin(pi/2) I don't understand how you get pi/2? please full and detailed explanation please.

asked by Dom on April 14, 2008
62. ## Analytic Geometry

Please help me to solve this problem. Find the equation of the locus of a moving point if the sum of the slopes of the line joining it to (1,3) and (4,-2) is 1.

asked by xavier on December 13, 2012
63. ## Chemistry

When 320.62 grams of Bi2O3 react with excess of C, how many moles of Bi form? I know I need to use stoichiometry, but I can't quite seem to get the correct balanced equation.

asked by Brooke on June 30, 2011
64. ## chemistry-Chemical Formulas And Reactions

What is the balaced equation for the decomposition of aluminum chloride? 2AlCl3==> 2Al + 3Cl2 if it simply decomposes and nothing else is added.

asked by chrissy on January 4, 2007
65. ## Pre-Calculus

x^4-16x^3+90x^2-111x+173 When I put this equation into the graphing calculator, I get a parabola. I'm not sure how to find the zeros. Can you help?

asked by muffy on September 8, 2009
66. ## algebra

What is the maximum velocity of a roller coaster when the height is 203 feet. Can the problem be solved by factoring the following equation? t^2 -2t-11=0?

asked by Anonymous on November 5, 2014
67. ## Gen Chemistry

What is the balanced chemical equation for the galvanic cell reaction expressed using shorthand notation below? Al(s)|Al3+(aq)||Ni2+(aq)|Ni(s)

asked by Bab aba on April 18, 2010
68. ## Chemistry

How do I set up my equation to determine what the pH will be when the concentration of Fe^3+ is reduced to 10^-7? The previous part of the question had me find what the pH would be for the Fe(OH)3 to precipitate at 0.20 M. which i found was 1.37

asked by Carl on November 8, 2010
69. ## College Physics

At what voltage would a 9 μF capacitor have the energy to lift 3 grams by 1 cm? i understand i need the0.5CV^2 equation however I don't know how to answer this

asked by mike on September 1, 2016
70. ## AP CALCULUS

What is an equation of the line tangent to the graph of f(x)=x2(2x+1)3 at the point where x=-1? (that's x squared (2x+1)cubed) I'm having trouble finding the derivative:f'(x)which would be the slope (m).

asked by Naz on November 7, 2010
71. ## physics

A hypothetical planet has a radius 2.1 times that of Earth, but has the same mass. What is the acceleration due to gravity near its surface? What equation should i use?

asked by Haley on December 13, 2010
72. ## chemistry

How many milliliters of 0.300 solution are needed to titrate 2.438 of according to the equation below? I_2+2S_2O_3^-2->S_4O_6^-2+2I_-

asked by Sarah on October 7, 2010
73. ## math

Solve the quadratic equation by factoring. (Enter your answers as a comma-separated list.) 25x^2 + 30x + 9 = 0

asked by anonymous on September 26, 2018
74. ## math

find an equation of the line having the given slope and containing the given point express your answer in the form x=a,y=b,ory=mx+b m=-2,(5,0) Do not understand this question.

asked by vera on September 6, 2009
75. ## Chemistry

Identify the balanced net ionic equation for the reaction 2Na3PO4(aq) + 3CaCl2(aq)¨ 6NaCl(aq) + Ca3(PO4)2(s)

asked by Dan on April 8, 2010

Translate the following sentence into a mathematical equation: "The area, A, of a circle is the product of the number pi and the square of the radius, r." A=pi X r^2 Is this correct?

asked by Hannah on September 19, 2010
77. ## chemistry

How many grams of chlorine gas could be produced by the decomposition of 58.5g of sodium chloride according to the following equation.? 2NaCl = 2Na + Cl2

asked by Jenna on December 14, 2011
78. ## math

Use a matrix equation to solve the system of equations. 6x + 2y = 11 3x - 8y =1 My textbook gave this example, but explained it in a really weird way and I don't understand how to do it. Can someone help?

asked by Charly on December 21, 2018
79. ## algebra2

Plz Explain how to use a graphing calculator to solve the equation: x(x^2+2)=15. Then state the solution rounded to 2 decimal places.

asked by britteny on January 11, 2007
80. ## Math

Use a graphing calculator to solve the equation -3cost=1 in the interval from.0

asked by Steve on October 18, 2017
81. ## trig

Use substitution to determine whether the given x-value is a solution of the equation: sinx = -3sqrt/2, x=4pi/3 A) Yes B) No C) More information is needed D) The problem is indeterminate

asked by Steve on December 17, 2009
82. ## trig

Use substitution to determine whether the given x-value is a solution of the equation: sin x = -2sqrt3/3, x=4pi/3 A) Yes B) No C) More information is needed D) The problem is indeterminate

asked by Steve on December 17, 2009
83. ## math 1

explain what the solution to the equation f(x)=g(x) means, both graphically and algebraically. I have no idea what this question is asking but like I do know that f(x) has to do with next now rules correct? Please help im desperate

asked by jaedin on December 13, 2017
84. ## Calculus

I was wondering how to find the x and the y intercepts of the following equation y = xe^(-x^2/2) I know for a fact that the intercept is through 0,0 but I don't know how to do this long hand. When x is zero, y is zero, and vice versa.

asked by Thomas on December 10, 2006
85. ## ALGEBRA again !

need help solving this word problem, converting from words to an equation 48 equals a number increased by 6, and the sum, all multiplied by 5.

asked by Rose on October 9, 2008

I need to find the ionic equation of: 3Ba(OH)2(aq)+2H3PO4(aq)->Ba3(PO4)2+6H20(l) I'm totally lost on this question

asked by KELLY on October 4, 2010
87. ## Analytic Geometry

Express by an algebraic equation the statement that the line joining P(x,y)to the point (12,-5) has an inclination of arctan 1/3. Pls. answer

asked by Jean on December 11, 2010
88. ## algebra 2

2X^4-9X^3+3X^2-X-5=0 Given that one root is 2+i, solve the equation. So far I have it set up like this: 2X^4-9X^3+3X^2-X-5/X^2-4X+5 I don't know how to get the answer, I know that I have to use long division but when I started to try it I kept getting

asked by Jessica on January 27, 2011
89. ## Algebra 2

Using Equations The second angle of a triangle is three times the first and the third is 12 degrees less that twice the first. Find numbers for angles. I do not understand how to solve this equation.

asked by Kym on September 22, 2011
90. ## College Algebra

what is the equation involving sine that models a periodic function with an amplitude of 2, a period of 2ð/3, and a horizontal shift of 3.5 units?

asked by jared on May 4, 2016
91. ## math

Let f be the invertible linear transformation represented by the matrix A = (-2 -3 2 -3) Find in terms of x and y the equation of the image f(C) and of the unit circle C

asked by s17 on February 5, 2017

What rate would it take to double an object valued currently at $100 in 6 years? I would like to know the answer and the equation/steps taken to solve the problem. asked by Andrew on March 23, 2010 93. ## physics Find the wavelength (in nm) of a photon whose energy is 5.90 x 10-19 J. I understand that I have to use this equation to figure out the problem E=nhf, I just keep getting the wrong answer. Which is 33.68 nm asked by Beth on July 21, 2012 94. ## More art papers Out of these, which would be the easiest to write a 2 page paper on the life, times, and work of: Jacques-Louis David Eugene Delacroix Claude Monet Pierre Auguste Renoir Mary Cassatt Auguste Rodin Paul Cezanne Vincent van Gogh Winslow Homer Henri Matisse asked by Claire on February 15, 2007 95. ## math 1. Solve for the indicated letter D=4e, for e The solution is e= 2. G(x) = 6/(6-5x) Choose the correct domain below {x|x is a real number and x ≠0} {x|x is a real number and x≠6/5} {x|x is a real number and x≥6/5} {x|x is a real number and x ≠6} 3. asked by Letty on September 8, 2009 96. ## physics Mere and Ruth investigated the relationship between the applied force, F, and the extension, x of a spring. The results they obtained are shown in the table below. Force, F (N) Extension, x (m) 0.0 0.0 2.0 0.033 4.0 0.066 6.0 0.099 8.0 0.132 10.0 0.165 asked by Kate on October 17, 2007 97. ## Principle of Marketing Requirement 3: Television or Radio Advertisement (20 Points) For this requirement, each team will create a storyboard or script for a television or radio advertisement. An average radio or television ad is about 30 seconds, so have that in mind. You can asked by Kiara on July 19, 2014 98. ## Math An investment broker wants to invest up to$20,000. She can purchase a type A bond yielding a 10% return on the amount invested, and she can purchase a type B bond yielding a 15% return on the amount invested. She wants to invest at least as much in the

asked by Ally on September 28, 2013
99. ## Chemistry

Can you explain the process for solving this problem (this one is more complicated than the example in our book): A solution contains both I^- and Cl^-, each at a concentration of 3.0x10^-2M. What concentration of Pb^+2 is required to precipitate the

asked by Lacey on February 19, 2007
100. ## programming

Design a class named Book that holds a stock number, author, title, price, and number of pages for a book. Include a method that sets all the data files and another that prints the values for each data field. Create the class diagram and write the

asked by hazy on September 1, 2011