equation...?
Q. write an equation for the vertical lines passing through (2,7) x, y coordinates. anyone??
Asked by donnam4863 - Thu Feb 8 14:43:15 2007 - - 4 Answers - 0 Comments

A. Verticle means slope is so the form is x=c. since the point we are given has x=2, the equation is x=2
Answered by yupchagee - Thu Feb 8 14:51:59 2007

EQUATIOn................. ..?
Q. P = 2(l + b) make b the subject of the equation
Asked by andrew - Sun Jun 22 06:47:35 2008 - - 8 Answers - 0 Comments

A. if you mean solving for b then... P = 2(l + b) P= 2l + 2b P - 2l= 2b 1/2p - l= b
Answered by brian - Sun Jun 22 06:52:15 2008

What is the equation for the energy needed to operate a bicycle?
Q. I saw in a magazine an equation that detailed the forces for the operation of a bicycle. I can't determine what the equation is because I know nothing about kinetic mathematics or advanced algebra. This is for a tattoo I want to do. There is an equation I know it, I saw it in Tattoo Magazine or somewhere
Asked by scatterbrainedgenius - Wed Aug 19 12:57:37 2009 - - 4 Answers - 0 Comments

A. I tried deriving this: A bike is in static equilibrium, that is it will not fall left or right because it is in forward motion. So start with motion:length over time times mass.l/s*m Umm I forget the rest, I'll see if I can find something found something! lots of lowercase greek letters, you're in trouble
Answered by mike c - Wed Aug 19 13:07:40 2009

How to find equation of tangent to a circle given equation of circle and external point?
Q. I have the equation of the circle, and the external point. I know the radius of the circle and its centre. So how can i find the equation of the tangent? Thanks
Asked by Ed - Sun Nov 15 11:39:53 2009 - - 1 Answers - 0 Comments

A. See Let r radius of your circle A = center of circle at origin as shown B = point outside of circle on x-axis as shown C = tangent point. So ABC is a right triangle with hypotenuse = AB, leg AC = r, ABC = = asin(AC/AB), C = (r sin , r cos ), and the tangent line is: y = -x tan + r/cos See
Answered by I'm with Stupid - Tue Nov 17 22:14:42 2009

What is the balanced equation and the word equation of the following?
Q. What is the balanced equation and the word equation of the following? The Reaction is when Copper (II) Sulfate Hydrate crystals (CuSO4.5H2O) is HEATED until it is turned into Copper (II) Sulfate+Water. The other reaction is the REVERSE of this reaction. When water is added to Copper (II) Sulfate (the anhydrous salt) to turn into CuSO4.5H2O. Any help on the following would be GREATLY appreciated!
Asked by This Sentence Has 32 Characters! - Sun Dec 16 12:18:47 2007 - - 1 Answers - 0 Comments

A. CuSO4.5H2O + heat >> CuSO4 + 5H2O CuSO4 + 5H2O - heat >> CuSO4.5H2O
Answered by Dr.A - Sun Dec 16 12:31:42 2007

How to find the Cartesian equation when given the polar equation?
Q. I'm not sure of the process to find the Cartesian equation. My book has examples of how to solve it but none are similar to this question. If you could show me the steps that'd be great! Find the Cartesian equation: rcos(theta)=6 Thanks!
Asked by Jackie - Wed Jul 15 14:51:07 2009 - - 1 Answers - 0 Comments

A. x = 6
Answered by Melissa Baker - Wed Jul 15 14:56:15 2009

What equation allows conversion to the partial pressure of that gas?
Q. Given the concentration in molarity of a gas (in the gas phase) and your knowledge of gas laws, what equation allows conversion to the partial pressure of that gas? How does this differ from the concept of Henry's Law?
Asked by Kimberly L - Sun Sep 23 11:56:29 2007 - - 1 Answers - 0 Comments

A. From PV = nRT P = nRT / V = MRT since n/V =M Henry's law partial pressure(p) = kc where c = concentration and k =constant If the concentration in Henry' law is molar concentration, then k is equal to RT.
Answered by ADITYA V - Sun Sep 23 13:07:08 2007

How do i algebraically determine if an equation is a function?
Q. I've been trying for a couple hours and can't figure this thing out on my own. How do I take an equation and determine if an equation is a function: x=y^2 y=sqrt(x) y=1/x if i put these in a graph they both pass the vertical line test but the first equation is not a function while the 2nd one is. Why?
Asked by David T - Tue Aug 22 18:50:15 2006 - - 4 Answers - 0 Comments

A. it's not one-to-one. Every x value must have only one corresponding y value. In the first equation, if x=4, y can be either 2 or -2. Maybe you graphed y=sqrt(x) or accidently y=x^2 instead of x=y^2. If you want to graph it on a TI, you'd have to graph both y=sqrt(x) and y=-sqrt(x), b/c whenever you take the square root of x=y^2 you get y=+/-sqrt(x)
Answered by godmike - Tue Aug 22 18:53:30 2006

What is the chemical equation of a caffeine and ibuprofen mixture?
Q. I need a balanced equation and I would also like to know how ammonia affects it and its balanced chemical equation.
Asked by Showhib - Mon Sep 21 22:19:16 2009 - - 1 Answers - 0 Comments

A. Ya gave ma headache tale some advil und retire
Answered by june cleaver - Mon Sep 21 22:27:22 2009

How do you know if a quadratic equation will have one, two, or no solutions? How do you find a quadratic equat?
Q. 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?
Asked by Just Me - Thu Jun 24 18:52:01 2010 - - 4 Answers - 0 Comments

A. Oh no, you can't use math software to answer this! You just stumped Guillermo! When you have a quadratic equation in the form of ax^2 + bx + c = 0, then b^2 - 4ac is called the discriminant. If it's greater than 0, you have two real distinct solutions. If it's 0, you have one solution. If it's less than 0, you have no real solutions. To find a quadratic equation FOR a given solution, notice that if r1 and r2 are your two solutions, then (x - r1)(x - r2) = 0 is an equation it works for. This expands to x^2 - (r1+r2)x + r1r2 = 0. As for your other questions: yes it's possible to have two different equations with the same solution. Just take the x^2 - (r1+r2)x + r1r2 = 0 and multiply it on both sides by a constant.
Answered by Hal Roach - Thu Jun 24 18:57:38 2010

What equation can I use for this convection problem?
Q. Okay the problem was, in simple terms, an external flow problem with air flowing over a steel plate. I know all properties of the steel and the fluid such as thermal conductivity, viscosity, density, etc. Part a of the problem asked to find the rate of heat transfer which i did correctly. Now part b is to find the "corresponding" rate of temperature change of the plate temperature. What equation do I use to compute this? I just want the equation and am not going to spend all day typing in my numbers. Just please give me the equation to use.
Asked by The CLB - Tue Mar 3 12:41:00 2009 - - 1 Answers - 0 Comments

A. For the steel, Q = Cp * m * T So, if Cp (specific heat of steel) is in J/g C, and mass in g, and the Temperature is in C , then Q is in J.
Answered by wingstwo - Tue Mar 3 14:37:38 2009

How do you draw an equation on a computer?
Q. I need to draw a graph of an equation and it is too tedious to use paint, and excel spreadsheet equations don't really look right. How do you draw a graph using a computer? Plus, how are you able to post pictures on Y!Answers without using photobucket?
Asked by Kenny McCormick - Tue Sep 23 17:37:47 2008 - - 2 Answers - 0 Comments

A. Your welcome.
Answered by dylan m - Tue Sep 23 17:41:38 2008

How to set up the equation for finding the Arc length and Circumference of a circle?
Q. Given: Circle with a radius of 6 and a sector with an area of 12 Pi. Please, how would you set up the equation to find the Arc length of the sector? Given: Circle with a sector that has an area of 24 Pi and a radius of 11. What should the equation look like for finding the circumference of the circle?
Asked by evolssik - Thu Apr 22 03:07:36 2010 - - 1 Answers - 0 Comments

A. 1. Area of the circle: A = pi * r^2 = pi * 6^2 = 36 * pi The area of the sector is 12 * pi which is 1/3 of the whole circle. The whole circumference is 2*pi*r = 2*pi*6 = 12*pi, so 1/3 of that is 4*pi 2. C = 2*pi*r = 2*pi*11 = 22*pi =~ 69.1
Answered by Jeff Aaron - Thu Apr 22 03:28:35 2010

What is a really complicated equation i can ask somebody?
Q. My friend thinks hes really good at maths and can solve any equations. What is a really hard and complicated equation i can ask him?
Asked by usa_fox1234 - Wed Dec 20 14:05:14 2006 - - 8 Answers - 0 Comments

A. well i asked this question a while ago--- a+b+c=4 a^2+b^2+c^2=10 a^3+b^3+c^3=22 find the values of a, b ,and c It is REALLY hard clue: cubic polynominals...??!!
Answered by rahbonzy - Wed Dec 20 14:25:32 2006

How do I write the equation for the plane perpendicular to the xy plane going through y=x?
Q. Basically, I need the equation in the form ax + by + cz + d = 0. Again, it is the plane perpendicular to the xy plane, and cutting through the xy plane on the line y=x. This is part of a bigger problem to do with stereographic projection, and I am just kind of having a mental block on how I write the equation for planes! Pretty pathetic considering I'm a math major lol Is it just the plane y=x?
Asked by daniel o - Sat Feb 27 16:33:45 2010 - - 1 Answers - 0 Comments

A. If that plane is perpendicular to the xy plane, it is parallel to oz and its equation does not contain z. So you already have it, think a little
Answered by jean-de-la-lune - Sat Feb 27 16:37:22 2010

What is the equation for a Sodium hydrogen carbonate reaction?
Q. And how can we tell from this equation that it removes acid?
Asked by Siren Productions - Tue Feb 5 16:52:01 2008 - - 1 Answers - 0 Comments

A. NaHCO3 + HCl --> NaCl + H2O + CO2 where did the acid go?
Answered by skipper - Tue Feb 5 16:56:07 2008

What is the equation to prove that hydrochloric acid is present in excess?
Q. Hi When you react 0.2g of CaCO3 with 100cc of HCl (1mol/l), ahat is the equation to prove that hydrochloric acid is present in excess? Thanks TJ
Asked by Trudy M - Sat Jun 28 05:11:53 2008 - - 2 Answers - 0 Comments

A. How about this equation: pH = -log[H+] The pH of 1M HCl is zero. When all of the HCl is consumed by an excess of CaCO3 the pH rises rapidly. The excess carbonate ions in solution react with water to make the solution basic. CO3= + HOH --> HCO3- + OH- So if you have an excess of HCl then the pH will be quite low which of course you can measure with a pH meter, and that tells you that you have a large concentration of excess hydrogen ions. pH = -log[H+]
Answered by pisgahchemist - Sat Jun 28 06:42:57 2008

What is the difference between an equation and an expression?
Q. What is the difference between an equation and an expression? Include an example of each. Can you solve for a variable in an expression? Explain. Can you solve for a variable in an equation? Explain. Write a mathematical phrase or sentence.
Asked by Valerie C - Tue Jan 15 15:28:10 2008 - - 6 Answers - 0 Comments

A. An expression is a description of a mathematical object (some class or set). So, 4 is an expression describing the class of all sets of four objects, for example. An equation is an assertion (whether right or wrong) that one expression refers to the same class as another. Therefore, 2+2=4 is a claim that, if we work out what class the expression 2+2 is, it will be the same as the class 4. This equation is true, of course. If an equation includes variables, you can have an equation that is sometimes right or sometimes wrong. For example, the equation x+2=5 is true if x happens to refer to the class 3, and is false otherwise. On the other hand, the equation x+2 = x+2 is true always. Such equations are called identities. The whole… [cont.]
Answered by acafrao341 - Tue Jan 15 15:36:46 2008

What is the equation of an ellipse in polar coordinates,and how is it derived?
Q. The question is pretty much self-explanatory:I would like to derive the equation for an ellipse in polar coordinates, as I find that my graphing in polar and spherical coordinates has become a little bit rusty. The derivation is very important to me.
Asked by timothy - Wed Jan 16 12:36:28 2008 - - 1 Answers - 0 Comments

A. a and b are constants. R(theta) = sqrt((sin theta)^2 * a^2 + (cos theta)^2 * b^2)
Answered by talr - Wed Jan 16 12:43:45 2008

What is the equation for get the volume of a liquid in liters?
Q. Is there an equation for it or do you have to go through a series of them? Please help! I keep seeing ones for oval or cone shaped what about a rectangular shape? If there's a general one that'd be nice too. Help please!
Asked by .* teee - Fri Sep 26 08:23:30 2008 - - 2 Answers - 0 Comments

A. If.. you fill a rectangular tank (um say it's 50cm long, 20cm wide and 60cm tall) up to the brim with liquid, then the volume of the liquid in centimeters cube will be 50 x 20 x 60 = 6000cm3. 6000cm3 is equivalent to 6000millilitres, so I guess you can convert that 6000millilitres to litres from here. (1 litre=1000millilitres) Is this what you're looking for? Really sorry if I'm not answering your question!
Answered by Jaylynn - Fri Sep 26 08:37:36 2008