I need help on maths homework questions?
thats not asking for help, thats asking to do your homework for u
How do I solve this math question?
First let's try to develop a general theory for these kinds of questions. So lets consider a general equation of Conic section which is [math]ax^2+2hxy+by^2+2fx+2gy+c = 0[/math]Rearrange this equation as [math]ax^2+2x(hy+f)+(by^2+2gy+c) = 0 [/math]Solving for the [math] x[/math] we have [math]x= \dfrac{-2(hy+f)\pm2\sqrt{(hy+f)^2-a(by^2+2gy+c)}}{2a} [/math]Now if we want that given equation should have linear factors then this also means that above expression should have linear relationship between [math]x[/math] and [math]y[/math]. Now for this to happen the term under square-root should be a perfect square.[math]\implies (hy+f)^2-a(by^2+2gy+c)[/math] should be perfect square Simplifying this equation and we will get [math](h^2-ab)y^2+2y(gh-af)+(g^2-ac) = 0 [/math]Now this equation will be a perfect square if it has only one root i.e it's discriminant is zero.[math]\implies 4(gh-af)^2 - 4(g^2-ac)(h^2-ab) = 0[/math] Simplify this and we will get [math]\boxed{af^2+ch^2+bg^2-2fgh-abc = 0}[/math] Hence this condition should be true if you want to factorize any such equation into two linear factor. More neat and aesthetic form to express this condition is [math] \begin{vmatrix} a & h & g \\ h & b & f \\ g & f & c \end{vmatrix} = 0 [/math]. This is also called discriminant of Conic section . (It decides whether the given equation represent an ellipse or parabola or circle or point or hyperbola or pair of straight line. Here it represents the pair of straight line).Now come to this particular equation. (I am changing [math]a[/math] to [math]P[/math] and [math]b[/math] to [math]Q[/math] to avoid confusion).So given equation is [math]3x^2 + 2Qxy + 2y^2 + 2Px - 4y + 1[/math]. If you compare this to standard form you will find that ,[math]a= 3 , h = Q , g = P , b = 2 , f = -2[/math] and [math]c = 1[/math] So discriminant of this equation is [math] \begin{vmatrix} 3 & P & Q \\ Q & 2 & -2 \\ P & -2 & 1 \end{vmatrix} = 0[/math]Solving and rearranging this we have ,[math]Q^2+4PQ + 2P^2 + 6 = 0 [/math]Clearly [math]q[/math] is a root of quadratic equation given by [math]x^2+4Px+2P^2+6[/math]
A VAT maths question?
Do you mean 17.5% instead of 17%? A's cost already includes the VAT so you don't multiply by 1.175. A's cost with 10% discount = 90% of 11400 = 0.9 * 11400 = 10260 B's cost = 117.5% of 9000 = 1.175 * 9000 = 10575 A is cheaper by 10575 - 10260 = 315
What is the Quora policy or norms about homework questions?
I wanted to ask this question, but found that it has already been asked, and here it has also been answered by an authority: Adam D'Angelo. But he essentially says there is no official Quora policy on homework questions. This leaves the "policy" on homework questions open to individual Quorans, so I will tell you mine: if I think a question appears to be likely to be a homework question, then I click "answer later" and wait at least a few days. That way, if j answer the question, then I'm helping someone learn something useful. But the original questioner does not get to use it for a grade (unless someone else answered it while I was "holding back"), because it's likely to be beyond the due date. Of course, if the OP was not asking a homework question, and has not received a correct answer from someone else before I give an answer, then the OP still may very well get the benefit they sought: the OP learns from my answer. If Quorans take this individual ethic to heart en masse, then perhaps a benefit will arise that reduces the tendency of people to ask questions in order to cheat on homework, but increase their tendency to ask questions earlier, from the material they are studying, mainly for the purpose of learning it before working on an assignment for a grade. If that happens, Quora will have added to the improvement of the work ethic of students, even if ever so slightly.
I need help w AP Physics homework?
This is a three part question. I do not understand how to solve it. please help A Knight of the Round Table fires off a vat of burning pitch from his catapult at 12.2 m/s, at 34 ◦ above the horizontal. The acceleration of gravity is 9.8 m/s ^2 . How long is it in the air? Answer in units of s. What is the horizontal component of the velocity? Answer in units of m/s. How far from the catapult does it land? Answer in units of m.
Maths Percentage Homework Help Please?
Please could someone, anyone, help me with my maths? a) Mr Smiths bill for service is £185.65 including VAT (17.5%) How much is his bill before the VAT is added? b) In the town of Axton in 2002 there was 35600 houses, in 2003 there were 36200. Calculate the percentage increase. thankyou so much
I need some help with my math homework..?
The equation used is the time together (x) divided by the time alone for the first machine, plus the time together (x) divided by the time alone for the second machine, =1. so x/20 + x/15=1 Then solve for x by getting a common denominator 3x/60+ 4x/60=1 3x+4x=60 7x=60 x= 8 & 4/7 It takes 8 and 4/7 min for both machines to fill the vat To approximate, you know it will be less than 10 min, because two machines taking 20 min would take 10 min to fill it up. You also know it is more than 7.5 min, because that is the amount of time two machines filling it up at 15 min individually would take.
Help please for maths homework?
((Use your calculator)) Trainers-£45.50 plus 17.5% VAT 45.50 x 1.175 = cost Tennis Racquet £28.99 12.5% VAT 28.99 x 1.125 = Football boots £57.00 17.5% VAT 57.00 x 1.175
Physics Pressure/Fluid question!!!?
A 0.600 m-diameter vat of liquid is 2.80 m deep. The pressure at the bottom of the vat is 1.40 atm. What is the mass of the liquid in the vat? I only did: Gauge pressure = 1.40 – 1 = 0.4 atm Volume of cylinder = π*r²*h = π*((0.300)²)*h= (I have no idea what's the height(h) of it?) then I am stuck.... What is the mass of the liquid in the vat? THANK YOU!!
Two tungsten bulb of wattage 100 w and 60 with power work on 220 v potential difference. If they are connected in parallel, how much current will flow in the main conductor?
Homework question? It’s difficult to imagine why somebody would need to know the answer to this in a “real world” application - or rather, if they did, they’d know how to work it out without having to ask here…Anyway! The current in the main conductor will be the sum of the current drawn by each bulb individually.You may recall that ‘watts = volts times amps’. Yes? So to calculate the current in amps for each bulb divide the watts by the volts. Do that separately for each bulb, add them together and that’s your answer - job done!