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 Question 374567: write a quadratic equation in the variable x having the given numbers as solutions. SOLUTION: 2, ONLY SOLUTION Click here to see answer by robertb(4012)

 Question 374641: A rectangle is 9ft longer than its wide, and its area is 360ft2. use quadratic equation to find its length and width Click here to see answer by mananth(12270)

 Question 374913: Is this the solution to this problem: 2.Discriminant is zero. There is only one solution. x = -b/2a Click here to see answer by ewatrrr(10682)

 Question 374923: Solve the equation x^2-4x=-10 and express the roots in terms of i. Click here to see answer by Fombitz(13828)

 Question 374974: Evening Everyone. Been a while since i attempeted anything like this and trying to brush up a little, i have attempted to anser the first two parts if somebody would be so kind as to check them and assist on the third part Use the chain rule to find the derivatives of the following functions: (a) y = e^-x2 I Got = -2e^(-x^2) (b) y = cos(3x^2 + 2x) I Got = (-Sin).(3x^2+2x).(6x+2) (c) y = sin^2(3x^2 - 1) Thank You in antiscipation Click here to see answer by Fombitz(13828)
 Question 374974: Evening Everyone. Been a while since i attempeted anything like this and trying to brush up a little, i have attempted to anser the first two parts if somebody would be so kind as to check them and assist on the third part Use the chain rule to find the derivatives of the following functions: (a) y = e^-x2 I Got = -2e^(-x^2) (b) y = cos(3x^2 + 2x) I Got = (-Sin).(3x^2+2x).(6x+2) (c) y = sin^2(3x^2 - 1) Thank You in antiscipation Click here to see answer by solver91311(16870)

 Question 375002: Would really appreciate help with the following question on my task sheet. Find dy=dx as a function of x and y when: (a) y - x sin y - 3x^2 - 1 = 0 and (ii) x^2y^3 - x^2 + 3y - 3 = 0 Finally (c) (1 - x^2) tan^-1 y = 3 Need to brush up on these, have looked in engineering mathmatics book, having difficulty, and the instructor isnt really approachable Thanks Click here to see answer by Fombitz(13828)

 Question 375008: HiPlease can somebody help with this problem i) The variables x and y are given in terms of the parameter t as x = 3t(1 + t^3) and y = 3t^2(1 + t^3). Provethat dy/dx = t(2 + 5t^3)/1 + 4t^3 ii) A cycloid is a curve traced out by a point on the rim of a wheel as it rolls along the ground. Its curve maybe given parametrically by x = a(t - sin t) and y = a(1 - cos t), where a is a constant. Show thatdy/dx = cot(t/2) Thanks Click here to see answer by Fombitz(13828)

 Question 375016: I don't know how to convert this equation into standard form (i'm completely lost): 150=w[(120-w)/2] thank you Click here to see answer by solver91311(16870)

 Question 375035: What 2 numbers have a product of 128 and a sum of 48? I don't believe it has a solution with whole numbers anyway. Click here to see answer by jim_thompson5910(28504)

 Question 375015: Hi Totally Bewildered, Please Help? The path of a point is given parametrically by x = a cos t, y = b sin t. Show that the point travels around the ellipse x^2/a^2 +y^2/b^2 = 1 Express dy=dx in terms of t. Suppose that t represents time. Express the speed as a function of t. ii) A closed hollow vessel is in the form of a right-circular cone, together with its base, and is made of sheet metal of negligible thickness. Express the total surface area S in terms of the volume V and the semi-vertical angle 'theta' of the cone. Show that for a given volume, the total area of the surface is a minimum if sin 'theta' = 1/3 . With this value of 'theta', find the value of S if V = 8/3'pie' a^3 where a is a constant. Sorry didnt know how to get symbols on this, so typed the names Kind Regards John Click here to see answer by solver91311(16870)

 Question 375065: Hello everyone, finding the following question puzzling, i have not covered this before, and am trying to get a heads up for when i start my course Use logarithmic differentiation to differentiate the following: (i) y = 2^x (ii) y = x^x Cheers Click here to see answer by jim_thompson5910(28504)
 Question 375065: Hello everyone, finding the following question puzzling, i have not covered this before, and am trying to get a heads up for when i start my course Use logarithmic differentiation to differentiate the following: (i) y = 2^x (ii) y = x^x Cheers Click here to see answer by solver91311(16870)

 Question 375143: Solve the system of equations by graphing. Then clasify the system. 6u=v= 32 6u=v=40 Click here to see answer by robertb(4012)
 Question 375143: Solve the system of equations by graphing. Then clasify the system. 6u=v= 32 6u=v=40 Click here to see answer by Alan3354(30983)

 Question 375139: Solve the system of equations by graphing. Then classify the system. 6x-y=21 6x=7y=-3 Click here to see answer by Fombitz(13828)

 Question 375243: how do solve: h(t) = -16t^2 + 90t + 15 Click here to see answer by nerdybill(6951)

 Question 375397: a student is asked to solve b^2+x^2=a^2 and gives the solution:x=a-b. What did they do wrong and how do you correctly solve this???? Click here to see answer by edjones(7569)

 Question 375464: solve the equation 5. x2 – 3x + 2 = 0 Click here to see answer by ewatrrr(10682)

 Question 375463: 4. x2 + 144 = 0 (1 point) a. 12 b. ±12i c. –12 d. ±12 Click here to see answer by ewatrrr(10682)

 Question 375478: Hello Everyone Having Trouble with this. Evaluate: dy=dx at x = 0 where (i) y = (x^2 - 1)/(x^2 + 2x + 1) (ii) y = (e^x + 1)/(1 + e^-x) Thank You Click here to see answer by Fombitz(13828)

 Question 375404: Greetings Everyone, A bit puzzelled with this poblem Evaluate dy=dx at x = 0 where (i) y = (x^2 - 1)/(x^2 + 2x + 1) (ii) y = (e^x + 1)/(1 + e^-x) Thanks in advance Click here to see answer by Fombitz(13828)

 Question 375527: 2. x2 – 2x – 11 = 0 Use the Quadratic Formula to solve each equation. Click here to see answer by jim_thompson5910(28504)
 Question 375527: 2. x2 – 2x – 11 = 0 Use the Quadratic Formula to solve each equation. Click here to see answer by ewatrrr(10682)

 Question 375858: Hi, Totally Stuck here, not sure if the lecturer has skiped over this part, Find dy=dx as a function of x and y when: (a) y - x sin y - 3x^2 - 1 = 0 (b) x^2y^3 - x^2 + 3y - 3 = 0 (c) (1 - x^2) tan^-1 y = 3 Thanks Click here to see answer by Fombitz(13828)

 Question 375885: Find a fourth degree polynomial function f(x) having only real coefficients,-1,4, and i as zeros, and f(2)=30 Click here to see answer by Fombitz(13828)

 Question 375879: 3x^2 + 9x, find x and y intercepts,range and vertex. Click here to see answer by Fombitz(13828)
 Question 375879: 3x^2 + 9x, find x and y intercepts,range and vertex. Click here to see answer by ewatrrr(10682)

 Question 375514: find and label the vertex and the line of symmetry f(x)=-2(x+2)=0 Click here to see answer by Fombitz(13828)