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 Question 695678: find b if you happen to know the maximum y-value of the function y= -4x^2 + bx -1 is 21. Click here to see answer by stanbon(60771)

 Question 695868: solve over the set of complex numbers (x+5)^2=-36 (given) if I work it out I get x^2-10x+61=0 but now what, it won't foil, x^2-10x+25=-36 x^2-10x+25= -61+25 completing the square gets me right back where I started... Click here to see answer by KMST(2478)

 Question 695911: Find the product of the solutions of this equation. 3x^2 - 12x + 7 = 0 Click here to see answer by ReadingBoosters(3246)

 Question 696225: State the possible number of imaginary zeros of f(x) = 10x^3 - 4x^2 + 2x - 6. Click here to see answer by solver91311(18785)

 Question 696261: A jewellery store owner studied his past records and found that on the average if he sells x articles of in one week then his weekly profit, P(x)= \$ can be calculated using the equation p(x) = 100x - 5x^2/3. What is his maximum weekly profit? Can you please help me? Thanks so much in advance. Click here to see answer by solver91311(18785)

 Question 696339: find positive square root of equation 4x^2+ 7x = 15 complete square Solving a Quadratic Equation by Completing the Square Click here to see answer by stanbon(60771)
 Question 696339: find positive square root of equation 4x^2+ 7x = 15 complete square Solving a Quadratic Equation by Completing the Square Click here to see answer by josmiceli(10616)
 Question 696339: find positive square root of equation 4x^2+ 7x = 15 complete square Solving a Quadratic Equation by Completing the Square Click here to see answer by Alan3354(34677)

 Question 696422: Harry fires a rocket upward, which travels according to the equation, h(t)=-16t^2+725t where h(t) is the height of the rocket in feet t seconds after it's fired. What is the height of the rocket after 5 seconds? Click here to see answer by Alan3354(34677)

 Question 696420: A man jumps off a diving board into a pool. The equation h(t)=16T^2 + 40 gives the height,in feet, the man is above the pool t seconds after he jumps. a) how high above the pool is the diver after the first second? b) how high is the diving board? Click here to see answer by Alan3354(34677)

 Question 696524: in a quadratic equation x^2 + px + q =0 if sum of its roots are equal to thrice of their difference then proove that 2p^2 = 9q Click here to see answer by stanbon(60771)
 Question 696524: in a quadratic equation x^2 + px + q =0 if sum of its roots are equal to thrice of their difference then proove that 2p^2 = 9q Click here to see answer by Edwin McCravy(9717)

 Question 696522: in a quadratic equation lx^2+nx+n=0 if ratio of roots is p:q then proof (p/q)^(1/2) + (q/p)^(1/2) + (n/l)^(1/2) =0 Click here to see answer by Edwin McCravy(9717)

 Question 696548: what is the value of m in the eq so that the sum of the squares of the roots of the eq are minimum..... Click here to see answer by darknez25(6)

 Question 696680: Please I need help solving the following problem. Suppose you hit a ball and the path of it's path follows the graph f(x)= -16x^2 +20x +3. How many seconds will it take for the ball to hit the ground? Round the answer to nearest second. A method I was using to find the roots of the equation was to multiply ac, -16(3) = -48, so that way I try finding the factors of -48 that sum up to 20 so these factors can be used in the bionomials that create a product of the equation above--but it was here where I got confused. If there's another method to solve the roots of f(x)= -16x^2 +20x +3, that would be really helpful. Click here to see answer by Alan3354(34677)

 Question 27: It has been years since I have had an algebra class. I cannot remember how to solve this problem. Thank You! Click here to see answer by jam123(18)

 Question 696741: The weight of a human fetus is given by the formula W=3(t^2), where W is weight in grams and t is the time in weeks, 0 <= t <= 39. after how many weeks does the fetus weigh 300 grams? Click here to see answer by nerdybill(7090)

 Question 696766: One root of the equation x2+px+q=0 is the cube of the reciprocal of the other. Show that q4+q(2q-p2)+1=0 Click here to see answer by MathGeek87(9)

 Question 696853: Find values of a and k for which each parabola contains the given points y-k = a(x+3)^2 ; (-5,1) (1,7) Click here to see answer by lwsshak3(7679)

 Question 696948: transform the length of a pavement exceeds four times its breadth by 3meter to algebraic equation Click here to see answer by josmiceli(10616)

 Question 697039: Solve each equation by factoring. 1. 4x2 – 17x – 15 = 0 2. 10x2 + 19x + 6 = 0 3. Solve 3x2 = 4,800 by using square roots. Click here to see answer by Alan3354(34677)

 Question 697057: 10. a) Write a quadratic equation in the form ax 2  bx  c  0 with roots of 6 and 7. b) What would happen to the roots if you multiplied both sides of the equation in part a) by 3? Explain. Click here to see answer by lwsshak3(7679)
 Question 697057: 10. a) Write a quadratic equation in the form ax 2  bx  c  0 with roots of 6 and 7. b) What would happen to the roots if you multiplied both sides of the equation in part a) by 3? Explain. Click here to see answer by MathLover1(7480)

 Question 697093: Trying to solve Y=-2X^2+BX+5 Assume max value of X=2 Find B I'm having problem expressing the problem in the Y=A(X-H)^2+K form. The first step of getting it to Y=-2(X-2)^2+K is where I'm having trouble. I can solve the problem once it is expressed in the form. I just don't know how to change one form to the other. I'm trying to brush up so I can help my daughter on her SAT practice tests. Thank you very much for any assistance you might provide. Click here to see answer by nerdybill(7090)

 Question 697060: 19. The length of a rectangular plot of land is 7 m greater than its width. The diagonal is 8 m greater than the width of the plot of land. What are the dimensions of the plot of land? Click here to see answer by htmentor(855)

 Question 697059: 14. The hypotenuse of a right triangle measures 29 cm. One leg is 1 cm shorter than the other. What are the lengths of the legs? Click here to see answer by RedemptiveMath(80)

 Question 697148: solve by completing the square: My work: then do half of four which is 2, then do 2times 2 and get 4. (x-2)(x-2)=-6 (x-2)=plus or mine x=2 plus or minus Click here to see answer by Alan3354(34677)