# Questions on Algebra: Quadratic Equation answered by real tutors!

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 Quadratics: solvers Practice! Answers archive Lessons Word Problems In Depth

 Question 103590: Solve. (x + 2)^2 = 7 Click here to see answer by Fombitz(13828)

 Question 103593: Identify the axis of symmetry, create a suitable table of values, then sketch the graph (including the axis of symmetry). y = x^2 + 3x  3 Click here to see answer by MathLover1(6625)

 Question 103585: Solve. (x + 4)^2 = 16 Click here to see answer by Fombitz(13828)

 Question 103618: x^2-4x+2 = 0 5x^2 - 2 = 2x 3x^2 - 6x = 2 Click here to see answer by MathLover1(6625)

 Question 103617: Solve by completeing square x^2=4-7x 3x^2-x-x-2=0 If the square of 2 less than an interger is 16, find the number(s)? Click here to see answer by MathLover1(6625)

 Question 103591: The height h in feet of an object after t seconds is given by the function h = 16t^2 + 40t + 10. How long will it take the object to hit the ground? Round your answer to the nearest thousandth Click here to see answer by jim_thompson5910(28536)

 Question 103616: Solve equations for x (x-3)^2=10 (x+2)^2 = 16 Click here to see answer by MathLover1(6625)

 Question 103646: I am having a hard time with this one can someone please help me? Its a multiple choice question but I am having a hard time. Solve by using the quadratic formula. 3x^2 = 11x + 4 A) -1/3,4 B) 1/3,-4 C) -1/4,3 D) 1/4,-4 Click here to see answer by stanbon(57282)

 Question 103662: Find the constant term that should be added to make the following expression a perfect-square trinomial. x^2 + 2x Click here to see answer by Fombitz(13828)

 Question 103666: Solve. x^2  10x + 16 = 0 Click here to see answer by Fombitz(13828)

 Question 103667: The demand and supply equations for a certain item are given by D = 5p + 40 S = p^2 + 30p  8 Find the equilibrium price Click here to see answer by stanbon(57282)

 Question 103742: My problem is to find the number c such that the vertex of f(x)=x^2+8x+c lies on the x-axis. Click here to see answer by stanbon(57282)

 Question 103586: Please help me solve. The length of a rectangle is 1 cm more than 2 times its width. If the area of the rectangle is 76 cm^2, find the dimensions of the rectangle to the nearest thousandth. Click here to see answer by scott8148(6628)

 Question 103749: My problem is if the vertex of f(x)=x^2+bx+c is at (2,4), find b and c. Click here to see answer by scott8148(6628)
 Question 103749: My problem is if the vertex of f(x)=x^2+bx+c is at (2,4), find b and c. Click here to see answer by edjones(7569)

 Question 103792: My question is if the vertex of f(x)=-x^2+bx+8 has y-coordinate 17 and is in the second quadrant, find b. Click here to see answer by jim_thompson5910(28536)
 Question 103792: My question is if the vertex of f(x)=-x^2+bx+8 has y-coordinate 17 and is in the second quadrant, find b. Click here to see answer by edjones(7569)

 Question 103833: square root 7x+29=x+3 Click here to see answer by jim_thompson5910(28536)

 Question 103813: Let me try this again as I did not recieve the normal confirmation page that this was sent to the wonderful tutors here. Directions from my Professor are as follows: Make sure that your work is demonstrating the solving method given in the instructions. Use the Insert and Symbols menus in Word to present the radical √ and plus/minus ą symbols. Remember that radicands must be enclosed within [ ]. Typing your work vertically is preferred but optional. If you choose to type horizontally, make sure you are appropriately using grouping symbols. On Pg: 583 of our textbook it shows the quadratic formula. But I somehow am messing up to the point I am so confused I don't know where to begin. Here is the Problem: Solve by using the Quadratic Formula; x^2 - 3x = 7x - 2 Thank You! Click here to see answer by jim_thompson5910(28536)

 Question 103658: Solve by completing the square. 2x^2  6x  3 = 0 Click here to see answer by ankor@dixie-net.com(15645)
 Question 103658: Solve by completing the square. 2x^2  6x  3 = 0 Click here to see answer by jim_thompson5910(28536)

 Question 103806: My question is given the equation s=-16t^2+initial velocity x t+initial height, a rocket is fired upward from ground level with an initial velocity of 1600 feet/sec. When does the rocket reach its maximum height and how high is it at that time? Click here to see answer by stanbon(57282)

 Question 103931: Can someone Please, Please, Please help me solve tis problem by using the Quadratic Formula! I am desperite! Thank You! Solve by Using the Quadratic Formula: x^2 - 7x - 1= -7 Click here to see answer by jim_thompson5910(28536)
 Question 103931: Can someone Please, Please, Please help me solve tis problem by using the Quadratic Formula! I am desperite! Thank You! Solve by Using the Quadratic Formula: x^2 - 7x - 1= -7 Click here to see answer by JP(22)

 Question 103947: Tutor, I was wondering if you could help me with this problem? Find the equation and identify the axis of symmetry, create a suitable table for values, and graph. y = x^2 - 5x + 3 I am not sure how to solve this problem I think I am making a mistake somewhere along the line. If you could help I would appreciate it. Thanks. Click here to see answer by stanbon(57282)

 Question 103942: what values for x must be excluded in the following fraction 7 over x-9 a. 0 b. -9 c. 9 d. none Click here to see answer by doukungfoo(195)
 Question 103942: what values for x must be excluded in the following fraction 7 over x-9 a. 0 b. -9 c. 9 d. none Click here to see answer by jim_thompson5910(28536)

 Question 104025: I am stuck on this word problem would you be able to help me work it out? A ball is thrown upward from the roof of a building 100 m tall with an initial velocity of 20 m/s. When will the ball reach a height of 80 m? This problem has me confused I am not sure where to begin. Thanks for your help. Click here to see answer by ankor@dixie-net.com(15645)

 Question 104059: Is the following trinomial a perfect square? x^2 + 18x + 81 Click here to see answer by scott8148(6628)

 Question 104058: Find the x-intercepts. y = x^2 + 5x + 2 Click here to see answer by HyperBrain(694)

 Question 104057: Solve by completing the square. x^2 = 5x + 2 Click here to see answer by HyperBrain(694)

 Question 104056: Solve. x^2 + 7x  1 = 0 Click here to see answer by HyperBrain(694)

 Question 104063: Q.Solve for x (b-c)x^2 + (c-a)x + (a-b)= 0 Click here to see answer by stanbon(57282)
 Question 104063: Q.Solve for x (b-c)x^2 + (c-a)x + (a-b)= 0 Click here to see answer by HyperBrain(694)

 Question 104023: Tutor, I have one last problem and I am having difficulty getting the answer. I think I am wrong on the negatives and possitives. My graph does not look right. Indetify the axis of symmetry and create a table of values and graph. y= -x^2 + 6x - 2 My answer does not look right to me could you please help me with this? Thank you in advance. Click here to see answer by stanbon(57282)

 Question 104066: A=1/2h for h Click here to see answer by stanbon(57282)

 Question 104070: Find the axis of symmetry. y = x^2 + 5x  7 Click here to see answer by stanbon(57282)

 Question 104074: Solve by completing the square. x^2 + 2x  8 = 0 Click here to see answer by jim_thompson5910(28536)

 Question 104072: Solve 5(x  2)^2 = 3 Click here to see answer by jim_thompson5910(28536)

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