Algebra ->  Algebra  -> Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> Questions on Algebra: Quadratic Equation answered by real tutors!      Log On

 Ad: You enter your algebra equation or inequality - Algebrator solves it step-by-step while providing clear explanations. Free on-line demo . Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help! Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

 Question 275259: Can someone explain how to find the zeroes of the following problem? f(x) = 2x^2-x+4 Click here to see answer by jim_thompson5910(28545)

 Question 275284: write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form ax^2+bx+c=0. Solution: 10, only one solution Click here to see answer by user_dude2008(1861)

 Question 275286: Chuck throws a rock with an initial upward velocity of 12m/sec. How high is it after 0.7 seconds? Click here to see answer by nerdybill(6958)
 Question 275286: Chuck throws a rock with an initial upward velocity of 12m/sec. How high is it after 0.7 seconds? Click here to see answer by Greenfinch(383)

 Question 275254: Can someone help me with the following problemwith finding zeroes? f(x)=x^2-5x+1 Click here to see answer by Greenfinch(383)

 Question 275394: An oil spill of 4186 cubic centimeters is spilled onto a pond and spreads out in a circular shape having a diameter of 298 centimeters. Approximate the thickness of the oil film to four decimal places. (How do I start this problem, Im having trouble figuring that out) Thanks Click here to see answer by scott8148(6628)

 Question 275411: In a chemistry class, 6 liters of 4% silver iodide solution must be mixed with 10% solution to get a 6% solution. How many liters of 10% solution are needed? Click here to see answer by mananth(12270)

 Question 275417: A rock falls from a tower that is 304 feet high. As it is falling, its height is given by the formula h=304-16t^2. How many seconds(in tenths) will it take for the rock to hit the ground (h=0)? (I believe you just set H=0 and then solve? Is that correct?) Click here to see answer by stanbon(57290)
 Question 275417: A rock falls from a tower that is 304 feet high. As it is falling, its height is given by the formula h=304-16t^2. How many seconds(in tenths) will it take for the rock to hit the ground (h=0)? (I believe you just set H=0 and then solve? Is that correct?) Click here to see answer by mananth(12270)
 Question 275417: A rock falls from a tower that is 304 feet high. As it is falling, its height is given by the formula h=304-16t^2. How many seconds(in tenths) will it take for the rock to hit the ground (h=0)? (I believe you just set H=0 and then solve? Is that correct?) Click here to see answer by Alan3354(30993)

 Question 275335: the house plans are 60 x 70 you decrease both length and width by the same amount, the area is 3696. so how much are the both decreased by? i need to know how to solve it. Click here to see answer by ankor@dixie-net.com(15646)

 Question 275431: Throwing a wrench. An angry construction worker throws his wrench downward from a height of 128 feet with an initial velocity of 32 feet per second. The height of the wrench above the ground after t seconds is given by S(t)= -16t^2  32t + 128. a) What is the height of the wrench after 1 second? b) How long does it take for the wrench to reach the ground? Click here to see answer by jsmallt9(3296)

 Question 275778: x^2+6x+27 help me can you solve it for me Click here to see answer by nyc_function(2733)
 Question 275778: x^2+6x+27 help me can you solve it for me Click here to see answer by solver91311(16877)

 Question 275800: Change to a percent: a. 0.076 b. 1 3/4 Click here to see answer by josmiceli(9668)

 Question 275891: The following function gives the height, (h) meters, of a batted baseball as a function of the time, t seconds, since the ball was hit. h=-6(t-2.5)^2+38.5 How many seconds after it was hit did the ball hit the ground, to the nearest second? ------------------------------------ I have made an equation of 0=-6(t-2.5)^2+38.5 and then simplified it out to 0=-6t^2+30t+1 but don't know how to solve for t. i have looked at step by step calculators on a bunch of different sites but all of the instructions involved things that i have not learned yet. The answer in the back of the book is 5 and that's what all of the calculators say but i don't know how to get that answer. I just wanted to know if there is an easier way to solve this equation than the calculators give me. Thanks. Click here to see answer by scott8148(6628)

 Question 276032: Tickets=-0.2x^2+12x+11 Does the graph of this equation open up or down? How do you know? Click here to see answer by richwmiller(9135)

 Question 276030: how many solutions are there to this equation -0.2x^2+12x+11=0 and how do you know? Click here to see answer by richwmiller(9135)

 Question 275837: f(x)4x2 + 4x - 3 I need help to find the intercepts, the vertex and the maximun or minimun. I know I need to use the quadratic formula, but I don't know how to apply it to find these three points. Thank you for your help. Martha Click here to see answer by ankor@dixie-net.com(15646)

 Question 276067: What is the greatest common factor of the terms 48s^5t^3u^2 and 40s^3tu^4? Click here to see answer by stanbon(57290)

 Question 276243: A boat weighs 1500 lb more than its motor and 1900 lb more than its trailer. Together the boat and motor weigh five times as much as the trailer. The answer is 2666 &2/3 lb, HOW?!?! Click here to see answer by solver91311(16877)

 Question 276593: I find this quite difficult, though I am gaining some level of understanding. I am unsure how to solve for the following 2 quadratic equations Please help Thanks 1. x2 – 2x – 13 = 0 2. 2x2 – 3x – 5 =0 These are the steps I need to take, just unsure how a. move the constant term to the right side of the equation b. multiply each term in the equation by four times the cofficient of the x2 term c. square the coefficient of the original x term and add it to both sides of the equation d. take the square root of both sides e. set the left side of the equation equal to the positive square root of the number on the right side and solve for x f. set the left side of the equation equal to the negative square root of the number on the right side of the equation and solve for x Click here to see answer by richwmiller(9135)
 Question 276593: I find this quite difficult, though I am gaining some level of understanding. I am unsure how to solve for the following 2 quadratic equations Please help Thanks 1. x2 – 2x – 13 = 0 2. 2x2 – 3x – 5 =0 These are the steps I need to take, just unsure how a. move the constant term to the right side of the equation b. multiply each term in the equation by four times the cofficient of the x2 term c. square the coefficient of the original x term and add it to both sides of the equation d. take the square root of both sides e. set the left side of the equation equal to the positive square root of the number on the right side and solve for x f. set the left side of the equation equal to the negative square root of the number on the right side of the equation and solve for x Click here to see answer by solver91311(16877)

 Question 276484: If the graph of y=2x^2-kx+3 touches the x-axis then what are the possible values of k? Please keep answer in surd form. Thanks in advance. Click here to see answer by user_dude2008(1861)

 Question 276613: Find the equation of the line with the indicated slope and y intercept. write the final answer in the standard form Ax+By=C Click here to see answer by user_dude2008(1861)

 Question 276918: Help. I'm totally perplexed by the question: An angry construction worker throws his wrench downward from a height of 128 feet with an initial velocity of 32 feet per second. The height of the wrench above the ground after 6 seconds is given by S(t) = -16t^2 -32t +128. What is the height after 1 second? How long does it take for the wrench to reach the ground? Click here to see answer by stanbon(57290)
 Question 276918: Help. I'm totally perplexed by the question: An angry construction worker throws his wrench downward from a height of 128 feet with an initial velocity of 32 feet per second. The height of the wrench above the ground after 6 seconds is given by S(t) = -16t^2 -32t +128. What is the height after 1 second? How long does it take for the wrench to reach the ground? Click here to see answer by Earlsdon(6287)

 Question 276999: Put the equation 5x^2-10x-2 in turning point form a(x-h)^2+k, by completing the square. Click here to see answer by jim_thompson5910(28545)

 Question 277006: What is 6x^2-8xy-8y^2 equal to? My book states the answer to be (3x+2y)(2x-4y), how do I get to this answer? Click here to see answer by jim_thompson5910(28545)

 Question 277032: trying to solve a velocity equation where s=4.9t^2+Vot Velocity = Vo = 20m/s Height = s = 158.4m time = t = which is what we are solving for so... I got as far as 4.9t^2 + 20t - 158.4=0 Click here to see answer by jim_thompson5910(28545)