Algebra ->  Algebra  -> Quadratic Equations and Parabolas -> 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 324074: Solve by factoring: x^2 + 2x –15 =0 Click here to see answer by stanbon(57282)

 Question 324081: Can x (x – 5) = 0 be solved by dividing both sides of the equation by x? Explain your answer. Click here to see answer by Fombitz(13828)

 Question 324090: ok so i was wondering in a quadratic equasion if a term is mssing what you replace it with. for example 5x^2+5x=0 what do i putin the c term? and 3x^2+3=0. what do i put in the b term? this needs to be solved using the quadratic method, so do i replace each term with 1 or 0? Click here to see answer by Fombitz(13828)

 Question 324078: Solve by using the quadratic formula. Show complete solutions. 3x (3x + 4) = -4 Click here to see answer by Fombitz(13828)

 Question 324073: Solve by factoring: 4y^2 – 7y = 0 Click here to see answer by Fombitz(13828)

 Question 324085: The sum of the squares of two consecutive integers is 613. What are the integers? Let x be one integer. Therefore x +1 is the next integer. x^2+(x+1)^2=613 Click here to see answer by Fombitz(13828)

 Question 324080: Solve by using the quadratic formula. Show complete solutions. 2 = 0.7n + 0.6n^2 Click here to see answer by Fombitz(13828)

 Question 324138: A bridge uses a parabolic arch to support it as shown in the picture. The bridge is 100 m long and has a maximum height of 75m. Determine an algebraic expression, in standard form, that models the shape of the bridge. If you must drive 10 m on the bridge before you reach the arch, how high is the bridge above the water below ? Click here to see answer by galactus(183)

 Question 324208: I have been struggling with this problem: x(x+6)=0 I just don't understand the steps to get the answer. Can you show me step by step to solve this? This problem was in a chapter for factoring. The only directions for this problem was to solve. Click here to see answer by jim_thompson5910(28536)
 Question 324208: I have been struggling with this problem: x(x+6)=0 I just don't understand the steps to get the answer. Can you show me step by step to solve this? This problem was in a chapter for factoring. The only directions for this problem was to solve. Click here to see answer by Alan3354(30993)

 Question 324192: I don't understand what each number in a quadratic equation represents. For instance, in the equation , I can't figure out what the 2 will show up as on a graph, or the 8. Can you please give me a breakdown of a quadratic equation? Thank you -Meli Click here to see answer by checkley77(12569)

 Question 324194: I don't understand how to change a quadratic equation in factored form into one in expanded form, and the other way around, particularly when the equations get more complex. An explanation of how to do this would be much appreciated. Thank you -Meli Click here to see answer by rapaljer(4667)

 Question 324449: What is the square root of m squared + 30m + 225 Click here to see answer by solver91311(16872)

 Question 324504: I just don't get word problems! the two sides of a right triangle differ by one. If the hypotenuse is 29cm, then determine the lengths of the two sides. How do I solve using the quadratric formula. Click here to see answer by jim_thompson5910(28536)

 Question 324498: Help I'm lost! I need to solve using the quadratic formula. An airplane makes a 990km flight with a tailwind and returns, flying into the same wind. The total flying time is 3 hours 20 minutes, and the airplane's speed in still air is 600 km/h. What is the spped of the wind? Click here to see answer by scott8148(6628)

 Question 324573: I am trying to complete the square. Here's what I did: x(2x+3)-1=0 x=2x+3+1=0+1 x=2x+4=1 x= (2,-2) Click here to see answer by Fombitz(13828)
 Question 324573: I am trying to complete the square. Here's what I did: x(2x+3)-1=0 x=2x+3+1=0+1 x=2x+4=1 x= (2,-2) Click here to see answer by stanbon(57282)

 Question 324474: if the sides of a square are lengthened by 8 cm, the area becomes 196 cm2. Find the length of a side of the original square Click here to see answer by Fombitz(13828)

 Question 324583: Use the quadratic formula to determine the x-intercepts (if any) of the following function. Then evaluate the function for several values of x, and use the resulting points to graph the function. f(x) = -x^2 + 1 Click here to see answer by Fombitz(13828)

 Question 324633: Find the value(s) of k so that x^2 + 4(k-1)x + 4k^2 = 0 has no real roots Click here to see answer by Fombitz(13828)

 Question 324647: Solve using substitution: -y − 5x = -7 2y − 2x = 14 Solve using substitution: -8x = -4 − y 3y -24x = 8 Solve using elimination: 6x − 2y − 3= 0 4y − 4x = -6 Solve using elimination: 5x − 7y − 1= 0 -10y − 5x = -1 Solve using elimination: -4y + 2x − 8 = 0 -3x + 6y = 12 Solve using elimination: 8y = -2x − 16 -x − 4y - 8 = 0 Click here to see answer by Alan3354(30993)

 Question 324645: Solve using substitution: 4x − y − 4 = 0 7y = 29 + 9x Click here to see answer by Fombitz(13828)

 Question 324601: complete the square to write the function in the form f(x)=a(x-h)^2+k. f(x)=x^2+5x+6 Click here to see answer by Fombitz(13828)

 Question 324675: I am lost at how to solve this problem. Solve by applying the Quadratic Formula; all radicals should be simplified as far as possible. Show your work. x2 + 8x = 3 Click here to see answer by stanbon(57282)

 Question 324749: Write a quadratic equation having the given numbers as solutions. 6 - , 6 + Click here to see answer by Fombitz(13828)

 Question 324734: Glenn cuts half a rectangular lawn, 40m by 30m, by mowing strips of equal width around the perimeter. Brad cuts the small rectangular left. How wide a strip does Glenn cut so that they share the work equally? I need to solve using the quadratic formula. Click here to see answer by solver91311(16872)

 Question 324589: Glenn cuts half a rectangular lawn, 40m by 30m, by mowing strips of equal width around the perimeter. Brad cuts the small rectangular left. How wide a strip does Glenn cut so that they share the work equally? I need to solve using the quadratic formula. Thank You in advance. Click here to see answer by ankor@dixie-net.com(15645)

 Question 324725: 5x(x - 1) - 7 = 4x(x -2) Click here to see answer by rfer(12654)

 Question 324724: x^2 + 2/3x + ____ = (x + ____)^2 Click here to see answer by checkley77(12569)

 Question 324871: Bill & Jose's Discount Cinema sold adults' tickets for \$4.10 each and children's tickets for \$2.70 each. Last Tuesday, a total of \$331.30 was collected from 89 movie watchers. How many of each type of ticket were sold? (Let x represent the number of adults' tickets and y represent the number of children's tickets.) Click here to see answer by stanbon(57282)

 Question 324494: Find an application for your chosen field--- which is psychology or really anything-- or one of interest that involves solving a quadratic equation and post the problem and solution (not just answer but how to solve it). I am really stuck on this and any help would be GREATLY appreciated!!! Click here to see answer by ankor@dixie-net.com(15645)