Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE) Get help from our free tutors ===> Algebra.Com stats: 2012 tutors, 419458 problems solved View all solved problems on Quadratic_Equations -- maybe yours has been solved already! Become a registered tutor (FREE) to answer students' questions. If you need immediate math help from PAID TUTORS right now, click here. (paid link) Click here to see problems AND answers on one page Question 560574: x^2+17x+42=0 Click here to see answer by jim_thompson5910(28593)   Question 560575: x^2+8x-20=0 Click here to see answer by jim_thompson5910(28593)   Question 560583: Write a quadratic equation for the solutions x=9 and x=27 Write a quadratic equation for the solutions x=4 and x=16 Thank You Click here to see answer by jim_thompson5910(28593)   Question 560583: Write a quadratic equation for the solutions x=9 and x=27 Write a quadratic equation for the solutions x=4 and x=16 Thank You Click here to see answer by josmiceli(9671)   Question 560610: Write a quadratic function whose graph has the given characteristics: x-intercepts (-1,0),(7,0) and a point on the graph: (3,2). I tried making an equation using both intercepts. x=-1 x=7 x+1=0 x-7=0 (x+1)(x-7)=0 x^2-6x-7=0 So far I have this equation, but I don't know how to make it go through the point (3,2). If anyone could please help me, I would greatly appreciate it. Click here to see answer by scott8148(6628)   Question 560666: y^2=2/7y+4/7 Click here to see answer by unlockmath(1599)   Question 560838: Create a quadratic equation with these two solutions: x=4 and x=6 Click here to see answer by jim_thompson5910(28593)   Question 560972: y = x2 – 4x Use the values of x provided in the table to find the y values Click here to see answer by mananth(12270)   Question 560674: Hopefully someone can point out where i am going wrong: -- I let U = x^3 -- -- -- -- = +/- -- U = 1, 8 --- Sub x^3 back for U --- x=1 --- x=2 --- Problem is the book shows the answer to be: +/- Click here to see answer by richard1234(5390)   Question 560651: Why do you think it is important to know how to do the different methods for solving quadratic equations? Thank You Click here to see answer by richard1234(5390)   Question 561072: x^2+12x+4=0 Solve for X Click here to see answer by jim_thompson5910(28593)   Question 561177: What is the minimum value of f(x)=2x^2+5x-1 Click here to see answer by nerdybill(6958)   Question 561415: Factor : x2+21x+54 Click here to see answer by jim_thompson5910(28593)   Question 561564: what type and how many solutions will a quadratic equation have when the discriminant is a perfect square? A non-perfect square? Click here to see answer by richard1234(5390)   Question 561604: x^2-2x-13=0 I loved algebra, but it's been 30 years since I last used it. Click here to see answer by jim_thompson5910(28593)   Question 561548: I am trying to solve the equation 20/(x+1)-30/(x+6)=4 I have worked this down to 2(2x^2+19x-33) I do not know how to factor this though. I have several problems like this to do and am having trouble with them. Click here to see answer by ankor@dixie-net.com(15649)   Question 562001: Find the slope of the line containing the given points. ( square root of 2,-4) and (0.56,-4) Click here to see answer by josmiceli(9671)   Question 562000: can you help me solve this quadratic equation by factoring step by step? 2x^2=15-x Click here to see answer by scott8148(6628)   Question 562125: is 4x(3+x) quadratic? Click here to see answer by KMST(1868)   Question 562173: the solutions are x=-5, x=0 what is the quadratic equation? Click here to see answer by mananth(12270)   Question 562581: Twelve is the product of x and negative 4. Click here to see answer by solver91311(16877)   Question 562955: 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. The solutions are -5,1 Thank You Click here to see answer by mananth(12270)   Question 562960: Give exact and approximate solutions to three decimal places. y^2-2y+1=81 a. The solutions are y= -8,10 b. There are no approximate solutions since the solutions are integers. Since the solutions I got are integers, I'm confused as to whether my answer is right. Thank You Click here to see answer by mananth(12270)   Question 563142: Please help me solv the eguation Click here to see answer by richard1234(5390)   Question 563249: I am doing factoring using the gcf and I am stuck on a problem or equation. this is the equatuion 18m4+27m6. If you could answer me real soon it will be muchly appreciated. I have a test tomorrow and would like to have the answer as soon as possible Thanks Click here to see answer by stanbon(57307)   Question 563566: Solve for x: Click here to see answer by mananth(12270)   Question 563721: Give exact and approximate solutions to three decimal places. y^2-2y+1=81 a. The solutions are y= -8,10 b. There are no approximate solutions since the solutions are integers. Since the solutions I got are integers, I'm confused as to whether my answer is right. If my answer is right could someone tell me how I get it to three decimal places. Thank You Click here to see answer by solver91311(16877)   Question 563743: 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 The solutions are -5 and 1 I'm lost and could use some help. Thank You Click here to see answer by stanbon(57307)   Question 563746: f(x)+3x^2-18x+2 I need to graph this but don't know how Help! I'm lost Click here to see answer by nyc_function(2733)   Question 563746: f(x)+3x^2-18x+2 I need to graph this but don't know how Help! I'm lost Click here to see answer by lwsshak3(6494)   Question 563723: a^2+k^2=j^2 Solve for a When I do this problem I get two solutions. The answer only gives a choice of one. Could someone please help me. I'm confused. Thank You Click here to see answer by Tatiana_Stebko(1326)   Question 563771: Solve the equation for the variable x. The constrants a and b represent positive real numbers: Click here to see answer by lwsshak3(6494)   Question 563800: (Solve)Air Travel: A turbo-jet flies 50mph faster than a super-prop plane. If a turbo-jet goes 2000mi in 3hr less time than it takes the super-prop to go 2800mi, find the speed of each plane. Click here to see answer by mananth(12270)   Question 563740: f(x)=25x^2+10x+1 type an ordered pair I got 1 for y I got -1/5 for x The answer isn't an ordered pair though. Could someone please help me out. Thank You Click here to see answer by KMST(1868)   Question 563740: f(x)=25x^2+10x+1 type an ordered pair I got 1 for y I got -1/5 for x The answer isn't an ordered pair though. Could someone please help me out. Thank You Click here to see answer by Earlsdon(6287)   Question 563842: Change the equation to quadratic form and solve it by the most efficient method. 45/b - 16 = - 16/b+1 Click here to see answer by stanbon(57307)   Question 563890: Average mass of a group of people is 45.2kg. A newcomer to the group weighs 51kg, which increases the average by 0.2kg How many people are now in the group? This is a question which needs a quadratic equation to be set up in the form ax²+bx+c=0 so that it can be solved using the quadratic formula. I just can't figure out how to set it up. Please help me! :-) Click here to see answer by mananth(12270)   Question 563930: I have a bit of a problem with this word problem: A ball is hit by a bat when 3 ft off the ground. It is caught at the same height 300 feet from the batter. How far from the batter did it reach its maximum height? I was thinking 150 feet from batter, but that seems too simple. Any help? Click here to see answer by scott8148(6628)   Question 564056: ok so here is the fourth question. 45>m>35 and there should be a straight line under the second arrow pointing to the 35 thank you Click here to see answer by richard1234(5390)   Question 564060: I guess there were five questions i needed help with... a small dinner roll has 10 fewer calories than twice the number of calories in a slice of white bread. Together they contain at least 185 calories. Find the smallest possible number of calories in the slice of white bread. thats it thanks in advance again have a great day) Click here to see answer by stanbon(57307)   Question 564062: ok here goes the fourth question... 45>m>35 there is also a straight line under the second arrow that points to the 35 I tried to send this before but it didnt show up so i hope it didnt go through twice. sorry if it did thanks again Click here to see answer by richard1234(5390)   Question 564109: if (p+3) and (q-4) are the roots of the equation x^2=8x-15. What is the values of p and q? Click here to see answer by KMST(1868)   Question 564052: I am not sure what topic this question would fall under since i didn't find word problems under the algebra stuff. sorry. anyways i have been working on 4 questions for the last 2 months and i just cannot figure it out so maybe you can help. a company has four large buses and five small ones. Each large bus has 12 seats more than a small bus. The total seating capacity of all buses is 336. how many seats are on a large bus? Thanks in advance) Click here to see answer by KMST(1868)   Question 564173: Hi, I am having a problem forming the equation from a worded problem. I am struggling to understand what the terms mean in this equation and how they worked them out. I understand how to solve and can write quadratic motion equations. I have a good understanding. The problem is: A school concert usually attracts 600 people at a cost of $10 per person. On avaerage for every $1 rise in admission price, 50 less people attend the concert. If T is the total amount of takings and n is the number of $1 increases write a rule for the function which gives T in terms of n. The answer is: T = 6000 + 100n -50n^2 My thinking is that the 6000 represents the miinmum of the independant variable 600 people at $10 each which totals $6000. So this is where the parabola will start from the y-axis (i.e at zero). But how did they get the 100n? What does this mean in the context of the problem and why n^2? Why isn't it linear? Like T = 6000 - 50(n) Your help would be appreciated. Click here to see answer by ankor@dixie-net.com(15649)   Question 564173: Hi, I am having a problem forming the equation from a worded problem. I am struggling to understand what the terms mean in this equation and how they worked them out. I understand how to solve and can write quadratic motion equations. I have a good understanding. The problem is: A school concert usually attracts 600 people at a cost of $10 per person. On avaerage for every $1 rise in admission price, 50 less people attend the concert. If T is the total amount of takings and n is the number of $1 increases write a rule for the function which gives T in terms of n. The answer is: T = 6000 + 100n -50n^2 My thinking is that the 6000 represents the miinmum of the independant variable 600 people at $10 each which totals $6000. So this is where the parabola will start from the y-axis (i.e at zero). But how did they get the 100n? What does this mean in the context of the problem and why n^2? Why isn't it linear? Like T = 6000 - 50(n) Your help would be appreciated. Click here to see answer by bucky(2189)

---

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 17551..17595, 17596..17640, 17641..17685, 17686..17730, 17731..17775, 17776..17820, 17821..17865, 17866..17910, 17911..17955, 17956..18000, 18001..18045, 18046..18090, 18091..18135, 18136..18180, 18181..18225, 18226..18270, 18271..18315, 18316..18360, 18361..18405, 18406..18450, 18451..18495, 18496..18540, 18541..18585, 18586..18630, 18631..18675, 18676..18720, 18721..18765, 18766..18810, 18811..18855, 18856..18900, 18901..18945, 18946..18990, 18991..19035, 19036..19080, 19081..19125, 19126..19170, 19171..19215, 19216..19260, 19261..19305, 19306..19350, 19351..19395, 19396..19440, 19441..19485, 19486..19530, 19531..19575, 19576..19620, 19621..19665, 19666..19710, 19711..19755, 19756..19800, 19801..19845, 19846..19890, 19891..19935, 19936..19980, 19981..20025, 20026..20070, 20071..20115, 20116..20160, 20161..20205, 20206..20250