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

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

 Question 624568: someone help me i need to figure out these answer can you guys show steps. Use the substitution method to solve the system y=x^2 y= 7x- 6 i need to find x1 x2 y1 and y2 Click here to see answer by ewatrrr(10682)

 Question 624575: I cant get the right answer for y i know x = 0 can someone help me find y Use the substitution method to solve the system -x + y= -1 4x-3y=3 ''. Click here to see answer by ewatrrr(10682)

 Question 624574: I am having a hard time doing this can someone help me Use the substitution method to find all solutions of the system y=x+1 xy=6 Click here to see answer by solver91311(16897)

 Question 624570: Does anyone know how to do this i need help. Use the substitution method to solve the system x^2+y^=20 x+y=1 Click here to see answer by oscargut(891)

 Question 624720: Can this polynomial be factored? 16a^2-56xy+49b^2 or 30x^3+25x^2+5y Click here to see answer by Edwin McCravy(8909)

 Question 624796: m2-5m=14 Click here to see answer by asuar010(324)

 Question 624832: In solving the equation (x + 1)(x  2) = 4, Eric stated that the solution would be x + 1 = 4 => x = 3 or (x  2) = 4 => x = 6 However, at least one of these solutions fails to work when substituted back into the original equation. Why is that? Please help Eric to understand better; solve the problem yourself, and explain your reasoning. Click here to see answer by shalon(2)

 Question 624828: x^(2/3)-3x^(1/3)-18=0 help solve x Click here to see answer by jsmallt9(3296)

 Question 624896: hi im so confused what happend if come across a problem like this (a+1)(a+2)=0 and a problem n^+3n-12=6 the ^ is 2 Click here to see answer by Edwin McCravy(8909)
 Question 624896: hi im so confused what happend if come across a problem like this (a+1)(a+2)=0 and a problem n^+3n-12=6 the ^ is 2 Click here to see answer by ewatrrr(10682)
 Question 624896: hi im so confused what happend if come across a problem like this (a+1)(a+2)=0 and a problem n^+3n-12=6 the ^ is 2 Click here to see answer by josmiceli(9697)

 Question 624921: Simplify 35000x^2-x/200x Click here to see answer by jim_thompson5910(28598)

 Question 623696: The area of a rectangular plot 24 feet long and 16 feet wide will be doubled by adding an equal distance to each side of the plot. What is the distance added to each side? Click here to see answer by MathTherapy(1425)

 Question 625103: (1/x-1)-(1/x+1)=(2/x^2-1) list the value of restriction on the variable and solve the equation Click here to see answer by oscargut(891)

 Question 625171: You are given the coordinates of the vertex (7,8) and of a point (-4,-9) on a parabola. Find the equation of the parabola Click here to see answer by nerdybill(6962)
 Question 625171: You are given the coordinates of the vertex (7,8) and of a point (-4,-9) on a parabola. Find the equation of the parabola Click here to see answer by oscargut(891)

 Question 625211: This is actually for QUADRATIC FORMULA, NOT QUADRATIC EQUATION Solve by completing the square 2x^2 + 11x - 1 = 0 The solution set is { } Click here to see answer by josmiceli(9697)

 Question 625252: Solve by completing the square m^2 - (25/2)m = 5/2 The solution set is { } I got this but it says it is wrong m = (-25 + or - sqr root 665)/ 4 Click here to see answer by josmiceli(9697)

 Question 625287: Given that (x+1) is one of the factors of P(x), then find the rest of the factors of P(x), where Click here to see answer by nerdybill(6962)

 Question 625327: x(10x-1)=0 Click here to see answer by oscargut(891)

 Question 625326: 5t2+7t=0 Click here to see answer by oscargut(891)

 Question 625414: if an M-16 is fired straight upward, then the height h(t) of the bullet in feet at time t in seconds is given by h(t) = -16t^2 + 325t a. what is the height of the bullet 5 seconds after it is fired ? evaluate h(5) b. How long does it take for the bullet to return to earth ? Click here to see answer by lwsshak3(6522)

 Question 625217: Find the vertex, line of symmetry,and the maximum or minimum value of f(x), graph the function. f(x)=(1)/(3)(x+1)^(2)+6 Click here to see answer by lwsshak3(6522)

 Question 625213: I need help, I am stuck on this word problem from Quadratic Equations: The number of tickets sold each day for an upcoming performance of Handel's Messiah is given by N(x)=-0.5x^2+11x+15, where x is the number of days since teh concert was first announced. When will the daily ticket sales peak and how many tickets will be sold that day? Click here to see answer by lwsshak3(6522)
 Question 625213: I need help, I am stuck on this word problem from Quadratic Equations: The number of tickets sold each day for an upcoming performance of Handel's Messiah is given by N(x)=-0.5x^2+11x+15, where x is the number of days since teh concert was first announced. When will the daily ticket sales peak and how many tickets will be sold that day? Click here to see answer by jsmallt9(3296)

 Question 624255: A boat traveled downstream a distance of 128mi and then came right back. If the speed of the current was 7mph and the total trip took 5hrs and 20mins, find the average speed of the boat relative to the water. Click here to see answer by lwsshak3(6522)

 Question 625458: Use complete sentences to explain how you would use graphing technology to find the solutions of 0 = −x2 + 2.5x + 1. What do the solutions of 0 = −x2 + 2.5x + 1 represent on the graph of the equation? Click here to see answer by jsmallt9(3296)

 Question 625462: In a race, Car A starts 1 mile behind Car B. Car A is traveling at 65 miles per hour, while Car B is traveling at 45 miles per hour. How long will it take for Car A to overtake Car B? Click here to see answer by reynard2007(52)

 Question 625481: How would you solve for x, using the quadratic formula? x^2+x-1=0 Thank you! Click here to see answer by jim_thompson5910(28598)
 Question 625481: How would you solve for x, using the quadratic formula? x^2+x-1=0 Thank you! Click here to see answer by oscargut(891)

 Question 625471: How would you solve this problem using "completing the square?" 4x^2+32x+20=0 Thank you! Click here to see answer by solver91311(16897)

 Question 625492: How do you simplify problems with an imaginary number? (3-i)/(5+2i) (division) (2+i)/(3-4i) Thank you so much! Click here to see answer by richwmiller(9143)
 Question 625492: How do you simplify problems with an imaginary number? (3-i)/(5+2i) (division) (2+i)/(3-4i) Thank you so much! Click here to see answer by solver91311(16897)

 Question 625490: How would you solve these two problems using completing the square? 4x^2+32x+20=0 & x^2+10x+10=0 thank you so much! Click here to see answer by solver91311(16897)

 Question 625493: How would you determine what solution type this problem is, using the discriminant? 5x^2+10=7x Click here to see answer by solver91311(16897)

 Question 625505: How would you predict the nature of solutions in equation using the discriminant? 2x^2+5x=7 Click here to see answer by solver91311(16897)

 Question 625500: How do you solve this problem using the square root property? (3x+1)^2-5=0 Click here to see answer by solver91311(16897)

 Question 625504: How you solve this problem by using the quadratic formula? The 100, 140 is having me confused. 3x^2-2x+1=0 Click here to see answer by solver91311(16897)

 Question 625503: How would you solve this problem, by factoring? x^3+3x^2-7x=21 thank you! Click here to see answer by jankiz(13)

 Question 625526: Not sure where to put this - it IS a quadratic function where I need to find the vertex, line of symmetry, the maximum or minimum value of the quadratic function. f(x) = -2x^2 + 2x + 1 The x-coordinate of the vertex is: (Type a simplified fraction) The y-coordinate of the vertex is: (Type a simplified fraction) The equation of the line of symmetry is: (Type an equation. Use integers or fractions for any numbers in the equation.) The maximum/minimum of f(x) is: (Type a simplified fraction.) The value of f(1/2) = (3/2) is a a) minimum b) maximum Any help is greatly appreciated. Thank you! Click here to see answer by lwsshak3(6522)

 Question 625614: Find all real or imaginary roots of 5x^2+6x+5=0 Click here to see answer by reynard2007(52)

 Question 625622: 10x^2+7x-6=0 Click here to see answer by reynard2007(52)

 Question 625625: Good morning! Looking for some help on a math question. Any help is greatly appreciated! Find the vertex, line of symmetry, and the maximum or minimum value of f(x). f(x)= 1/2 〖(x+3)〗^2+1 The vertex is (Type an ordered pair.) The line of symmetry is (Type an equation.) What is the max/min value of f(x)? Is the value, f(-3) = 1, a minimum or maximum? Click here to see answer by Alan3354(30993)

 Question 625649: how would i find the solution set to this equation m to the second power + 9m =0 Click here to see answer by reynard2007(52)

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