Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 371029: 4x^-15x+14=0
Click here to see answer by robertb(4012)

Question 371062: I am new to this site and need help with more than 5 problems per day. I need help with about 17 problems....any takers. Here is one.
9x^=48x-48
Click here to see answer by Fombitz(13828)

Question 371099: how do i find the answer for 2x^2-11x+12=0 i get stuck i know that you have to factor 12 to get -11 which be -12, 1 but from there i dont know what to do can you please help me?
Click here to see answer by mananth(12270)

Question 371220: A train runs in uniform speed and cover 360Km. If speed reduce by 8Km/hour, than it will take 4hours more than ptevious time to cover 360km. find the speed of train.

Click here to see answer by mananth(12270)

Question 371245: Reduce the rational equation to quadratic equation and find its roots.
6x+10/x + 3/x² = 0
Click here to see answer by mananth(12270)

Question 371249: Reduce the rational equation to quadratic equation and find its roots.
2x/x-1 + 19/1-x² = x+3/x+1
Click here to see answer by mananth(12270)

Question 371261: how do you complete the square, y=8-3x^2-2x
(3x^2)is suppose to be 3x squared
Click here to see answer by Edwin McCravy(8909)

Question 371351: If Jamar can run 3/5 of a mile in 2 minutes 30 seconds, what is his rate in miles per minute?
Click here to see answer by ewatrrr(10682)

Question 371301: 3 log x + log 2x=4.225
Click here to see answer by Fombitz(13828)

Question 371344: What is the solution set of the equation ?
Click here to see answer by ewatrrr(10682)

Question 371345: how do i find the completion of squares for the equation y2-5y+6=0
Click here to see answer by ewatrrr(10682)

Question 371345: how do i find the completion of squares for the equation y2-5y+6=0
Click here to see answer by stanbon(57377)

Question 371323: how do i solve y=x to the second power +1

Click here to see answer by Fombitz(13828)

Question 371392: 3x^2+8x=9+2x How do I factor and solve using the zero principle?

Click here to see answer by ewatrrr(10682)

Question 371413: Solve using quadratic formula
2x^2+3x+4=0
Click here to see answer by neatmath(300)

Question 371412: Solve using the quadratic formula
12t^2-5t=2
Click here to see answer by neatmath(300)

Question 371437: Identify the values of a, b, and c you would substitute into the quadratic formula to solve each of the following;
a) -2x^2 - 23x + 6 = 3x^2 + 15x
b) (x + 2) (x - 3) = (2x - 1) (x - 4)
Click here to see answer by lefty4ever26(59)

Question 371432: w^2-4w-5=0
Click here to see answer by Fombitz(13828)

Question 371578: x^2-10x+36=0
Click here to see answer by Fombitz(13828)

Question 371648: Factor completely: x^2 - 2x + y^2 + 2y - 2xy - 15
Click here to see answer by mananth(12270)

Question 371648: Factor completely: x^2 - 2x + y^2 + 2y - 2xy - 15
Click here to see answer by stanbon(57377)

Question 371735: How would I solve this problem... A flagpole casts a 32-ft shadow. A boy who is 6 feet tall is standing near the flagpole casting a 16-ft shadow. They form similar triangles. How tall is the flagpole?
Click here to see answer by rfer(12666)

Question 371745: How would I solve this equation... There are 21 females in the Algebra 1 class. If 75% of the class is female, how many students are there in the class?
I tried setting it up like this:
21 (.75)= x
x= 15.75

Click here to see answer by rfer(12666)

Question 371784: completing the square: 2x^2-6x+2=0

Click here to see answer by Fombitz(13828)

Question 371787: Find the minimum value of g(x)=5x^2+17x-3
Click here to see answer by nerdybill(6962)

Question 371028: THE NUMBER OF TICKETS SOLD EACH DAY FOR AN UP COMING PERFORMANCE OF HANDLES IS GIVEN BY N(X)= -0.4X^2 +8.8X +15, WHERE X IS THE NUMBER OF DAYS SCINSE THE CONCERT WAS FIRST ANNOUNCED. WHEN WILL DAILY TICKET SALES PEAK? ALSO, HOW MANY TICKETS WILL BE SOLD THAT DAY?
Click here to see answer by jsmallt9(3296)

Question 371873: solve the linear inequality, 6x+10<2(2x+11)
Click here to see answer by mananth(12270)

Question 371880: write an equation for the line passing through(4,4)and parallel to the line whose equation is 2x+y-7=0;slope-intercept form
Click here to see answer by Fombitz(13828)

Question 371878: write equation for the line in slope-intercept form.slope=3/4,y-intercept=2
Click here to see answer by Fombitz(13828)

Question 371796: FIND THE REAL OR IMAGINARY SOLUTION USING THE QUADRATIC FORMULAR X^-4X+53=0 AND WRITE THE QUADRATIC FUNCTION IN the form y=(x-h)^+k.
Click here to see answer by Fombitz(13828)

Question 371917: Find the exact volume of a cube with sides of length √3 meters.
Click here to see answer by Fombitz(13828)

Question 371904: If the difference of two numbers is 8 and their product is 13, what is the
sum of their squares?

Click here to see answer by Fombitz(13828)

Question 371849: Can someone tell me if I did these right. If not can someone please help me with these problems PLEASE.
Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour and your city is the first stop on the tour. You need to supply information about projected ticket sales to the box office manager. The box office manager uses this information to anticipate staffing needs until the tickets sell out. You provide the manager with a quadratic equation that models the expected number of ticket sales for each day x. (x=1 is the day tickets go on sale).
Tickets= -0.4x^2+20x+122.1
a. Does the graph of this equation open up or down? How did you determine this?
Downward, coefficient of the squared term is negative
b. What is the number of tickets sold on the 10th day? The 20th day? The 40th day? The 50th day?

T (10)= 182
T (20) = -0.4*(20) ^2+20*(20)+122.1
T (20) = -0.4*(400) +400+122.1
T (20) = -160+522.1
T (20) = 362.1
T (20) = 362
T (40) = -0.4*(40) ^2+20*(40) +122.1
T (40) = -0.4*1600+800+122.1
T (40) = -640+922.1
T (40) = 282.1
T (40) = 282
T (50) = -0.4*(50) ^2+20*(50) +122.1
T (50) = -0.4*2500+1000+122.1
T (50) = -1000+1122.1
T (50) = 122.1
T (50) = 122

c. Use the quadratic equation to determine the last day that tickets will be sold.
x = -5.5 and x = 55.55 the last day tickets will be sold

Note. Write your answer in terms of the number of days after ticket sales begin.
d. After how many days will the maximum or minimum occur?
55.55 - 60.05/2 = 25.525

e. How many tickets will be sold on the day when the maximum or minimum occurs?
374
f. What are the coordinates of the vertex? How does this number relate to your answers in parts d and e? 55
g. How many solutions are there to the equation ? How do you know?
2
h. What do the solutions represent? Explain.

Click here to see answer by Fombitz(13828)

Question 372009: Determine the solutions to the quadratic equation -10x2 + 30x - 20 = 0.
Click here to see answer by jsmallt9(3296)

Question 371931: Write one linear inequality that has ( 10,5) (-10, 20) (-20, -25) and (25, -10)
Please write an explanation has to how you came to the solution.
Click here to see answer by Fombitz(13828)

Question 372140: If I have a solution how can I create a quadric equation
Click here to see answer by solver91311(16897)

Question 371786: A model rocket is launched straight up from a platform. The height of the rocket is given by h(t)=-16t^2+266t+10
a. What is the altitude of the rocket 2 seconds after launching?
b. How high does the rocket go?
Click here to see answer by scott8148(6628)

Question 372236: v^2 + 6v - 46 = 9 Can you show me step by step solving v be completing the square? thanks
Click here to see answer by robertb(4012)

Question 372236: v^2 + 6v - 46 = 9 Can you show me step by step solving v be completing the square? thanks
Click here to see answer by solver91311(16897)

Question 372359: Factoring to solve equations
Solve:

Click here to see answer by unlockmath(1603)

Question 372396: -6(7+x)
Click here to see answer by user_dude2008(1861)

Question 372383: what is the maximum area of a rectangle with the perimeter of 120.
Click here to see answer by robertb(4012)

Question 372487: I need to use quadratic equations to find two real numbers that satisfy the sum of 15 and the product 36
Click here to see answer by mananth(12270)

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