Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 284117: how do I graph f(x)=-3x2 + 8x
Click here to see answer by nyc_function(2741)

Question 284358: a jet flew from tokyo to bangkok, a distance of 4800km. on return trip, the speed was decreased by 200 km/h. if the difference in times f the flights was 2 hours, what was the jet's speed from bangkok to tokyo?
Click here to see answer by richwmiller(17219)

Question 284371: determine the nature of the solutions to the equation x2+5x-2=0
Click here to see answer by Alan3354(69443)

Question 284186: Discuss two examples where you use a quadratic function and another where you use a radical equation.
Click here to see answer by alex224(8)

Question 284087: I need help with this one homework question.
A ball is thrown into the air with an initial upward velocity of 60ft/sec. Its height (h) in feet after 1 sec is given by the function h=-16t2(2= squared cant make a little 2)+60t +6
a: after how many seconds will the ball hit the ground?
b: what will the height be at if t= 3 seconds
i think for part be the answer is 42 ive plugged in 3 for t and got 42 i have no idea how to get part A
Click here to see answer by Alan3354(69443)

Question 284420: I need help in understanding "completing the square for a quadratic function" My problem is the following
Rewrite each function in the from f(x)=a(x-h)2 + k
(a) f(x)=x2 + 6x (b) f(x)=2x2 - 20x + 3
Click here to see answer by solver91311(24713)

Question 284409: f(x) = -x^2 - 6x - 13 in vertex form is -(x + 3)^2 - 4
True or false?
Click here to see answer by Fombitz(32388)

Question 284479: What is the formula for a exponential equation?
Click here to see answer by nyc_function(2741)

Question 284646: find the side of a square with an area of 256m2 using quadratic equation then solve
Click here to see answer by richwmiller(17219)

Question 284587: A picture frame is 18 cm by 14cm. There are 192 cm2 of picture showing. Find the width of the frame.
Click here to see answer by mananth(16946)

Question 284791: find the vetex, line of symmetry and min/max value for:
f(x)= -3 (x-7)^2 + 4
Click here to see answer by stanbon(75887)

Question 284708: The height of a ball after being dropped from a point 100 ft above the ground is given by: h(t)=-16t^2+100.
When will the ball be 60ft above the ground?
What is the max. height reached?
When will the ball reach the ground?
Click here to see answer by toidayma(44)

Question 284790: Suppose that r1 and r2 are the roots of the quadratic equation ax2 + bx + c = 0.
Note that:
(x � r1)(x � r2)= x2 � (r1 + r2)x + r1r2.
Explain how to use this result to check the solutions of a quadratic equation of the form x2 + bx + c. Then use the result to check that �3 + 2i and �3 � 2i are solutions of the equation x2 + 6x + 13 =0.

Click here to see answer by richwmiller(17219)

Question 284863: 3x^2-6x-2=0 can you please help me answer this problem, i tried completing the square and the quadratic formula but i cant get the answer
Thanks David
Click here to see answer by Fombitz(32388)

Question 284953: x^2-25=0
Click here to see answer by checkley77(12844)

Question 285044: 1.express y=(x-2)^2+4 in standard form.

Click here to see answer by richwmiller(17219)

Question 285064: a special olympics event has 2 more boys than girls competing. the total number of paticipants is 1000. how many girls competed and how many girls competed?
Click here to see answer by Deina(147)

Question 285245: solve using quadratic formula
r^2+3r-3=0
Click here to see answer by toidayma(44)

Question 285354: z^2+18=-11z
Click here to see answer by user_dude2008(1862)

Question 285407: 1. Can some one solve this -x^2 + 4x + 4

Click here to see answer by richwmiller(17219)

Question 285392: how do you find zeroes in a quadratic function?

Click here to see answer by richwmiller(17219)

Question 285433: Hello. My name is Mia. I don't know how to put the following question into a rational expression. Dr. Taylor can see 10 patients in 5 hours. At this rate, how long would it tke him to see 40 patients?

Click here to see answer by richwmiller(17219)

Question 285454: How do you find the roots and degree for : h(x)=x(x�-x-6)
Click here to see answer by edjones(8007)

Question 285490: to which of th following situations can the functions y=5x+10 be aplied
Click here to see answer by solver91311(24713)

Question 285566: Two cars start at Pittsburgh, one driving east and the other west. The car headed east drives 10 miles per hour faster than the car headed west. How fast is the slower car traveling if, after 8 hours, the cars are 1,040 miles apart?
Click here to see answer by josmiceli(19441)

Question 285607: I Need help with how to write an quadratic equation only use two numbers.
-3 and -1 must =0
Click here to see answer by stanbon(75887)

Question 285634: Having trouble solving , tried the problem solver and got a particularly complicated solution that I can't prove.
Click here to see answer by nabla(475)

Question 285653: i need more than 1 problem please. heres the problems:
evaluate: 3a + (k + 5b) - 9=? if a=7 & b=4 & k=10
find the 7th term in the sequence: 20 1/2, 23 1/3, 26 1/6 29...
evaluate: -6a-4b= ? if a=5 and b=3??
please! thanks
Click here to see answer by stanbon(75887)

Question 285663: y^2-4y=0
Click here to see answer by Alan3354(69443)

Question 285697: 4x(x-1)-5x(x)=3 solve for x

please help and thankyou
Click here to see answer by nyc_function(2741)

Question 285401: What is the product of two consecutive numbers that is less than 10 times the smaller number?
Click here to see answer by jsmallt9(3758)

Question 285401: What is the product of two consecutive numbers that is less than 10 times the smaller number?
Click here to see answer by richwmiller(17219)

Question 285399: 5x^2+16x-84=0
Click here to see answer by jsmallt9(3758)

Question 285385: show all work for the following math problem: Annie Pelletier won a bronze medal in the wonmen's spring board competition at the 1996 olympics in atlanta.She somersaults from a 3-m bord. Her height, h metres, above the water t seconds after she leaves the springboard is given by h=-4.9tsquared+8.8t+3 what is the value of h when Palletier hits the water? what quadratic equation represents this situation?
Click here to see answer by jsmallt9(3758)

Question 285242: x^2=4x-29
Click here to see answer by jsmallt9(3758)

Question 285066: please help me solve this, its a triangle with a hypotenuse of 12, leg a is x and leg b is (x+5)
Click here to see answer by scott8148(6628)

Question 285233: 16x^2-8x+1=0
Click here to see answer by jsmallt9(3758)

Question 285804: x�-2k(x+3)=6x+3 has equal roots
Click here to see answer by richwmiller(17219)

Question 285822: one root of quadratic equation 3x square - 10 x +3=o is 1/3.find other root
Click here to see answer by Grinnell(63)

Question 285822: one root of quadratic equation 3x square - 10 x +3=o is 1/3.find other root
Click here to see answer by stanbon(75887)

Question 285835: a chemist need 80 millitiltes of 25% solution but only has 22% and 30% solutions available How many milliliters of each that should be mixed to get the desired solution number of mill of 22% and the number of mill for 30%
Click here to see answer by stanbon(75887)

Question 285937: Find the quadratic equation with roots which are the squares of the roots of
x^2 -5x -3 =0
Click here to see answer by richwmiller(17219)

Question 285948: The problem is: One number is 8 more than the second number. Twice the second number is one more than the first. Find the numbers.
Click here to see answer by oberobic(2304)

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, 20251..20295, 20296..20340, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240