Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 614981: x^2+(x+1)^2=100
Click here to see answer by nerdybill(7384)

Question 614529: 2xsquared+20=13x
Click here to see answer by asuar010(338)

Question 614272: x^2-7x-44=0
Click here to see answer by asuar010(338)

Question 615083: Write a quadratic equation in the variable x having x having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0 solution: 3 only solution
Click here to see answer by stanbon(75887)

Question 615082: Solve for x
x^2-12x+35=15
Click here to see answer by stanbon(75887)

Question 615152: Need help finding the ho on this quadratic word problem the answer I tried to figure out is 6.74 seconds. The word problem is For an object dropped from a height ho above the ground,its height after t seconds is given by h(t)=-16t^2+ho,where H is measured in feet. A ball is dropped from the top 96 foot tall building. How long will it take to fall to the ground? How long will it take to fall half of the distance to ground level?
Im not really good with word problems

Click here to see answer by lwsshak3(11628)

Question 615208: I understand plugging in the number to get the value of x but what if you can't square root it or the square root is negative what would be your answer.
Click here to see answer by Alan3354(69443)

Question 615350: x2-5x-14=0 solve in completing the square in quadratic equation
Click here to see answer by nerdybill(7384)

Question 615350: x2-5x-14=0 solve in completing the square in quadratic equation
Click here to see answer by unlockmath(1688)

Question 615366: The height, y, of a ball tossed into the air can be represented by the equation y=-x^2+10x+3, where x is the elasped time. How many seconds does it take the ball to reach a height of 28 feet?

Click here to see answer by nerdybill(7384)

Question 615351: A farmer decides to enclose a rectangular field using the side of a barn as one side of the rectangle. The figure below shows the fenced area he wants to make.
If he has 2800 feet of fencing, what values of x and y will maximize the enclosed area?
x = ? feet
y = ? feet
Click here to see answer by jsmallt9(3758)

Question 615833: The width of a rectangle is
(3x − 1)
in. The length of the rectangle is twice the width. Find the area of the rectangle in terms of the variable x.
Click here to see answer by dragonwalker(73)

Question 615944: What are the solutions go 4x^2+5=-67?
Click here to see answer by JBarnum(2146)

Question 615944: What are the solutions go 4x^2+5=-67?
Click here to see answer by jsmallt9(3758)

Question 616151: Write the equation of the quadratic function with roots 6 and 10 and a vertex at (8, 2).
Click here to see answer by ewatrrr(24785)

Question 616219: the rectangle is represented by x2-5x-24. if the width of the rectangle is represented by x-8, express the length of the rectangle as a binomial

Click here to see answer by fcabanski(1391)

Question 616215: For the parabola passing through the points (1,1) (3,13) (5,49)
What is the equation in the form y=ax^2+bx+c?
What is the vertex of the parabola?
Click here to see answer by ewatrrr(24785)

Question 616310: What do the roots, (-7,0) (-3.0)(1,0)(5,0) of the equations: x^4+4x^3-34x^2-76x+105 tell me besides they are the x intercept?
Click here to see answer by jim_thompson5910(35256)

Question 616310: What do the roots, (-7,0) (-3.0)(1,0)(5,0) of the equations: x^4+4x^3-34x^2-76x+105 tell me besides they are the x intercept?
Click here to see answer by ewatrrr(24785)

Question 616490: (x^2-1)^2-14(x^2-1)+33=0
I need to find the solutions for this, but can not figure out how to solve it. Any help so I can learn this would be very much appreciated.
Click here to see answer by nerdybill(7384)

Question 616485: I am trying to find the solutions to:
(x^2-3)^2-43(x^2-3)+42=0
I can not figure out how to turn it into a quadratic and solve it.
Click here to see answer by lwsshak3(11628)

Question 616574: Amir pitched a baseball at an initial height of 5.9 feet with a velocity of 73.16 feet per second. About
how long will it take the ball Amir pitched to hit the ground?
Click here to see answer by Alan3354(69443)

Question 616578: Use complete sentences to explain how you would use graphing technology to find the solutions of
0 = .
Click here to see answer by solver91311(24713)

Question 616745: what is the minimum or maximum value of the quadratic formula
f(x)=2x^2-16x+20
Click here to see answer by nerdybill(7384)

Question 616925: what number must be added to the polynominal x^2-11x ?
Click here to see answer by Alan3354(69443)

Question 616922: 2 photos, a rectangle and a square: if the lgth of the rectangle is 3inches greater and the width is 2inches shorter than the lgth of one side of the square photo, what are the dimensions of each photo?
Click here to see answer by dragonwalker(73)

Question 616923: Amir pitched a baseball at an initial height of 5.9 feet with a velocity of 73.16 feet per second.
About how long will it take the ball Amir pitched to hit the ground?
Click here to see answer by josmiceli(19441)

Question 617053: y=3(x+4)^2+1
Vertex, axis of symmetry, x-int, y-int. this graph does not intersect the x=axis
And solve using the quadratic formula
Click here to see answer by lwsshak3(11628)

Question 617042: How do i find the x and y coordinate of the vertex, the line of symmetry, and the max/min of f(x) for the problem f(x)=-2^2+2x+7?
Click here to see answer by lwsshak3(11628)

Question 617138: how many times does the graph of y=16x^-8x+1 intersect the x-axis?
Click here to see answer by dragonwalker(73)

Question 617138: how many times does the graph of y=16x^-8x+1 intersect the x-axis?
Click here to see answer by jsmallt9(3758)

Question 616937: car A travels x km for every litre of petrol.while car B travels (x+5)km for every litre of petrol. if car A uses 4 litres of petrol more than car B in covering 400km, find the number of litres of petril used by car B for the journey.
Click here to see answer by ankor@dixie-net.com(22740)

Question 617184: A statistic professor conducts a study to investigate the relationship between the performance of his students on exams and their anxiety. Ten students from his class are selected for the experiment. Just before taking the final exam, the 10 students are given an anxiety questionnaire. Final scores are:
students No anxiety final exam
1 28 82
2 41 35
3 35 63
4 39 89
5 31 92
6 42 64
7 50 55
8 46 70
9 45 51
10 37 72
(a) construct a scatter plot of the paired scores. use anxiety as the X variable.
b. describe the relationship shown in the graph
c. Assuming the relationship is linear, compute the value of Pearson r.
d. determine the least-squares regression line for predicting the final exam score, given the anxiety level. should b(y) be positive or negative? why?
e. draw the least-squares regression line of part (d) on the scatter plot of part (a)
f. based on the data of the 10 students, if a student has an anxiety score of 38, what value would you predict for her final exam score? round to two decimals.
g. calculate the standard error of estimate for predicting for her final scores from anxiety scores. clinical, health, education
Click here to see answer by Theo(13342)

Question 617410: Find the two values of "b" for which the quadratic equation 4x^2+bx+49=0 has two real solutions
b=( ) b= ( )
Click here to see answer by jsmallt9(3758)

Question 617026: how do you use undoing with quadratic equation
Click here to see answer by KMST(5328)

Question 617501: 17x^2-4x+3=0 find the discriminate and tell how many solutions they are
Click here to see answer by lynnlo(4176)

Question 617512: (5y+3)^2+144=0
Click here to see answer by jim_thompson5910(35256)

Question 617510: Find the vertex and the intercept for y = x2 -2x -8
Click here to see answer by lynnlo(4176)

Question 617572: Choose the constant term that completes the perfect square trinomial.
x� - 18x
possible answers:
a.) +9
b.) +18
c.) +81
i chosse a.) + 9. is that correct?
Click here to see answer by lynnlo(4176)

Question 617573: When completing the square on the equation c� + 11c = 12, the resulting equation is:
a.)c+11/2=+- 13/2
b.)c+11/2= +-2 squareroot 3
c.)c+124/4=+-13/2
I choose b.

Click here to see answer by nerdybill(7384)

Question 617615: F(x)=3x2-2x+6
Click here to see answer by stanbon(75887)

Question 617674: The question is to simplify the following:
( / ) / ( / ) * ( / )
I got as far as:
( / ) / ( / ) which I got by multiplying the 2nd and 3rd part of the equation and adding all like terms. Now I�m stuck.
Please help!

Click here to see answer by richwmiller(17219)

Question 617682: (x + 2)^2 = 121
Click here to see answer by jim_thompson5910(35256)

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