Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

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(10682)

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(6950)

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(6469)

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(30983)

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(16868)

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(6950)

Question 616925: what number must be added to the polynominal x^2-11x ?
Click here to see answer by Alan3354(30983)

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(72)

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(9661)

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(6469)

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(6469)

Question 617138: how many times does the graph of y=16x^-8x+1 intersect the x-axis?
Click here to see answer by dragonwalker(72)

Question 617138: how many times does the graph of y=16x^-8x+1 intersect the x-axis?
Click here to see answer by jsmallt9(3296)

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(15638)

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(3458)

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(3296)

Question 617026: how do you use undoing with quadratic equation
Click here to see answer by KMST(1868)

Question 617501: 17x^2-4x+3=0 find the discriminate and tell how many solutions they are
Click here to see answer by lynnlo(4155)

Question 617512: (5y+3)^2+144=0
Click here to see answer by jim_thompson5910(28504)

Question 617510: Find the vertex and the intercept for y = x2 -2x -8
Click here to see answer by lynnlo(4155)

Question 617572: Choose the constant term that completes the perfect square trinomial.
x² - 18x
possible answers:
a.) +9
b.) +18
c.) +81
i chosse a.) + 9. is that correct?
Click here to see answer by lynnlo(4155)

Question 617573: When completing the square on the equation c² + 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(6950)

Question 617615: F(x)=3x2-2x+6
Click here to see answer by stanbon(57246)

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(9135)

Question 617682: (x + 2)^2 = 121
Click here to see answer by jim_thompson5910(28504)

Question 617744: solve by using the quadratic formula x squared minus two x equals 80 how do you solve this
Click here to see answer by Theo(3458)

Question 617862: ∠a and ∠b are supplementary. If m∠a = 2x + 4 and m∠b = 4x - 10, what is the measure of ∠a?
Click here to see answer by math33(31)

Question 617884: Hi. I'm stuck on this problem. "Find the value of 'n' such that is a perfect square trinomial."
Thanks
Click here to see answer by stanbon(57246)

Question 617911: X Power 3/2 = 10.41 then x=?
Click here to see answer by lwsshak3(6469)

Question 617997: Please help me with this problem:
Compute the positive square root of the discriminant of the parabola f(x) = -6x2 + (18)x + (2) to one place of decimal.
Click here to see answer by ankor@dixie-net.com(15638)

Question 618229: 4x2+3x-8=0
Click here to see answer by Maths68(1474)

Question 618324: A can of cola is 10 cms high.If a can were to be laid all around a rectangular ground measuring 10m by 6m.how many such cans will be needed?
Click here to see answer by mananth(12270)

Question 618369: The following question is asking to solve for x:
– =
I wasn't even sure if this was the right forum to ask. Any help would be great. Thanks.
Click here to see answer by richwmiller(9135)

Question 618424: The area of the Room is 55 square feet the length is 6 feet longer than the width find the length and width of the room? i have to put it in as a quadratic formula

Click here to see answer by ewatrrr(10682)

Question 618422: x^2-4x-6=0
Click here to see answer by ewatrrr(10682)

Question 618421: x2-4x-6=0
Click here to see answer by ewatrrr(10682)

Question 618436: The hypotenuse of a triangle is 5 feet long the longer of the two legs is one foot longer than the other find the length of the shorter leg
Click here to see answer by ewatrrr(10682)

Question 618477: factorise it 3y^2+13y+14
can u plz explain im confused
Click here to see answer by jim_thompson5910(28504)

Question 618477: factorise it 3y^2+13y+14
can u plz explain im confused
Click here to see answer by ewatrrr(10682)

Question 618504: A student throws her math instructor over a building. His height above the ground after t seconds is given by the equation:
h(t)=-16.1t^2+6t+75
How tall is the building?
Click here to see answer by swincher4391(726)

Question 618516: A student throws her math instructor over a building. His height above the ground after t seconds is given by the equation:
h(t)=-16.1t^2+6t+75
I know that his height in feet after 2 seconds is 22.6ft.
I know that his max height is 75.559 ft.
I cannot figure out how tall the building is though?
Can anyone help?
Click here to see answer by stanbon(57246)

Question 618531: Use a graphing utility to graph the quadratic function. Find the x-intercepts of the graph and compare them with the solutions of the corresponding quadratic equation when y=0.
y=x^2-9x+18

Click here to see answer by stanbon(57246)

Question 618535: f(x)=-1/3x^2
vertex?
equation of the line of symmetry?
Click here to see answer by stanbon(57246)

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