Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 256689: 8x^6-18
Click here to see answer by Alan3354(30993)

Question 256849: How would you write:
(48/n + 3)*(n-2)-48
as a standard form of a quadratic equation?
Click here to see answer by CharlesG2(828)

Question 256940: compute the value of the disscrimnat and give the real solutions to the quadratic equation.
-9x^2-6x-1=0
Click here to see answer by drk(1908)

Question 257080: give exact and approximate solutions to three decimal places.
x^2+3x-5=0
thank you
Click here to see answer by drk(1908)

Question 257102: Decide on ANY ONE quadratic function of your choice whose graph will be a parabola. 1. Will your team's parabola open upwards or downwards?Why?
2. What’s the vertex of your team's parabola?
3. What’s the x-intercepts of your team's parabola?
4. Can you ever have parabolas that open to the left or which open to the right?Why?

Can someone please help me solvve this? I have submitted this question several times and no one has answered it. Thank you!!!
Click here to see answer by drk(1908)

Question 257156: A rectangular field with area 5000 meters squared is enclosed by 300 meters of fencing. Find the dimensions of the field.
Click here to see answer by unlockmath(1599)

Question 257155: When mineral deposits formed a coating 1mm thick on the inside of a pipe, the area through which fluid can flow was reduced by 20%. Find the original inside diameter of the pipe
Click here to see answer by edjones(7569)

Question 257185: How can I factor
18x2 -6x -4????
Click here to see answer by edjones(7569)

Question 257229: This has been asked before and Stan was the one who responded. I can see where he was going, but I don't like to just take an answer, I like to figure it out, too and see where I go. I am not getting the same answer, so I was wondering if someone can tell me where I am going wrong. Here is what I have been doing:
PROBLEM:
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. ( is the day tickets go on sale).

And when it comes to figuring out the last day of sales, I do this:
- .2x^2+12x+11
a= -.2 b= 12 c= 11
x= -(-.2)+- sqrt(12^2-4*(-.2)*11/2*(-.2)
x= .2 +- sqrt(144-(-.8)*11/-.4
x= .2 +- sqrt(144-(-8.8)/-.4
x= .2 +- sqrt(152.8)/-.4
And this is where I get lost.....I am getting decimals out the rear and can't figure out what I am doing wrong. Does this even look close??? I would really, really appreciate any help.... I'm about to give up... It's been 2 days working on this stupid problem. Ugh!!
Click here to see answer by Alan3354(30993)

Question 257258: The Expression is Y = 1/36x^2
Our teacher taught us to Use three steps to solve it.
Step One: x= -b/2a
- How would i incorporate that (1/36x^2) expression into this one?
Click here to see answer by drk(1908)

Question 257260: In my textbook it says that xy=4 is a quadratic equation. Is this a mistake? I understand that it is not a linear equation but I thought quadratics had to have second power variables
Can you help
Click here to see answer by drk(1908)

Question 257273: x^2-2x-3=0

Click here to see answer by CharlesG2(828)

Question 257381: Simplify. Write answers without negative exponents. Assume that the variables represent nonzero real numbers. w-4/w^6
Click here to see answer by drk(1908)

Question 257404: wqhat is 400x+16x=
Click here to see answer by richwmiller(9135)

Question 257408: find two consecutive positive odd number given that difference between their reciprocals is 2/63.
Click here to see answer by richwmiller(9135)

Question 257472: what is the axis of symmetry of this equation
y=2x2+8x-2

Click here to see answer by drk(1908)

Question 257472: what is the axis of symmetry of this equation
y=2x2+8x-2

Click here to see answer by stanbon(57347)

Question 257498: Find the possible value or values of n in the quadratic equation 2n2 – 7n + 6 = 0.
Click here to see answer by stanbon(57347)

Question 257409: if each student in a class sends a card to every one of his class mate the total number of cards sent out will be rs 1560. find the number of student in the class.
Click here to see answer by checkley77(12569)

Question 257601: I need to give the exact solutions to 3 decimal places:
x^2 + 2x + 1 = 25
Thank You
Click here to see answer by nerdybill(6958)

Question 257628: The sum of two numbers is 50 and the sum of their squares is 2050 .what are the numbers?

Click here to see answer by shahbazn(6)

Question 257636: For what values of k are the roots of 2x^2-3x + k = 0 equal?
Click here to see answer by richwmiller(9135)

Question 257663: One less than certain positive number multiplied by three times this number less two is 14. Determine the number
Click here to see answer by richwmiller(9135)

Question 257742: How do I find a quadratic equation that has -6 and 4 as solutions in the form of ax^2+bx+c=0
Click here to see answer by ankor@dixie-net.com(15652)

Question 257769: x^2=6x-18 I am looking for the solution set
Click here to see answer by checkley77(12569)

Question 257769: x^2=6x-18 I am looking for the solution set
Click here to see answer by dabanfield(803)

Question 257719: At birth the probability that a female will survive to age 65 is approx.8/10 the probability that a male will survive to age 65 is 2/3 what is the probability that both the male and female will be alive at age 65.What is the probablilty that only the male will be alive at 65? Find the probabiltiy that only the female will be alive at 65 and find the probability that at least one of the two will be alive at 65? I just don't understand this at all please help homework due soon. Thanks Susan
Click here to see answer by edjones(7569)

Question 257868: Give exact and approximate solutions to three decimal places for x^2 + 6x + 9 = 1
Click here to see answer by richwmiller(9135)

Question 257849: I am taking the TEAS test again next month, thes two problems were on the previous test. I have tried my best to figure them out but I'm stuck!! I would really appreciate any help I could get.
1. x\y - z = r*w
and the answers were
a. x = (z + r*w)
b. x = z*y (r*w)
c. x = r*w + y*z
d. x = y + 1\2 (r*w*z)
2. 1\3:x=1:3
a. 1\9
b. 1
c. 3
d. 9
Click here to see answer by edjones(7569)

Question 257911: i need to find the solution set for x squared - 2x-13=0
Click here to see answer by richwmiller(9135)

Question 257911: i need to find the solution set for x squared - 2x-13=0
Click here to see answer by nerdybill(6958)

Question 257949: They give me this example:x squared -8x-20=0
(x-10)(x+2)=0
x-10=0 or x+2=0
x=10 or x=-2

I do not understand were they get -10 and +2. Why not 5 and 4. Also why is the 2 positive.
Click here to see answer by Greenfinch(383)

Question 257897: I have to put x^2-6x+2 back into two binomials like a foil problem.
Click here to see answer by checkley77(12569)

Question 257961: x^2-6x=0
I need the answer ,and how you got the answer.
Click here to see answer by richwmiller(9135)

Question 257978: x^2+5x+5=x+1
Can I have some clarification? Please and thank you
Click here to see answer by Edwin McCravy(8909)

Question 257983: how do u get the answer for x4+3+42x
Click here to see answer by richwmiller(9135)

Question 257977: What is the points of intersection of these equations
y=x+3
x^2+y^2+4x-8y+11
Click here to see answer by Edwin McCravy(8909)

Question 257973: They gave me this word problem;
I'm thinking of a number. The square of this number is the same as the number times 4. What could my number be?
I have to have a explination.
Click here to see answer by edjones(7569)

Question 258019: 3x^2-3x-8=2x^2+2
Click here to see answer by unlockmath(1599)

Question 258022: Please help me graph this equation by hand:
I have already found the roots but I do not understand how do any of the other stuff
Click here to see answer by richwmiller(9135)

Question 258001: y-9=0
x^2+y^2-24x-10y+153=0
Click here to see answer by Greenfinch(383)

Question 258000: What is the points of intersection of these equations
x-2y-8=0
x^2=y^2-12x+6y+29=0
Click here to see answer by Greenfinch(383)

Question 258050: factor the following equation.
x^2 - x - 90 = 0.
Click here to see answer by drk(1908)

Question 258053: Determine the number of solutions of 2x^2 - 3x - 5 = 0
Click here to see answer by Greenfinch(383)

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