Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 120095: 6 is what % of 50
Click here to see answer by josmiceli(9817)

Question 120137: USE THE QUADRATIC FORMULA TO SOLVE:

x^2 - x/1 =1
2
*Note. Problem reads, x Squared over 2, minus x over 1 = 1
Use Quadratic Formula To solve
Click here to see answer by stanbon(57960)

Question 120143: What type of function does the following table of values represent?
x: -21,-18,-15,-12,-9
y:3,6,12,24,48

Click here to see answer by stanbon(57960)

Question 120151: A quadratic equation has roots 1+-2i.What is the equation?
Click here to see answer by ankor@dixie-net.com(15746)

Question 120247: graph:

y=x² y=-x²
Click here to see answer by checkley71(8403)

Question 120251: What value of b will make the expression x^2-bx+40 a perfect square?
Click here to see answer by stanbon(57960)

Question 120256: Using the following sequence (-1,-5,-9,-13,...) find the function tn.
Click here to see answer by stanbon(57960)

Question 120256: Using the following sequence (-1,-5,-9,-13,...) find the function tn.
Click here to see answer by bucky(2189)

Question 120255: Bill used completing the square to find the zeroes of the function . How is this done ?
Click here to see answer by MathLover1(6810)

Question 120255: Bill used completing the square to find the zeroes of the function . How is this done ?
Click here to see answer by Edwin McCravy(8999)

Question 120253: What is the standard form of the function -1/2(y+1)=(x-2)^2 ?
Click here to see answer by MathLover1(6810)

Question 120150:
What would be the nature of the roots of the quadratic equation x(x-1)-3=5x?
Click here to see answer by checkley71(8403)

Question 120363: What is the solution for using the quadratic formula? Please explain how you got the answer in steps.
Click here to see answer by jim_thompson5910(28705)

Question 120418: 1)Could you please help me sole for the following equations
Solve the following by factoring:
a)x squared minus 6x minus 16=0
Answer:
Show your work here:
b) 6x squared plus 42 x=0
Please solve for the following.
Show work here
Click here to see answer by jim_thompson5910(28705)

Question 120419: 2) If f(t)=2t squared minus 4t minus 1,find
a) f(2)
Answer:
Show your work here:

b) f(-1)
Answer:
Show your work here:

Click here to see answer by jim_thompson5910(28705)

Question 120455: how do you reduce -4+sq.root of 40/-2
Click here to see answer by jim_thompson5910(28705)

Question 120485: Could you please help me solve for the following problem
Find the corresponding y values for x = -4, -3, -2, -1, 0, 1, 2 if y=x squared plus 2x minus 3.
Could you please show your work.
Thank You
Click here to see answer by MathLover1(6810)

Question 120482: An astronaut standing on the surface of the moon throws a rock upward. The height of the rock is given by s=-2.7t^2+27t+6.3, where s is the height in metres and t is the time in seconds.What was the initial height of the rock?
Click here to see answer by stanbon(57960)

Question 120476: What are the roots of the equation x^2+9=0 I got x=+-3i,can someone explain?
Click here to see answer by tutor_paul(490)

Question 120478: What is the equation of the quadratic function under the following transformations of the basic quadratic function y=x^2 : a vertical stretch of 2/5 , a vertical translation of -3 units and a horizontal translation of 2 units ? I said 5/2(y+3)=(x-2)^2 but I'm not sure.
Click here to see answer by stanbon(57960)

Question 120473: If a sequence contains the terms tn=-2n^2-5n+10,what is the value of t25? I got 2385 can someone please explain?
Click here to see answer by stanbon(57960)

Question 120474: What are the EXACT values of the roots of the quadratic equation 1/2(x^2-6x)=2 ?
Click here to see answer by stanbon(57960)

Question 120627: Solve 4X^2-13X=12
Click here to see answer by nabla(475)

Question 120767: Solve. -9(x-3)^2=-7
Click here to see answer by madhan_math(34)

Question 120777: Debbie has 80 metres of fencing to make a rectangular dog pound of dimensions length ,L,and width, W. What is the equation of the area of the dog pound as a function of length?
Click here to see answer by rapaljer(4667)

Question 120779: What is the equation of the axis of symmetry for the parabola y=2x^2-6x+5?
Click here to see answer by bucky(2189)

Question 120709: what is the answer step by step to the following quadratic equations ?
x squared-4x-15=0
x squared+8x-33=0
x squared+5x+2=0
3xsquared-3x+6=0
Help would be great i need it bad
Click here to see answer by ankor@dixie-net.com(15746)

Question 120780: Using the following sequence,determine what type of function describes the sequence. Once you determine the type of function,find the function algebraically.(4,9,17,28,42,59,...)
Click here to see answer by Fombitz(13828)

Question 120783: a)Mary invested $600 at the Royal Bank at an interest rate of 3.6% per year.How much money will she have after 12 years?
b)The half-life of radium is 1400 years. If there was 800 grams of radium, how much will remain after 5000 years?
Click here to see answer by stanbon(57960)

Question 120774: A football is kicked into the air and follows the path defined by h=-2x^2+16x, where x is the time in seconds and h is the height in metres.What is the maximum height reached by the football?
Click here to see answer by bucky(2189)

Question 120708: what is the answer step by step to the following quadratic equations ?
x squared-4x-15=0
x squared+8x-33=0
x squared+5x+2=0
3xsquared-3x+6=0
Help would be great i need it bad
Click here to see answer by jim_thompson5910(28705)

Question 120821: Find the constant term that should be added to make the following expression a perfect-square trinomial.
x^2 + 18x
I come up wtih
x^2+2time9x+81 but I am not sure that this is correct.
Click here to see answer by jim_thompson5910(28705)

Question 120772: A quadratic function has x-intercepts at (-8,0) and (2,0).What is the transformational form of the function if the minimum y values is -3?
Click here to see answer by josmiceli(9817)

Question 120707: what is the answer step by step to the following quadratic equations ?

x squared-4x-15=0
x squared+8x-33=0
x squared+5x+2=0
3xsquared-3x+6=0
Help would be great i need it bad
Click here to see answer by checkley71(8403)

Question 120875: Find the length x if the shaded area is 480 cm^2.
The shape is a trapezoid.
What I've got so far is this:
480 = x^2 + 2x
x^2 + 2x + 48 = 0
Am I on the right track? If so, what do I do next? Thank you for your help!!
Click here to see answer by solver91311(17077)

Question 120925: I need help with this equation

24x+3x2=0
Click here to see answer by checkley71(8403)

Question 120877: a park planner has sketched a rectanular park in the first quadrent of a coordinate grid. wo sides of the park lie on the x- and y-axes. a trapezoidal flower bed will be bounded by the line y=x+7, the x-axis, and the vertical lines x=1 and x=a, where a is greater than 1. The areaA of the trapezoid is modeled by A=1/2a squared+7a-15/2. assume the lengthsamong the axes are measured in meters. For what value of a will the trapezoid have an area of 25 meters? use the quadratic formula to find the answer
Click here to see answer by solver91311(17077)

Question 120923: I need help with this equation
3x2-16x-12=0
Click here to see answer by jim_thompson5910(28705)

Question 120941: I need help with this quadric formula
x2-2x+8=0
Click here to see answer by checkley71(8403)

Question 120941: I need help with this quadric formula
x2-2x+8=0
Click here to see answer by edjones(7569)

Question 120921: I think this problem mostly has to do with the discriminant,but I tried the ways showed on the website and I'm still confused.
If 4x^2+kx+6=0 has one real root, find k.
Click here to see answer by stanbon(57960)

Question 120944: I need help with this quadratic equation
x2-2x+8=0

Click here to see answer by stanbon(57960)

Question 120961:
x squared minus 9x minus 36
Click here to see answer by checkley71(8403)

Question 121035: Hank Hill travels home to Whoville every weekend from Paradise. The distance each way is 800km/h. Anxious to return home, he decides to increase his speed by 20km/h and realizes that he arrives home 2 hours earlier than the time it took him to travel to Paradise. How long does the trip to Paradise usually take ?
Click here to see answer by stanbon(57960)

Question 121032: Solve by completing the square:4x^2+8x-7=0.Express roots in EXACT radical form.
Click here to see answer by Fombitz(13828)

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, 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