Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 464739: I am having trouble with finding the x - intercepts for p(x)=-x^2+812-9600
Click here to see answer by sofiyac(983)

Question 465553: A river has a current of 5mph. It takes Al half an hour longer to paddle upstream 1.2 miles than to paddle downstream the same distance. What is Al's rate in still water.

Setting word problems up always seems to be more difficult than setting them up. I need to find a quadratic equation then solve with this problem.
Click here to see answer by ankor@dixie-net.com(22740)

Question 465533: Solve the quadratic equation x2 - x = 30 by completing the square
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Question 465854: Solve x=3 & x=9
Click here to see answer by stanbon(75887)

Question 465858: Solve
Click here to see answer by kingme18(98)

Question 465873: Hi I'm working on a take home test right now & i need your help!
my problem is
i believe iv found ..
Vertex: (-3,4)
axis of symmetry: -3
y-intercept: (0,5)
&
Domain: all real #s
..but im not sure my answers are right ..?
and im not sure on how to find the x-intercept and the range!? could someone please help me..
Click here to see answer by Edwin McCravy(20054)

Question 465920: Last month, Jacob traveled from Miami to New Orleans by train and made two stops along the way. The average speed for the three legs of his trip is defined as v1, v2, v3 respectively. The average speed for the entire trip is given by
3
____________
1---1---1
__ + ___ + __
v1----v2----v3
a. Simplify the complex fraction.
b. Find the average speed for the entire trip when v1 = 101mph, v2 = 71mph,
v3 = 106mph. Round to the nearest mph.

Click here to see answer by robertb(5830)

Question 465919: Simplify the variable expression below.
(1/9a) - (2/3a)
a. -5/18a
b. -5/9a
c. 7/9a
d. 5/9a
e. -7/9a
Click here to see answer by robertb(5830)

Question 465915: Find all the real solutions of the following equation as a quadratic equation.
6n^2/3 + n^1/3 - 15 = 0

Click here to see answer by robertb(5830)

Question 465985: I can't solve this problem can you help
x=5 x=2
and
x=1 x= -4
Click here to see answer by sofiyac(983)

Question 465916: 4/2x+1 - 2/x-2 = 1/2x+1 Solve rational equation
a.-10
b.-17
c.-5
d.-8
e.-3
Click here to see answer by sofiyac(983)

Question 466065: This on states, solve by completing the square:
m^2 - 1/2m = 7/2
Click here to see answer by ewatrrr(24785)

Question 466075: X= 5 X=2 and X=1 X= -4
Click here to see answer by sofiyac(983)

Question 466075: X= 5 X=2 and X=1 X= -4
Click here to see answer by Alan3354(69443)

Question 465855: solve 3x & -3x
Click here to see answer by richard1234(7193)

Question 466249: Problem Solving: A sunflower plant was purchased with the following growth guarantee. After being planted, on the first day it would grow 100 mm. On the second day its height would increase by one half (50%), on the third day by one third, on the fourth day by one fourth, and so on. Assuming that the plant actually grows according to the guarantee, how many days would it take for it to reach its maximum height of 5000 mm?
Click here to see answer by ankor@dixie-net.com(22740)

Question 466380: 2.
(A)Write the quadratic function f(x)=x�-6x+14 in the form f(x)=a(x-h)�+k by completing the square and
(B)graph the function.
Please show all of your work. Submit your graph.
Click here to see answer by lwsshak3(11628)

Question 466415: the manager of farmer's delight bought a load of watermelons for $750 and priced the watermelons so that he would make a profit of $2 on each melon. when all but 100 of the melons haad been sold, he broke even. how many did he buy originally?
Click here to see answer by solver91311(24713)

Question 466382: 4. Determine the quadratic function,f(x)=ax�+bx+c , whose vertex is (1, -2) and passes through the point (-1, -22). Please show all of your work. (Points : 5)
Click here to see answer by solver91311(24713)

Question 466449: Factoring by Grouping
5sx-5kx-4sy+15hx-12hy+4ky
Click here to see answer by kelsiesmurf(9)

Question 464382: Hi you guys, here is my last question of the day:
"Give exact and approximate solutions to three decimal places for the following problem:"
x^2-7x+11=0
Click here to see answer by kelsiesmurf(9)

Question 466614: Find 2 numbers whose difference is 16 and whose product is minimun
Click here to see answer by Edwin McCravy(20054)

Question 466614: Find 2 numbers whose difference is 16 and whose product is minimun
Click here to see answer by Gogonati(855)

Question 466617: 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).

a. Does the graph of this equation open up or down? How did you determine this?

b. Describe what happens to the tickets sales as time passes.
c. Use the quadratic equation to determine the last day that tickets will be sold.
Note. Write your answer in terms of the number of days after ticket sales begin.

d. Will tickets peak or be at a low during the middle of the sale? How do you know?

e. After how many days will the peak or low occur?

f. How many tickets will be sold on the day when the peak or low occurs?

g. What is the point of the vertex? How does this number relate to your answers in parts e. and f?

h. How many solutions are there to the equation ? How do you know?

i. What do the solutions represent? Is there a solution that does not make sense? If so, in what ways does the solution not make sense?

Click here to see answer by richard1234(7193)

Question 466656: 4. Determine the quadratic function,f(x)=ax�+bx+c , whose vertex is (1, -2) and passes through the point (-1, -22). Please show all of your work.
I appreciate any help! Thanks!
Click here to see answer by stanbon(75887)

Question 466661: 8. For the following function find the vertical, horizontal, and oblique asymptotes, if any. Please show all of your work.
f(x)=16x�/3x�-17x+10
+7

I appreciate any help!Thanks
Click here to see answer by stanbon(75887)

Question 466674: Help...spent two nights on these and cannot solve.
A) During the first part of a trip, a canoeist travels 63 miles at a certain speed. The canoeist travels 10 miles on the second part of a trip at a speed of 5 mph slower. The total time for the trip is 4 hours. What was the speed on each part of the trip?
B) Write a quadratic equation having the given numbers as a solution; -6,-2.
C) Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form ax^2+bx+c=0; -sqrt 5, 3 sqrt 5.
Thank you so much for your help!!!
Click here to see answer by Alan3354(69443)

Question 466687: please help me under stand how to do this
4x^4-11x^2+6=0
thank you
Click here to see answer by mananth(16946)

Question 466714: 16y^3+24y^2-16y
Click here to see answer by stanbon(75887)

Question 466752: Find the vertex, line of symmetry to this problem:
f(x)= 2x^2 - 12x + 11
Click here to see answer by stanbon(75887)

Question 466747: write a quadratic equation having the given numbers as soulutions -5 and -1
Click here to see answer by Alan3354(69443)

Question 466765: Please help me solve: The number of tickets sold for a Broadway musical is given by N(x)= -0.4x^2 + 12x + 12 where "x" is the number of days since the concert was first announced. When will daily tickets sales peak and how many tickets will be sold that day?
N(x)= -0.4x^2 + 12x + 12
Click here to see answer by ccs2011(207)

Question 466797: x^2+12x-64=0
Click here to see answer by Ryan O'Hara(46)

Question 466815: 5x + x(x - 1)= 0
What are the solutions?
Find the x-intercepts. Type an ordered pair
Click here to see answer by Ryan O'Hara(46)

Question 466904: Find the domain of the function and express the answer in interval notation. Explain in words and show the calculations
13x^2-5x+9=0
Thank You
Click here to see answer by stanbon(75887)

Question 466912: If 2x-3-5 then x=

Click here to see answer by Big Poop(157)

Question 466796: Type an exact answer, using radicals as needed. Rationalize all denominators. Express complex numbers in terms of i. Use comma to seperate answers as needed.
Find x-inteceptors of: f(x)= 4x^2 = 12
Type an ordered pair
Click here to see answer by Alan3354(69443)

Question 466940: Bayside Insurance offers two health plans. Under plan A, Giselle would have to pay the first $50 of her medical bills, plus 30% of the rest. Under plan B, Giselle would pay the first $90, but only 25% of the rest. For what amount of medical bills will plan B save Giselle money? Assume she has over $90 in bills.
Click here to see answer by Big Poop(157)

Question 466722: the perimeter and area of rectangle are 22cm are 30cm square respectively. find the length and breath of the rectangle
Click here to see answer by ankor@dixie-net.com(22740)

Question 467061: A projectile is launched into the air with an initial upward velocity of 24 feet per second. The height (h) in feet of the projectile can be modeled by h = -16t^2 + 24t + 3, where t is the time in seconds after it was launched. How much time, in seconds, does it take the object to reach 12 feet above the ground?
( TOPIC: Quadratic Equations )
Click here to see answer by Alan3354(69443)

Question 467223: Hi! please help me solve this equation:
F(x)= 9x^3 - 4x / (x-3)(x^2 - 2x + 1)
Thank you!

Click here to see answer by Big Poop(157)

Question 467245: find the whole number such that twice its square added to itself makes 10
Click here to see answer by Big Poop(157)

Question 467247: find two consecutive positive numbers such that the sum of their squares is equal to 113
Click here to see answer by Big Poop(157)

Question 467296: Quadratic Formula:
3(x-2)^2=48
Click here to see answer by stanbon(75887)

Question 467338: Solve this quadratic equation using the quadratic formula.
2x2 - 10x + 7 = 0
can you please show me how u get the answer please & thank you?!
Click here to see answer by jorel1380(3719)

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