Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 329414: Aki's bicycle design had determined that when x hundred bicycles are built, the average cost per bicycle is given by C(x)=0.5x^2-0.4x+7.064 where C(x) is in hundreds of dollars. How many bicycles should the shop build to minimize the average cost per bicycle?
Click here to see answer by nyc_function(2741)

Question 329588: For what value of c will 3 x^2 - 2x + c = 0 have exactly one distinct real root?
A -2/3 B -1/3 C 0 D 1/3 E 2/3
Click here to see answer by mananth(16946)

Question 329607: I really need help with this quadratic equation and check. Thank you for all your help.
1/4x� + 17/4 = 2x
Click here to see answer by Fombitz(32388)

Question 329607: I really need help with this quadratic equation and check. Thank you for all your help.
1/4x� + 17/4 = 2x
Click here to see answer by Theo(13342)

Question 329609: This problem says to find all real and imaginary solutions. I don't even know were to start, I know I need to use the quadratic. Thank you
x� + x + square x� + x - 2 = 0
Click here to see answer by Alan3354(69443)

Question 329600: If h (x) = a x 2 + bx + c, where b 2 - 4ac < 0 and a < 0, which of the following statements must be true?
I. The graph of h (x) has no points in the first
or second quadrants.
II. The graph of h (x) has no points in the third
or fourth quadrants.
III. The graph of h (x) has points in all quadrants.
(A) I only
(B) II only
(C) III only
(D) I and II only
(E) None of the statements are true.
Click here to see answer by Theo(13342)

Question 329610: Here we go again. Quadratic equations. Find all real and imaginary solution by method of choice. These are hard for me to understand. Thank you.
2x - 5 = square 7x + 7
Click here to see answer by Alan3354(69443)

Question 329656: If the roots of a quadratic equation are -3/2 and 4/5 , find one possible equation.
Click here to see answer by stanbon(75887)

Question 329715: 2x^3+6x^2+3x+9
Click here to see answer by Earlsdon(6294)

Question 329742: Solve for x
x^2-x+1=0
x=
Click here to see answer by texttutoring(324)

Question 329743: Solve by completing the square
x^2+2x-3=0
x=
Click here to see answer by texttutoring(324)

Question 329740: f(x)=x^2-10x-5
Value=
x=
f(x)=
Is it max or min?
Click here to see answer by Alan3354(69443)

Question 329744: f(x)=3x^2-30x+79
value=
x=
Is it max or min?
Click here to see answer by Alan3354(69443)

Question 329741: f(x)=2x^2-8x+18
value=
x=
f(x)=
Is it max or min?
Click here to see answer by Alan3354(69443)

Question 329714: 3x^2=27
Click here to see answer by checkley77(12844)

Question 329713: x*2+12x-9=4x
Click here to see answer by checkley77(12844)

Question 329705: solve for t: at^2 + cz = b
Click here to see answer by checkley77(12844)

Question 329786: Solve the quadratic equation:
(x-1)^2+49=0
Click here to see answer by mananth(16946)

Question 329704: A. solve for x: x^2+50=10
B. 3x^2=2: solve for x and give x and y intercepts
C.3x^2-5x-7=0: solve for x and give x and y intercepts
D.N(x)=-0.4x^+11.2x+14 : give the value of x for the number of tickets sold, when they will peak and how many sold that day. could you please show me how this fits into the equation.
Click here to see answer by edjones(8007)

Question 329830: If x^2 - 5x + 6 = (x - h)^2 + k, what is the value of k?
(A) - 25/4 (B) -5/2 (C) -1/4 (D) 0 (E) 6

Click here to see answer by stanbon(75887)

Question 329912: the length of a rectangle is twice the width. the area is 392. what is the lenght and width
Click here to see answer by Alan3354(69443)

Question 329898: simplify and show work

Click here to see answer by Alan3354(69443)

Question 330044: #1, Hat sizes are determined by measuring the circumference of one's head in either inches or centimeters. Use ration and proportion to complete the following table.
Hat Size Head Circumference Head Circumference
(to nearest 1/5 inch) (to nearest centimeter)
7 1/2 23 3/5 60
7 3/8 _____ ______
#2, The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car traveling 30 mph can stop in 50 ft., how many feet will it take the same car to stop when it is traveling 20 mph?

Click here to see answer by stanbon(75887)

Question 330056: How can you find the solutions of a quadratic equation by looking at a graph. How do you find the vertex?
Click here to see answer by Fombitz(32388)

Question 330100: How many real-number solutions does 0 = x 2 - 7x + 1 have?
(A) None (B) One (C) Two (D) All real numbers
(E) It is impossible to determine.
Click here to see answer by mananth(16946)

Question 330123: Wrie a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0. Solution 3, only solution. The solution is?
Click here to see answer by Fombitz(32388)

Question 330143: I'm on college and math is not my subject. I have tried to work these problems, but I just can't get them. Please help me solve the Quadratic equation x2-2x-13=0 and 4x2-4x+3=0 Thanks so much.
Click here to see answer by privani(34)

Question 330163: s^2+s-42=0 solve for s
Click here to see answer by stanbon(75887)

Question 330166: (x+6)(x-15)(x+2)is greater than 0 what is the solution set?
Click here to see answer by stanbon(75887)

Question 330165: (-3t)^2(2t^8)^3=
Click here to see answer by Fombitz(32388)

Question 330169: x^2+18x-4=0 solve for x
Click here to see answer by mananth(16946)

Question 330251: how do i get the answer to
1)X 2power - 2x - 13 =0
2) 4x 2power - 4x + 3 =0
3) x 2power + 12x - 64 = 0
4) 2x 2power - 3x - 5 = 0
please help me out

Click here to see answer by solver91311(24713)

Question 330251: how do i get the answer to
1)X 2power - 2x - 13 =0
2) 4x 2power - 4x + 3 =0
3) x 2power + 12x - 64 = 0
4) 2x 2power - 3x - 5 = 0
please help me out

Click here to see answer by Fombitz(32388)

Question 330255: I need help please. I need to solve this problem. (x+10)(x-3)(x+5)>0 Choose correct choice. A. The solution set is {x/what?} (need to fill in for x) or B. The solution is all real numbers. or C. There is no solution. Thank you.
Click here to see answer by solver91311(24713)

Question 330274: Model A takes 2 hours to assemble.
Model B takes 3 hours to assemble.
Model A costs $25 to make per bike.
Model B costs $30 to make per bike.
If your company has a total of 34 hours and $350 available per day for these two models, how many of each model can be made in a day?
� Solve the equations for the different bicycle models that can be made daily with the desired technique learned (graphing, substitution, elimination, and matrix).
� Explain how to check your solution for both equations.

Click here to see answer by Fombitz(32388)

Question 330278: Solve. 10x^4 -29x^2 +10=0. The solution is x=? Simplify and use radicals as needed. Rationalize all denominatiors. Use comma to seprarate answer.
Click here to see answer by Fombitz(32388)

Question 330307: how do i solve:
x^2-7x+3=0
Click here to see answer by jim_thompson5910(35256)

Question 330287: Jack usually mows his lawn in 4 hours. Marilyn can mow the same lawn in 7 hours. How much time would it take for them to mow the lawn together? It would take tham how many hours of they worked together?
Click here to see answer by scott8148(6628)

Question 330263: Use the FOIL method to find the product. (6x^2-4)(x^8-9).
Click here to see answer by ankor@dixie-net.com(22740)

Question 330408: use the discrimant to determine the kinds of numbers that will satisfy the equation x2=3x-4. do not solve.
Click here to see answer by mananth(16946)

Question 330417: begin with ax2+bx+c=0 and derive the quadractic formula by completing the square
Click here to see answer by jim_thompson5910(35256)

Question 330433: Please help with this problem. The book says find all real and imaginary solutions by method of choice.

2x - 5 = √7x+7
Click here to see answer by Earlsdon(6294)

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