Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 675658: A local Dunkin Donuts sells their original blend of Dunkin DOnuts ground coffee for $8.99 per pound. On average, the local Dunkin Donuts sells about 48 one-pound bags a day. After doing some market research, they found that for each $0.50 increase in the price that they will lose one costumer per day. What price should they set the coffee at in order to maximize their profit? What price above $8.99 will cause them to lose money? Sketch a graph to support all of your results.
Click here to see answer by jsmallt9(3758)

Question 675894: 1/2x-4=3x+1
Click here to see answer by ReadingBoosters(3246)

Question 675921: Solve equation by using the square root property
(x-3)^2-19=0
Click here to see answer by ReadingBoosters(3246)

Question 675921: Solve equation by using the square root property
(x-3)^2-19=0
Click here to see answer by Alan3354(69443)

Question 675556: Write a quadratic equation having the given solutions: -7, 8
Click here to see answer by ReadingBoosters(3246)

Question 675969: 1-
2-
3- x^+3x=0
4-
5-
Click here to see answer by khv_maths(12)

Question 676098: hello sir ,
could u plz tell me how to solve this:
√3xsq+2√x-2√3=0
sq means the 2 made on top because i couldnt make it so i wrote it and sir it is a quadratic equation in which we have to find the discriminant i ve tried and tried but i couldnt understand how to remove the roots so could u plz explain me how to remove the roots and get the discriminant ...
thank you
Click here to see answer by Alan3354(69443)

Question 676196: I(t) = -145.86t2 + 3169.342t - 15145.2 where I(t) represents the net income in millions of dollars
The net income for Pell Corporation can be modeled by I(t) = -145.86t2 + 3169.342t - 15145.2 where I(t) represents the net income in millions of dollars t years since 1990.
Using this model, estimate the net income from Pell in 2000.
(2000-1990)= I(10)= -145.86(10)*2+3169.342(10) -15145.2=MILLION DOLLARS.
.Using this model, estimate the net income from Pell in 2014.
When did Pell�s net income reach 1500 million dollars?

Click here to see answer by solver91311(24713)

Question 676408: solve the equation
2r^-3r-2=0
Click here to see answer by Alan3354(69443)

Question 676723: How do I write a quadratic equation with the given roots (2/3) and -4 in the form of ax^2+bx+c=0
Click here to see answer by ankor@dixie-net.com(22740)

Question 676747: Janet threw a basketball. The equation h(t)= -16t^2 +5t+5 describes the height h of the ball in t seconds after she threw it.
How many seconds passed before the ball hit the ground?
How long did it take for the ball to reach its maximum height?
Click here to see answer by ewatrrr(24785)

Question 676832: How do I solve this Quadratic equation: 3+(x-5)^2=19
Click here to see answer by lynnlo(4176)

Question 676832: How do I solve this Quadratic equation: 3+(x-5)^2=19
Click here to see answer by ReadingBoosters(3246)

Question 676819: 2(3-4x)-5(2x+3)=x-17

Click here to see answer by lynnlo(4176)

Question 676996: 6(3-2w)-14=14
Click here to see answer by ReadingBoosters(3246)

Question 677089: use a quadratic equation to find two real numbers that satisfy each situation, or show that no such numbers exist
their sum is 12, and their product is20
Click here to see answer by stanbon(75887)

Question 677334: Find the exact solution of x^2-2x-8=0
Click here to see answer by jim_thompson5910(35256)

Question 677342: How to solve 9x^2 = 25 by finding square roots?
Click here to see answer by jim_thompson5910(35256)

Question 677389: Write the quadratic equation whose roots are -2 and 1 whose leading coefficient is 2.
Click here to see answer by ReadingBoosters(3246)

Question 677461: How do I graph the quadratic equation x^2+6x+6=0?
Click here to see answer by ReadingBoosters(3246)

Question 677461: How do I graph the quadratic equation x^2+6x+6=0?
Click here to see answer by josmiceli(19441)

Question 677487: How do you graph the quadratic equation x^2+4x+2=0?
Click here to see answer by ReadingBoosters(3246)

Question 677510: -5(n-3)^2=10
Click here to see answer by edjones(8007)

Question 677709: it says," Solve using the quadratic formula."
x^2+5x+6=0
8x^2-10x-12=0
Click here to see answer by ReadingBoosters(3246)

Question 677696: find the roots of g(x)=6-(x-2)^2 and graph the function

Click here to see answer by ewatrrr(24785)

Question 677751: I need help finding the vertex and determining the min or max of f(x) = -3x2 + 9x + 2

Click here to see answer by jim_thompson5910(35256)

Question 677837: From the following list of equations, decide which are quadratic and explain your choices.
a.
b.
c.
Click here to see answer by Alan3354(69443)

Question 677976: Write a Quadratic Equation given these solutions:
x = 1/3 and x = 1/4
how do I solve that?? and also for
x= -1/2 and x = -2/3

Click here to see answer by swincher4391(1107)

Question 677957: A quadratic expression can be factored so that (x - 12)(x + 17) = 0. What are the solutions to the equation?
Click here to see answer by ReadingBoosters(3246)

Question 678026: Is a=2 a solution to the equation a+b=0? Explain
Click here to see answer by ReadingBoosters(3246)

Question 678154: How do you write a quadratic equation in the form ax^2 + bx + c = 0 such that c = 4 and the equation has the given solutions of -4 and 3?
Click here to see answer by nerdybill(7384)

Question 678117: Solve fo x.
X^4+61x^2+900=0

Click here to see answer by htmentor(1343)

Question 678198: Hello, I need help with a quadratic equation. I get stuck at the part where I need to simplify inside the radical. The problem I am currently on is:
Thank you for your help.
P.S. I need to leave the answer in radical form.
Click here to see answer by nerdybill(7384)

Question 678226: Write a quadratic function that fits each set of points.
(-1,-12), (1,0), and (2,9)
Click here to see answer by lynnlo(4176)

Question 678235: Write the quadratic function in the form g(x)= a(x-h)^2 + k
g(x)= 2x^2 + 12x + 16
Then, give the vertex of its graph.
Thanks so much for your help
Click here to see answer by MathLover1(20849)

Question 678237: Write a quadratic function that fits each set of points.
(1,2), (2,-1), and (5,2)
Please, and Thank You :) This is also my last question as I was able to do the rest of them. :)
Click here to see answer by ankor@dixie-net.com(22740)

Question 677724: how would you solve this problem: x^3+x^2-225x-225=0
Click here to see answer by pmatei(79)

Question 678301: can you please help me with this?
25c^2 + 5c - 42

Thanks.
Click here to see answer by jim_thompson5910(35256)

Question 678301: can you please help me with this?
25c^2 + 5c - 42

Thanks.
Click here to see answer by MathLover1(20849)

Question 678293: find the equation of the parabola with vertex
a) ( 2,-12) passing through (0,0)
b) (2,6) passing through (0,-6)
Click here to see answer by MathLover1(20849)

Question 678403: Solve by completing the solve
6z^2=z+2
Click here to see answer by santukeerti(5)

Question 678402: Solve the completing the square
6z^2=z+2
Click here to see answer by ReadingBoosters(3246)

Question 678402: Solve the completing the square
6z^2=z+2
Click here to see answer by mananth(16946)

Question 678401: solve
r+s . r2-2rs+s2
r2-s2 r2-rs
Click here to see answer by ReadingBoosters(3246)

Question 678396: What is
r+s . r2-2rs+s2
r2-s2 r2-rs
Click here to see answer by ReadingBoosters(3246)

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