Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 199366: Linear Systems
9. What volumes of 60% hydrochloric acid solution and 30% hydrochloric acid solution must be mixed to make 125 mL of 36% hydrochloric acid solution?

thank you very much!!!!
Click here to see answer by checkley77(12844)

Question 199362: Linear Systems
5.Explain why the following linear system has no solution.
y-2x=1
y=2x+3

Thankssssssssss!!!!!!!!!
Click here to see answer by checkley77(12844)

Question 199501: find an equation for which -3 and 4 are solutions

Click here to see answer by checkley77(12844)

Question 199506: 1) what type of solution do you get for a quadratic equation where D<0? give the reasons for your answer. Also provide an example of such a quadratic equation and find the solution of the equation.
2) create a real-life situation that fits into the equation(x+3)(x-5)=0 and express the situation as the same equation.
Click here to see answer by solver91311(24713)

Question 199444: A business invests $8,000 in a savings account for two years. At the beginning of the second year, an additional $2,500 is invested. At the end of the second year, the account balance is $11,445. What was the annual interest rate? Can you help me with this one?
Click here to see answer by ankor@dixie-net.com(22740)

Question 199535: hudson river flows at a rate of 5 miles per hour. a patrol boat travels 40miles upriver, and returns in a total time of 6 hours. what is the speed of the boat in still water?
Click here to see answer by jim_thompson5910(35256)

Question 199551: p2-4p=21
Click here to see answer by edjones(8007)

Question 199552: can you please graph p2-4p=21
Click here to see answer by stanbon(75887)

Question 199573: Can anyone help me with this one? It requires me to determine the number of solutions and classify the type of solutions for each of the following equations? Justify the answer please?
x^2-4x-77=0
Click here to see answer by jim_thompson5910(35256)

Question 199572: Can anyone help me with this one? It requires me to determine the number of solutions and classify the type of solutions for each of the following equations? Justify the answer please?
2x^2-3x+7=0
Click here to see answer by jim_thompson5910(35256)

Question 199571: Can anyone help me with this one? It requires me to determine the number of solutions and classify the type of solutions for each of the following equations? Justify the answer please?
x^2-8x+16=0
Click here to see answer by jim_thompson5910(35256)

Question 199563: 3. Steve traveled 150 miles at a certain speed. Had he gone 20mph faster, the trip would have taken 2 hours less. Find the speed of his vehicle.
i think it is 30mph but I cannot figure out the equation
Click here to see answer by jim_thompson5910(35256)

Question 199565: A hose can fill a swimming pool in 18 hours. Another hose needs 3 more hours to fill the pool than the two hoses combined. How long would it take the second hose to fill the pool?
Click here to see answer by edjones(8007)

Question 199473: what is a simple way of remebering the quadradic formula?
Click here to see answer by rfer(16322)

Question 199600: I'm not to sure if this is the right section for my question but here goes:
I'm working on factorizing quadratic trinomials and here is a question I need help with factorizing this expression.
1) 20x^2-44x+21
Click here to see answer by vleith(2983)

Question 199598: I'm not to sure if this is the right section for my question but here goes:
I'm working on factorizing using the difference of two squares rule and I need help factorizing this expression.
1) (5x-4)^2 - (x-7)^2
Click here to see answer by nerdybill(7384)

Question 195080: x^2 + 3x - 18 = 0
Use the following quadratic equation to complete parts a and b below. You must show all work.
a. Solve by factoring.
b. Solve using the quadratic formula
Click here to see answer by awang1996(50)

Question 199637: what is i-100? i to the -100 power?
Click here to see answer by Alan3354(69443)

Question 199679: please help me solve and graph this equation: 5x^2-20x-60=0
Click here to see answer by Alan3354(69443)

Question 199679: please help me solve and graph this equation: 5x^2-20x-60=0
Click here to see answer by jim_thompson5910(35256)

Question 199645: how do I solve these problems
1. 6x^2+7x=5

2.12+5x-2x^2=0
3.5x^2+16x-12=0
Click here to see answer by jim_thompson5910(35256)

Question 199640: the solution of (6x+7)2 =10 x=
squared
Click here to see answer by jim_thompson5910(35256)

Question 199699: A rectangular building that measures 100m by 80m is to be surrounded by a lawn of uniform width. The area of the lawn must be equal the area of the building. Find the width of the lawn, to the nearest tenth of a metre.
Thanks soo much.. exam tomorrow =(
Click here to see answer by scott8148(6628)

Question 199793: solve the following equation using the quadratic formula and give answer in standard form 3x^2=-4x-20 (its been so long since ive had to use this formula that I almost forgot it) Thanks for your help in advance!
Click here to see answer by solver91311(24713)

Question 199794: I am trying to come up with a quadratic equation that will have 2 solutions:
0 & -2.
I'm a first year student, who has been out of school for 30 years, and I'm having a hard time with this. This is a bonus question for my next test, and I need all the help I can get! Can you please help me?
Thank you
Deb
Click here to see answer by jim_thompson5910(35256)

Question 199801:
Click here to see answer by Edwin McCravy(20054)

Question 199813: This is a proportion problem I am having trouble with
x/4=(x+8)/x
Thank you for your help
Click here to see answer by edjones(8007)

Question 199813: This is a proportion problem I am having trouble with
x/4=(x+8)/x
Thank you for your help
Click here to see answer by solver91311(24713)

Question 199813: This is a proportion problem I am having trouble with
x/4=(x+8)/x
Thank you for your help
Click here to see answer by Mathtut(3670)

Question 199440: Can you give an example of a quadratic equation for D<0 (negative)?
Click here to see answer by Mathtut(3670)

Question 199439: Can you give me an example of a quadratic equation for D>0?
Click here to see answer by Mathtut(3670)

Question 199376: Analytic Geometry
20.Find the diameter and the area of the circle defined by x^2+y^2=64
Thank you...
Click here to see answer by Mathtut(3670)

Question 199832: how to get an equation by itself when theres more than one variable on one side?
Click here to see answer by jerrybassmasta(14)

Question 199901: 2x+6x+1=0
Click here to see answer by rfer(16322)

Question 199940: A student opens a book to two facing pages. The product of the page numbers is 1806, find the pages numbers.
First page__________
Second page_________
How do I work this problem?
Click here to see answer by Alan3354(69443)

Question 199938: The width of a rectangle is 1 ft less than the length. The area is 2ft squared. Find the width and lenght.
Click here to see answer by RAY100(1637)

Question 199939: A farmer decides to enclose a rectangle garden using one side of the barn as a side to the rectangle. What is the maximum area that the farmer can enclose with 100 ft of fence? What should the deminsons of the garden be to give this area?
Maximum area that the farmer can enclose with 100 ft of fence__________sq.ft.
Deminsons of the garden to give this area is 50 ft by __________ft.
Click here to see answer by RAY100(1637)

Question 199973: A parabolic arch has a span of 120ft and a maximum height of 25ft. Choose a suitable rectangular system to find the equation of the parabola. Then calculate the height of the arch 10, 20, and 40 ft from the center. Provide a sketch representing the situation and be sure it is clearly labeled with coordinates.
Click here to see answer by ankor@dixie-net.com(22740)

Question 199979: A tight end can run the 100 yard dash in 12 seconds. A defensive back can do it in 10 seconds. The tight end catches a pass at his own 20 yard line with the defensive back at the 15 yard line. If no other players are near by at what yard line will the defensive back catch up to the tight end?
Click here to see answer by ankor@dixie-net.com(22740)

Question 200013: Solve 6x+13 = 2x+7 what is x
and y/5 - 2 = 4
Click here to see answer by edjones(8007)

Question 200023: Hi. I have to find a quadratic equation with integral coefficients with roots 2i and -2i. I know I have to work backwards but I dont know how to figure this out because of i. Thank You!
Click here to see answer by Alan3354(69443)

Question 200025: x^2+14x-31=0
Click here to see answer by jim_thompson5910(35256)

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