Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 106168: Can someone help me solve this quadtratic problem:
2x2+7x+5
4+7x+5
9+7x
Click here to see answer by shauna broeske(4)

Question 106169: Can someone help me solve this quadtratic problem:
2x^2+7x+5
Click here to see answer by stanbon(75887)

Question 106167: I am very confused can someone help me with ths quadratic problem:
x^2+x-6
Thanks alot
Click here to see answer by stanbon(75887)

Question 106158: another problem..
If a bus traveled 10 km/h faster, it would take 2h less time to make a 315km trip. What is its speed?
Thanks!
Click here to see answer by HyperBrain(694)

Question 106156: When a car reduces it speed by 18km/h, its wheels is 200cm in circumference, take 1 sec longer to make revolutions. What was the car's original speed?
quadratic equation for this ??

Click here to see answer by ankor@dixie-net.com(22740)

Question 106309: Please help!
This is the problem given from a worksheet:
A tennis ball is hit upward from a height of 1m and leaves the racket with an initial velocity of 10m/s.
Determine the equation that shows the ball's height as a function of time.
All I need to know is what the formula is for this question. I forgot my notes and cannot remember the formula.
Thank you!
Click here to see answer by ankor@dixie-net.com(22740)

Question 106315: HELP!!!! Solve for x in terms of a????
1. 6A^2X^2 - 11AX = 10 ????????????
Click here to see answer by Fombitz(32388)

Question 106337: Please help me solve this problem I got this problem from my textbook:
Quadratic Equations
Write the equation of the axis of symmetry, and find the coordinates of the vertex of the graph of each function. Identify the vertex as a maximum or minimum. Then graph the function.
y=x^2+2x
I understand the graphing part but when i did this problem i somehow got the line to be a crooked line instead of a parabola.

Click here to see answer by stanbon(75887)

Question 106314: Solve for x in terms of a????
4a^2x^2 + 8ax + 3 = 0???
Click here to see answer by stanbon(75887)

Question 106384: A picture frame measures 12cm by 20cm. 160cm^2 of the picture shows inside the frame. What is the width of the frame? And what is the solution? thanx
Click here to see answer by scott8148(6628)

Question 106313: Solve for x in terms of a:
1.) 3x^2+ax=a^2
Click here to see answer by ptaylor(2198)

Question 106506: word problem for quadratic equation
Brendan buys a block of shares of Laser Technology for $1875. When the share price increases by $4 per share, he sells all but 15 of them for $1740. How many shares did he buy?
can anyone set-up the equation for this?? thanks for your help...

Click here to see answer by edjones(8007)

Question 106502: The edges of three cubes are consecutive odd integers. If the cubes are stacked as shown the total exposed surface area is 381 cm2. Find the lengths of the sides of the cubes.
i need an equation for this pls..
Click here to see answer by ankor@dixie-net.com(22740)

Question 106507: Car A leaves Toronto for Montreal, 500km away, at an average speed of 80km/h. Car B leaves Montreal for Toronto on the same highway 2h later at 100 km/h. How far are they from Toronto when they pass?
equation for this please.. tnx in advance. =D
Click here to see answer by stanbon(75887)

Question 106551: Two-way radio range:
Two surveyors with two-way radios leave the same point at 9:00AM, one walking due south at 4 mi/hr and the other due west at 3 mi/hr. How long can they communicate with one another if each radio has a maximum range of 2 miles?
Click here to see answer by stanbon(75887)

Question 106572: This is an online study course.
Some students planned for a get-together. The budget for food was $500. Five of the students failed to come because of the distance and therefore the cost of food for each member increased by $5. How many students attended the get-together?
500/x + 5 = 500/(x-5)

Click here to see answer by stanbon(75887)

Question 106505: Antonella bought some calculators for a total of $240. She kept one for herself and sold the rest for $300 making a profit of $5 on each calculator. How many calculators did she buy?
an equation for this pls?? anyone??
Click here to see answer by scott8148(6628)

Question 106504: Over a distance of 120 km, the average speed of a train is 40km/h faster than that of a car. If the train covers the distance in 30min less time, find its average speed.
an equation for this pls?
thanks =D
Click here to see answer by scott8148(6628)

Question 106726: z^2+5z-14=0
Click here to see answer by jim_thompson5910(35256)

Question 106725: z^2+5z-14=0
Click here to see answer by jim_thompson5910(35256)

Question 106709: can u please help me solve this problem: two positive integers are in the ratio 1:3. if their sum is added to their product the result is 224. find the integers.
Click here to see answer by scott8148(6628)

Question 106792: Could you please take the time to help me solve this problem: What is the sum of the roots of the quadratic equation: a x2 + b x + c = 0, where a, b, and c are all non-zero real constants.
Thanks for your help.
Click here to see answer by Earlsdon(6294)

Question 106819: Hello, I was asked to perform this operation and I cannot find a similar example in my book. It looks like it should be easy, but I can't get started.

__4__ - _15_ When I previewed my question it doesn't look like it should
2x-4 5x It should be 4/2x-4-15/5x

Thank you for your help. Paul
Click here to see answer by edjones(8007)

Question 106823: Hello, this is a tricky one.Find the domain of this function
f(x) = SR of 1/2x-1
(square root)
Where do I start? Thank you, Paul
Click here to see answer by edjones(8007)

Question 106822: Hello, I was given this question and I have no idea what it means.
Find all real solutions (m)^-4/3 = 16 ??????? Could you please help me with this one. Thank you, Paul
Click here to see answer by edjones(8007)

Question 106820: Hello, I don't know how to display the square root sign so I will abreviate with SR. Perform the operation and simplify SR of 12 - SR of 50 + SR of 72. Thank you, Paul
Click here to see answer by edjones(8007)

Question 106817: Hello, could you please help me with this factoring equation?
x^3-9x+x^2-9 I am supposed to factor this completely. I tried many different combinations, none of which work. How do I figure this one out? Thank you, Paul
Click here to see answer by ankor@dixie-net.com(22740)

Question 106861: I did what I was supposed to do on this equation, but my answers did not check out. 2/x+5/2x=1. How do you solve this problem? Thank you.
Click here to see answer by checkley75(3666)

Question 106860: solving quadratic equations by extracting square roots.
(x-2/5)^2=49/25 is the problem i am having trouble with.
i did try to do it. i can't show the root sign to you with my computer
to show what i did.

Click here to see answer by Earlsdon(6294)

Question 106948: a 48 cm wire is to be cut into two pieces. One piece must be 10 cm longer than the shorter piece. How long should each piece be?
Click here to see answer by cheesey(22)

Question 106960: solve for r: A="pie"r"squared"
Click here to see answer by cheesey(22)

Question 106914: I don't know what this one is asking.. sqrt(3a^7) The question says simplify, simplify what? Thank you, Rita
Click here to see answer by checkley75(3666)

Question 107014: When I get to Factoring 40 I can not get anything to add to get 22. How would I work the problem out?
Click here to see answer by checkley75(3666)

Question 106934: find the quadratic function, whose graph passes through the points (1,3),(-2,18) and (3,13)
Click here to see answer by scott8148(6628)

Question 106963: please help me answer this question: use the axis of symmetry formula to find the vertex of f(x)=3x^2-4x+1.
Click here to see answer by scott8148(6628)

Question 107031: Hi, please help me answer this problem:
The height in feet of a golf ball hit from an elevated tee box is given by h(t)=-16t^2+60t=25 where t represents the time in seconds the ball is in flight.
a.) Determine the number of seconds before the golf ball hits the ground at a height level of 0 feet.
b.) Determine the time interval that the ball is above 25 feet.
Thanks.
Click here to see answer by scott8148(6628)

Question 107035: Hey,
Please help me solve this problem:
A square mat used for athletic exercises has a uniform red border on all four sides. The rest of the mat is blue. The width of the blue square is three-fourths the width of the entire square. If the area colored red is 28 m^2, determine the length of each side of the mat.
Thanks!
Click here to see answer by scott8148(6628)

Question 107050: i need help solving these quadratic equations using the quadratic formula.
2x^2 - 5x = 3
Click here to see answer by jim_thompson5910(35256)

Question 107049: i need help solving these quadratic equations using the quadratic formula.
2x^2 - 5x = 3
3x^2 - 2x + 1 = 0
i am trying to solve for x
2(x-5)^2 = 3
and this queston also i have been trying to figure these out fo an hour.
x^2 + 4x + 4 = 7

Click here to see answer by edjones(8007)

Question 107036: Hi,
Please help me solve this problem:
The formula for computing the amount A of an investment of principal P invested at interest rate r for 1 year and compounded semiannually is A=P(1+r/2)^2. Approximately what interest rate is necessary for $1,000 to grow to $1,075 in 1 year if the interest is compounded semiannually?
Thank you!
Click here to see answer by edjones(8007)

Question 107047: i need help solving these quadratic equations using the quadratic formula.
2x^2 - 5x = 3
3x^2 - 2x + 1 = 0
i am trying to solve for x
2(x-5)^2 = 3
and this queston also i have been trying to figure these out fo an hour.
x^2 + 4x + 4 = 7
Click here to see answer by Annabelle1(69)

Question 79298: Solve
x^2 - 5x = 14
Click here to see answer by HyperBrain(694)

Question 107033: Hi, please help me answer this question:
The president of a company producing water pumps has gathered data suggesting that the average cost in dollars producing x units per hour of a new style of pump will be C(x)=x^2-22x+166. Determine the number of pumps per hour to produce to keep the average cost below $75 per pump.
Thanks!
Click here to see answer by Annabelle1(69)

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