Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 505556: For which value of x is the following algebraic equation true?
x2-4x+4=0
Click here to see answer by edjones(8007)

Question 505703: 20!/3!(20-3)!
Click here to see answer by jim_thompson5910(35256)

Question 506564: How do you solve s^2+3s-54=0
Click here to see answer by Gogonati(855)

Question 506659: Complete the square for the equation.
x^2 + 11/3
Click here to see answer by stanbon(75887)

Question 506641: Determine whether (2, -3) is a solution to the following system of equations. Be sure to explain your answer.
3x - 2y = 12
2x + 3y = -5.... I am not sure how to do this, I tried graphing it and seeing what i could do from there but im just not getting it!..
AND...
When solving a system of equations using the substitution menthod, you obtain the following result: 8 = 9. This result gives you some information about the solution.
a) How many solutions does the system have?
b) What would the graph of the system look like?
I just do not even know how to do this one, I dont know where to even start!HELP!! ...

There are the three possible outcomes for a system of equations. What does each LOOK like? How many solutions does each one have?

Click here to see answer by jennywecas(28)

Question 506761: Please help me solve this equation

Click here to see answer by richard1234(7193)

Question 506810: Suppose you are solving a system of equations where one equation is y=|x| and the graph of the other equation is a line. What are the possible number of solutions? Select all that apply.
Click here to see answer by Edwin McCravy(20054)

Question 506692: I am having trouble with this problem. Could someone please help.
sqrt18+sqrt24 divided by sqrt6 Show your steps.
Click here to see answer by ankor@dixie-net.com(22740)

Question 507193: I am having problems with Algebra/Trigonometry sticking in my brain. I did this problem 3x+4= -8
-4= 4
_____________________
x = -4
What I don't understand is what happens to the 3???
My next problem is 2(x+7)=5x+14 I don't know where to start??

Click here to see answer by Edwin McCravy(20054)

Question 506871: solve the equation: (w+2)^2=2w^2+10w+13 for w
if there is more than one solution, seperate them with commas
Click here to see answer by jim_thompson5910(35256)

Question 508207: 3y^2/3+21y^1/3+30=0 Whats the solution to this? an can you show step by step so i'll know how to solve next time?
Click here to see answer by stanbon(75887)

Question 508462: Find two consecutive positive odd numbers given that difference between their reciprocals is 2\63
Click here to see answer by Alan3354(69443)

Question 508543: Find a so that the graph of f(x) = loga(x) contains the point (1/3, -6). Give your answer correct to 2 decimal places.
Click here to see answer by swincher4391(1107)

Question 508660: Factor the following equation completely. Factor out the GCF first.
4x^2-6x-4
Click here to see answer by stanbon(75887)

Question 508789: A polynomial expression is given by 3(t-2)^2+11(t-2)+6. What are its factors? I tried to solve it and I come to 3t^2-t+6 and I can't factor it.
Click here to see answer by scott8148(6628)

Question 508808: An enclosed area is designed using one existing wall, and 72m of fence material. What is the maximum possible area of this enclosure? So I did y=72-2x, hence A=(x)(72-2x). Then, I factored it out to A=72x-2x^2. I graphed it but i got 648 as the maximum area and its wrong.
Click here to see answer by scott8148(6628)

Question 508847: pls answer my word problems..............
two pipes together can fill a large tank in 2 hours. one of the pipes, used alone, takes 3 hours longer than the other to fill the tank. how long would each pipe take to fill the tank alone.
FASTER PIPE: RATE:1/x IN 2 HRS.
SLOWER PIPE: RATE:????? IN 2 hrs.
Click here to see answer by oberobic(2304)

Question 509152: What is the simplified version of 9 over ((x+1 over x-1)-1)
and the domain
Thanks
Click here to see answer by swincher4391(1107)

Question 509154: What is the simplified version of 9 over ((x+1 over x-1)-1)
the last -1 is in the denominator
Thanks
Click here to see answer by swincher4391(1107)

Question 509170: Solve by factoring:
2a^2-3a=-5
Guys I really need help quickly please help.

Click here to see answer by Alan3354(69443)

Question 509170: Solve by factoring:
2a^2-3a=-5
Guys I really need help quickly please help.

Click here to see answer by swincher4391(1107)

Question 509175: 26.Solve.
15t^2 + 7t = 2

Solve:#14
Rowing. Abby rows 10 km upstream and 10 km back in a total time of 3 hr. The speed of the river is 5 km/h. Find Abby�s speed in still water.

My math friends please help me with these I am on a deadline, thank you.I really am desperate here.
Click here to see answer by Alan3354(69443)

Question 509230: Solve the equation 4x^2 +12x=0
f(x) =4x^2+12x=0 where c is a constant
And part b
Given that f(x) =0 has equal roots find value of c and hence solve f(x) =0
Click here to see answer by solver91311(24713)

Question 509261: 1. In solving the equation (x � 1)(x � 2) = 30, Eric stated that the solution would be
x � 1 = 30 => x = 31
or
(x � 2) = 30 => x = 32
However, at least one of these solutions fails to work when substituted back into the original equation. Why is that? Please help Eric to understand better; solve the problem yourself, and explain your reasoning.

MATH GENIUS I NEED HELP I AM LOST AND ON A DEADLINE!!
Click here to see answer by richard1234(7193)

Question 509273: 5. Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.
4x + 8y = 16
-2x + 5y = 55

please help!
Click here to see answer by Alan3354(69443)

Question 509384: please someone help me to answer this problem, I have no idea how to do this question:4m^2+7m=0
i have no idea where to begin please help asap thanks
Click here to see answer by nerdybill(7384)

Question 509391: plese help me anwer this question i willput down the answer i originally recived but need to know if it is right or not if it is not please help me to get it right....x^2+11=6x
it has to be facotred i think or solved this is what i got so far
(x-3)^2+2=0
x^2-6x+11=0
-1/2(x-3)^2=1 is this right or not...i am not sure of it!
Click here to see answer by Alan3354(69443)

Question 509441: a rectangle has a perimeter of 400 feet... express its area in terms of one of its sides,x
Click here to see answer by richard1234(7193)

Question 510297: 11. Use polynomial long division to divide
-12x^3 � 8x^2 + 17x � 5
by
4x^2 � 4x + 1
MATH WORLD PLEASE HELP I AM ON A DEADLINE!!

Click here to see answer by rfer(16322)

Question 510301: ALMOST FINISHED PLEASE PLEASE HELP ME!
12. Multiply
-5x + 4
by
4x^2 + x
Click here to see answer by rfer(16322)

Question 510334: I need help in figuring out how to set this problem up and solving same:
Five divided by the sum of a number and 7, minus the quotient of 3 and the difference of the number and 7 is equal to 6 times the reciprocal of the difference of the number squared and 49. What is the number?
Thank You To Any and All ...
Click here to see answer by edjones(8007)

Question 510341: 7. Express in terms of i.
2√-36

Click here to see answer by swincher4391(1107)

Question 510597: x2-19x+7=-7x-4
Click here to see answer by lwsshak3(11628)

Question 510663: 7(3X+6)=11-(X+2)
Click here to see answer by faceoff57(108)

Question 510959: Find b2 � 4ac and the number of real solutions for the given equation.
16-24+9x^2=0
Click here to see answer by stanbon(75887)

Question 511153: To determine the number
of ounces of fluid that a person should drink in a
day, divide his or her weight in pounds by 2 and then
add 0.4 ounce for every minute of exercise.
(a) Write a function that gives the fluid requirements
for a person weighing 150 pounds and exercising
x minutes a day.
(b) If a 150-pound runner needs 89 ounces of fluid
each day, determine the runner�s daily minutes of
exercise.

Click here to see answer by John10(297)

Question 511256: Solve the equation after making an appropriate substitution:
x^4-11x^2+28=0

Click here to see answer by Alan3354(69443)

Question 511416: I'm stuck on the below:
t = u + uqp ;solve for u
I divide both sides by qp but cant figure out what to do about the u + u...
Please assist
Click here to see answer by Alan3354(69443)

Question 511584: suppose the ball was 2.74 feet above ground when Josh hit it, and that it reached a maximum height of approximately 116.3 feet when it was approximately 215.3 feet away from where he hit the ball. The ball lands after traveling a ground distance of approximately 433.1 feet. find the other root?
Click here to see answer by stanbon(75887)

Question 511411: 1) Solve the following quadratic equation by factoring:
a) x2 − 6x −16 = 0

b) Solve the quadratic equation 6x2 + 3x � 18 = 0 using the quadratic formula.
Read the information in the assignment list to learn more about how to type math
symbols, such as the square root.

c) Compute the discriminant of the quadratic equation and then
write a brief sentence describing the number and type of solutions for the
Click here to see answer by richard1234(7193)

Question 511668: please help me.......
two school buildings are 7 inches apart on a city map. if the map scale is 4 inches to 3 miles, find the actual distance between the buildings.
Click here to see answer by bucky(2189)

Question 511746: the sum of two numbers is 16 and the product is 63. what is the two numbers?
Click here to see answer by Maths68(1474)

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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, 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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