Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 206622: Hi, Im a little confused with this problem. I tried to figure it out, but do not know what would be the right answer.
Solve by the elimination method.
5x+6y=5
10x+12y=10
what is the solution of the system?
( I came up with - The solution is (10,10).
but could the answer be that there are infinetely many solutions, or that there is no solution. can you please help. thanks

Click here to see answer by Theo(13342) About Me 

Question 206628: what would be the correct graph of the equation C=20t + 40
Click here to see answer by Theo(13342) About Me 

Question 206626: I just wanted to make sure that I solved these correctly
5/8X + 1/16X= 5/16 + X The solution is X= 1/32
also,
Use the distributive property to help you solve the equation
3(w-5)=6 W=___ ( I came up with W= 7)

Solve using the multiplication principle.
11X = -99 the solutionis X=-9 (Is this correct)
Thank you

Click here to see answer by jim_thompson5910(35256) About Me 
Question 206626: I just wanted to make sure that I solved these correctly
5/8X + 1/16X= 5/16 + X The solution is X= 1/32
also,
Use the distributive property to help you solve the equation
3(w-5)=6 W=___ ( I came up with W= 7)

Solve using the multiplication principle.
11X = -99 the solutionis X=-9 (Is this correct)
Thank you

Click here to see answer by Theo(13342) About Me 

Question 206642: Please help me solve:
%28t-5%29%5E2=2%285-t%29
Thank you.

Click here to see answer by jim_thompson5910(35256) About Me 

Question 206712: Your company uses the quadratic model y = -4.5x^2 + 150x to represent the average number of new customers who will be signed on (x) weeks after the release of your new service. How many new customers can you expect to gain in week 28?
This equation looks linear, but it says that it is quadratic, so I am not sure what do I start with. Thanks for your help on this.

Click here to see answer by nerdybill(7384) About Me 

Question 206715: solve for x by splitting the middle term.
10x^2 +3bx + a^2 - 7ax - b^2

Click here to see answer by edjones(8007) About Me 

Question 206727: (2x+5)(3x-4)=0
Click here to see answer by vleith(2983) About Me 

Question 206737: 3x(2x+1)=18
Click here to see answer by nerdybill(7384) About Me 
Question 206737: 3x(2x+1)=18
Click here to see answer by mesut bora(1) About Me 

Question 206733: x3(squared)-9x=0
Click here to see answer by profemmanuel2q@yahoo.com(15) About Me 

Question 206728: x2(squared)=x
Click here to see answer by stanbon(75887) About Me 

Question 206761: solve using the quadratic formula. 5x^2-3x-3=0
Click here to see answer by jim_thompson5910(35256) About Me 

Question 206762: Solve 3(x-2)^2=48
Click here to see answer by jim_thompson5910(35256) About Me 

Question 206766: Hi, I wanted to make sure that I have the correct solutions for this problem.
Find the indicated outputs for f(x)=5x to the second power -4x
f(0)= ___ ( i put 0)
f(-1)= ____ ( I put 9)
f(2)= _____ ( I put 12)
Are these correct? thanks

Click here to see answer by mickclns(59) About Me 

Question 206768: I wanted to make sure that I have the correct answer, can you check this one please.
solve the following system of equations
x+4y=8 (1)
x=4-4y (2)
What is the solution of the system?
I put the solution is (1,2)ordered pair. Is this correct?

Click here to see answer by Alan3354(69443) About Me 

Question 206786: I am having a problem answering this problem,Please help.
Barn painting. Melanie can paint a certain barn by herself
in x days. Her helper Melissa can paint the same barn by
herself in 2x days. Write a rational expression for the fraction
of the barn that they complete in one day by working
together. Evaluate the expression for x = 5.

Click here to see answer by Alan3354(69443) About Me 

Question 206785: I am having a problem answering this problem,Please help.
Driving marathon. Felix drove 800 miles in x hours on
Monday.
a) Write a rational expression for his average speed.
b) On Tuesday he drove for 6 hours at the same average
speed. Write a rational expression for his distance on
Tuesday.

Click here to see answer by vleith(2983) About Me 

Question 206855: I am trying to find the x-intercepts of x squared minus x plus 25. I have already found the y-intrercept, but I am trying to factor the equation.
Click here to see answer by Alan3354(69443) About Me 

Question 206893: -6z2(squared)+7z+3=0
Click here to see answer by jim_thompson5910(35256) About Me 

Question 206897: y2(squared)=3y-5
Click here to see answer by RAY100(1637) About Me 

Question 206905: How do I write a quadratic equation with 9 as the only solution?
Click here to see answer by Edwin McCravy(20054) About Me 

Question 206845: A photo is 13in. longer than it is wide. A 2 in border is placed around the photo making the total area of the photo and border 108 in^2. What are the dimensions of the photo?
Click here to see answer by ankor@dixie-net.com(22740) About Me 

Question 206924: This is a problem solving question. It's the homework of my son and I'm trying to help him solve these problems but I can't seem to solve them either. Please help y
us. Thank you very much!
The problems are:
1. Find three consecutive integers if the product of the second and third integer is 78 more than 9 times the first.
2. The product of two integers is 64 and their difference is 12. Find the two integers.
3. An object is dropped from the top of the Empire State Building in New York, which is approximately 1444 ft tall. The equation that gives the distance of the object has fallen is d=16t(squared), where d is the distance in feet and t is the time in seconds. How long has the object been falling when it has traveled 400 ft? When does the object hit the ground?
4. The length of the base of a triangle is three times the height. The area of the triangle is 24sqcm. Find the base and height of the triangle.
I hope you can help me. Thank you very much.

Click here to see answer by Alan3354(69443) About Me 

Question 206986: To solve quadratic equations-
The sum of three positive, consecutive numbers is 149. find the numbers.
letx=the first number

Click here to see answer by checkley77(12844) About Me 

Question 207053: I need your help solving the following equation:
m^2=7m
I already have the answer, but I can't manage to solve it by myself, I need a step-by-step solution.
Thank you.

Click here to see answer by Alan3354(69443) About Me 
Question 207053: I need your help solving the following equation:
m^2=7m
I already have the answer, but I can't manage to solve it by myself, I need a step-by-step solution.
Thank you.

Click here to see answer by jim_thompson5910(35256) About Me 

Question 207068: 2x^2-x=-5 solution set= ?
Click here to see answer by edjones(8007) About Me 

Question 207069: write quadratic equation in the variable x having the given numbers as a solution. make sure its in the ax^2+bx+c=0 form. Solution is 10, only solution.
Click here to see answer by solver91311(24713) About Me 

Question 207139: 7x squared plus 5x - 2=0
Click here to see answer by jim_thompson5910(35256) About Me 

Question 207201: Q 5: If the area of a table surface is m2 + m – 30 Sq. In. Given that the length is (m + 6) inches, find the expression to represent the width of the table.

Click here to see answer by checkley77(12844) About Me 

Question 207243: y= (x=2)(x-1)
Find vertex, find axis of symmetry, does it open up or down>

Click here to see answer by Alan3354(69443) About Me 

Question 207261: question is: solve the quadratic equation by completing the square:
x^2+6x=0
x^2+6x(6/2)^2 = (6/2)^2
(sqrt x + sqrt 3^2)^2 = sqrt 9
x+3= +- 3
x+3=3 x+3=-3
x=0 x=-6
This question is not from a textbook, I would like to know if I did the work correctly, thank you so much for your help.

Click here to see answer by RAY100(1637) About Me 
Question 207261: question is: solve the quadratic equation by completing the square:
x^2+6x=0
x^2+6x(6/2)^2 = (6/2)^2
(sqrt x + sqrt 3^2)^2 = sqrt 9
x+3= +- 3
x+3=3 x+3=-3
x=0 x=-6
This question is not from a textbook, I would like to know if I did the work correctly, thank you so much for your help.

Click here to see answer by solver91311(24713) About Me 

Question 207259: the question is: solve the quadratic equation by completing the square:
x^2-20x=0
x^2-20x+(20/2)^2 = (20/2)^2
(sqrt x - sqrt 10^2)^2 = sqrt 100
x-10 = +- 10
x-10=10 x-10 =-10
x=20 x=0
I am checking to make sure I did the work correctly, this isn't from a textbook so I don't have a page # or anything to reference too.
Thank you for your help.

Click here to see answer by solver91311(24713) About Me 
Question 207259: the question is: solve the quadratic equation by completing the square:
x^2-20x=0
x^2-20x+(20/2)^2 = (20/2)^2
(sqrt x - sqrt 10^2)^2 = sqrt 100
x-10 = +- 10
x-10=10 x-10 =-10
x=20 x=0
I am checking to make sure I did the work correctly, this isn't from a textbook so I don't have a page # or anything to reference too.
Thank you for your help.

Click here to see answer by RAY100(1637) About Me 
Question 207259: the question is: solve the quadratic equation by completing the square:
x^2-20x=0
x^2-20x+(20/2)^2 = (20/2)^2
(sqrt x - sqrt 10^2)^2 = sqrt 100
x-10 = +- 10
x-10=10 x-10 =-10
x=20 x=0
I am checking to make sure I did the work correctly, this isn't from a textbook so I don't have a page # or anything to reference too.
Thank you for your help.

Click here to see answer by Edwin McCravy(20054) About Me 

Question 207256: Need to solve the equation to a quadratic. Don't know how to set up this problem.
sqrt4b+1 - sqrtb-2 = 3

Click here to see answer by edjones(8007) About Me 

Question 207247: Last year Al was 6 times Bob's age
In 3 years Al will be (3 X Bob's) + 10

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

Question 207353: Compare the parabola defined by each equation with the standard parabola defined by the equation y = x^2. Describe the corresponding transformations, and include the position of the vertex and the equation of the axis os symmetry.
a.) y = 3x^2 - 8
b.) y = (x - 6)^2 + 4
c.) y = -4(x + 3)^2 - 7

Click here to see answer by Edwin McCravy(20054) About Me 

Question 207427: what is the quadratic equation whose roos are -3 and 5
Click here to see answer by Alan3354(69443) About Me 
Question 207427: what is the quadratic equation whose roos are -3 and 5
Click here to see answer by vleith(2983) About Me 

Question 207435: two consecutive odd integers whose product is 323
Click here to see answer by rfer(16322) About Me 

Question 207416: What will happen to the graph of the quadratic equation if you have a constant term?
Click here to see answer by rfer(16322) About Me 

Question 207432: x^2+ 11x+ 24 = 0
Click here to see answer by jim_thompson5910(35256) About Me 

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, 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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