Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 564338:
the length of a retangle is twice the width.the area is 200yd^2??? Can someone help me please!!!!!find the lenght and width
Click here to see answer by Alan3354(31518)

Question 564341: give exact and approiximate to 3 decimals places:x^2+8x+16=25
Click here to see answer by ad_alta(240)

Question 564417:
Click here to see answer by Alan3354(31518)

Question 564420: f(x)=x^2-10x-5
The solutions are 5,-30
I need to graph this but don't know how.
Could someone please draw me a picture of how it will look on a graph?
Click here to see answer by stanbon(57967)

Question 564379: find the rule of the mapping:
0-1
1-1
2-4
3-27
4-256
5-3125
Click here to see answer by richard1234(5390)

Question 564945: I need help on this one please
f(x)= 1/4(x+9)^2+1
I need to find out what the vertex is____
I need to find out what the line of symmentry is _____
I need to find out what is the max/min value of fx is _________
Click here to see answer by Alan3354(31518)

Question 565344: Hi. I'm looking for the quadratic equation that describes the following three sets of coordinates: (5,19) (75,75) (150, 101). Please help. I have no idea where to begin. Thanks!!!
Click here to see answer by lwsshak3(6755)

Question 565617: I have to come up with an quadratic equation with the solutions of:
x=-3
x=0
x=5
I am confused because I was no aware of a solution being a negative number, or quadratic equation having 3 soultions. I am speechless on how to come up with an quadratic equation. Could you please help me?
Click here to see answer by stanbon(57967)

Question 565615: I have a quadratic equation that I need to solve for. The solution is: I have to come up with an equation.
x = 3
x = 6
So would you reverse and use (x-3) (x-6)?
Click here to see answer by stanbon(57967)

Question 565650: why is it necessary to know different methods of solving quadratic equations?
Click here to see answer by Alan3354(31518)

Question 565692: How do I solve this?
y = 2x - 4
y = -2x + 4

Daren Smith
Click here to see answer by Leaf W.(97)

Question 565690: Solve,
x + y = 6
y = 2x - 3
I'm completely lost
Daren
Click here to see answer by ankor@dixie-net.com(15746)

Question 565570: What is the lenghts of the legs?
The hypotenuse of a right triangle is 4 cm long. One leg is 1 cm longer than the other. Find the lengths of the legs. Round to the nearest tenth.
Thank You =)

Click here to see answer by ankor@dixie-net.com(15746)

Question 565869: 4x2-3=9
Click here to see answer by ad_alta(240)

Question 565872: 3(x-5)2=21
Click here to see answer by ad_alta(240)

Question 565891: A 24-inch-wide sheet of metal is to be bent into a rectangular trough with the cross section shown in the illustration. Find the dimensions that will maximize the amount of water the trough can hold. That is, find the dimensions that will maximize the cross-sectional area.(depth and width = 24 inches)
Click here to see answer by solver91311(17077)

Question 566000: The directions are: Solve over the complex numbers
The problems are b-3 sqrt of b -10=0 (b minus 3 times the square root of b minus 10 equal 0.
and 2x-9 sqrt x + 4=0 (2x minus 9 times the square root of x plus 4)
The title of the paper is the Discriminant: equations in quadratic form. Since there is no squared number in these I don't know how to begin doing them.
Thank you!
Click here to see answer by stanbon(57967)

Question 566320: Find two consecutive negative integers such that the sum of their squares is 113.
Click here to see answer by ad_alta(240)

Question 566456: factor and solve the following quadratic equation.
4x^2+10x=x^2-x+4
Click here to see answer by mananth(12270)

Question 566846: 4/7,7 WHATS THE QUADRATIC EQUATION?
Click here to see answer by solver91311(17077)

Question 567184: -4x+5y=20 in y-intercept form and graph
Click here to see answer by mananth(12270)

Question 567353: A flag is raised while an onlooker watches from a distance of 21 feet away from the base of the flag pole (see the figure below). The flag rises vertically at a rate of 8 inches per second. Let t denote the time (in seconds) after the flag begins to rise (For simplicity, assume that when the flag begins to rise it is 0 inches above the ground). Express the distance d (in feet) between the flag and the onlooker as a function of t.
All of the answers I come up with are incorrect! Any help is greatly appreciated!!! Thanks!
Click here to see answer by ankor@dixie-net.com(15746)

Question 567351: A box with an open top is constructed from a rectangular piece of cardboard which is initially 30 inches long and 23 inches wide. The box will be formed by removing squares of length x inches from each corner and then folding up the sides (as shown below). Express the volume (V) of the box as a function of x.
I've been trying to figure out this problem for a while, any help is greatly appreciated!!! Thanks!
Click here to see answer by ankor@dixie-net.com(15746)

Question 567571: Tell whether y=-3x^2+18x-20 has a minimum value or a maximum value?Then find the minimum or maximum value.
Click here to see answer by lwsshak3(6755)

Question 567780: The quadratic equations are difficult. I need help with this equation.
Write a quadratic equation having the given numbers as solutions - sqrt5 and 8sqrt5.
Click here to see answer by Alan3354(31518)

Question 567835: How do you get the quadratic equation if you are given a table of values?
Click here to see answer by issacodegard(60)

Question 566230: how do you solve the equation 4p^2-90=-9p?
Click here to see answer by jim_thompson5910(28715)

Question 568196: a pool is to be 30 feet wide and 90 feet long. A walkway is to be built around the entire pool. if the combined area cannot exceed 4000 square feet what are the possible widths of the walkway?

Click here to see answer by mananth(12270)

Question 568520: how do you completely factor y5-26y
Click here to see answer by jim_thompson5910(28715)

Question 568627: I have no idea why I got a certain answer. This is my problem: 5/6x+30=x then I multiplied both by 6 and added them together to get 185. Am I correct? If so, how does that answer work?
Click here to see answer by nyc_function(2733)

Question 568662: 3x^2-x-5=0
Click here to see answer by jim_thompson5910(28715)

Question 568741: x^2+3x+8=5
Click here to see answer by jim_thompson5910(28715)

Question 568702: Model with a quadratic equation, then solve.
Find the dimensions of a square picture that make the area of the picture equal to 75% of the total area enclosed by the frame. The total length of the side is 12inches, including the frame.
I thought y=axsquared for the equation
144=0.75x2
192=x2
x=13.9 But this is larger than the length of the picture frame???

Click here to see answer by KMST(1936)

Question 568822: whats the quadratic equation for the table x=1 and 3 when y =0 for both of them?
Click here to see answer by stanbon(57967)

Question 569018: One leg of a right traingle is 3 inches shorter than the hypotenuse. The other leg is equal to 8 inches. How long is the first leg?
The correct answer is 55/6 inches, but I can't figure out how ot get it. Please help me!
Click here to see answer by stanbon(57967)

Question 569015: One leg of a right triangle is 7 miles longer than the other. The hypotenuse is equal to 13 miles. How long is the shorter leg?
The correct answer is 5 miles.
please help me see how to do this!
Click here to see answer by Alan3354(31518)

Question 569115: How do you solve this quadratic equation explain process.
te{5/3,3/2}
Click here to see answer by Alan3354(31518)

Question 569093: how do i find the solution of x2-x+3/16=0 by factoring?
Click here to see answer by Alan3354(31518)

Question 569208: Which of the binomials below is a factor of this expression? 25x2 - 9y2 z2
Click here to see answer by stanbon(57967)

Question 569221: y=x-1
y=-x=1

Click here to see answer by Alan3354(31518)

Question 569428: Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax2 + bx + c = 0.
Solutions: -9 and 6.

Click here to see answer by stanbon(57967)

Question 569266: How do you find a quadratic equation if you are only given the solution? Is it possible to have different equadratic equations with the same solution?
Click here to see answer by richard1234(5390)

Question 569254: How do you know if a quadratic equation will have one, two, or no sloution?
Click here to see answer by richard1234(5390)

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