Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 324935: (a+b)(a-b)(1+x)(1-x)=4abx.Find x.
email is: sriyan5@yahoo.com
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Question 324949: A golf ball is hit from the ground with an initial velocity of 208 feet per second. How long will it take the golf ball to hit the ground?
Click here to see answer by Alan3354(30993)

Question 324988: Determine the coordinates of the vertex for the quadratic equation y = 4x2 + 10x + 5
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Question 324983: can you help me with radicals and simplifying them

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Question 324918: f(x)=x^2+3x+40
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Question 325020: What is the positive square root of 5625=c^2
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Question 325097: the perimeter of a rectangle is 40cm. If the length is 4cm greater than the width, what are the dimensions of the rectangle?
Click here to see answer by mananth(12270)

Question 325096: John likes dark coffe beans, which cost $8.50/kg. Brad likes mild coffe beans which cost $9.20/kg. They buy a 5.5kg made from a blend of both type of beans that cost $48.50. How many kg of each type of bean went into the mixture?
Click here to see answer by checkley77(12569)

Question 325075: 2w(4w+1)=1
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Question 325106: John likes dark coffe beans, which cost $8.50/kg. Brad likes mild coffe beans which cost $9.20/kg. They buy a 5.5kg made from a blend of both type of beans that cost $48.50. How many kg of each type of bean went into the mixture?
Click here to see answer by stanbon(57282)

Question 325154: You will need to use the formula 4.9t^2 + v0t = s, where t is the time in seconds, v0 is the initial velocity, and s is the distance in meters.
Approximately how far will an object fall in 13 seconds (t) when thrown downward at an initial velocity of 10 meters per second (v0) from a plane?
Click here to see answer by stanbon(57282)

Question 325179: How many solutions are there to the equation x^2 - 15 = 0 ?
F.0
G.1
H.2
J.4
K.15

Click here to see answer by unlockmath(1599)

Question 325251: Solve the equation 4x^2-7=0 by using the square root property.

Click here to see answer by Alan3354(30993)

Question 325153: Roberto invested some money at 7%, and then invested $2000 more than twice this amount at 9%. His total annual income from the two investments was $2930. How much was invested at 9%?

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Question 325296: 3x2 + 2x = 7
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Question 325297: Solve by using the quadratic formula. Show complete solutions.
2x^2 + 9x - 7 = 0
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Question 325298: A rectangular lawn measuring 8m by 4m is surrounded by a flower bed of uniform width. The combined area of the lawn and flower bed is 165m². What is the width of the flower bed?
Let x be the width of the flowerbed
(8+2x)(4+2x)=165

Click here to see answer by jim_thompson5910(28536)

Question 325299: The length of a rectangle is four more than the width. If the area of the rectangle is 621 m2, find the width and length of the rectangle.
Let w be the width. Therefore w + 4 is the length.
w(w +4) = 621

Click here to see answer by jim_thompson5910(28536)

Question 325322: A boat went 10km upstream against the current then turned around and went 15km downstream with current. The current speed was 3km/hour and upstream trip took 30 minutes longer. What was the speed of the boat without the speed of the current?
Click here to see answer by mananth(12270)

Question 325327: change y=1/2x^2 + 6x + 4 into the form y=a(x-h)^2+k. How do I do this algebraically?
Click here to see answer by Theo(3458)

Question 325398: if the sides of a square are lenghtened by 8cm, the area becomes 225cm².Find the lenght of a side of the original square
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Question 325398: if the sides of a square are lenghtened by 8cm, the area becomes 225cm².Find the lenght of a side of the original square
Click here to see answer by Edwin McCravy(8893)

Question 325434: x^18*x^0
Click here to see answer by unlockmath(1599)

Question 325467: how do i solve this rational equation?
3x/(x-4) + x/(x+4) = 24/(x^2-16)
Click here to see answer by jim_thompson5910(28536)

Question 325459: Write a quadratic equation with the only solution of 2.
Click here to see answer by Alan3354(30993)

Question 325540: Please help me solve y^3 - 7y^3/2 -8= 0
Click here to see answer by Fombitz(13828)

Question 325572: A boat went 10km upstream against the current then turned around and went 15km downstream with current. The current speed was 3km/hour and upstream trip took 30 minutes longer. What was the speed of the boat without the speed of the current?
Click here to see answer by mananth(12270)

Question 325620: The path of a ball projected in the air can be represented by the equation h=-16t^2+64t where h represents height, and t represents time. At what times is the ball 48 feet high?
a.)-1 second and -3 seconds
b.)1 second and 3 seconds
c.)1 second and 4 sesconds
d.)1 second and 2 seconds
Click here to see answer by AAfter Search(61)

Question 325626: what number is used to complete the sqaure for the equation x^2=20x
a.)-100
b.)-10
c.)10
d.)100
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Question 325626: what number is used to complete the sqaure for the equation x^2=20x
a.)-100
b.)-10
c.)10
d.)100
Click here to see answer by JBarnum(2044)

Question 325777: What are the x intercepts of y + 12 = x2 + x?
Click here to see answer by nyc_function(2733)

Question 325821: Find the vertex of the parabola formed by the following quadratic function: y = -x2 – 4x – 9
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Question 325849: Write a quadratic equation in the variable x having the given numbers as solutions. Type the equations in standard form, ax^2+bx+c=0.
Solution: 1, only solution. The equation is what =0?
Solution: 10, only solution. The equation is what =0?
-sqrt(6),6sqrt(6). The equation is what =0?
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Question 325846: Write a quadratic equation having the given numbers as solutions: -11 and -9. The quadratic equation is what =0?
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Question 325792: Could you help me please? If a pro basketball player has a vertical leap of about 20 inches, what is his hang time? Use the hang-time function V=48T^2. His hang time is how many seconds? Need to simplify answer and use a integer or a decimal rounded to the nearest tenth. Thank you.
Click here to see answer by solver91311(16872)

Question 325806: The flower garden has the shape of a right traingle. 51 ft. of a perennial border forms the hypotenuse of the traingle, and one leg is 21 ft. longer than the other leg. Find the lengths of the legs. What are the lengths of the legs in ft?
Click here to see answer by checkley77(12569)

Question 325887: . Four research participants take a test of manual dexterity (high scores mean better dexterity) and an anxiety test (high scores mean more anxiety). The scores are as follows.

Person Dexterity Anxiety
1 1 10
2 1 8
3 2 4
4 4 -2

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Question 325884: Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that people should spontaneously follow a 24-hour cycle of sleeping and waking—even if they are not exposed to the usual pattern of sunlight. To test this notion, eight paid volunteers were placed (individually) in a room in which there was no light from the outside and no clocks or other indications of time. They could turn the lights on and off as
they wished. After a month in the room, each individual tended to develop a
steady cycle. Their cycles at the end of the study were as follows: 25, 27, 25, 23,
24, 25, 26, and 25. Using the .05 level of significance, what should we conclude about the theory that 24 hours is the natural cycle? (That is, does the average cycle length under these conditions differ significantly from 24 hours?) (a) Use the steps of hypothesis testing. (b) Sketch the distributions involved. (c) Explain your answer to someone who has never taken a course in statistics.

Click here to see answer by stanbon(57282)

Question 325958: Give an example of a quadratic equation with exactly one real solution
Click here to see answer by Edwin McCravy(8893)

Question 325958: Give an example of a quadratic equation with exactly one real solution
Click here to see answer by solver91311(16872)

Question 326122: Two airplanes are leaving O'Hare at the same time, on bound for New york and the other for california. The one heading to California has a tail wind and is thus going 25MPH faster than the one headed for New York. If after one hour they are 575 miles apart, what are their speeds?
Click here to see answer by solver91311(16872)

Question 326123: How many ounces of pure gold must be added to five ounces of something that is 1% gold in order that the mixture is 6% gold?

Click here to see answer by Fombitz(13828)

Question 326178: Write each statement using mathematical symbols
n is the product of the difference between n squared and seven, and n cubed

ten less than the quotient of n and the difference between n and six
Click here to see answer by stanbon(57282)

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