Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 367307: Solve

Click here to see answer by edjones(7569)

Question 367307: Solve

Click here to see answer by robertb(4012)

Question 367304: Solve each formula for the indicated letter. Assume that all variables represent nonnegative numbers.
solve for x
(number of diagonals of polygon with x sides)
Click here to see answer by edjones(7569)

Question 367255: I've been trying to solve this problem for a while now and no matter what I do I can't get the answers to check. Here's the problem: Joe has a collection of nickels and dimes that is worth $6.20. If the number of dimes was doubled and nickels were decreased by 37, the value of the coins would be worth $4.20. How many nickels and dimes do you have? Any help would be greatly appreciated! Thank you for the help!

Click here to see answer by scott8148(6628)

Question 367386: An Archer shoots an arrow. It's heights (in inches) at three times (in seconds) are given:
Time is t
Distance above ground is s
at 3 seconds, the arrow was 326 ft above the ground
at 5 seconds, the arrow was 350 ft above the ground
at 8 seconds, the arrow was 146 ft above the ground
What is the maximum height of the arrow?
So far, all I have is s=-16t^2+140t+50, but I have no idea how to get the height of the arrow from there.
Click here to see answer by scott8148(6628)

Question 367556: The denominator of a fraction exceeds the numerator by 2. If 5 be added to numerator the fraction increased by unity. The Fraction is?
Click here to see answer by mananth(12270)

Question 367502: find the vertex, line of symmetry, and maximum/minimum value
-2x^2+2x+3
I have tried everything and am completely lost, any help would be appreciated
Click here to see answer by robertb(4012)

Question 367586: Find the value of k so that the equation 3x²-(5+k)x-17=0 will have roots numerically equal but opposite sign.Please answer the question.
Click here to see answer by robertb(4012)

Question 367596: Dal and Kim can assemble a swing set in 1 1/2 hr. Working alone, it takes Kim 4 hr longer than Dal to assemble the swing set. How long would it take Dal, working alone, to assemble the swing set? I do not have a clue how to set this up Please help!!!
Click here to see answer by mananth(12270)

Question 367622: For what value of k will the roots of 4x^2 + 4x + k be equal?
Click here to see answer by robertb(4012)

Question 367668: How can I get a quadratic function from y=x^2 where a=1, b=6 and c=5? I started by (x-1)(x-6) =x^2-7+6 and I don't know where to go from there.
Click here to see answer by Fombitz(13828)

Question 367683: Use the quadratic formula to solve
2N(squred)-3= 5N
If you can give easy directions to answering this question also it would be much appreciated.
Click here to see answer by Fombitz(13828)

Question 367783: find vertex, axis of symmetry, and the maximum or minimum value

Click here to see answer by ewatrrr(10682)

Question 367782: find the vertex, axis of symmetry, and the maximum value or minimum value

Click here to see answer by ewatrrr(10682)

Question 367810: find the x-intercepts of y=x^2+4x-5

Click here to see answer by ewatrrr(10682)

Question 367776: solve

Click here to see answer by Fombitz(13828)

Question 367882: What would the graph look like for y=x-3^2
Click here to see answer by Fombitz(13828)

Question 367898: Find a quadratic equation whose root are 2and5
Click here to see answer by ewatrrr(10682)

Question 368143:
Click here to see answer by Fombitz(13828)

Question 368312: please help me solve this quadratic function :y=x^2+8x=21
Click here to see answer by Fombitz(13828)

Question 368321: Find each of the products and express the answers in the standard form of a complex number. (4+3i)(6+i)
Click here to see answer by Fombitz(13828)

Question 368302: Can you help me out with this!!!
if x=1 is the day tickets go on sale.
Tickets= -0.4^2+20x+122.1

b. What is the number of tickets sold on the 10th day? The 20th day? The 40th day? The 50th day?
Click here to see answer by Fombitz(13828)

Question 368467: A=6s^2
Click here to see answer by Fombitz(13828)

Question 368464: U^2+2u-4=0
Click here to see answer by ewatrrr(10682)

Question 368512: A = 6s2, for s
(Surface area of a cube with sides of length s)

Click here to see answer by Fombitz(13828)

Question 368545: Use polynomial long division to divide
-20x3 – 10x2 – 16x – 8
by
-5x2 – 4
Click here to see answer by Fombitz(13828)

Question 368554: find vertex, axis of symmetry and the minimum or maximum value

Click here to see answer by Fombitz(13828)

Question 368537: 3x²-3x-2=0 a=3 b=-3 c=-2

Click here to see answer by Fombitz(13828)

Question 368573: find vertex and axis of symmetry

Click here to see answer by Fombitz(13828)

Question 368621: Hello. Can you please help me? It's greatly appreciated.
solve equation by factoring:
3x^2 - 13x -10 thank you!
Click here to see answer by jim_thompson5910(28593)

Question 368621: Hello. Can you please help me? It's greatly appreciated.
solve equation by factoring:
3x^2 - 13x -10 thank you!
Click here to see answer by stanbon(57323)

Question 368606: find vertex and axis of symmetry

so far I've done...

vertex= (11.25, -2.25)
axis of symmetry= 11.25
not sure if my numbers are right!
Click here to see answer by Alan3354(30993)

Question 368640: Hello. Can you please help me?
I need to find two consecutive even positive integers whose product is 624??
thank you!
Click here to see answer by Alan3354(30993)

Question 368644: Find an equation of the line containing the given pair of points (3,5) (9,9)
type answer in slope-intercept form
Click here to see answer by rfer(12657)

Question 368602: Can you please help me factor and find the roots of the equation h=-16t^2+24t
Click here to see answer by dlh(17)

Question 368684: Car speed. On a sales trip, Mark drives the 600 mi to Richmond averaging a certain speed. The return trip is made at an average speed that is 10 mph slower. Total time for the round trip is 22 hr. Find Mark’s average speed on each part of the trip.
Click here to see answer by stanbon(57323)

Question 368747: Divide
3 over 3+i
Click here to see answer by stanbon(57323)

Question 368879: x2+12x=-20
Click here to see answer by Fombitz(13828)

Question 368896: Using the 2 solutions and the foil technique, create a quadratic equation.
(x-6) (x-4)
x=6,4
Click here to see answer by robertb(4012)

Question 368978: Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this.
8y + 2x = 48
2x = 4y – 12
Click here to see answer by lefty4ever26(59)

Question 368683: Solve by factoring.
10t^2 - t - 2 = 0
Click here to see answer by lefty4ever26(59)

Question 368649: Can you please help me find the vertex and factor the equation of y=-16x^2+24x
so far for factoring it I have y=-8x(2x-3) but I am not sure if I did that right.
Click here to see answer by lefty4ever26(59)

Question 367246: how u solve nd check 6x-2=2x-1
Click here to see answer by lefty4ever26(59)

Question 368985: A = Ao(1 – r)2 for r
(A business formula)

That is a small zero at the bottom of the A

Click here to see answer by Fombitz(13828)

Question 367560: Solving (2x+3)(2x+5)(x-1)(x-2)=30, the roots available are :
Click here to see answer by lefty4ever26(59)

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