Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 751745: Solve: 16x^2-72x=-85
Not sure if I'm suppose to factor or use the quadratic equation? Help would be appreciated! :)
Click here to see answer by josmiceli(19441)

Question 751822: how many solutions does the following system of equation have

Click here to see answer by FrankM(1040)

Question 751822: how many solutions does the following system of equation have

Click here to see answer by lenny460(1073)

Question 751984: Factor Completely
a^2-2ab-3b^2
Click here to see answer by richwmiller(17219)

Question 752508: A rock is thrown up from the ground at a velocity of 84 feet per second. The formula h = �16t^2 + 84t gives the rock�s height in feet after t seconds. What is the maximum height of the rock?
Click here to see answer by stanbon(75887)

Question 752520: How would you solve x^2 + 10x?
Click here to see answer by tommyt3rd(5050)

Question 752521: How do you solve -x^2 + 10x?
Click here to see answer by tommyt3rd(5050)

Question 752526: Find the -xintercept(s) and the coordinates of the vertex for the parabola x^2 - 2x - 24=y . If there is more than one -intercept, separate them with commas.
Click here to see answer by MathLover1(20849)

Question 752612: the sum of reciprocal of rehman age[in years],3 years ago 5 years from now is 1/3.find his present age.
Click here to see answer by dkppathak(439)

Question 752607: THE ALTITUDE OF RIGHT ANGLE TRIANGLE IS 7 cm LESS THAN ITS BASE.IF THE HYPOTENUSE IS 13 cm,FIND THE OTHER TWO SIDES

Click here to see answer by dkppathak(439)

Question 752606: This is another question about parabola.
A tunnel is to built to allow 2 lanes of traffic to pass from one side of a mountain to the other side. The largest vehicles are trucks, which can be considered as rectangles 5m wide and 7m high.
Investigate the cross-section of a parabolic tunnel and find a possible equation to represent it. Allow some space so trucks do not bump into each other or the sides of the tunnel. it have to be use algebra and geometry to solve this problem
many thanks
Click here to see answer by josgarithmetic(39616)

Question 752683: x^2-9=0
Click here to see answer by tommyt3rd(5050)

Question 752699: 25
x2
+
10
x
= 63
Click here to see answer by MathLover1(20849)

Question 752764: How can I solve the quadratic equation 6x(exponent 2) - 19x=0
Click here to see answer by MathLover1(20849)

Question 752889: Solve using to quadratic formula: 2n^2+3n+5=0. Can anyone explain this to me? Thanks!
Click here to see answer by josgarithmetic(39616)

Question 753009: Solve.
p^2-p+1=0
Click here to see answer by tommyt3rd(5050)

Question 753262: Which of the following constants can be added to x^2 - 10x to form a perfect square trinomial?
10, 25,or 100
Click here to see answer by stanbon(75887)

Question 753277: The width and the length of a rectangle are consecutive even integers. If the width is decreased by 3 inches, then the area of the resulting rectangle is 24 square inches. What is the area of the original rectangle?
12 in^2
48 in^2
96 in^2
Click here to see answer by josgarithmetic(39616)

Question 753286: how do you simplify x^2-1/x+2 divided by x+1/x-2
Click here to see answer by MathLover1(20849)

Question 753365: Solve
t^2 + 3 = 6t
Click here to see answer by unlockmath(1688)

Question 753365: Solve
t^2 + 3 = 6t
Click here to see answer by solver91311(24713)

Question 753455: How do you solve 2x^+4x+1

Click here to see answer by puppy4c(5)

Question 753469: Need Help with this question
Determine the quadrant(s) in which (x,y) is located so that the condition(s) is (are) satisfied.
x > 6 and y < 0

Click here to see answer by josmiceli(19441)

Question 753835: I would like to know the intersection points of a parabola and line when:
y=x^2+x-3
y=x-1
Thank you.
Click here to see answer by Cromlix(4381)

Question 753918: write a qudratic function with zero at each pair of values 3 and 4
Click here to see answer by ankor@dixie-net.com(22740)

Question 753983: What is the slope of a polynomial 2x-10
Click here to see answer by Alan3354(69443)

Question 753983: What is the slope of a polynomial 2x-10
Click here to see answer by MathTherapy(10551)

Question 754058:
Click here to see answer by blueplanet(7)

Question 754104: A man travels 108km at a constant speed and finds that he could have made the journey 4.5 hours shorter if he had travelled 2km/h faster. What was his speed?
Click here to see answer by blueplanet(7)

Question 754101: The difference of two numbers is 16 and the sum of their squares is 130. Find the two numbers.
I got -9 and -7, but one should be positive and I don't know what I have done wrong?
Click here to see answer by lwsshak3(11628)

Question 754103: The perimeter of a rectangle is 40cm and it's area is 84cm squared.
a). If the width of the rectangle is xcm, express the length of the rectangle in terms of x
b). Find the length and width of the rectangle
Click here to see answer by Cromlix(4381)

Question 754051: 5b^2-11b-12=0
Click here to see answer by Cromlix(4381)

Question 754211: can u help me with this equation 18^2-23+7
Click here to see answer by rothauserc(4718)

Question 754233: evaluate the expression for the given value of the variable.
-x^2 - 4x; x = -3
Click here to see answer by static(2)

Question 754465: A ladder is resting against a wall. The top of the ladder touches the wall at a height of 10 feet. Find the distance from the wall to the bottom of the ladder if the length of the ladder is two feet more than its distance from the wall.
Click here to see answer by MathLover1(20849)

Question 754471: There are two positive numbers (x,x+2), and the sum of their squares is 580. What are these numbers.
Click here to see answer by Alan3354(69443)

Question 754481: Find two positive consecutive odd integers whose product is 63.
Click here to see answer by Alan3354(69443)

Question 754534: Two projectiles are simultaneously launched. The height in meters , h(base 1) t and h(base 2)t of the first and second projectiles as a function of time t in seconds since the launch are given by the rules h(base 1)t = -2t^2+ 20t + 50 and h(base 2) = 2t +66 .
a) How long after their launch will the two projectiles be at the same height?
b) Over what interval of time since the launch is the first projectile higher than the second?
Can you please help me out? Thanks so much in advance:)
Can you also please show the steps it would really help me understand:)
Click here to see answer by stanbon(75887)

Question 754690: please show me how to solve this problem 2(12g^2-g)=15 using quadratic equation .
thank you vary much,
Summer Breeanne

Click here to see answer by stanbon(75887)

Question 754719: What are the a, b and c terms in the quadratic equation with the answers -3 and -5?
Click here to see answer by stanbon(75887)

Question 754823: What is the minimum or maximum value of the quadratic function: ?

Click here to see answer by tommyt3rd(5050)

Question 754963: The length of a rectangular garden is 6 more than the width. The area is 27 sq. units. Find the dimensions of the garden using the quadratic formula.
Click here to see answer by Cromlix(4381)

Question 755020: is this a quadratic equation -2x^2+2x+1=9
Click here to see answer by solver91311(24713)

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, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 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