Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 617744: solve by using the quadratic formula x squared minus two x equals 80 how do you solve this
Click here to see answer by Theo(13342)

Question 617862: ∠a and ∠b are supplementary. If m∠a = 2x + 4 and m∠b = 4x - 10, what is the measure of ∠a?
Click here to see answer by math33(31)

Question 617884: Hi. I'm stuck on this problem. "Find the value of 'n' such that is a perfect square trinomial."
Thanks
Click here to see answer by stanbon(75887)

Question 617911: X Power 3/2 = 10.41 then x=?
Click here to see answer by lwsshak3(11628)

Question 617997: Please help me with this problem:
Compute the positive square root of the discriminant of the parabola f(x) = -6x2 + (18)x + (2) to one place of decimal.
Click here to see answer by ankor@dixie-net.com(22740)

Question 618229: 4x2+3x-8=0
Click here to see answer by Maths68(1474)

Question 618324: A can of cola is 10 cms high.If a can were to be laid all around a rectangular ground measuring 10m by 6m.how many such cans will be needed?
Click here to see answer by mananth(16946)

Question 618369: The following question is asking to solve for x:
� =
I wasn't even sure if this was the right forum to ask. Any help would be great. Thanks.
Click here to see answer by richwmiller(17219)

Question 618424: The area of the Room is 55 square feet the length is 6 feet longer than the width find the length and width of the room? i have to put it in as a quadratic formula

Click here to see answer by ewatrrr(24785)

Question 618422: x^2-4x-6=0
Click here to see answer by ewatrrr(24785)

Question 618421: x2-4x-6=0
Click here to see answer by ewatrrr(24785)

Question 618436: The hypotenuse of a triangle is 5 feet long the longer of the two legs is one foot longer than the other find the length of the shorter leg
Click here to see answer by ewatrrr(24785)

Question 618477: factorise it 3y^2+13y+14
can u plz explain im confused
Click here to see answer by jim_thompson5910(35256)

Question 618477: factorise it 3y^2+13y+14
can u plz explain im confused
Click here to see answer by ewatrrr(24785)

Question 618504: A student throws her math instructor over a building. His height above the ground after t seconds is given by the equation:
h(t)=-16.1t^2+6t+75
How tall is the building?
Click here to see answer by swincher4391(1107)

Question 618516: A student throws her math instructor over a building. His height above the ground after t seconds is given by the equation:
h(t)=-16.1t^2+6t+75
I know that his height in feet after 2 seconds is 22.6ft.
I know that his max height is 75.559 ft.
I cannot figure out how tall the building is though?
Can anyone help?
Click here to see answer by stanbon(75887)

Question 618531: Use a graphing utility to graph the quadratic function. Find the x-intercepts of the graph and compare them with the solutions of the corresponding quadratic equation when y=0.
y=x^2-9x+18

Click here to see answer by stanbon(75887)

Question 618535: f(x)=-1/3x^2
vertex?
equation of the line of symmetry?
Click here to see answer by stanbon(75887)

Question 618560: f(x)=x^2-6x-3
vertex?
equation of line of symmetry?
max/min of f(x)?
is the value of, f(3)=-12 a min or max?
graph
Click here to see answer by John10(297)

Question 618596: Find the equation of the parabola that satisfies the given conditions, and draw the graph...
the parabola passes through three points:(-1,1)(0,4)(1,5)

work so far~ let y=ax^2=bx+c
Click here to see answer by John10(297)

Question 618674: Can U help me with this one? Find The SS Or the value of x and y ... x+y=3 & x-y=5... :) HELPP
Click here to see answer by vleith(2983)

Question 618724: 2x/5x^2-47x+18 - 9x/5x^2-44x-9

Click here to see answer by ewatrrr(24785)

Question 618820: I have to simplify the equation: I have tried simplifying it by using the square root property, since it does not have the middle term. The answer is {-5 sqrt (3), -3, 3,5 sqrt (3)}
Click here to see answer by Alan3354(69443)

Question 618833: A) Build a pattern using tiles for y=x^2-4x+3
B) Show how your pattern would look for x= -2,-1,0,1,2 (do I simply plug these number in the quadratic equation?!)
C) Find the y-intercept and the x- intercept (if any), the turning point (vertex) and the range.

Click here to see answer by solver91311(24713)

Question 618838: x^2-3x-6=0 (completing the square)

and -6x^2=3x+2(using the quadratic formula)

If you can show me how to answer these that would be great im having a little trouble with them.. thank you
Click here to see answer by solver91311(24713)

Question 618890: Use the Quadratic Formula to solve the equation.
-2x2 - 5x + 5 = 0
Click here to see answer by unlockmath(1688)

Question 618955: Find the discriminant then tell whether the equation has two,one, or no solutions
1.3x^2+4x-2=0
2.-5x^2+6x-6=0
3.6x^2-2x+4=0
Click here to see answer by Maths68(1474)

Question 618963: solve the equation t^3-4t^2-3t+5=0 ,can you please show me how to solve it using remainder theorem?
Click here to see answer by vleith(2983)

Question 619066: what is the vertex of x^2-4?!
I think I did it wrong because once I plugged in my input values(-2,-1,0,1,2) I got (-2,-16) (-1,-4) (0,0) (1,-4) (2,-16) so once I graphed it I got a downward parabola, and isnt it supposed to be upward since my x^2 is positive?! Please help me figure this out! Also, once for the the vertex points I did (x+2)=0 and (x-2)=0 to solve for x then I simply plugged it in to find y; however, once I did that my vertex points turned out to be (-2,16) (2,16)! This shouldnt be right since the vertex is the highest and lowest value! Please help... Thank you!
Click here to see answer by jim_thompson5910(35256)

Question 618552: will you please help me solve these solutions 4,-4 and 7,-7
Click here to see answer by richard1234(7193)

Question 619129: I have been stuck on this problem for days can someone please help me use completing the square to describe the graph f(x)=40-12x-x^2 support your answer graphically.
Click here to see answer by mathgranny(13)

Question 619182: Please help me solve 2x^2+6x+5=0
Click here to see answer by ewatrrr(24785)

Question 619187: Please help me graph 2x^2+6x+5=0
Click here to see answer by ewatrrr(24785)

Question 619119: The equation is y=(x+2)^2+k where k is a constant.
a)Find k when its tangent at x=1 passes through (0,0).
b)Find k when the quadratic is tangent to y=-x^2
Click here to see answer by ewatrrr(24785)

Question 619186: If one zero of polynomial 5z2+13z-p is reciprocal of the other then find p.
Click here to see answer by jsmallt9(3758)

Question 619208: Complete the squre for the parabola y=3x^2+5x+17
Click here to see answer by ewatrrr(24785)

Question 619280: During the first part of a trip, a canoeist travels 35 miles at a certain speed. The canoeist travels 14 miles on the second part or the trip at a speed 5 mph slower. The total time for the trip is 2 hours. What is the speed on each part of the trip?
(not understanding how to put this together!)
Click here to see answer by scott8148(6628)

Question 619404: x^2+14x-5=0

I don't get how to solve any of these type of equation completing the square.
Click here to see answer by stanbon(75887)

Question 619621: x^2+3x=28. I need help to solve this problem by completing the square
Click here to see answer by lenny460(1073)

Question 619751: find a quadratic function that fits the set of data points (2,0) (4,3) (12,-5)
Click here to see answer by ewatrrr(24785)

Question 619902: Y=-2xsquared-2x-7 write in vertext form and tell me the vertex please
Click here to see answer by stanbon(75887)

Question 620114: you run a canoe rental business. You charge 12 dollars per canoe and average 36 per day. if you raise the price by fifty cents you lose 2 rentals a day.
12.00*36=432 whats the revenue formula for x price hikes?
Click here to see answer by josmiceli(19441)

Question 620173: admission prices for a football game were $6 for adults and $2 dollars for children the total value of tickets sold was $2528 and 454 tickets were sold. how many adults and children attended the game?
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, 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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, 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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, 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