Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 629642: Stopping at the apple stand for his weekly purchase of fifty cents� worth of apples, Professor Digit was pleased to find that he was given five more apples than usual.
�Hmm!� he said. �I see the price has gone down ten cents per dozen.�
What was the new price per dozen?

This will be a quadratic equation. I can solve it if you can figure out what the equation is. Thank you!!
Click here to see answer by MathTherapy(10549)

Question 629850: 3x^2 -6x +1=0
Click here to see answer by jim_thompson5910(35256)

Question 629878: Solve Equation by completing square X^2-3x-4=0
Click here to see answer by Tatiana_Stebko(1539)

Question 629882: r(r-8)/(2r+6)<0
Click here to see answer by lwsshak3(11628)

Question 629880: 3n^2-7n≥6
Click here to see answer by lwsshak3(11628)

Question 629879: Solve (a)
(x-2)(x+2)(x+5)≤0

(b)(x+3)^2(4x-7)≤0
Click here to see answer by lwsshak3(11628)

Question 630041: Please help me solve:
(2t-5)^2=24
I know I have to use the quadratic formula, but I can't figure it out.
Click here to see answer by stanbon(75887)

Question 630044: Please help me solve:
x^2=180
I know I have to use the quadratic formula, but I can't figure it out.
Click here to see answer by stanbon(75887)

Question 630044: Please help me solve:
x^2=180
I know I have to use the quadratic formula, but I can't figure it out.
Click here to see answer by ewatrrr(24785)

Question 630045: Please help me solve:
(b-4)^2=16
I know I have to use the quadratic formula, but I can't figure it out
Click here to see answer by stanbon(75887)

Question 630039: Please show me how to solve:
x^2+8x=12
I know I have to use the quadratic formula, but I can't figure it out.
Click here to see answer by ewatrrr(24785)

Question 630037: Please show me how to solve:
x^2=8x-5
I know I have to use the quadratic formula, but I can't figure it out.
Click here to see answer by ewatrrr(24785)

Question 630037: Please show me how to solve:
x^2=8x-5
I know I have to use the quadratic formula, but I can't figure it out.
Click here to see answer by solver91311(24713)

Question 630036: Please show me how to solve:
12x^2-11x=5
I know I have to use the quadratic formula, but I can't figure it out.
Click here to see answer by ewatrrr(24785)

Question 630080: using the Quadratic Formula how can i solve �x^2 + x = 1
Click here to see answer by richwmiller(17219)

Question 630080: using the Quadratic Formula how can i solve �x^2 + x = 1
Click here to see answer by graphmatics(170)

Question 630519: If m and n are the roots of the equation then what is the equation whose roots are and ?
Click here to see answer by richard1234(7193)

Question 630606: Hello
I have couple questions.
1) what is the exact values of x^2+4x-20=0
and how can I find it
2)a floor measures 12m by 8m. a rug covers one-third of the floor.the uncovered part of the floor forms a uniform strip around the rag . how wide is the strip ?
Thanks for helping
Click here to see answer by stanbon(75887)

Question 630611: what is the quadratic equation for the given solutions 7i and -7i
Click here to see answer by stanbon(75887)

Question 630634: Carlos trows a rock from the pier. The height of the rock h(t) can be moxled by the function. h(t)=-5t^2+13t+6. When will the rock hit the water ? What is the maximum height of the rock ?

Click here to see answer by stanbon(75887)

Question 630715: The student council of Sta. Luucia needed 2,250 for an annual trip. If 5 more members joined the group, each member would then save 5. How many students planned to make the trip?

Click here to see answer by lwsshak3(11628)

Question 630719: Solve for x/complete the square: 5x^2+2x√10=1?
Click here to see answer by jsmallt9(3758)

Question 630741: Use the "DIFFERENCE of SQUARES" rule to factor the following expression:
16x^4-121y^4

Tutors, I have no idea of where to start?

Click here to see answer by reviewermath(1029)

Question 630716: The velocity of a blood corpuscle in a vessel depends on how far the corpuscle is from the center of the vessel. Let R be the constant radius of the vessel Vm, the constant maximum velocity of the corpuscle; r, the distance from a center to a particular blood corpuscle (variable); and Vr, the velocity of that corpuscle. The velocity Vr is related to the distance r
according to Vr=Vm(1-r2/R2). find f when Vr = 1/4 Vm
Click here to see answer by Alan3354(69443)

Question 630839: Solve the quadratic equation by using the definition of square root and write the solutions in radical form. Simplify the solutions.
4(y+5)^2=128

Answer:
y= ___ , ___
Click here to see answer by nerdybill(7384)

Question 630949: give solutions for (x-7)^2=18 give solutions not the decimals
Click here to see answer by stanbon(75887)

Question 630955: f(x)=-(x+5)^2-6 what is the vertex
Click here to see answer by reviewermath(1029)

Question 630962: if discriminant is greater than 0,then two solutions are present.which one of the two solutions is preferable ? and why ?
Click here to see answer by Alan3354(69443)

Question 631032: Complete the square: y=4x^2+24x-13
Click here to see answer by ewatrrr(24785)

Question 631033: Rogelio and jin are looking up at the top of a tower that 36.6m tall. If jin is looking at an angle of elevation of 24 degrees, and rogelio is on the opposite side of the tower looking up at an angle of 17 degree, how far apart are rogelio and jin to the nearest meter? Assume their eyes are both 1.8m off the ground.
Click here to see answer by dfrazzetto(283)

Question 631195: determine the nature of the solutions of the equation
t^2-6t=0
A) 2 real solutions
B)1 real solution
C) 2 imaginary solution
Click here to see answer by solver91311(24713)

Question 631190: What does it mean to "describe what the solution(s) represent to the graph"?
For example, I had a equation and I solved it to ge the solutions x = -2 and x = -3. I put down the parabola opens upward since the "a" of the quadratic equation is positive. Is there more to this answer or am I correct?
Click here to see answer by solver91311(24713)

Question 631189: What does it mean to "describe what the solution(s) represent to the graph"?
For example, I had a equation and I solved it to ge the solutions x = -2 and x = -3. I put down the parabola opens upward since the "a" of the quadratic equation is positive. Is there more to this answer or am I correct?
Click here to see answer by solver91311(24713)

Question 631077: The exact x values of x^2+4x-20=0
Click here to see answer by jim_thompson5910(35256)

Question 631098: I have tried and tried on this problem and just cant get it right. I even had a tutor online help me and they got it wrong too... this is the problem ...
Solve the system of equations. Round approximate values to the nearest ten-thousandth.
y = log2x
y = x−5
Click here to see answer by richwmiller(17219)

Question 631393: if a+b+c=0 and a,b,c are rational then the roots of the equation (b+c-a)x�+(c+a-b)x+(a+b-c)=0 are
Click here to see answer by AnlytcPhil(1806)

Question 631402: if the equation (k2-3k+2)x2+(k2-5k+4)x+(k2-6k+5)=0 is an identity then the value of k is ?
Click here to see answer by solver91311(24713)

Question 631438: solve the following quadratic equaton for x
(2x+1)(x+3)=0
Click here to see answer by ewatrrr(24785)

Question 631492: please help: 25m^2=20m
Click here to see answer by Tatiana_Stebko(1539)

Question 631400: the number of positive integral solutions satisfying of x and y satisfying x4-y4=2007196 is
Click here to see answer by Edwin McCravy(20054)

Question 631338: Suppose ax^2+bx+c=0 is a quadratic equation which has real complex roots. Why should it have complex conjugate roots? [Hint: Think of how roots of a quadratic equation are derived using the quadratic formula]
(please help me with this)
Click here to see answer by richard1234(7193)

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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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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