Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 183648: Identify each of the equations as representing a circle, a parabola, an ellipse, a hyperbola, or none of these:
a) x(x-3)=y(1-2y^2)
b)2x^2+4y^2=y+2x
c)y=3(1-2x)(1+2x)
Click here to see answer by stanbon(57282)

Question 183677: y= x2-2x-3
and how do you graph it?
Click here to see answer by jim_thompson5910(28536)

Question 183815: I don't know how to get started solving
5x^2 - 210x
Click here to see answer by checkley77(12569)

Question 183855: Method Substitution
5. Find the point of intersection of each pair of lines.
b) 4x+2y=7
-x-y=6
Please, i dont know how to do it thank you very much!!!!
Click here to see answer by stanbon(57282)

Question 183828: Given a polynomial and one of its factors, find the remaining factors of the polynomial. some factors may not be binomials.
PROBLEM:
(29) x^4+2x^3+2x^2-2x-3;x+1
Please help me with this question I have try time and time again and i just don't seem to know where to even begin. please help and thank you
Click here to see answer by stanbon(57282)

Question 183872: Method of Elimination Word Problem
8. Mehrab works in a department store selling sports equipment. Baseball gloves cost $29 each and bats cost $14 each. One shift, he sells 28 items. His receipts total $647.
a) How many bats did Mehrab sell?
b) How many gloves did he sell?
Please i dont know how to do it. thank you very much!!!
Click here to see answer by tvandenberg(45)

Question 183951: x^2 + 14x+ 24 =0
ok so x^2 + 14x = -24
then my book says x^2 + 14x +49= 25 how did my text book get the 49?

then it continues (x + 7)^2 =25

x +7 = +-5
x=-7 +-5
so x= -2 or -12 i know how my book got the answer but not sure how my book got the 49 before(x+7)^2=25
Click here to see answer by edjones(7569)

Question 183985: The National Gizmo Corporation calculates that its profit, in thousands of dollars, on the sale of x thousand gismos is given by p(x)= -2x^2 + 52x + 30. How many gizmos must be sold in order to earn a maximum profit?
Click here to see answer by nerdybill(6951)

Question 183997: solve using the quadratic formula, simplify the exact answer:
2x^2+12x=-2x^2-6
Click here to see answer by Alan3354(30993)

Question 183995: write an equation for the following function in vertex form:
then it shows a parabola,
the vertex is (2,1) and the point is (-2,5)
Click here to see answer by stanbon(57282)

Question 184012: write an equation for the following function in x-intercept form:
it shows the parabola,
and the following points are labeled:
(3,0) (7,0)
i think they're intercepts?
and then (6, -9)
Click here to see answer by stanbon(57282)

Question 184017: where do i begin with x(x+3)=40
Click here to see answer by stanbon(57282)

Question 184028: (4x-3)(x+8)=0
Click here to see answer by jim_thompson5910(28536)

Question 183988: How do you solve these?
2x^2-12x = -14 and -4r^2+21r = r + 13
Click here to see answer by jim_thompson5910(28536)

Question 183984: The National Gizmo Corporation calculates that its profit, in thousands of dollars, on the sale of x thousand gismos is given by p(x)= -2x^2 + 52x + 30. How many gizmos must be sold in order to earn a maximum profit?
Click here to see answer by josmiceli(9664)

Question 184090: x^2 - 12x =45
x^2 -12x +36=81 (need to know how my text book got +36 and 81)
(x-6)^2 =81
x-6= +-9
x= +-9 +6
x=15 or -3
Click here to see answer by Earlsdon(6287)

Question 184090: x^2 - 12x =45
x^2 -12x +36=81 (need to know how my text book got +36 and 81)
(x-6)^2 =81
x-6= +-9
x= +-9 +6
x=15 or -3
Click here to see answer by jim_thompson5910(28536)

Question 184027: seven more then 11 times a number is 6 times the square of the number
Click here to see answer by ankor@dixie-net.com(15645)

Question 184112: Aki's Bycycle Designs has determined that when x hundred bicycles are built, the average cost per bycycle is given cy C(x)=0.7x^2-1.3x+10.679, where C(x) is in hundreds of dollars. How many bicycles should the shop build to minimize the average cost per bicycle?
I don't know where to begin with this problem, can someone please help me with it? I would really appreciate it.
Click here to see answer by vleith(2825)

Question 184126: An orange grower finds that she gets a yield of 40 bushels of oranges per tree when she plants 20 trees on an acre of ground. However, the yield decreases by 1 bushel per tree for each additional tree she plants on the acre due to crowding. How many trees should she plant per acre to maximize her yield?
Click here to see answer by stanbon(57282)

Question 184021: For each part, write a quadratic equation that has the indicated solutions. x = 0.5 amd x = 2/3
Click here to see answer by ankor@dixie-net.com(15645)

Question 184167: solve for x
x^2-7=0
Click here to see answer by vleith(2825)

Question 184181: Solve and show steps by factoring:
x^2-9x=-20

Click here to see answer by solver91311(16872)

Question 184182: Solve and show steps using the square root property:
(x+8)^2=81

Click here to see answer by solver91311(16872)

Question 184186: Solve and show steps using the quadratic formula:
3x^2-2x=15x-10
Click here to see answer by jim_thompson5910(28536)

Question 184187: Solve using the quadratic formula:
x^2-3x-23=5
Click here to see answer by jim_thompson5910(28536)

Question 184211: Answers should be written in sentence form. Explanations must be detailed and well-thought out. Include examples wherever possible.
4. Alyssa multiplies both equations in a linear system by 10 to eliminate the decimal. She determines that x=3 and y=2. She then divides her results by 10 to get a solution of (0.3, 0.2). Is her reasoning correct? Explain.
Please and thank you very much!!!!
Click here to see answer by rapaljer(4667)

Question 184208: Answers should be written in sentence form. Explanations must be detailed and well-thought out. Include examples wherever possible.
1.a) Describe the graph of a linear system that has one solution, no solution and infinitely many solutions.
Please and thanks.
Click here to see answer by rapaljer(4667)

Question 184226: Solve each equation and show steps!
x^3+x^2=0
Click here to see answer by jim_thompson5910(28536)

Question 184226: Solve each equation and show steps!
x^3+x^2=0
Click here to see answer by stanbon(57282)

Question 184272: Write an equation in standard form using only integers for the line described.
The line with slope -4, going through (-6, 0)
Click here to see answer by Alan3354(30993)

Question 184230: please help me solve each system of equation
1.) y=3x-4 2.) x-2y=-14 3.) x+2y=4 4.) 3x-y=2
y=-2x+1 y+2x=4 2x+y=-1 y=2x-5
and whats the solution??
Click here to see answer by jeselle(2)

Question 184305: How do I find the solution to this x^2-16=0
How do I find to the solutions this x^2+16=-64
How do I solve for X x^2+6x+5=0
How do I factor completely 4s^-49
How do I factor completely x^2+5x+6
How do I find the solutions x^2+3x=0
How do I factor completely 3x^2+5x-3
Thank you for your help

Click here to see answer by stanbon(57282)

Question 184210: Answers should be written in sentence form. Explanations must be detailed and well-thought out. Include examples wherever possible.
3. Explain why you might need to multiply each equation by a different number when solving a system of equations by ELIMINATION.
Please and thank you very much.
Click here to see answer by stanbon(57282)

Question 184373: what is the wingspan of a bird weight 1.30 pound, if I use the rational exponent euation L= 2.43* W^0.3326 to estimate the wingspan L in feet of the bird"s weight.
I start of like this
L = 2.43* w^0.3326
L = 2.43* 1.30^0.3326
L =
I get stuck at this part
Click here to see answer by checkley77(12569)

Question 184397: Use the quadratic formula to solve the equation:
3x^2-38x=101
a) 19+[664]/3
b) -19+[664]
c) 19-[58]/3
d) 19+[664]/6
e) 19+[58]/3
f) 19-[664]/3
Hint: the [] stands for square root signal. And there is a chance it may be more than one answer!

Click here to see answer by solver91311(16872)

Question 184421: Show steps and solve by using the square root property:
5x^2=100

Click here to see answer by Alan3354(30993)

Question 184449: Solve using the square root property:
(x+8)^2=81
Click here to see answer by stanbon(57282)

Question 184449: Solve using the square root property:
(x+8)^2=81
Click here to see answer by jim_thompson5910(28536)

Question 184449: Solve using the square root property:
(x+8)^2=81
Click here to see answer by josmiceli(9664)

Question 184447: Solve by factoring
x^2-9x=-20
Click here to see answer by edjones(7569)

Question 184469: Give the equation of the axis of symmetry of y = -x^2 - 3x - 5.
Click here to see answer by stanbon(57282)

Question 184476: Solve the following application problem (show your equation and then your solution). Round answers to nearest thousandths and properly label your answer as well.
The length of a rectagle is 5 cm. more than its width. If the area of the rectange is 90 cm^2, find the dimensions.

Click here to see answer by checkley77(12569)

Question 184474: Give the x-intercepts for the following quadratic equation:
y = x^2 - 2x - 3

Click here to see answer by checkley77(12569)

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