Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 927731: I need to find the y and x intercepts of y=-2x^2-8x-5
Thank you in advance
Click here to see answer by MathLover1(20849)

Question 927730: Hello....I have 2 questions
1) y=x^2-6x+4 use quadratic formula to find the values of zeros.
Can someone help me with this? I believe I have found the vertex (3,-5) hoping this is correct?
2) Find the y and x intercepts of 2x^2-2x-12
Thank you!!
Click here to see answer by rothauserc(4718)

Question 927772: Find the sum of the cubes of the roots of , but do not find the roots.
Click here to see answer by MathLover1(20849)

Question 927772: Find the sum of the cubes of the roots of , but do not find the roots.
Click here to see answer by Edwin McCravy(20054)

Question 927857: Hi, I'm struggling with this question on a past paper:
A curve has equation y = 2x^2 - x - 1 and a line has equation y = k(2x -3) , where
k is a constant.
The x-coordinate of any point of intersection of the curve and the line satisfies the equation
2x^2 - (2k +1)x + 3k - 1 = 0
The curve and the line intersect at two distinct points.
Show that 4k^2 - 20k + 9 > 0.
If someone would be able to explain the steps needed that would be great, as I'm drawing a complete blank on this.
Many thanks,
R
Click here to see answer by jim_thompson5910(35256)

Question 927889: I'm not sure that I picked the right category but my question is 10x=9. What is x?
Click here to see answer by rothauserc(4718)

Question 927912: I'm struggling a lot with this one...I am so lost...
Put equation in this form y=ax^2+bx+c
Vertex (4, -1) passes through (2, 3)
Click here to see answer by Techpriest(29)

Question 927931: Evalaute the expression. write the answer in standard form.
(-2x10^-5)(2x10^4)
Click here to see answer by MathLover1(20849)

Question 928028: Write a quadratic equation in the variable x having the given numbers as solutions.Type the equation in standard form.
The solutions are -3,1
Click here to see answer by ewatrrr(24785)

Question 928029: Write a quadratic equation in the variable x having the given numbers as solutions.Type the equation in standard form.
Solution 9 only solution.
Click here to see answer by ewatrrr(24785)

Question 928032: Write a quadratic equation in the variable x having the given numbers as solutions.Type the equation in standard form.
Solutions -radical 5, 7 radical 5
Click here to see answer by ewatrrr(24785)

Question 928342: x^2+6x+3=0 solve for x using the quadratic formula, write your answer in simplest radical form and also give the answer to the nearest tenth.
Click here to see answer by MathLover1(20849)

Question 928514: H^-1(30)=30 m-2 kg-1 s2 A2
Click here to see answer by ahenkemeyer(12)

Question 928595: My overall grade is a 80B. Our final weighs 30% . Whats the lowest I can make and still pass with a C 79-70?

Click here to see answer by Alan3354(69443)

Question 928655: 7 to the power of 2+1-5x3=135 but where do you put the parentheses?
Click here to see answer by richard1234(7193)

Question 928869: Domain of y=√2x+3
Click here to see answer by ewatrrr(24785)

Question 928874: H(t)=85+128t-16t^2
A) complete the square
B) what is the objects max height?
Click here to see answer by ewatrrr(24785)

Question 928877: Find the value of k for the equal equation (k+4) x+(k+1) x+1=0has equal roots

Click here to see answer by MathLover1(20849)

Question 928946: (5m-n+1) - (10-m-n)
5m-m= 4m?
5+10= 15?
Click here to see answer by rothauserc(4718)

Question 928947: 12 : m= 75 : 40
I think you multiply 12 by a number and then divide it by another, but I'm not sure what number to do first.
Click here to see answer by rothauserc(4718)

Question 928959: The equation which represents x, the width of the border is 2(8-2x)+2(4-2x)=18. What is the width of the border?
Click here to see answer by ewatrrr(24785)

Question 928959: The equation which represents x, the width of the border is 2(8-2x)+2(4-2x)=18. What is the width of the border?
Click here to see answer by MathLover1(20849)

Question 928914: One number is equal to the square of another. Find the numbers if both are positive and their sum is 1482.
Click here to see answer by TimothyLamb(4379)

Question 929129: Please help me solve this problem:
Use the discriminant to find the number of solutions for:
x^2-3x+4
Click here to see answer by Alan3354(69443)

Question 929218: Determine the quadratic function with the given information.
Given: vertex (3,-7) and y-intercept of -4
Answer in the form y=a(x-h)^2+k
Click here to see answer by josgarithmetic(39616)

Question 929239: Write the equation of a quadratic whose roots are -3/7 and 2/5. Answer without fractions.
Click here to see answer by TimothyLamb(4379)

Question 929279: Solve the following using the quadratic formula. Answer in the simplest exact values.
5x^2-11=0
Click here to see answer by ewatrrr(24785)

Question 929354: The length and width of a rectangle are 7m and 5m, respectively. When each dimension is increased by the same amount, the area is tripled. Find the dimensions of the new rectangle to the nearest tenth of a meter.
Click here to see answer by ewatrrr(24785)

Question 929409: An airplane travels 600 miles against the wind in 4 hours, and makes the return trip with the same wind in 2 hours. Find the speed of the wind.
Click here to see answer by TimothyLamb(4379)

Question 929411: Solve using the elimination method. Use a graphing calculator to check your answers.
8x-5y=77
-6x-3y=-51

The answer they got was (9,-1) How did they get this?
Click here to see answer by TimothyLamb(4379)

Question 929554: The length of a rectangle is 6 more than two times a number. The width is the number plus three and the area is 32. What is the width of the rectangle?

Click here to see answer by sunny1992(35)

Question 929693: Please help me to to solve this quadratic equation word problem.
Metal Fabrication. A square piece of tin, 12 inches on a side, is to have four equal squares cut from its corners. If the edges are then to be folded up to make a box with a floor area of 64 square inches, find the depth of the box.
Click here to see answer by josgarithmetic(39616)

Question 929788: so i need help on determining the number of the equation y=-2x[squared]+32
i know the formula is -b[squared]-4(a)(c) but in this situation i dont have (a) so would i put 0 or 1 into the equation
Click here to see answer by josgarithmetic(39616)

Question 929689: Please help me to to solve this quadratic equation. Solve each equation in part A using factoring. Solve the equation in part b by completing the square
Part A. 8x^2 +2x - 3 = 0
Part B. 8x^2 +2x - 2 = 0

Click here to see answer by ewatrrr(24785)

Question 930027: Factoring the difference of two squares.
Factor, write prime if prime.
-x^2 + 16
Click here to see answer by MathLover1(20849)

Question 930034: Factoring the difference of two squares.
Factor, write prime if prime.
-98 + 2x^2
Click here to see answer by MathLover1(20849)

Question 930031: Factoring the difference of two squares.
Factor, write prime if prime.
a^2b - b^2
Click here to see answer by MathLover1(20849)

Question 930050: Please help me solve the following per step. Thanks!
For the quadratic function: f(x)=x^2-4x-5 find:
a) y-intercept
b) x-intercept(s)
c) the vertex
d) f(6)
Click here to see answer by ewatrrr(24785)

Question 930056: Please show me each step to solve this by using the quadratic formula. Thanks!
2x^2 -3=-5x
Click here to see answer by ewatrrr(24785)

Question 930356: a. Write a quadratic function to represent to area of all rectangles with a perimeter of 36 feet.
b. What is the vertex?
c. How can the graph of your function and the vertex help you determine which rectangle has the area? What are the side lengths for the rectangle with the greatest area?
Click here to see answer by Fombitz(32388)

Question 930353: Write a quadratic function to represent to area of all rectangles with a perimeter of 36 feet.
Click here to see answer by Fombitz(32388)

Question 930645: 4. A model for a company's revenue from selling a software package is R = -2.5p2 + 500p, where p is the price in dollars of the software.
a. What price will maximize the revenue? Give a reason for your answer.
b. What is the maximum revenue? Give a reason for your answer.
Click here to see answer by TimothyLamb(4379)

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