Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 340918: what will be the perimeter of a quadrilateral if one sideis55cm,50cm,12cm abis parallel to cd
Click here to see answer by solver91311(24713)

Question 340916: Use complete sentences to explain how you would use graphing technology to find the solutions of 0 = −x^2 + 2.5x + 1. What do the solutions of 0 = −x2 + 2.5^x + 1 represent on the graph of the equation?
Click here to see answer by solver91311(24713)

Question 341023: I need help solving this problem. I keep getting the wrong answer. 5=.0002x^2-.316x+127.9. If you could help I would greatly appriciate it.
Click here to see answer by Alan3354(69443)

Question 341240: modeling and solving problems with quadratic equations problem
"your big-screen tv measures 50 inches on the diagonal. if the front of the TV measures 40 inches across the bottom, find the height of the TV."
Click here to see answer by fractalier(6550)

Question 341236: the sail on a sailboat is in the shape of a triangle. if the height of the sail is 5 times the length of base and the area is 160 square feet, find the dimensions of the sail.

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Question 341559: f(x)=x^2-7x-8

What is the vertex, the line of symmetry, and the x and y intercept(s)? How do you find each one?
Thanks!
Click here to see answer by stanbon(75887)

Question 341595: I need help solving x^2+20x=6
I know the formula should be x^2+bx but I need help understanding how to complete the square.
Click here to see answer by Fombitz(32388)

Question 341749: I need to find the vertex and axis of symmetry to graph the quadratic form, I understand how to graph quadratic forms but the fraction in this specific problem has me all jumbled up. I tried solving it and got x= 9/4 for the axis of symmetry and (9/4,87/16)for the vertex but im almost 100% certain that is wrong. I would really appreciate some help (PLEASE HELP ME). Thanks in advance.
-Kay
Click here to see answer by jim_thompson5910(35256)

Question 341747: Is "g(x)" the same thing as "y" at the end of an equation? I know it is a silly question but you can never be too sure, thanks in advance.
Click here to see answer by jim_thompson5910(35256)

Question 341742: the length of a rectangle is twice the width. the area is 392 yd^2. find the length and the width
Click here to see answer by checkley77(12844)

Question 341739: I need to solve this problem in quadratic form.
x^2/5 -5x^1/4-3=0
Click here to see answer by Fombitz(32388)

Question 341774: Sorry you are right I did not type it in correctly. I do need to solve it in quadratic form
X^2/5-x^1/5-2=0
Sorry!
Click here to see answer by stanbon(75887)

Question 341846: Determine the nature of the solutions of the equation. 2t^2-7t=0 Are there 2 imanginary solutions, 2 real solutions, or 1 real solution?
Click here to see answer by Fombitz(32388)

Question 341851: The length of a rectangle is twice the width. The area is 8yd^2. Find the length and the width.
The length is ____yd
The width is _______yd
Click here to see answer by mananth(16946)

Question 341847: Determine the nature of the solutions of the equation. 2t^2-7t=0. Are there 2 imaginary solutions, 2 real solutions, or 1 real solution?
Click here to see answer by mananth(16946)

Question 341886: determine the nature of the solutions of the equation. x^2-2=0
Click here to see answer by Jk22(389)

Question 341895: I think this is the right topic. I need help with my Quadratic sequences homework, as I have a very bad teacher, and nearly no one in my class understands what he says.
I need help in finding the nth term for these sequences:
a)7,8,10,13,17
b)2,3,5,8,12
c)1,3,7,13,21
d)5,8,14,23,35
Please help, and if you could show your workings, that would help me a lot.
Click here to see answer by stanbon(75887)

Question 341980: I know that the fomula x= -b/2a is used to solve for the minimum/maximum value of a quadratic formula but what happens when the quadratic formula is a= -6 b=0(?) c= -1. I know that the maximum value= -1 but I dont understand how to solve for it. Please Help Me. Thanks in advance for your help and glorious time.
- Kay
Click here to see answer by jim_thompson5910(35256)

Question 341782: Can you assist me with the following question?
I need to find the x-intercepts for the following equation: y=x^2+4.
Click here to see answer by scott8148(6628)

Question 342213: Give the exact and approximate solutions to three decimal places.
y^2-10y+25=100
equation is ax^2+bx+c I believe ??? I am confused because there are y's and 10 is negative...
Click here to see answer by stanbon(75887)

Question 342189: What are two numbers that when added equal -150 and when multiplied equal 3600?
Click here to see answer by Alan3354(69443)

Question 342212: Solve for x.
2x^2=-13-15
it is not 2*x as well. It is 2x to the second power. would you subtract 15 or use the quadratic equation??? stuck!!
Click here to see answer by Alan3354(69443)

Question 342211: how to find a= b= c= from -2t =-8
^
to the second power
Click here to see answer by Fombitz(32388)

Question 342298: Solve by factoring: 35x + 19 = 3(x^2 - 3)
Click here to see answer by Fombitz(32388)

Question 342311: If a^2 + b^2 = a^2 - 2ab + b^2, then which of the following must be true?
(A) a = 0 (B) b = 0 (C) a = 0 or b = 0 (D) a = 0 and b = 0
(E) cannot be determined from the given information
Click here to see answer by Fombitz(32388)

Question 342221:
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Question 342387: x+4/x+2=7/x+2 + 24/x^2-4
Find all the real solutions
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Question 342464: Determine the nature of the solutions of the equation.
x^2-14x+49=0
What does the equation have?
One real solution, two non-real solutions, or two real solutions
Click here to see answer by Fombitz(32388)

Question 342463: solve for x. x^2+18x+4=0
Click here to see answer by vleith(2983)

Question 342472: Solve 4x^2=20
Find the x-intercepts of f(x)=4x^2-20.
What are the solutions? x=?(type an exact answer, using radicals as needed. rationalize all denominators. express complex numbers in terms of i. use a comma to separate answers.
What are the x-intercepts? or are there no x-intercepts?(type an ordered pair. type an exact answer, using radicals as needed. rationalize all denominators. use a comma to separate answers as needed.
Click here to see answer by Fombitz(32388)

Question 342492: How do you find a, b, and c of the equation y=ax2+bx+c?
Click here to see answer by Fombitz(32388)

Question 342611: Please help:
Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0.
+sqrt2,5sqrt2
Click here to see answer by solver91311(24713)

Question 342617: Graphing a parabola exercise
o Choose a graphing program to work with, either Excel or Graph. See Graphing Instructions in Course Materials Forum. Begin by opening a Word document that will contain the graph. Using the chosen software plot these 4 points on one graph and label each point with its coordinates. (0,-8), (2,10), (-2,-10). Enter as a separate Point Series if using Graph: (-1.25,0).
o The next step (added to the previous graph) is to graph the vertical line x = -1.25. Label this line as the Axis of Symmetry.
o Graph the Parabola: Using GRAPH: Right click on the Point Series of the 3 points on the parabola; select Insert Trendline; select Polynomial; select line color and style. Using Excel: Select line or arrow from toolbar; select line color, style, and thickness. Complete labeling and indicate the vertex and intercepts
Click here to see answer by solver91311(24713)

Question 342738: in ax^2+bx+c form, what is x^2+4x+8=5x+18
Click here to see answer by jim_thompson5910(35256)

Question 342883: please help me solve this equation
Click here to see answer by nyc_function(2741)

Question 342559: find the quadratic model ofr each set of values.
(-1,-1),(1,-3)(2,8)
Click here to see answer by Fombitz(32388)

Question 342988: the are of a rectangle is 144in^2. the length is 4 times great than the width. Which quadratic equation represents the are of the rectangle?
a)w(4w)=144
b)w(4-w)=144
c)w(w-4))=144
d)w(w+4)=144
Click here to see answer by jim_thompson5910(35256)

Question 342947: 7x - 34 = 5/x
Click here to see answer by Fombitz(32388)

Question 342607: Please help:
What is the solution for x^2+7x-4=0?
What are the x intercepts for:
f(x)=x^2+7x-4
Click here to see answer by Fombitz(32388)

Question 343210: how do u draw a gragh for the quadratic equation?
Click here to see answer by Alan3354(69443)

Question 343204: what does the word discremation mean? and the formula?
Click here to see answer by Alan3354(69443)

Question 343276: 5x2 = -10x - 2
Click here to see answer by edjones(8007)

Question 343315: how do I figure this problem out -3/x = x/-3
Click here to see answer by mananth(16946)

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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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