Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 271454: The equation is (2y + 1/2)^2 = 4/25. I divided the first half of the equation by 2 to get the variable alone, so my new equation is (y + 1/4)^2 = 4/25. I squared both sides, ending up with y + 1/4 = 2/5. My final answers were 13/20 and -3/20, not the answers in the book. Please help me find my error. Thank you!!
Click here to see answer by scott8148(6628)

Question 270067: Combine like terms where possible. 8y^4 - 3y^4
Click here to see answer by Alan3354(31532)

Question 271528: please help me solve for X
2X-2 + 1/5X + 4 = 90
Click here to see answer by andriana121(7)

Question 271639: Jack usually mows his lawn in 3 hours. Marilyn can mow the same lawn in 5 hours. How much time would it take for them to mow the lawn together?
Click here to see answer by mananth(12270)

Question 271677: Find all numbers for which the rational expression is undefined:
s^3-9s/s^2-4
Please explain the answer.
PLEASE HELP!!!
Click here to see answer by nerdybill(7008)

Question 271674: Find the following. Assume that variables can represent any real number.
sqrt:(a+2)^2=???
PLEASE HELP!!!!!
Click here to see answer by checkley77(12569)

Question 271699: Area of a painting. A rectangular painting with a width of x centimeters has an area of x^2 +50x square centimeters. Find a binomial that represents the length.
Click here to see answer by richwmiller(9144)

Question 271673: If a pro basketball player has a vertical leap of about 30 inches, what is his hang time? Use the hang-time function V=48T^2
PLEASE HELPPPP!!!!
Click here to see answer by Theo(3504)

Question 271680: If the sides of a square are lengthened by 6cm, the area becomes 144cm^2. Find the length of a side of the original square.
Please explain answer. Thanks!
Click here to see answer by ankor@dixie-net.com(15746)

Question 271920: Write a quadratic equation in the variable X having the given numbers as solutions. Type the equation in standard form of ax^2+bx+c=0.
Solution: 1, only solution
The equation is _____________ =0
Thanks so much for your help :-)
Click here to see answer by jsmallt9(3296)

Question 271852: A machine produces 30 articles in t hours. If the machine were to produce 5 more articles each hour, it would take half an hour less to produce 30 articles. Find t.
Click here to see answer by jsmallt9(3296)

Question 271959: A ball is dropped from a height of 64 feet. Its height above the earth in feet is given by h(t)=-16t^2+64, where t is the number of seconds after it is dropped.
Find h(1).
How long does it take the ball to fall to the earth?
Click here to see answer by stanbon(57977)

Question 271963: find the value of x
4xx+12x+9
Click here to see answer by palanisamy(496)

Question 271628: How do you find the standard form, vertex, line of symmetry, and maximum or minimum values, and square the equation?
f(x)=x^2-2x-3
Click here to see answer by ankor@dixie-net.com(15746)

Question 271980: Use the graph of y = x2 – 6x to answer the following: I am not able to put the graph

a) Without solving the equation (or factoring), determine the solutions to the equation x2 – 6x = 0 using only the graph.

Answer: X=0,60 and Y=30,-90
Explain how you obtain your answer(s) by looking at the graph:
I picked the points on the graph
b) Does this function have a maximum or a minimum?
Answer:
Explain how you obtain your answer by looking at the graph:

c) What is the equation of the line (axis) of symmetry for this graph?
Answer:

d) What are the coordinates of the vertex in (x, y) form?
Answer:

Click here to see answer by Earlsdon(6294)

Question 272122: State whether the given equation represents a linear, quadratic, or exponential function. Tell how you decided.
y = -8x2 + 4

Click here to see answer by palanisamy(496)

Question 272121: Evaluate and tabulate the values of y for the value(s) given.
y = 2x3, for x = -3, 0, 1, 4

Click here to see answer by palanisamy(496)

Question 271999: Find the possible values of r in this equation
r^2 -7r -8=0
Click here to see answer by jsmallt9(3296)

Question 271993: Find the value of y in the quadratic equation
y^2 +4y +4 =7
Click here to see answer by jsmallt9(3296)

Question 271340: solve
(x+11)(x-18)(x+8)>0
Click here to see answer by jsmallt9(3296)

Question 272154: Okay so I'm learning about rational functions in my 9th grade algebra class. I'm having trouble graphing y=4(1/x) from the y=x form, no it is not a parabola.
I know that 4 is the vertical stretch, but I don't know where to start to begin graphing it.
How do you vertically graph y=4(1/x)?
Click here to see answer by richwmiller(9144)

Question 272157: subtract and simplify
5xsqrt18-6xsqrt2
Click here to see answer by oberobic(2304)

Question 272371: How can i solve x^2-18x-40=0 by factoring?
Click here to see answer by Alan3354(31532)

Question 272459: write a quadratic equation with integral coefficients and roots equal to 2/3 and -1/2
Click here to see answer by oberobic(2304)

Question 272468: Solve for x.
3x^2= -17x-10
Click here to see answer by dabanfield(803)

Question 272571: Find the roots of the quadratic equation x2 − 18x + 18 = 0 .
Click here to see answer by oberobic(2304)

Question 272711: If k is the constant in the expression x^2 – x + k and the expression has a
value of 0 when 3 is substituted for x, what is the value of the expression when 2 is substituted for x?
(A) -4 (B) -2 (C) 6 (D) 8 (E) Cannot be found.
Click here to see answer by stanbon(57977)

Question 272837: what is the quadriatic factor of : 108x^2-75

Click here to see answer by scott8148(6628)

Question 272913: solve by using the quadratic formula
x2+5x-36=0
Click here to see answer by checkley77(12569)

Question 272913: solve by using the quadratic formula
x2+5x-36=0
Click here to see answer by lavleen(1)

Question 272938: Please help me solve this equation:
I need to find the x intercept and the y intercept and also the vertex. I am struggling mostly with finding the x intercept.
Click here to see answer by stanbon(57977)

Question 272909: solve by using the quadratic formula
x2-4x-8=0
Click here to see answer by bobdabuildr(27)

Question 272996: 9.3 / 10^5
Click here to see answer by persian52(158)

Question 273005: How do I find a root of the equation 2x^2-x-15=0
ALSO
How do I find the x coordinate of the vertex for the quadratic equation x^2+6x+5=0

Thanks(:
Click here to see answer by stanbon(57977)

Question 272940: Please help me solve this equation:
I need to find the x intercept and the y intercept and the vertex.
Click here to see answer by persian52(158)

Question 273018: What is the standard form of an quadratic formula? thanks
Click here to see answer by persian52(158)

Question 273019: i need to write a 10 page illustrated childrens book that explains how to solve a quadratic equation by factoring

Click here to see answer by persian52(158)

Question 273052: What are the factores of this equation. I think I know the answer but I want to make sure I am doing this right.
4b^2 -16
Click here to see answer by Edwin McCravy(8999)

Question 273056: what are the factors of this equation
m^2 -14m +48
Click here to see answer by stanbon(57977)

Question 273064: p^2 +13p -30 =0
Click here to see answer by stanbon(57977)

Question 273064: p^2 +13p -30 =0
Click here to see answer by Alan3354(31532)

Question 273062: what are the two binomial factors of
6s^2 +40s -64
Click here to see answer by stanbon(57977)

Question 273059: what are the factors.
t^4 -81
Click here to see answer by persian52(158)

Question 273093: write an equation in standard form of the quadratic function that has a vertex (3,4) and whose graph passes through the poing (-1,-6)
Click here to see answer by solver91311(17077)

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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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