Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 171867: c^2-6c=0 how do you solve this quadratic equation?
Click here to see answer by jim_thompson5910(28476)

Question 171875: how do you find the number of real solutions for this equation: x^2-10x+25=0?
Click here to see answer by jim_thompson5910(28476)

Question 171875: how do you find the number of real solutions for this equation: x^2-10x+25=0?
Click here to see answer by stanbon(57214)

Question 171876: how do you simplify
the square root of 4x^2y^2?
Click here to see answer by jim_thompson5910(28476)

Question 171872: how do you use the quadratic formula to solve 5y^2+5y=9? please round to the nearest hundreth
Click here to see answer by jim_thompson5910(28476)

Question 171881: The volume of water at a given time in a 2000L tank is respesented by the formula V=2000(1- t/45)^2, where t is the time in minutes. Determine the average rate of change in the volume of water in the tank from minute 0 to minute 10, and use it to describe how the volume of water in the tank is changing during that time.
Click here to see answer by stanbon(57214)

Question 171899: Can someone show me step by step how to solve this equation. thank you much in advance..
If x = 1 and x = -8, then form a quadratic equation

thank you!!!!
Click here to see answer by jim_thompson5910(28476)

Question 171873: how do you solve 11x^2=27? round to the nearest hundreth
Click here to see answer by Alan3354(30939)

Question 171868: how do you use the quadratic formula for 2a^2 - 46a + 252 = 0? please round to the nearest hundreth
Click here to see answer by Alan3354(30939)

Question 171868: how do you use the quadratic formula for 2a^2 - 46a + 252 = 0? please round to the nearest hundreth
Click here to see answer by jim_thompson5910(28476)

Question 171877: The roots of x^2+kx+9=0 are real and equal. What are the possible values of k???
Click here to see answer by monika_p(71)

Question 171896: Can someone put me on the right track I came up with 3 solution and I don't think my answer is right please help thank you..
Determine whether the following equation have a solution or not? please justify the answer.
(3)1/2 y^2 - 4y -7 (3)1/2 = 0

And can you show me on this one too thank you so much
z^2 + z + 1 = 0

thank you much much!!!!!
Click here to see answer by Alan3354(30939)

Question 171916: Solve by completing the square
3x^2+5x-1=0
Click here to see answer by jim_thompson5910(28476)

Question 171916: Solve by completing the square
3x^2+5x-1=0
Click here to see answer by josmiceli(9645)

Question 171912: Find the vertex for the graph of the quadratic function.
(f)x= x^2 -13
Click here to see answer by jim_thompson5910(28476)

Question 171912: Find the vertex for the graph of the quadratic function.
(f)x= x^2 -13
Click here to see answer by checkley77(12569)

Question 171883: A rectangular swimming pool has the length 30 m and width 20 m . There is a deck of uniform width surrounding the pool. The area of the pool is the same as the area of the deck. Write the quadratic equation to model this situation and use it to determine the width of the deck.
Click here to see answer by checkley77(12569)

Question 171926: A bakery sells cheesecakes having diameters 6 in, 8 in, 10 in; all the same height. Suppose that they cost $8, $12, and $20 respectively.
A. Which size gives you the most cheesecake per dollar?
please explain.
B. Find a quadratic equation that models how the ocst of a cheesecake varies with diameter.
I would appreciate any help I can get.
Please help soon!
Click here to see answer by Mathtut(3670)

Question 171938: Find A quadratic Model for each set of values:
(-1,1), (1,1), (3,9)
Click here to see answer by Alan3354(30939)

Question 171941: you are given a polynomial equation and one or more of its roots. Find the remaining roots.
19. 2x^3 - 5x^2 - 4x + 3=0 ; root : x=3
please explain solutions
I would really appreciate any help
please help soon
Click here to see answer by stanbon(57214)

Question 171940: when P(x) us divided by 2x+1; the quotient is x^2 - x + 4 and the remainder is 3. Find P(x)
Please explain step by step
I would really appreciate any help
please help soon!
Click here to see answer by stanbon(57214)

Question 171939: show that x-a is a factor of x^n - a^n for any positive integer n
could you please show step by step
I would really appreciate any help!
please help soon.
Click here to see answer by stanbon(57214)

Question 171935: tutors I really need you all to explain to me how to solve this problem
which of the following are factors of P(x)= x^3 - 5x^2 + 3x + 9
a. x-1
b. x+3
c. x-3
I would appreciate any help I can get!

Click here to see answer by edjones(7569)

Question 171930: suppose that an object is thrown into the air with an intial upward velocity of vo meters per second from a height ho meters above the ground. Then t seconds later, its height h(t) meters above the ground is modeled by the function
h(t)= -4.9 t^2 + vot + ho. (this model dosent' account for resistance)
given that information, the question is:
One half second after springing from a high diving board, a diver reaches her highest point above the water, 4.225 m. If the diving board is 3 meters above the water, how long is the diver in the air?
I would really appreciate any help I can recieve on this problem.
please help soon, thanks!
Click here to see answer by ankor@dixie-net.com(15622)

Question 172064: use the quadratic formula to solve for this equation: 2a^2-46a+252=0
i dont get that can you please help :)
Click here to see answer by Alan3354(30939)

Question 172074: 5 the square root of 25x^7? i really dont get how to simplify
Click here to see answer by stanbon(57214)

Question 172073: how and when would you use the "discriminant"?
Click here to see answer by solver91311(16868)

Question 172071: 5 the square root of 25x^7
how do you simplify that?
Click here to see answer by Mathtut(3670)

Question 172085: 1. y>x^2-8x+17=

Click here to see answer by Alan3354(30939)

Question 172070: what is 11x^2=27 i dont really get how to do that
Click here to see answer by Alan3354(30939)

Question 172099: The height h in feet of an object after t seconds is given by the function
h = –16t² + 30t + 8.
How long will it take the object to hit the ground? Round your answer to the nearest thousandth.

Click here to see answer by solver91311(16868)

Question 172096: Solve by using the quadratic formula.
3x² = 11x + 4
3x^2-11x-4 11+/- squareroot (-11)^2-4(3)(-4)/2(3)
11+/- squareroot 121+48/6
11+/- 13/6
24/6= 4 or -2/6= -1/3

Click here to see answer by Difficulty(2)

Question 172095: Solve. x2 – 75 = 0

Click here to see answer by Alan3354(30939)

Question 172109: Here is the problem: y=-2x^2+8x-5
Here is what I tried:
h=-(8/2(-2))
-2(2)^2-8(2)-5
-8-16-5
...
This doesn't make sense, because the y value seems too large.
Am I doing this problem correctly?
Thanks!

Click here to see answer by Alan3354(30939)

Question 172108: -16t² + 30t + 8 = 0
Click here to see answer by Alan3354(30939)

Question 172103: how do you simplify the square root of 9x^5y^5/16x^6??
Click here to see answer by Mathtut(3670)

Question 172093: Solve by completing the square.
x2 – 2x – 63 = 0

Click here to see answer by Mathtut(3670)

Question 172100: 1. Determine whether the following equations have a solution or not? Justify your answer.
a) x2 + 6x - 7 = 0
b) z2 + z + 1 = 0
c) (3)1/2y2 - 4y - 7(3)1/2 = 0
d) 2x2 - 10x + 25 = 0
e) 2x2 - 6x + 5 = 0
f) s2 - 4s + 4 = 0
g) 5/6x2 - 7x - 6/5 = 0
h) 7a2 + 8a + 2 = 0
2. If x = 1 and x = -8, then form a quadratic equation.
3. What type of solution do you get for quadratic equations where D < 0? Give reasons for your answer. Also provide an example of such a quadratic equation and find the solution of the equation.
4. Create a real-life situation that fits into the equation (x + 4)(x - 7) = 0 and express the situation as the same equation.

Click here to see answer by solver91311(16868)

Question 172163: 7a2 + 8a + 2 = 0 I have done most of the problems and this is the last one can you help me please....
Click here to see answer by jim_thompson5910(28476)

Question 171929: suppose that an object is thrown into the air with an intial upward velocity of vo meters per second from a height ho meters above the ground. Then t seconds later, its height h(t) meters above the ground is modeled by the function h(t)= -4.9 t^2 + vot + ho. (this model dosent' account for resistance)

if a stone is thrown with an upward velocity of 14 m/s from a cliff 30 meters high
I answered part a which asked:
a. find its height above the ground t seconds later.
h(t)= -4.9t^2 + 14 t + 30
I don't understand part b or c
b. when will the stone reach it's highest elevation
c.when will the stone hit the ground?
I would really appreciate any help I can recieve.
Thank you very much
please help soon!
Click here to see answer by ankor@dixie-net.com(15622)

Question 172191: please help me solve this equation:
Click here to see answer by jim_thompson5910(28476)

Question 172246: Find the x-intercepts.
y = x^2 + 4x - 1
Click here to see answer by KnightOwlTutor(293)

Question 172320: Solve using the quadratic formula: 25x^2+30x+9=0
I do not understand this at all, please help :)
Click here to see answer by Alan3354(30939)

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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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