Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 104635: solve the following equation for x
2x^2-4t+4=6
Click here to see answer by rahul(6)

Question 105586: Problem. Identify the axis of symmetry, create a suitable table of values and sketch the graph. The problem is y=x^2-5x+3. I've identified the axis of symmetry as 5/2 but I am having difficulty creating the table of values. Any assistance would be greatly appreciated.
Click here to see answer by MathLover1(6611)

Question 105695: 3x^2+17x+45=12
Click here to see answer by Fombitz(13828)

Question 105812: Please Help. I have a textbook and it takes me through the steps on what I need to do, but I still do not understand exactly why I need to do all these steps. My problem does not come from a textbook that I know of. I only havce the text for guidance. This is my problem: solve quadratic equation by using quadratic formula. x^2-x-6=0 This is what I have done so far, but I know it is not correct. x^2-x-6+6=0+6 x^2-x=6 x=6 If you could help I would greatly appreciate it. And I thank you for your time.
Click here to see answer by Fombitz(13828)

Question 105663: I NEED SOME HELP WITH SOME PROBLEMS ON QUADRATIC EQUATIONS....
1) (2+X)SQUARED=49
2) (X+2)(3X-4)=(X+5)(2X-5)
3)CAN NOT TELL IF THE EQUATION IS RATIONAL OR IRRATIONAL...8XSQUARED=14X-3
4)S=SO+GTSQUARED+K FOR T WITH THE DENOMINATOR OF 0

Click here to see answer by MathLover1(6611)

Question 105885: Ok, I don't know where to go to solve a formula help, so is anyone able to help solve the following formula for me? I am going crazy here.
Solve the Formula D=1/8 s i for the variable s? Thank you very much!
Click here to see answer by edjones(7569)

Question 105856: word problems-quadratic equation
Students sent flowers costing $20 to a sick classmate. There were four fewer students contributing than was planned, requiring each of the others to give 25 cents more. How many students contributed to the gift?
Click here to see answer by scott8148(6628)

Question 105857: word problem-quadratic equation
Three pieces of rod measure 20 cm, 41 cm and 44 cm. If the same amount is cut off each piece, the remaining lengths can be formed into a right triangle. What length is cut off?
Click here to see answer by scott8148(6628)

Question 105940: how do you solve 11x(16x-12)=0 using the null factor law

Click here to see answer by scott8148(6628)

Question 105927: word problems-quadratic equation
A storeowner buys a quantity of balls for $600. If they had each cost $0.25 less, she would have had 10 more for the same money. How much did she pay for each ball??
pls help me! anyone?? just set up the formula for me.. tnx. =D
Click here to see answer by scott8148(6628)

Question 105946: Can some one be so kind as to help me using the Quadriatic formula and solve the following equation? 17x+ 6 = 28x^2
Thank You for helping me.
Click here to see answer by edjones(7569)

Question 105974: how do you change 2x(x+2)+3=1 into the form of ax^2+bx+c=o
Click here to see answer by edjones(7569)

Question 105953: I did not find any solvers to help me with trying to solve this problem , can someone here please help?
Question? Use a special product formula to factor the perfect square trinomial, 49x^2 - 42x + 9.
Thanks.
Click here to see answer by alvinjohnburgos(11)

Question 105854: quadratic equations-word problem
Chris cuts half a rectangular lawn, 40m by 30m, by mowing strips around the perimeter. Jerri cuts the small rectangle left. How wide a strip does Chris cut so that they share the work equally?
Click here to see answer by ankor@dixie-net.com(15622)

Question 106016: Find the slope of the line passing through the pair of points or state that the slope is undefined.
(7,4) and (7,6)
Find the slope of the line
y=-5/7x - 9
Find the y-intercept
y=8x-1

Click here to see answer by HyperBrain(694)

Question 106068: Please help with the the equation
I understand a= 1 b=-4 c=1
and using
Why is the the discriminant:
and not
Shouldnt equal -4 not 4
Thanks

Click here to see answer by jim_thompson5910(28476)

Question 106110: The sign of the discriminant D is positive as the parabola opens upward.
We observe the x intercepts to be –1, and 0.67
So the function is written as y = a(x – (-1)) (x – 0.67) where ‘a’ is a constant.
y = a (x + 1) (x – 0.67)
The lowest point of the parabola is the vertex.
Now the parabola passes through (- 0.16, -2)
-2 = a( - 0.16 + 1) ( - 0.16 – 0.67)
-2 = a(0.84) (- 0.83)
a = -2/ (0.84)(- 0.83)
a = 2.87
Thus the quadratic equation is y = 2.87 ( x + 1) (x – 0.67)
Or y = 2.87 (x2 + 0.33x – 0.67)
The quadratic equation is 2.87 ( x2 + 0.33x – 0.67 ) = y
To solve for x, we equate y to 0.
x2 + 0.33x – 0.67 = 0
x2 + 0.33x – 0.67 = 0
x2 + x – 0.67 x – 0.67 = 0
x (x + 1) – 0.67 ( x + 1) = 0
(x + 1) (x – 0.67) = 0
X + 1 = 0 or x – 0.67 = 0
X = -1 or x = 0.67
The solution is x = -1 or x = 0.67
This is a discussion group question. One of the girls on my team came up with this but I can't figure out where she got the 0.33x. I thought I was getting it but now I am confused. Can you explain this? Please, Please!
Click here to see answer by Fombitz(13828)

Question 106169: Can someone help me solve this quadtratic problem:
2x^2+7x+5
Click here to see answer by shauna broeske(4)

Question 106169: Can someone help me solve this quadtratic problem:
2x^2+7x+5
Click here to see answer by stanbon(57203)

Question 106168: Can someone help me solve this quadtratic problem:
2x2+7x+5
4+7x+5
9+7x
Click here to see answer by shauna broeske(4)

Question 106167: I am very confused can someone help me with ths quadratic problem:
x^2+x-6
Thanks alot
Click here to see answer by stanbon(57203)

Question 106158: another problem..
If a bus traveled 10 km/h faster, it would take 2h less time to make a 315km trip. What is its speed?
Thanks!
Click here to see answer by HyperBrain(694)

Question 106156: When a car reduces it speed by 18km/h, its wheels is 200cm in circumference, take 1 sec longer to make revolutions. What was the car's original speed?
quadratic equation for this ??

Click here to see answer by ankor@dixie-net.com(15622)

Question 106309: Please help!
This is the problem given from a worksheet:
A tennis ball is hit upward from a height of 1m and leaves the racket with an initial velocity of 10m/s.
Determine the equation that shows the ball's height as a function of time.
All I need to know is what the formula is for this question. I forgot my notes and cannot remember the formula.
Thank you!
Click here to see answer by ankor@dixie-net.com(15622)

Question 106315: HELP!!!! Solve for x in terms of a????
1. 6A^2X^2 - 11AX = 10 ????????????
Click here to see answer by Fombitz(13828)

Question 106337: Please help me solve this problem I got this problem from my textbook:
Quadratic Equations
Write the equation of the axis of symmetry, and find the coordinates of the vertex of the graph of each function. Identify the vertex as a maximum or minimum. Then graph the function.
y=x^2+2x
I understand the graphing part but when i did this problem i somehow got the line to be a crooked line instead of a parabola.

Click here to see answer by stanbon(57203)

Question 106314: Solve for x in terms of a????
4a^2x^2 + 8ax + 3 = 0???
Click here to see answer by stanbon(57203)

Question 106384: A picture frame measures 12cm by 20cm. 160cm^2 of the picture shows inside the frame. What is the width of the frame? And what is the solution? thanx
Click here to see answer by scott8148(6628)

Question 106313: Solve for x in terms of a:
1.) 3x^2+ax=a^2
Click here to see answer by ptaylor(2048)

Question 106506: word problem for quadratic equation
Brendan buys a block of shares of Laser Technology for $1875. When the share price increases by $4 per share, he sells all but 15 of them for $1740. How many shares did he buy?
can anyone set-up the equation for this?? thanks for your help...

Click here to see answer by edjones(7569)

Question 106502: The edges of three cubes are consecutive odd integers. If the cubes are stacked as shown the total exposed surface area is 381 cm2. Find the lengths of the sides of the cubes.
i need an equation for this pls..
Click here to see answer by ankor@dixie-net.com(15622)

Question 106507: Car A leaves Toronto for Montreal, 500km away, at an average speed of 80km/h. Car B leaves Montreal for Toronto on the same highway 2h later at 100 km/h. How far are they from Toronto when they pass?
equation for this please.. tnx in advance. =D
Click here to see answer by stanbon(57203)

Question 106551: Two-way radio range:
Two surveyors with two-way radios leave the same point at 9:00AM, one walking due south at 4 mi/hr and the other due west at 3 mi/hr. How long can they communicate with one another if each radio has a maximum range of 2 miles?
Click here to see answer by stanbon(57203)

Question 106572: This is an online study course.
Some students planned for a get-together. The budget for food was $500. Five of the students failed to come because of the distance and therefore the cost of food for each member increased by $5. How many students attended the get-together?
500/x + 5 = 500/(x-5)

Click here to see answer by stanbon(57203)

Question 106505: Antonella bought some calculators for a total of $240. She kept one for herself and sold the rest for $300 making a profit of $5 on each calculator. How many calculators did she buy?
an equation for this pls?? anyone??
Click here to see answer by scott8148(6628)

Question 106504: Over a distance of 120 km, the average speed of a train is 40km/h faster than that of a car. If the train covers the distance in 30min less time, find its average speed.
an equation for this pls?
thanks =D
Click here to see answer by scott8148(6628)

Question 106726: z^2+5z-14=0
Click here to see answer by jim_thompson5910(28476)

Question 106725: z^2+5z-14=0
Click here to see answer by jim_thompson5910(28476)

Question 106709: can u please help me solve this problem: two positive integers are in the ratio 1:3. if their sum is added to their product the result is 224. find the integers.
Click here to see answer by scott8148(6628)

Question 106792: Could you please take the time to help me solve this problem: What is the sum of the roots of the quadratic equation: a x2 + b x + c = 0, where a, b, and c are all non-zero real constants.
Thanks for your help.
Click here to see answer by Earlsdon(6287)

Question 106819: Hello, I was asked to perform this operation and I cannot find a similar example in my book. It looks like it should be easy, but I can't get started.

__4__ - _15_ When I previewed my question it doesn't look like it should
2x-4 5x It should be 4/2x-4-15/5x

Thank you for your help. Paul
Click here to see answer by edjones(7569)

Question 106823: Hello, this is a tricky one.Find the domain of this function
f(x) = SR of 1/2x-1
(square root)
Where do I start? Thank you, Paul
Click here to see answer by edjones(7569)

Question 106822: Hello, I was given this question and I have no idea what it means.
Find all real solutions (m)^-4/3 = 16 ??????? Could you please help me with this one. Thank you, Paul
Click here to see answer by edjones(7569)

Question 106820: Hello, I don't know how to display the square root sign so I will abreviate with SR. Perform the operation and simplify SR of 12 - SR of 50 + SR of 72. Thank you, Paul
Click here to see answer by edjones(7569)

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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