Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 13550: find two consecutive integers whose sum is 100
Click here to see answer by LilSkittleMd(119)

Question 13910: How do you solve dividing fractions

Click here to see answer by elima(1433)

Question 13991: I don't understand how to do this equation. A friend gave me the answer, but didn't explain the work.Help.
x^2-11x+28=0
Click here to see answer by smik(40)

Question 13245: how do you graph quadratic equations?
Click here to see answer by LilSkittleMd(119)

Question 14028: Find all solutions of the equations.
1.
x⁶ - 64 = 0
2.
9x⁴ - 24x³ + 16x² = 0

Click here to see answer by AnlytcPhil(1277)

Question 14066: a+b=3
-b+c=3
a+2c=10
Click here to see answer by rahman(247)

Question 14136: the radius r of a sphere is increasing at a rate of 2 inches per minute. find the rate of change of the volume when r=6 inches and dr/dt=24 inches.
Click here to see answer by longjonsilver(2297)

Question 14211: i'm in pre-calculus and our teacher gave us an extra credit problem. It reads:
Derive the quadratic formula. (Hint: Solve the general quadratic equation ax^2+bx+c=0 but a cannot = 0)
How do i go about solving this? I need it for tomorrow. 10/7/05

thanks!!
Click here to see answer by Earlsdon(6287)

Question 14442: In school i lerned how to slove the quadratic equations by spliting it into seperate fractions . I never learned to slove the way they slove it on www.algebra.com . My question is there a section in this site to pratice questions my way or can you teach me to learn the way they slove it on this site
thank you,
Click here to see answer by Earlsdon(6287)

Question 14526: How to graph a linear system and estimate the solution. Then check the solution algebrically.
problem: 2x + y= 13
5x- 2y= 1
Click here to see answer by elima(1433)

Question 14689: A computer and its monitor weigh a total of 48 pounds. If the monitor weighs twice as much as the computer, how much does each piece of hardware weigh?
Click here to see answer by Drpengui(15)

Question 14103: 2x+3y+4z=2
5x-2y+3z=0
x-5y-2z=-4

Click here to see answer by venugopalramana(3286)

Question 14104: 2x-5y+z=5
3x+2y-z=17
4x-3y+2z=17
Click here to see answer by venugopalramana(3286)

Question 14863: I've tried very hard to solve this equation I'm desperate please help I have a 69 average in algebra I'm Begging you PLEASE and Thank YOU
Click here to see answer by jb007mi6(53)

Question 14811: A man has a goat, a wolf, and a head of cabbage. He comes to a river and must bring these three things across to the other side. The boat can only take the man plus either the goat, wolf, or cabbage. There is another problem. If the cabbage is left with the goat, the goat will eat the cabbage. If the wolf is left with the goat, the goat will be devoured. How can he transport the wolf, goat, and cabbage to the other side? Your answer should be a series of steps.
Click here to see answer by Alwayscheerful(414)

Question 14976: what two consecutive even integers equal 450
Click here to see answer by jb007mi6(53)

Question 15100: Pelipa is adding a second story to her house. The addition is rectangular, and the outside dimensions of the walls are 18 feet (east to west) and 28 feet(north to south). The roof will have a 4-12 slope with the ridge running north and south. There will be a 9 inch overhang on all sides of the roof. Pelipa needs to order shigles now so that they will be on the job site when she is ready for them. The roofing company waants to know how many squares of shingles she will need.
Deal with this qustion for Pelipa. There may be some terms and concepts in the information given that you will need to research. Make careful drawings and calculatons. Explain how you arive at your estimate
Click here to see answer by bam878s(77)

Question 15166: Help! I've been trying to solve this problem and am stuck.
Three consecutive numbers are multiplied together to get 24. Can you help?
Click here to see answer by rapaljer(4667)

Question 15188: When solving a rational equation, why it is OK to remove the denominator by multiplying both sides by the LCD and why can you not do the same operation when simplifying a rational expression or adding rational expressions?
The only answere that I have come up with so far is the one is an expression and one is an equation. With the equation we are solving for a variable, and with an expression we are simplyfying and then doing what is required ie, add, subtract, multiple or divide. Is there more to this question that I am missing?

Click here to see answer by rapaljer(4667)

Question 15139: the length of a rectangle is 3cm.greater than its width. its area is 70sq.cm, find itsdimension
Click here to see answer by rapaljer(4667)

Question 14834: i have a worded problem that i cannot do. it goes like this:
A triangles base is x cm and the height is 3cm shorter than the base if the area is 20 what is the value of x.
I have worked out the answer but i dont know how to get to it.
please help me
Click here to see answer by rapaljer(4667)

Question 15508: The second of three numbers is 8 more than the first, and the third number is 3 less than 3 times the first. If the third number is 15 more than the second, find the three numbers.
Click here to see answer by smik(40)

Question 15510: The time a basketball player spends in the air when shooting a basket is called "the hang time." The vertical leap L measured in feet is related to the hang time "t" measured in sefconds by the equation L=4t^2. A typical athlete has a vertical leap of 1 1/2 to 2 feet; the best male jumpers attain heights of 3 1/2 to 4 feet. What is the hang time of an athlete who has a vertical leap of 2.8 feet?
Click here to see answer by smik(40)

Question 15511: Each employee has a seperate telephone line. The company is studying the possible number of telephone calls that can be made from people in the office to other people in the office. They have discovered that the total number of possible telephone calls T is described by the equation T = 0.5(x^2-x), where x is the number of people in the office. If 45 people are presently employed at the office, how many possible telephone calls can be made between these 45 people?
Click here to see answer by pwac(253)

Question 15507: factor each trinomial using trail and error.15x^2-x-2
Click here to see answer by Earlsdon(6287)

Question 15449: I want to know how to factor from the standard form of a quadratic equation. I'm in the beginning of college algebra, and can't remember how to do it.
The problem is: 10x^2 - 3x - 4 = 0
how do i figure out x without doing the whole quadratic equation?
I know the answer to factoring is (2x + 1) (5x - 4). how do you get that??
Click here to see answer by vasu2qute(17)

Question 15483: Please solve following quadratic equations using method completing the square:
x^2 + x = -1
Click here to see answer by Earlsdon(6287)

Question 15667: Please solve quadratic equation using method completing the square
x^2 + 3x = -1
Click here to see answer by Earlsdon(6287)

Question 15590: How do you find the quadratic equation of a parabola with a vertex of (8, 102), a y-intercept of (0, 98.6) and a zero of (16,0)? I have tried to solve the equation -(b/2a) =8, but that hasn't worked out well. I've also tried to solve for a or b since I know that c is equal to 98.6, but so far I cannot get the right equation. All I have is that 64a + 8b + 98.6 = 102 and 256a + 16b + 98.6 = 0. I know a is a negative number, but that is the only other information I have.
Click here to see answer by khwang(438)

Question 15696: Please can you help with this question:
Given that, for all values of x:
Find the values of p,q and r
Click here to see answer by venugopalramana(3286)

Question 16075: what is tan 90
Click here to see answer by rapaljer(4667)

Question 16075: what is tan 90
Click here to see answer by 997966(3)

Question 16270: 2+3x < 3(x-1)
Click here to see answer by MathGrace(6)

Question 16324: I was just wondering if someone could tell me if I did this correctly or not and if not how to do it correctly. Thank you.
Solve for x without using decimals:

(2x + 3)^2 - (x - 2)^2 = 3
(2x+3)(2x+3) – (x-2)(x-2) = 3
4x^2 + 6x + 6x + 9 – x^2 – 2x – 2x + 4 = 3
4x^2 + 12x + 9 – x^2 – 4x + 4 = 3
4x^2 + 8x + 13 – x^2 = 3
3x^2 + 8x + 13 = 3
3x^2 + 8x + 10 = 0
A = 3
B = 8
C = 10
8^2 – 4*3*10 = -56
No real solution.

Click here to see answer by Earlsdon(6287)

Question 16402: I am a 44 year old who is studying for my year 10 and I need help with factorise and simplify. I have read all the books I could find on the subject but they just confuse me more.
How would I for e.g factorise and simplify
5b+15
______
7b+21
I need all the help I can get.
thank you.
Click here to see answer by elima(1433)

Question 16453: I have factorised m^2-12m+35 could you please let me know how to simplify it.
__________
m^2-25
thank you.
Click here to see answer by shirsenduban(10)

Question 16562: at what temperature will celsius and fahrenheit be the same?
Click here to see answer by venugopalramana(3286)

Question 16606: I am a high school student who is having problems with equations and no matter how hard I try I cannot solve this equation.
can you please help me.
3x-4=2x+8
thank you
Click here to see answer by LilSkittleMd(119)

Question 16607: I am a high school student who is having problems with equations and no matter how hard I try I cannot solve this equation.
3x-4=2x+8
can you help me please.
Click here to see answer by Earlsdon(6287)

Question 16653: Two numbers, which differ by 3, have a product of 88. Find them by forming a quadratic equation.
Click here to see answer by rahman(247)

Question 16741: A group of students in Mr. Swanson’s statistics class collected data on the price of a 20 ounce loaf of white bread at various stores in the area. The prices they obtained were: $0.79, $1.19, $0.33, $1.22, $1.05, $1.49, $1.19, $1.29, and $0.99. If M is the median of these prices and N is the mean, find M – N.
Click here to see answer by rapaljer(4667)

Question 16739: The perimeters of a square and an equilateral triangle are equal. If the area of the square is 5.76 square centimeters, what is the perimeter of the triangle?
Click here to see answer by rapaljer(4667)

Question 16737: Margarita received grades of 79%, 86%, 92%, and 83% on his first four Algebra/Trigonometry exams. What grade must she get on the next exam in order to increase her test average by 2 points?
Click here to see answer by rapaljer(4667)

Question 16736: When you double a number then add 20, you get four-thirds of the original number. Write an equation to represent this relationship. Use x for your variable.
Click here to see answer by pwac(253)

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, 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