# Questions on Algebra: Quadratic Equation answered by real tutors!

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 Quadratics: solvers Practice! Answers archive Lessons Word Problems In Depth

 Question 424932: 16 = if x=1 then y=2; if x=2 then y=4; if x=3 then y=7; if x=4 then y=11; if x=5 then y=16; What will be the formula to solve for Y if X is given? Click here to see answer by htmentor(789)

 Question 425058: The equation 4x^2+15x+2=0 has two solutions A and B where A less than B and A= B= Click here to see answer by Alan3354(30993)

 Question 425052: The formula y=2.6sqrtX +9 models the percent of U.S. adults who are considered obese by federal guidelines, where X is the number of years after 1980, and Y is the percent of obese adults. In this equation, Y is already converted from a decimal, so, for example, a 55% obesity rate would correspond to Y=55. According to this formula, in what year was the obesity rate 15.4 percent? Answer: In the year Round to the nearest actual year. Click here to see answer by htmentor(789)

 Question 425151: 35,000*6.99*7= Click here to see answer by MathLover1(6634)

 Question 425328: how do you solve this equation using the quadratic formula y^2-10y+22=0 Click here to see answer by rfer(12660)

 Question 425433: Consider the Quadratic function . f(x)=3x^2-15x-18 its vertex is ( ) its largest x-intercept is x=( ) its y-intercept y=( ) Click here to see answer by lwsshak3(6508)

 Question 425432: A classic physics problem states that if a projectile is shot vertically up into the air with an initial velocity of 128 feet per second from an initial height of 112 feet off the ground, then the height of the projectile, h , in feet, t seconds after it's shot is given by the equation: h= -16t^2+128t+112 Find the two points in time when the object is 147 feet above the ground. Round your answers to the nearest hundredth of a second (two decimal places). Click here to see answer by lwsshak3(6508)

 Question 425723: if a = (b^2)/c - b What does b = Click here to see answer by Alan3354(30993)

 Question 425782: how do i figure out the y intercept and the x intercept in 5x^2 + 5y^2 = 45? please helpp Click here to see answer by stanbon(57357)

 Question 425871: how do you do this (-bą√(b^2-4ac)2a Click here to see answer by Theo(3464)

 Question 426176: solve the linear quadratic system algebraically y= 5-x^2 y= x-15 Click here to see answer by ewatrrr(10682)

 Question 426313: i dont get how you find a,b,c in the standard form equation y= 2x to the second power Click here to see answer by richard1234(5390)

 Question 426392: What are the solutions to (x-1)(2x+5)=0? a) -1 and 5/2 b) -1 and 2/5 c) 1 and - 5/2 d) 1 and - 2/5 Click here to see answer by mananth(12270)

 Question 425875: a daily newspaper had 12,125 subscribers when it began publication. five years later it had 10,100 subscribers. what is the average yearly rate of change in the number of subscribers for the five-year period? Click here to see answer by ankor@dixie-net.com(15652)

 Question 426420: I am asked to create a quadratic function, y=f(x), that satisfies the following conditions: f(7)=2, f(-5)=-10, and y-intercept is (0,6) NO clue where to begin. I know I could do something if I had the x-intercepts. But what I start with is: 6=ax^2+bx+c , but then I come up with 6=c and I feel like I just need a starting point. I was not tought this in my current class, supposedly this is suppose to be prerequisite homework... Thanks for any help...Kate Click here to see answer by Alan3354(30993)

 Question 426387: Solve the following quadratic equation by factoring: 4x^2 - 9x + 2 = 0 Click here to see answer by edjones(7569)

 Question 426489: Using the General Quadratic Formula: 2x^2-7x+6 Click here to see answer by ewatrrr(10682)

 Question 426538: Hello there: There are only four questions that I need help with. Thank you so much in advance, I really appreciate all of your help. 1. Solve (2x  3)(x + 2) = 0 2. 6 = a^2  5a 3. 12x + 4 = -9x^2 4. 4y^2 = 25 Click here to see answer by nerdybill(6959)

 Question 426562: Solve using the quadratic formula. Then use a calculator to approximate to three decimal places the solutions as rational numbers. X^2-4x+1=0 Click here to see answer by ewatrrr(10682)

 Question 426577: what does the graph x^3-400x look like Click here to see answer by ewatrrr(10682)

 Question 426640: Solve each equation using the quadratic formula. 3x^2+2x-1=0 Click here to see answer by ewatrrr(10682)

 Question 426672: If P dollars are deposited at an interest rate r and compounded n times, the future value An can be found by the formula An=P(1=r)^n. Find the rate of interest if a principal amount of \$5000 grows to \$6050 in 2 years if interest is compunded annually? Answer key has 10% as the answer but doesn't explain the process of solving the equation. Click here to see answer by htmentor(789)

 Question 426642: Solve each equation using the quadratic formula. 1.x^2+10=-25 2.2x^2-5=-3x Click here to see answer by Alan3354(30993)

 Question 426848: I need help I have solve this quadratic equation, and I want to know if its right is there a way to check? ...my answer is x=1+ - 2sqrt(5). thank you. Click here to see answer by stanbon(57357)
 Question 426848: I need help I have solve this quadratic equation, and I want to know if its right is there a way to check? ...my answer is x=1+ - 2sqrt(5). thank you. Click here to see answer by robertb(4012)

 Question 426927: what points go into 4x-3y=0 Click here to see answer by Alan3354(30993)

 Question 426919: a rectangular painting has the dimensions x and x+10. the painting is in a frame 2 inches wide. the total area of the picture and the frame is 936 in. what are the total dimensions of the painting this is my problme solving question and my formula for solving ( factoring ) was ( x+2) (x+12)=936 i multiplied out and got xē+14x+24=936. i just don't understand where to go after i use completing the square and getting x=-38 and x=29 how do i find the dimensions from two x values Click here to see answer by jorel1380(2518)

 Question 426954: 6x^2 - 7x - 5/ 3-x (3x  5)(2x + 1)/ 3  x After this point I have no idea what I'm doing. The more i do it, the more I seem to drift from the rules of how to solve. Can it be simplifies more than this? Click here to see answer by Adrish(44)
 Question 426954: 6x^2 - 7x - 5/ 3-x (3x  5)(2x + 1)/ 3  x After this point I have no idea what I'm doing. The more i do it, the more I seem to drift from the rules of how to solve. Can it be simplifies more than this? Click here to see answer by dnanos(83)

 Question 427167: what are the solutions to the equation x^2+7x=-12 Click here to see answer by josmiceli(9681)

 Question 427200: I am trying to find a way to solve this problem. A gravel path of equal width is to be built around a 8' by 8' square garden. How wide can the path be if there is enough gravel for 80 square ft? Click here to see answer by unlockmath(1599)
 Question 427200: I am trying to find a way to solve this problem. A gravel path of equal width is to be built around a 8' by 8' square garden. How wide can the path be if there is enough gravel for 80 square ft? Click here to see answer by josmiceli(9681)

 Question 427241: how do i solve this quadratic eqaution 7x+36=x+4 Click here to see answer by rfer(12660)
 Question 427241: how do i solve this quadratic eqaution 7x+36=x+4 Click here to see answer by richard1234(5390)

 Question 427178: The motion of an autombile acceleration away from traffic light is represented by the funcitond(t) = 9t^2, where t is the time in seconds and d(t) is the distanct covered by the automobile. Approximately how many seconds does it take for the automobile to travel 180 feet? Click here to see answer by Alan3354(30993)

 Question 427433: how do you find the domain in interval notation of 5x-4 over 3-2x Click here to see answer by ewatrrr(10682)

 Question 427436: how do you find the domain in interval notation of 3x^2-7x+5=11 Click here to see answer by shree840(260)

 Question 427442: what is the x-intercept of y=x^2-2x-3? Click here to see answer by John10(245)
 Question 427442: what is the x-intercept of y=x^2-2x-3? Click here to see answer by ewatrrr(10682)

 Question 427441: What is the y-intercept of y=x^2-2x-3 Click here to see answer by ewatrrr(10682)

 Question 427423: Find the following f[g(x)] if f(x)=3x-7 and g(x)=x^3-2x^2-x+1 Click here to see answer by John10(245)

 Question 427479: What is the axis of symmetry of y=x^2-2x-3? Click here to see answer by rfer(12660)

 Question 427477: What is the vertex of y=x^2-2x-3? Click here to see answer by rfer(12660)

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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