Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 245706: f(x)=-x^2+8x-8... find the y cordinate
Click here to see answer by Alan3354(69443)

Question 246826: What are the solutions for the equation (5x-2)^2=10
Click here to see answer by richwmiller(17219)

Question 246843: a car is traveling on a road perpendicular to a railroad track. when the car is 30 meters from the crossing, new collision detector warns the driver that there is a train 50 meters from the car and heading toward the same crossing. How far is the train from the crossing?
Click here to see answer by richwmiller(17219)

Question 246868: 41 + 7t= -22

Click here to see answer by richwmiller(17219)

Question 246863: (z-4) (z+3)
Click here to see answer by checkley77(12844)

Question 246912: Bobby Treatman's Paint Store sells a special shade of pink paint (Bobby's Blush) which is made from red paint and white paint. The amount of red paint needed is three times the amount of white paint. How much of each kind of paint is needed to make 388 gallons of Bobby's Blush? (Let x represent the number of gallons of red paint and y represent the number of gallons of white paint.)
Click here to see answer by solver91311(24713)

Question 246910: Use the discriminant to determine whether the following equations have solutions that are: two different rational solutions; two different irrational solutions; exactly one rational solution; or two different imaginary solutions.
t2 + 4t + 4 = 0
Click here to see answer by richwmiller(17219)

Question 246960: I cannot find my error.
I am supposed to use the quadratic formula to solve:
x^2+4x=5
This is what i got:
x=-4+-radical4^2-4*1*5/2*1
-4+-radical 16-20/2
-4+-radical -4/2
-4+-2i/2
-2+-i
Hope that makes sense. I am frustrated with this problem
Click here to see answer by solver91311(24713)

Question 246978: y=3x^2-8x+4
Click here to see answer by justinz(4)

Question 246978: y=3x^2-8x+4
Click here to see answer by checkley77(12844)

Question 246777: 5
DIVIDED BY
3
Click here to see answer by Jeff Gordon(65)

Question 247028: x^2+8x=9 is there any way to make this understandable. I am really confused on how to solve these problems!!!
Click here to see answer by Alan3354(69443)

Question 247077: solve using the quadratic formula.
Click here to see answer by solver91311(24713)

Question 247141: 1.Let f(x) = (x - 8)2. Find x so that f(x) = 100
2.Write a quadratic equation having the given numbers as solutions.
3, -8

Click here to see answer by stanbon(75887)

Question 247359: Find the y-intercept, the equation of the axis of symmetry, and the x-coordinate of the vertex. f(x)=-2x^2
Click here to see answer by checkley77(12844)

Question 247384: Determine whether the equation has two distinct real number solutions, one real numbers solution, or no real number solution.
x^2 - 8x + 16 = 0
Click here to see answer by checkley77(12844)

Question 247382: Determine whether the equation has two distinct real number solutions, one real numbers solution, or no real number solution.
x^2 - 5x - 6 = 0
Click here to see answer by dabanfield(803)

Question 247378: Use the quadratic formula to solve the euation. If the equation has no real number solutions, so state.
x^2 + 7x - 60 = 0
Click here to see answer by oberobic(2304)

Question 247383: Determine whether the equation has two distinct real number solutions, one real numbers solution, or no real number solution.
3x^2 + x + 6 = 0
Click here to see answer by checkley77(12844)

Question 247404: solving quadratic eaquations by factoring
n-4=n^2-6
Click here to see answer by checkley77(12844)

Question 247407: 25x^2+15x+9=0 I need to solve this by using the Quadratic Equation. It came out with -675 when I subtracted 225-900. Can you tell me what I should do next...
Click here to see answer by oberobic(2304)

Question 247379: Solve the equation using the quadratic formula.
4x^2 - 23x - 6 = 0
Click here to see answer by checkley77(12844)

Question 247661: How do I use this formula x=(-b�√(b^2-4ac))/2a and find out what a, b, and c are, then plug those numbers in and get x-intercepts? The equation to solve is
y=x^2+4x-1
Click here to see answer by oberobic(2304)

Question 247659: How do you solve ?
Click here to see answer by oberobic(2304)

Question 247739: Solve the following problems by defining the variable, writing a quadratic equation, solving it and then providing a written conclusion:
- Four more than the square root of twice a number is equal to 12. What is the number?
Click here to see answer by richwmiller(17219)

Question 247740: Solve the following problems by defining the variable, writing a quadratic equation, solving it and then providing a written conclusion.
- The sum of the squares of two consecutive even numbers is 1460. Find the numbers.
Click here to see answer by stanbon(75887)

Question 247743: Solve the following problems by defining the variable, writing a quadratic equation, solving it an then providing a written conclusion.
- A cannonball is fired form ground level on an arc described by h = -t^2 + 28t where "h" is the height in meters at any time "t" in seconds. Determine the number of seconds it would take the ball to reach a height of 192m. At what other point in its flight is also at 192m?
Click here to see answer by Alan3354(69443)

Question 247712: Using the discriminant, determine the number of x-intercepts the graph of the equation will have. Do not graph the equation.
y = -5x^2 + 4x - 1
Click here to see answer by Alan3354(69443)

Question 247788: Use the discriminant to determine whether the following equations have solutions that are: two different rational solutions; two different irrational solutions; exactly one rational solution; or two different imaginary solutions.
9x2 + 4x - 5 = 0
Click here to see answer by richwmiller(17219)

Question 247790: Translate the problem into a pair of linear equations in two vaiables. Solve the equations using either elimination or substitution. State your answer for the specified variable.
Andy has 14 coins made up of quarters and half-dollars, and their total value is $4.25. How many quarters does he have?
Click here to see answer by richwmiller(17219)

Question 247789: The formula s = 16t2 is used to approximate the distance s, in feet, that an object falls freely (from rest) in t seconds. Use this formula to solve the problem. (Round answer to the nearest tenth.)
A branch of a tree hangs 575 ft above the soil. If a twig breaks off, how long will it take it, falling freely, to reach the soil
Click here to see answer by solver91311(24713)

Question 247827: Solve the equation using the quadratic formula.
4x^2 - 23x - 6 = 0
Click here to see answer by solver91311(24713)

Question 247824: Use the quadratic formula to solve the euation. If the equation has no real number solutions, so state.
3x^2 + x - 3 = 0
Click here to see answer by Alan3354(69443)

Question 247828: Solve the equation using the quadratic formula.
2x^2 = 30
Click here to see answer by solver91311(24713)

Question 247825: Use the quadratic formula to solve the equation. If the equation has no real number solutions, so state.
x^2 + 7x + 2 = 0
Click here to see answer by richwmiller(17219)

Question 247840: Can you help solve this problem, I know that I'm missing something here....
f(x) = 1x^2 - 6x + 2
I just need the steps for the -6 when calculating the vertex - b/2a is confusing me.

Click here to see answer by stanbon(75887)

Question 247798: Use the quadratic formula to determine the x-intercepts (if any) of the following function. Then evaluate the function for several values of x, and use the resulting points to graph the function.
f(x)=-x^2+1
Click here to see answer by Fombitz(32388)

Question 247757: f(x)=7x squared what is the vertex and line symmetry
Click here to see answer by Alan3354(69443)

Question 247808: Hello,
Can someone help me with these problems.

1. Solve using the quadratic formula

2. Use the discriminant to determine whether the following equations have solutions that are; two different rational solutions, two different irrational solutions, exactly one rational solution, or two different imaginary solutions

3. Use quadratic formula to determine the x intercepts (if any) of the following function. Then evaluate the function for several values of x and use the resulting points to graph the function.

Thank you so much, I think you all are great people for help people like me who have been out of school for so long.
Tam

Click here to see answer by checkley77(12844)

Question 247939: Hi! So I'm having trouble solving an quaratic equation. It has to do with fining initial velocity from the starting point. The qestion is, While on vacation, Ben dropped his glasses over the edge of the Grand Canyon. If he was 384 feet up when the glasses fell, how long till till the glasses hit the river below? The eqation to set it up is Can you please help!?
Click here to see answer by stanbon(75887)

Question 247946: how to apply quadratic equation in daily life?
can you give me five(5)problem with a solution..
Click here to see answer by richwmiller(17219)

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, 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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20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 23941..23985, 23986..24030, 24031..24075, 24076..24120, 24121..24165, 24166..24210, 24211..24255, 24256..24300, 24301..24345, 24346..24390, 24391..24435, 24436..24480, 24481..24525, 24526..24570, 24571..24615, 24616..24660, 24661..24705, 24706..24750, 24751..24795, 24796..24840, 24841..24885, 24886..24930, 24931..24975, 24976..25020, 25021..25065, 25066..25110, 25111..25155, 25156..25200, 25201..25245, 25246..25290, 25291..25335, 25336..25380, 25381..25425, 25426..25470, 25471..25515, 25516..25560, 25561..25605, 25606..25650, 25651..25695, 25696..25740, 25741..25785, 25786..25830, 25831..25875, 25876..25920, 25921..25965, 25966..26010, 26011..26055, 26056..26100, 26101..26145, 26146..26190, 26191..26235, 26236..26280, 26281..26325, 26326..26370, 26371..26415, 26416..26460, 26461..26505, 26506..26550, 26551..26595, 26596..26640, 26641..26685, 26686..26730, 26731..26775, 26776..26820, 26821..26865, 26866..26910, 26911..26955, 26956..27000, 27001..27045, 27046..27090, 27091..27135, 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