Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 623544: A catapult launches a boulder with an upward velocity of 112 ft/s. The height of the boulder, h, in feet after t seconds is given by the function .
How long does it take the boulder to reach its maximum height? What is the boulder�s maximum height? Round to the nearest hundredth, if necessary.
Click here to see answer by solver91311(24713)

Question 623696: The area of a rectangular plot 24 feet long and 16 feet wide will be doubled by adding an equal distance to each side of the plot. What is the distance added to each side?
Click here to see answer by ewatrrr(24785)

Question 623713: factor: 5x2 + 12x = 0
Click here to see answer by jim_thompson5910(35256)

Question 623713: factor: 5x2 + 12x = 0
Click here to see answer by ewatrrr(24785)

Question 623799: Solve the following equations for x using any method.
1)
Also for the equation:
2)
would the correct answer be x=-1 or x=11?
Click here to see answer by Alan3354(69443)

Question 623787: I need to simplify this expression to the simplest form.

Click here to see answer by math-vortex(648)

Question 623842: Consider the following quadratic equation: 5x^2-37x+17=3
*Note: Solve by factoring.
Click here to see answer by lwsshak3(11628)

Question 623921: Write the decimals in order from least to greates.
6.81, 0.0681, 68.1, 0.681
Thanks you, this is for my granddaughter.
Gina
Click here to see answer by ewatrrr(24785)

Question 623921: Write the decimals in order from least to greates.
6.81, 0.0681, 68.1, 0.681
Thanks you, this is for my granddaughter.
Gina
Click here to see answer by Theo(13342)

Question 623944: I have a problem
I need to find the mean on this problem, and I know you add them up and divide by how many numbers are there, but this one I am not sure if this is correct.
Find the mean:
scores in golf: 4, -5, 2, -5, 7, -3, 5, -3, 4
Well when I add them up I get 6 and then divide by 9, is this correct?
Please help
Thanks
Gina
Click here to see answer by jsmallt9(3758)

Question 624108: Determine the graph of the quadratic equation y = 8x^2 � 8.
Click here to see answer by Alan3354(69443)

Question 624098: 1) Find the vertex, the line of symmetry, and the max or min value of f(x). Graph the function.
f(x)=1/3(x+8)^2+9
The vertex is ?
The line of symmetry is ?
What is the max/min value of f(x)?
2) Find the x-intercepts and y-intercepts for f(x)
f(x)=x^2-6x+7
The x-intercept is?
The y-intercept is?
3)Give exact and approximate solutions to three decimal places.
(x-3)^2=12
What are the exact solutions?
What are the approximate solutions?
4) Find the vertex, the line of symmetry, and the max or min value of f(x). Graph the function.
f(x)= -x^2+12x+2
The vertex is?
The equation of the line of symmetry is?
The max/min of f(x) is?
The value of f(6)=38 is max or minimum?
Click here to see answer by solver91311(24713)

Question 624136: For the function f(x)=(1/4)x+2, find the value of x for which f(x)=x
Click here to see answer by nerdybill(7384)

Question 624240: Find the exact solution of the following quadratic equation by using the Quadratic Equation. 4x^2+7=9x
Click here to see answer by ewatrrr(24785)

Question 624521: find the vertex, line of symmetry, min or max and graph. f(x)=-2x^2+2x+1
Click here to see answer by ewatrrr(24785)

Question 624550: I Need Help With This Quadratic equation . 2m^2+2m-12=0
Click here to see answer by jim_thompson5910(35256)

Question 624567: I need help with this

Use the substitution method to solve the system

-x + y= -1
4x-3y=3
Click here to see answer by solver91311(24713)

Question 624571: This makes no sense to me someone explain this to me.

Use the substitution method to find all solutions of the system
y=x+1
xy=6

Click here to see answer by solver91311(24713)

Question 624568: someone help me i need to figure out these answer can you guys show steps.

Use the substitution method to solve the system
y=x^2
y= 7x- 6
i need to find x1 x2 y1 and y2

Click here to see answer by ewatrrr(24785)

Question 624575: I cant get the right answer for y i know x = 0 can someone help me find y

Use the substitution method to solve the system

-x + y= -1
4x-3y=3 ''.
Click here to see answer by ewatrrr(24785)

Question 624574: I am having a hard time doing this can someone help me

Use the substitution method to find all solutions of the system

y=x+1
xy=6
Click here to see answer by solver91311(24713)

Question 624570: Does anyone know how to do this i need help.
Use the substitution method to solve the system
x^2+y^=20
x+y=1
Click here to see answer by oscargut(2103)

Question 624720: Can this polynomial be factored?
16�a^2-56�xy+49�b^2 or
30�x^3+25�x^2+5y
Click here to see answer by Edwin McCravy(20055)

Question 624796: m2-5m=14
Click here to see answer by asuar010(338)

Question 624832: In solving the equation (x + 1)(x � 2) = 4, Eric stated that the solution would be
x + 1 = 4 => x = 3
or
(x � 2) = 4 => x = 6
However, at least one of these solutions fails to work when substituted back into the original equation. Why is that? Please help Eric to understand better; solve the problem yourself, and explain your reasoning.

Click here to see answer by shalon(2)

Question 624828: x^(2/3)-3x^(1/3)-18=0 help solve x
Click here to see answer by jsmallt9(3758)

Question 624896: hi im so confused what happend if come across a problem like this (a+1)(a+2)=0
and a problem n^+3n-12=6 the ^ is 2
Click here to see answer by Edwin McCravy(20055)

Question 624896: hi im so confused what happend if come across a problem like this (a+1)(a+2)=0
and a problem n^+3n-12=6 the ^ is 2
Click here to see answer by ewatrrr(24785)

Question 624896: hi im so confused what happend if come across a problem like this (a+1)(a+2)=0
and a problem n^+3n-12=6 the ^ is 2
Click here to see answer by josmiceli(19441)

Question 624921: Simplify 35000x^2-x/200x
Click here to see answer by jim_thompson5910(35256)

Question 625103: (1/x-1)-(1/x+1)=(2/x^2-1)
list the value of restriction on the variable and solve the equation

Click here to see answer by oscargut(2103)

Question 625171: You are given the coordinates of the vertex (7,8) and of a point (-4,-9) on a parabola. Find the equation of the parabola
Click here to see answer by nerdybill(7384)

Question 625171: You are given the coordinates of the vertex (7,8) and of a point (-4,-9) on a parabola. Find the equation of the parabola
Click here to see answer by oscargut(2103)

Question 625188: Please help me solve this equation using synthetic division
Click here to see answer by Alan3354(69443)

Question 625211: This is actually for QUADRATIC FORMULA, NOT QUADRATIC EQUATION
Solve by completing the square
2x^2 + 11x - 1 = 0
The solution set is { }
Click here to see answer by josmiceli(19441)

Question 625252: Solve by completing the square
m^2 - (25/2)m = 5/2
The solution set is { }
I got this but it says it is wrong
m = (-25 + or - sqr root 665)/ 4
Click here to see answer by josmiceli(19441)

Question 625287: Given that (x+1) is one of the factors of P(x), then find the rest of the factors of P(x), where

Click here to see answer by nerdybill(7384)

Question 625327: x(10x-1)=0
Click here to see answer by oscargut(2103)

Question 625326: 5t2+7t=0

Click here to see answer by oscargut(2103)

Question 625414: if an M-16 is fired straight upward, then the height h(t) of the bullet in feet at time t in seconds is given by h(t) = -16t^2 + 325t
a. what is the height of the bullet 5 seconds after it is fired ? evaluate h(5)
b. How long does it take for the bullet to return to earth ?
Click here to see answer by lwsshak3(11628)

Question 625217: Find the vertex, line of symmetry,and the maximum or minimum value of f(x), graph the function.
f(x)=(1)/(3)(x+1)^(2)+6
Click here to see answer by lwsshak3(11628)

Question 625213: I need help, I am stuck on this word problem from Quadratic Equations:
The number of tickets sold each day for an upcoming performance of Handel's Messiah is given by N(x)=-0.5x^2+11x+15, where x is the number of days since teh concert was first announced. When will the daily ticket sales peak and how many tickets will be sold that day?
Click here to see answer by lwsshak3(11628)

Question 624255: A boat traveled downstream a distance of 128mi and then came right back. If the speed of the current was 7mph and the total trip took 5hrs and 20mins, find the average speed of the boat relative to the water.
Click here to see answer by lwsshak3(11628)

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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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, 27136..27180, 27181..27225, 27226..27270, 27271..27315, 27316..27360, 27361..27405, 27406..27450, 27451..27495, 27496..27540, 27541..27585, 27586..27630, 27631..27675, 27676..27720, 27721..27765, 27766..27810, 27811..27855, 27856..27900, 27901..27945, 27946..27990, 27991..28035, 28036..28080, 28081..28125, 28126..28170, 28171..28215, 28216..28260, 28261..28305, 28306..28350, 28351..28395, 28396..28440, 28441..28485, 28486..28530, 28531..28575, 28576..28620, 28621..28665, 28666..28710, 28711..28755, 28756..28800, 28801..28845, 28846..28890, 28891..28935, 28936..28980, 28981..29025, 29026..29070, 29071..29115, 29116..29160, 29161..29205, 29206..29250, 29251..29295, 29296..29340, 29341..29385, 29386..29430, 29431..29475, 29476..29520, 29521..29565, 29566..29610, 29611..29655, 29656..29700, 29701..29745, 29746..29790, 29791..29835, 29836..29880, 29881..29925, 29926..29970, 29971..30015, 30016..30060, 30061..30105, 30106..30150, 30151..30195, 30196..30240