Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 1030908: -2x^2-5x-5=0
Click here to see answer by Boreal(15235)

Question 1030876: Renee rows a boat downstream for 27 miles. The return trip upstream took 24 hours longer. If the current flows at 4 mph, how fast does Renee row in still water?
Click here to see answer by ikleyn(52747)

Question 1030941: 2t(t+2)=1
How would that be solved using the quadratic formula?
Click here to see answer by ikleyn(52747)

Question 1030926: I used the equation, y=-6x^2+36x to model the flight of hitting a tennis ball. The problem asked when was the ball exactly 48 feet off the ground. I used the x-box to find that after two seconds after being hit, the ball was exactly 48 feet off the ground. Unfortunately, I only solved half of the problem because the ball will reach 48 feet again before it hit the ground. Please help.
Click here to see answer by ikleyn(52747)

Question 1030987: The area of a certain rectangular pen is given by the formula: A(w) = 14w - w^2 ... where w represents the width in feet. a) Determine the width that produces the maximum area. b) What is the length of the pen (find the area with your answer to part a)? c) Of all rectangles, which particular type gives the maximum area?
Click here to see answer by Alan3354(69443)

Question 1031038: Change each question to fraction and then simplify

Click here to see answer by Alan3354(69443)

Question 1031098: The length of a rectangle is the width minus 2 units. The area of the rectangle is 8 units. What is the length, in units, of the rectangle?
Click here to see answer by Cromlix(4381)

Question 1031236: Which quadrants contain the graph of any function f(x) = ax^2 + bc + c if a < 0 and the discriminant D < 0?
Click here to see answer by robertb(5830)

Question 1031237: How many zeros are there for any quadratic function whose discriminant is zero?
Click here to see answer by josgarithmetic(39613)

Question 1031237: How many zeros are there for any quadratic function whose discriminant is zero?
Click here to see answer by robertb(5830)

Question 1031240: Find the y- intercept of each function algebraically
f(x) = 1/2 (x - 4)^2 - 11

Click here to see answer by JulietG(1812)

Question 1031239: f(x) = 1/4 (x - 5)^2 + 3
Click here to see answer by solver91311(24713)

Question 1031235: The B & J co. wants to produce items at a minimum cost to the company. The cost of the items is modeled by the function C(x) = x^2 - 140 x + 5700, where x is the number of items produced.
A.) How many items should the company produce to keep the cost to a minimum?
B.) What is the minimum cost?
C.) When would the company have a cost of $0?
Click here to see answer by josmiceli(19441)

Question 1031343: A ball is thrown straight up from a rooftop 300 feet high. The formula h = -16t^2 + 20t + 300 describes the ball�s height above the ground, h, in feet, t seconds after it was thrown. The ball misses the rooftop on its way down and eventually hits the ground. How long will it take for the ball to hit the ground?
Click here to see answer by Alan3354(69443)

Question 1031330: The roof of a home rises vertically a distance of 12 ft through a horizontal distance of 17 ft. Find the pitch (slope) of the roof.

Click here to see answer by Rodman1(1)

Question 1031407: Complete the following steps in order to determine whether c feet of fencing will enclose more area when arranged as a square or as a circle.
A.) Express the length of a side of a square (s) and of the radius of a circle (r) in terms of c.
B.) Express the area of the square and of the circle in terms of x
C.) Which area is larger? Justify your answer
Click here to see answer by Theo(13342)

Question 1031429: Write a quadratic equation and solve
Find two integers such that the first is 2 more than twice the second and their product is 112.
Click here to see answer by mananth(16946)

Question 1031473: Determine the vertex of the graph of the quadratic function f(x) =x2+ x + 5/4
Click here to see answer by Fombitz(32388)

Question 1031473: Determine the vertex of the graph of the quadratic function f(x) =x2+ x + 5/4
Click here to see answer by Boreal(15235)

Question 1031481: Find the zeroes of the function algebraically f(x) =2x2-3x-20
Click here to see answer by josgarithmetic(39613)

Question 1031481: Find the zeroes of the function algebraically f(x) =2x2-3x-20
Click here to see answer by MathTherapy(10549)

Question 1031520: You are completing your science project for school and you need 4 gallons of water from the river. you have a 3 gallon bucket and a 5 gallon bucket. How can you accurately measure 4 gallons of water, if you only have 3 and 5 gallon buckets? Write the steps to complete this task.
Click here to see answer by Alan3354(69443)

Question 1031539: A model rocket is launched with an initial upward velocity of
57/ms
. The rocket's height
h
(in meters) after
t
seconds is given by the following.
=h−57t5t2

Click here to see answer by Alan3354(69443)

Question 1031595: Write a quadratic equation and solve
The area of a rectangular piece of concrete is 120 ft^2, and its perimeter is 46 ft. What are the dimensions of the rectangle?
Click here to see answer by josgarithmetic(39613)

Question 1031601: Write a quadratic equation and solve
Find two integers whose difference is 19 and whose product is -84
Click here to see answer by josgarithmetic(39613)

Question 1031609: Write a quadratic equation and solve
Mr. Tobias runs a hot dog distribution warehouse that distributes hot dog to local grocery stores. The amount of profit he makes depends on the number of boxes of hot dogs he sells. The profit follows the equation P(x) = -x^2 + 140x - 3940. What is his maximum profit, and how many boxes must he sell to make the maximum profit?
Click here to see answer by stanbon(75887)

Question 1031714: You arrive at a model rocket competition only to discover that you left your small solid fuel engines at home. in a fit of anger, you throw the engine-less rocket straight up in the air. the rocket leaves your hand 6 feet above the ground with an initial throw velocity of 45 feet per second. realizing that you will need the rocket for future competitions, you catch the rocket when it falls back to a height of 5 feet. for how many seconds was the rocket in the air? what formula gives us this information?

Click here to see answer by ankor@dixie-net.com(22740)

Question 1031827: On March 12 Henry rented a van with a full tank of gas and 16,009.0 miles on the odometer. On
March 15 he returned the van with 16,280.8 miles on the odometer. The rental agency charged
Henry $99 for the rental and needed 11 gallons to fill up the tank. What was the van's rate of gas
consumption in miles per gallon?
A)24.7 miles/gallon
B)0 miles/gallon
C)36.4 miles/gallon
D)271.8 miles/gallon
Click here to see answer by josmiceli(19441)

Question 1031858: Solve the literal equation for the specified variable.
P=2L+2W for W
A)W=d-2L
B)W=P-2L/2
C)W=P-L
D)W=P-L/2

Click here to see answer by stanbon(75887)

Question 1031858: Solve the literal equation for the specified variable.
P=2L+2W for W
A)W=d-2L
B)W=P-2L/2
C)W=P-L
D)W=P-L/2

Click here to see answer by mananth(16946)

Question 1030778: A ball is thrown upward with an initial velocity of 64 feet/ sec. using h(t)= 64 t-16 t where h(t) is the height of the ball (feet) at any time second.
find the maximum height the ball will reach ?

Click here to see answer by fractalier(6550)

Question 1031921: Hello,
I�d like some help with this please. Could someone tell me if I have this correct and help me with the last steps of factoring into binomials and using the zero product property?
Thank you!
Phoebe

The length of a rectangular window is 5 feet more than its width. The area of the window is 36 square feet. Find both the length and width of the window.
What equation can be used to find the dimensions of the window?
Put that equation in standard form.
Factor the quadratic into two binomials.
Use the zero product property to solve the equation.
2w+(2w+5)=36
4w^+10w-36=0
Am I on the right track so far?

Click here to see answer by josgarithmetic(39613)

Question 1031944: The area of a rectangle is (y2 - 8y + 15) square inches. Which expression represents a possible length for the rectangle
Click here to see answer by arshiiiii(4)

Question 1031943: The area of a rectangle is (y2 - 8y + 15) square inches. Which expression represents a possible length for the rectangle
Click here to see answer by addingup(3677)

Question 1031989: Please help solve this quadratic equation using the quadratic forumla.

Click here to see answer by mananth(16946)

Question 1031995: If a quadratic equation has the discriminant of 16, what is NOT true about its solutions?
All solutions are rational numbers
All solutions are real numbers
All solutions are integers
There are two solutions
Click here to see answer by richard1234(7193)

Question 1032028: Please help me solve this quadratic equation using the quadratic formula.
0.4x^2 + x -0.3 = 0
A.)
B.)
C.)
D.)

Click here to see answer by stanbon(75887)

Question 1032032: Need help solving this quadratic equation using the quadratic formula.

A.)
B.)
C.)
D.)
Thanks!
Click here to see answer by fractalier(6550)

Question 1032034: How many solutions does a quadratic equation have with the discriminant of -3?
0
1
2
3
ty(:
Click here to see answer by fractalier(6550)

Question 1032091: The product of two consecutive positive even intergers is 14 more than their sum. Set up an equation that can be used to find the two numbers and solve it.
Click here to see answer by ankor@dixie-net.com(22740)

Question 1032105: Using The Quadratic Formula, how could you determine the amount of time it would take for a diver to touch water after leaping off the platform.
Here's an example equation
the height of a diver in meters above the pool after seconds can be approximated by the equation

Click here to see answer by josmiceli(19441)

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, 17551..17595, 17596..17640, 17641..17685, 17686..17730, 17731..17775, 17776..17820, 17821..17865, 17866..17910, 17911..17955, 17956..18000, 18001..18045, 18046..18090, 18091..18135, 18136..18180, 18181..18225, 18226..18270, 18271..18315, 18316..18360, 18361..18405, 18406..18450, 18451..18495, 18496..18540, 18541..18585, 18586..18630, 18631..18675, 18676..18720, 18721..18765, 18766..18810, 18811..18855, 18856..18900, 18901..18945, 18946..18990, 18991..19035, 19036..19080, 19081..19125, 19126..19170, 19171..19215, 19216..19260, 19261..19305, 19306..19350, 19351..19395, 19396..19440, 19441..19485, 19486..19530, 19531..19575, 19576..19620, 19621..19665, 19666..19710, 19711..19755, 19756..19800, 19801..19845, 19846..19890, 19891..19935, 19936..19980, 19981..20025, 20026..20070, 20071..20115, 20116..20160, 20161..20205, 20206..20250, 20251..20295, 20296..20340, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 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