Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 131943: I need help with this problem. Thank you for your help!
Solve (h=16t^2 + vt + s) for t
Click here to see answer by solver91311(24713)

Question 131948: the sum of the lengths of the two legs of a right angle triangle is 14 cm. find the length of the shortest hypotenuse.
Click here to see answer by checkley71(8403)

Question 131950: a factory measuring 80m by 60m is to be surrounded be a sidewalk uniform in width. if the area of the factory is doubled by extending all sides, what is the width of the sidewalk(round to the nearest tenth)?
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Question 131940: If a basketball player has a vertical leap of about 35 inches, what is his hang tome?Hang time function is v=48T^2
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Question 131939: If a basketball player has a vertical leap of about 35 inches, what is his hang tome?Hang time function is v=48T^2
Click here to see answer by checkley71(8403)

Question 131888: The problem states to graph the quadratic equation. It also states to label the ordered pairs for the vertex and the y-intercept. The equation reads:
y = x^2 + x - 2
Any help would be greatly appreciated. Thanks!
Click here to see answer by checkley71(8403)

Question 131887: The problem states to graph the quadratic equation. It also states to label the ordered pairs for the vertex and the y-intercept. The equation reads:
y = x^2 + x - 2
Any help would be greatly appreciated. Thanks!
Click here to see answer by checkley71(8403)

Question 131963: Please help me solve this problem. Thank you very much!
(4)/(m^2-7)=1
Click here to see answer by rapaljer(4671)

Question 131997: Find the standard form of the equation for the parabola having a vertex (-3,6) that contains the origin
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Question 131997: Find the standard form of the equation for the parabola having a vertex (-3,6) that contains the origin
Click here to see answer by stanbon(75887)

Question 131978: I have a problem with factoring. I don't know how to do it. I just need to know how to factor this problem then I think I can do the rest. The directions say solve each inequality algerbraically.
16. 25x2-40x+16<0

24. x3+2x2-3x>0
Thank you
Tara
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Question 131986: x2-3x-4=0
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Question 131941: Find the variation constant and an equation of variation where y varies directly as x and y80 when x=10
THe variation constant is K=
The equation of variation is y=
Click here to see answer by bucky(2189)

Question 132066: I need help solving the a word problem. The prefessor was able to give a breaksown of the two equations that will solve the word problem. Can you help me solve these by the substitution method? Thank you!
1.25x=1.10y=1520
and
1.10x+1.25y=1535
Click here to see answer by josmiceli(19441)

Question 132089: The area of a cylinder is 14 inches.What do I use to find it circumference?
Click here to see answer by stanbon(75887)

Question 132084: Find the vertex, line of symmetry, the maximum/minimum value of f(x). Then, graph the function.
f(x) = -2(x+1)^2 + 8
Vertex is
Line of symmetry
Max/min value
Click here to see answer by josmiceli(19441)

Question 132098: An electric company is placing utility poles along a road. It is determined that 5 fewer poles per kilometre would be necessary if the distance between the poles were increased by 10metres. How many poles are being placed each km?
Click here to see answer by josmiceli(19441)

Question 132081: This is not from a textbook.
Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2 + bx + c = 0
solution: 7, only solution
Equation is 0 = ___________
I'm just starting to be able to understand how to compute these kind of equations so to do it backwards is confusing me totally.
Click here to see answer by stanbon(75887)

Question 132106: I need help solving these two seperate problems by using the substitution method. Can anybody help?
1. 1.25x+1.10y=1520
2. 1.10x+1.25y=1535
Please somebody help me!
Click here to see answer by solver91311(24713)

Question 132115: I have no idea how to do the following please help!
Suppose that a market research company finds that a price of p=$20, they would sell x=42 tiles each month. If they lower the price to p=$10, then more people would purchase teh tile, and they can expect to sell x=52 tiles in a month's time. Find the equation of the line for the demand equation. Write your answer in the form p=mx+b.
(write the equation using two points in the form(x,p)

Click here to see answer by stanbon(75887)

Question 132119: Areas of 2 rectangles are 15 sq.cm and 60 sq.cm.What is the ratio from the 1st to the 2nd.
ThanKs for the help!
Click here to see answer by rapaljer(4671)

Question 132082: Give exact and approximate solutions to 3 decimal places.
(x - 4)^2 = 81
The exact solutions are: __________
The approximate solutions are: ____________

Click here to see answer by rapaljer(4671)

Question 132120: Area of a rectangle is 15 sq.cm The length is 5 cm.What is the width?
ThanKs for the help!
Click here to see answer by rapaljer(4671)

Question 132033: The sum of two numbers is 18. If the sum of their squares is a minimum find the numbers.
Click here to see answer by solver91311(24713)

Question 132085:
Solve 2x^2 = 6 Also, find the x-intercepts of f(x) = 2x^2 - 6.

Click here to see answer by checkley71(8403)

Question 132083: Find the x-intercepts and y-intercepts for f(x).
f(x) = x^2 - 8x + 9

The x-intercepts are: 1.354 & 6.646
the y-intercepts are: 9
Thank you!
Click here to see answer by checkley71(8403)

Question 132157: I have no idea where to start.
Thank You
Television sets... What does it mean to refer to a 20in TV set or a 25 in TV set? Such units refer to the diagonal of the screen. A 10in TV set also has a width of 8 inches.
What is the height of a 10in TV? ___inches
Click here to see answer by rapaljer(4671)

Question 132153: Totally confused. Please help
If the sides of a square are lengthened by 7cm, the are becomes 225cm^2. Find the length of a side of the original square.
Yje length of a side of the original square is ____cm.
Click here to see answer by rapaljer(4671)

Question 132151: We are struggling with these problems. Thank you
Find the variation constant and an equation of variation where y varies directly as x and y=80 when x=10.
The variation constant is K=_____
The equation of variation is y=_____
Click here to see answer by rapaljer(4671)

Question 132170: If given x=3 and x= -5
write a quadratic equation
Click here to see answer by stanbon(75887)

Question 132160: hi!
my problem is now: THE DISTANCE BETWEEN THE ROAD OF A BRIDGE AND THE TOP PART OF ITS ARCH IS 3m. IF THE ARCH OF THE BRIDGE IS GIVEN BY THE EQUATION
h(x)=7x-x^2, FIND THE HEIGHT OF THE BRIDGE.
thank you!
Click here to see answer by stanbon(75887)

Question 132175: PLease help me solve this equation.I am suck.
A line is located at (1,3) and (4,-2).Where is the slope.
I got -5/3
Thank YOu!
Click here to see answer by nycsharkman(136)

Question 132177: Consider there is an entrance ramp to a doorway.G is a (0,2)and H is at (7,0)if each space on the graph paper represents 1 foot,how tall is the ramp?.Also,What is the distance from the bottom to the edge of the building?
My answer is (for the 1st question)4 ft tall
Thank You for your help AND time!
Click here to see answer by nycsharkman(136)

Question 132190: please help solve this.
this is from a text boook.
Factor 6ab-8b.
The answer i got is 2b(3a-4)is it correct?
Thank You1
Click here to see answer by josmiceli(19441)

Question 132222: Determine the nature of the solutions of the equation.
y^2 = 3/2y + 2/7
a. 1 real solution
b. 2 non-real solutions
c. 2 real solutions
I am confused about the fractions number one and how to determine how many real or non-real solutions there are. Can someone please help?
This is not from a textbook.
Click here to see answer by stanbon(75887)

Question 132223: Give exact and approximate solutions to 3 decimal places.

x^2 - 7x + 5 = 0
What are the exact solutions?
What are the approximate solutions to 3 decimal places.
I am confused with the whole problem, but also after you figure out the exact solutions how do you determine the approximate ones?
Click here to see answer by checkley71(8403)

Question 132231: 1) 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 stanbon(75887)

Question 132230: 1) the pitch of a roof is the number of feet the roof rises for each 12 feet horizontally. if a roof has a pitch of 8, what is its slope expressed as a positive number?
Click here to see answer by stanbon(75887)

Question 132221: Find the vertex, the line of symmetry, and the maximum/minimum value of f(x). Then, graph the function.
f(x) = -(x+2)^2 - 4
The vertex is:
The line of symmetry is:
The maximum/minimum value is:
Graph the function.
Click here to see answer by nycsharkman(136)

Question 132229: find the value of r so that the line that passes through each pair of the points has the given slope.
1) (r,2) (5,r), m=0
Click here to see answer by stanbon(75887)

Question 132227: find the value of r so the line that passes through each pair of the points has the given slope.
1) (1,4) (r,5), m= undefined
Click here to see answer by stanbon(75887)

Question 132226: find the value of r so the line that passes through each pair of the points has the given slope.
1) (1,4) (r,5), m= undefined
Click here to see answer by nycsharkman(136)

Question 132249: Use a commutative law to find an equivalent expression.
uv
Hi everyone I am back!! Can someone please help me with this?? I am once again taking an algebra class and not doing to well.
Click here to see answer by jim_thompson5910(35256)

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