Questions on Algebra: Quadratic Equation answered by real tutors!

Tutors Answer Your Questions about Quadratic Equations (FREE)

Question 123857: how do you express f(x)=-3(x-2)^2+5 in standard form? What formula do you use?
Click here to see answer by solver91311(24713)

Question 123828: Solve.
x squared + 7 = 15
Click here to see answer by chitra(359)

Question 123863: A right triangle has a height 8cm more than twice the base. If the area of the triangle is 96cm^2, what are the dimensions of the triangle?
Click here to see answer by solver91311(24713)

Question 123886: directions: find the roots of the quadratic equation y=x^2+7x-18 by factoring. choose the correct answer. A)7,9 B)9,2 C)-7,-9 D)-9,2. which one is the answer?
Click here to see answer by chitra(359)

Question 123885: directions: find the roots of the quadratic equation y=x^2+7x-18 by factoring. choose the correct answer. A)7,9 B)9,2 C)-7,-9 D)-9,2. which one is the answer?
Click here to see answer by chitra(359)

Question 123884: directions: find the roots of the quadratic equation y=x^2+3x+2 by factoring. choose the correct answer. A)1,-2 B)-2,-1 C)0,-2 D)1,-1. which one is correct?
Click here to see answer by chitra(359)

Question 123883: directions: write the quadratic equation for the set of roots 4,-6. choose the correct answer. A)x^2+24x+10 B)x^2-2x-24 C)x^2-24x-2 D)x^2+2x-24. which one is correct?
Click here to see answer by applesrbest(7)

Question 123835:
Find the axis of symmetry of y = -x squared - 6x + 2
Click here to see answer by bucky(2189)

Question 123941: Avoing a collision. a car is traveling on a road that is perpeendicular to a railroad track.when the car is 30 meters from the crossing,the cars new collision detector warns the driver that 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 solver91311(24713)

Question 123953: y=-x^2+3x-3
Click here to see answer by solver91311(24713)

Question 123952: y=-x^2+1
x | y
______
-2 |
______
-1 |
______
0 | 1
______
1 |
______
2 |
Click here to see answer by solver91311(24713)

Question 123975: Decide all values of b in the following equations that will
give one or more real number solutions.
1. 3x^2+bx-3=0
2. 5x^2+bx+1=0
3. -3x^2+bx-3=0
4. Write a rule for judging if an equation has solutions by looking at it in standard form.
Click here to see answer by checkley71(8403)

Question 123986: Solve the following quadratic equations. (x - 1)^2 = 7
Click here to see answer by checkley71(8403)

Question 123826: A bus company has 4000 passengers daily, each paying a fare of $2. For each $.015 increase, the company estimates that it will lose 40 passengers per day. If the company needs to take in $10,450 per day to stay in business, what fare should be charged?

The answer supposedly should be $2.75 ???
Click here to see answer by ankor@dixie-net.com(22740)

Question 124010:
Solve the following quadratic equation. 4x^2-8x-2
Click here to see answer by checkley71(8403)

Question 124043: A grocery store is selling ground beef for $1.89 per pound
How much does it cost to buy 2.5 pounds? Round your answer to the nearest cent.
Click here to see answer by stanbon(75887)

Question 124065: Solve.
(x + 7)squared = 13
Click here to see answer by stanbon(75887)

Question 124284: Graph the quadratic equation after completing the given table of values.
y = �x^2 + 1
x y
�2 -3
�1 0
0 1
1 2
2 5
First did I do the table right? And I have no idea how to graph this on the computer.
Click here to see answer by Fombitz(32388)

Question 124292: Solve the following quadratic equation by completing the square.
2x^2+10x+11=0
Click here to see answer by jim_thompson5910(35256)

Question 124292: Solve the following quadratic equation by completing the square.
2x^2+10x+11=0
Click here to see answer by edjones(8007)

Question 124292: Solve the following quadratic equation by completing the square.
2x^2+10x+11=0
Click here to see answer by stanbon(75887)

Question 124289: Solve the following quadratic equation by completing the square. I get the first part then i get lost, please help me. x^2-6x-3=0
Click here to see answer by edjones(8007)

Question 124289: Solve the following quadratic equation by completing the square. I get the first part then i get lost, please help me. x^2-6x-3=0
Click here to see answer by jim_thompson5910(35256)

Question 124287: The height h in feet of an object after t seconds is given by the function
h = �16t^2 + 30t + 3. How long will it take the object to hit the ground? Round your answer to the nearest thousandth
Click here to see answer by jim_thompson5910(35256)

Question 124298: Use the quadratic formula to solve the following quadratic equation.
2x^2-5x=3
Click here to see answer by jim_thompson5910(35256)

Question 124302: Use the quadratic formula to solve the following quadratic equation.
3x^2-2x+1
Click here to see answer by jim_thompson5910(35256)

Question 124322: Write the equation y=-1/3x^2+6x+2 in transformational form . State the vertex :)
Click here to see answer by stanbon(75887)

Question 124223: The height h in feet of an object after t seconds is given by the function
h = �16t^2 + 30t + 3. How long will it take the object to hit the ground? Round your answer to the nearest thousandth.
Click here to see answer by ankor@dixie-net.com(22740)

Question 124354: solve the equation by completing the square. . my answer was . am i correct?
Click here to see answer by Edwin McCravy(20054)

Question 124353: solve the equation by completing the square. t^2-12t+20=0. how do i solve it?
Click here to see answer by jim_thompson5910(35256)

Question 124453: x2+y4=3(z+h)h
how many variables does the equation contain?
Click here to see answer by rapaljer(4671)

Question 124470: The members of a flying club plan to share equally the cost of $200000 airplane. The members want to find five more people to join the club so that the cost per person will decrease by $2000. How many members are curently in the club?
Click here to see answer by checkley71(8403)

Question 124469: Suppose Charle O'Brian hits a baseball straight upward at 150 ft/sec from a height of 5 ft.
Use the formula to determine how long it takes the ball to return to the earth.

Click here to see answer by bucky(2189)

Question 124352: solve the equation by completing the square. my equation r^2-6r=0. how do i solve it?
Click here to see answer by checkley71(8403)

Question 124351: solve the equation by completing the square. x^2+8x-13=0. my answer was (-4)+(rad)29 (with a line under the +). am i correct?
Click here to see answer by ankor@dixie-net.com(22740)

Question 124344: directions: use quadratic equation x=-b+(rad)(b^2-4ac)/2a to find theroots of the equation x^2-3x+2=0.(the plus sign by the b has a line under it). i can have one of four answers. A)2 B)2,1 C)-1,-2 D)1,1 1/2. which one is correct?
Click here to see answer by ankor@dixie-net.com(22740)

Question 124667: An art dealer sold two artworks for $1520 thereby making a profit of 25% on the first work and 10% on the other, whereas if he had approached any exhibition he would bave sold them together for $1535 with a profit of 10% on the first and 25% on the other artwork. Find the actual cost of each artwork.
Click here to see answer by ankor@dixie-net.com(22740)

Question 124744: A professor started a project with a group of students, 60% of whom were boys. Due to sme unavoidable reasons, six girls could not turn up, so the professorhad to make some changes in the grou. He admitted six boys. In doing so, the percentage of boys in the project increased to 75%. Find the number of boys and girls involvedin the project initially.
Click here to see answer by ankor@dixie-net.com(22740)

Question 124882: What three techniques can be used to solve a quadratic equation? Demonstrate these techniques on the equation "12x2 - 10x - 42 = 0."
Click here to see answer by stanbon(75887)

Question 124923: Write the equation of the line with slope and y-intercept (0, 3).
Click here to see answer by stanbon(75887)

Question 124917:
Given f(x) = �x3 � 3x2 + 3x + 7, find f(�1), f(0), and f(2)
Click here to see answer by checkley71(8403)

Question 124916: Graph f(x) = 3x + 2.
Click here to see answer by jim_thompson5910(35256)

Question 124999: Jane invested some amount at the rate of 12% simple interest and some other amount at 10% simple interest. She received yearly interest of $130. Randy also invested, and received $4 more as interest. How much amount did each of them invest at differen rates?
Click here to see answer by checkley71(8403)

Question 125008: find two consecutive numbers whose product is 72
Click here to see answer by dolly(163)

Question 125012: find two consecutive odd numbers whose product is 255
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