Questions on Algebra: Quadratic Equation answered by real tutors!

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Question 1022979: V2 - 2v
V squared - 2v
Click here to see answer by fractalier(6550) About Me 
Question 1023025: Hello my name is Juan I'm in college, but I have a big problem I have 3 questions
The question says Solve algebraically show all work put your answer on the line. For calculation and final answer, round to the nearest hundredths. Make sure your handwriting is legible to me. check your answers
solve write your solutions as ordered pairs
1) x^2+8x-12=0
I solved like this (x-6) (x-2) or (x+6)(x-2)
I have try to also solved like this

x^2+8x-12=0
x^2+8x=12
x(x+8)=12
x(x+8)-12=0/x
x+8-12=0
x-4=0
x=4 Now I don't know if this answer is correct please help me I have tried everything but I still cannot found the answer
the next question is
5x^2+19x=35
what I have tried is almost the same as the last one
5x^2+19x=35
5x(x+19)=35
x+19=35/5
x+19=7
x+19-7=0
x+12=0
x=-12
and the third question is
-6x^2-x+5=0
(-1)-6x^2-x+5=0
6x-x+5=0
(6x-1)(x+5) Please help me I have seriously tried everything


Click here to see answer by Alan3354(69443) About Me 
Question 1023025: Hello my name is Juan I'm in college, but I have a big problem I have 3 questions
The question says Solve algebraically show all work put your answer on the line. For calculation and final answer, round to the nearest hundredths. Make sure your handwriting is legible to me. check your answers
solve write your solutions as ordered pairs
1) x^2+8x-12=0
I solved like this (x-6) (x-2) or (x+6)(x-2)
I have try to also solved like this

x^2+8x-12=0
x^2+8x=12
x(x+8)=12
x(x+8)-12=0/x
x+8-12=0
x-4=0
x=4 Now I don't know if this answer is correct please help me I have tried everything but I still cannot found the answer
the next question is
5x^2+19x=35
what I have tried is almost the same as the last one
5x^2+19x=35
5x(x+19)=35
x+19=35/5
x+19=7
x+19-7=0
x+12=0
x=-12
and the third question is
-6x^2-x+5=0
(-1)-6x^2-x+5=0
6x-x+5=0
(6x-1)(x+5) Please help me I have seriously tried everything


Click here to see answer by addingup(3677) About Me 
Question 1023055: Hi I need help on this question I'm struggling with. Thank you in advance!
The question is: The area of a parking lot is 2475 ft.˛. The rectangular parking lot has dimensions such that the length is 10 feet longer than the width. What are the dimensions of the parking lot?
Click here to see answer by FrankM(1040) About Me 
Question 1023081: The equation h = -16t^2 + 40t + 5 gives the height h, in feet, of a baseball as a function of time t, in seconds, after it is hit. What is the maximum height the baseball reaches?
Click here to see answer by solver91311(24713) About Me 
Question 1023151: Which value must be added to the expression x2 + 12x to make it a perfect-square trinomial?
Click here to see answer by Cromlix(4381) About Me 
Question 1023285: A ball is thrown into the air. The path of the ball is given by the quadratic formula h (t)= -4.9t^2+6.1t, where t is measured in seconds and h (t) in metres. How can i decide without completely solving this problem whether or not the ball will ever reach a height of 2 metres above the ground?
Click here to see answer by rothauserc(4718) About Me 
Question 1023568: 9x^2-65x-56
Click here to see answer by Theo(13342) About Me 
Question 1023567: 3x^2+19x+20
Click here to see answer by Alan3354(69443) About Me 
Question 1023565: 4x^2-5x-6
Click here to see answer by Alan3354(69443) About Me 
Question 1023566: 7x^2-19x-6
Click here to see answer by Alan3354(69443) About Me 
Question 1023582: Peter has $20 and Paul has $212. when they each given $x,Paul has 5 times as much as Peter. Write down an equation in x and solve it.?
Click here to see answer by FrankM(1040) About Me 
Question 1023612: To solve the following quadratic by completing the square, what value would you add to both sides of the equation?
x^2-6x+7
Click here to see answer by josgarithmetic(39613) About Me 
Question 1023612: To solve the following quadratic by completing the square, what value would you add to both sides of the equation?
x^2-6x+7
Click here to see answer by ikleyn(52754) About Me 
Question 1023612: To solve the following quadratic by completing the square, what value would you add to both sides of the equation?
x^2-6x+7
Click here to see answer by MathTherapy(10549) About Me 
Question 1023627: For what value of the constant k does the quadratic 2x^2 - 5x + k= 0 have a double root?
Click here to see answer by ikleyn(52754) About Me 
Question 1023632: The quadratic x^2+7x+20 has the same roots as the quadratic Ax^2+Bx+1. What is A+B?
Click here to see answer by ikleyn(52754) About Me 
Question 1023639: If x+y+z=7 and x^2+y^2+z^2=19, then what is the arithmetic mean (average) of the three products xy, yz, and zx?
Click here to see answer by ikleyn(52754) About Me 
Question 1023619: Hi, basically could somebody show me the steps as to how the word problem below was turned into the equation? I want to know how the quadratic equation was made step by step? The equation is at the bottom after the word problem. Many thanks
" TAHIR HAS A REGULAR CYCLE TRAINING ROUTE THAT IS 60KM LONG. IF TAHIR CYCLES 3KMH SLOWER THAN HIS RACING SPEED,IT TAKES HIM 3 HOURS AND 20 MINUTES LONGER TO COMPLETE THE ROUTE.
A) WORK OUT TAHIR'S RACING SPEED. STATE IN WORDS WHAT ALGEBRAIC METHOD YOU ARE USING AT EACH STAGE.
B) CHECK YOUR ANSWER BY USING TWO FURTHER ALTERNATIVE METHODS FOR SOLVING QUADRATIC EQUATIONS.
C) EVALUATE ALL THREE METHODS FOR EFFICIENCY AND EFFECTIVENESS.
V^2 - 3V - 54 = 0
TAHIR HAS A REGULAR CYCLE TRAINING ROUTE THAT IS 60KM LONG. IF TAHIR CYCLES 3KMH SLOWER THAN HIS RACING SPEED,IT TAKES HIM 3 HOURS AND 20 MINUTES LONGER TO COMPLETE THE ROUTE.
A) WORK OUT TAHIR'S RACING SPEED. STATE IN WORDS WHAT ALGEBRAIC METHOD YOU ARE USING AT EACH STAGE.
B) CHECK YOUR ANSWER BY USING TWO FURTHER ALTERNATIVE METHODS FOR SOLVING QUADRATIC EQUATIONS.
C) EVALUATE ALL THREE METHODS FOR EFFICIENCY AND EFFECTIVENESS."
V^2 - 3V - 54 = 0 (Please show me how the made that word problem into the equation? I know the answers are V = 9 or -6
Click here to see answer by Theo(13342) About Me 
Question 1023773: What two numbers multiplies to -8000 but add to +20?
Click here to see answer by Fombitz(32388) About Me 
Question 1023773: What two numbers multiplies to -8000 but add to +20?
Click here to see answer by msalonga(4) About Me 
Question 1023766: A circle has its center at the origin, and (5, -12) is a point on the circle. How long is the radius of the circle?
Click here to see answer by Alan3354(69443) About Me 
Question 1023904: A ball is thrown into the air with an initial upward velocity of 45 ft/s. Its height (h) in feet after t seconds is given by the function h=-16t^2 + 45t + 6. After about how many seconds will the ball hit the ground?
Click here to see answer by Alan3354(69443) About Me 
Question 1023975: Find the sum of the constants a, h, and k such that
2x^2 - 8x + 7 = a(x - h)^2 + k
for all real numbers x.
Click here to see answer by josgarithmetic(39613) About Me 
Question 1023990: what is the maximum product of two numbers whose sum is -10?
Click here to see answer by stanbon(75887) About Me 
Question 1023980: Find the vertex of the graph of the equation y = 3x^2 - 6x + 7.
Click here to see answer by stanbon(75887) About Me 
Question 1023980: Find the vertex of the graph of the equation y = 3x^2 - 6x + 7.
Click here to see answer by josmiceli(19441) About Me 
Question 1023976: Find the vertex of the graph of the equation x -y^2 + 6y =8.
Enter your submission as an ordered pair. For example: (0,1).
Click here to see answer by josgarithmetic(39613) About Me 
Question 1024003: Quadratic funtions

y+x^2=-x-2

Click here to see answer by Fombitz(32388) About Me 
Question 1024096: Introduction to Problems Solver
When 20 is subtracted from 3 times a certain​ number, the result is 40. What is the​ number?
The number is
nothing.
Click here to see answer by Cromlix(4381) About Me 
Question 1024135: find the coordinates of the vertex of the parabola
Click here to see answer by Fombitz(32388) About Me 
Question 1024183: the length of a rectangle is 2 centimeters less than its width. What are the dimensions of the rectangle if its area is 168 square centimeters?
The length of the rectangle is ___ cm.
The width of the rectangle is ___ cm.
Click here to see answer by Alan3354(69443) About Me 
Question 1024098: Q a straight length of wire is 20 cm long It is bent at right angles to form the two shorter sides of a right angled triangle.If the triangle's area is 30 cm^2, find:
1) the length of the hypotenuse 2) the triangles's perimeter.
Click here to see answer by josgarithmetic(39613) About Me 
Question 1024230: how do you write y=(x-4)(x+2) in standard form?
with the standard form of the equation use the quadratic formula to identify the x-value of the vertex. use the quadratic formula with the vertex -b/2a then substitute the x-value of the vertex into the original equation to find the y-value of the vertex then write the coordinates of the vertex. what are the 3 points to graph an parabola? PLEASE HELP
Click here to see answer by josgarithmetic(39613) About Me 
Question 1024230: how do you write y=(x-4)(x+2) in standard form?
with the standard form of the equation use the quadratic formula to identify the x-value of the vertex. use the quadratic formula with the vertex -b/2a then substitute the x-value of the vertex into the original equation to find the y-value of the vertex then write the coordinates of the vertex. what are the 3 points to graph an parabola? PLEASE HELP
Click here to see answer by MathTherapy(10549) About Me 
Question 1024230: how do you write y=(x-4)(x+2) in standard form?
with the standard form of the equation use the quadratic formula to identify the x-value of the vertex. use the quadratic formula with the vertex -b/2a then substitute the x-value of the vertex into the original equation to find the y-value of the vertex then write the coordinates of the vertex. what are the 3 points to graph an parabola? PLEASE HELP
Click here to see answer by robertb(5830) About Me 
Question 1024238: how do you write y=(x-4)(x+2) in standard form?
with the standard form of the equation use the quadratic formula to identify the x-value of the vertex. use the quadratic formula with the vertex -b/2a then substitute the x-value of the vertex into the original equation to find the y-value of the vertex then write the coordinates of the vertex. what are the 3 points to graph an parabola? PLEASE HELP
Click here to see answer by josmiceli(19441) About Me 
Question 1024238: how do you write y=(x-4)(x+2) in standard form?
with the standard form of the equation use the quadratic formula to identify the x-value of the vertex. use the quadratic formula with the vertex -b/2a then substitute the x-value of the vertex into the original equation to find the y-value of the vertex then write the coordinates of the vertex. what are the 3 points to graph an parabola? PLEASE HELP
Click here to see answer by MathTherapy(10549) About Me 
Question 1024292: y2 - 18y + 4 = 70


Line 1
y^2 - 18y = 66
Line 2
y^2 - 18y + 81 = 66
Line 3
(y - 9)^2 = 66
Line 4
y - 9 = ą √66
Line 5
y = 9 ą √66
Click here to see answer by Alan3354(69443) About Me 
Question 1024295: Find the value of c that would make x^2 + cx + 144 a perfect square.
6
12
24
72
Click here to see answer by stanbon(75887) About Me 
Question 1024288: Which answer shows the next correct step for solving the quadratic equation by taking the square root of both sides?

g^2 - 8g + 16 = 2
(g - 4)^2 = 2
√(g - 4)^2 = √2
g - 4 = √2
|g - 4| = √2
|g - 4|= ą2
ąg - 4 = √2
Click here to see answer by Alan3354(69443) About Me 
Question 1024337: Which statement best describes why there is no real solution to the quadratic equation y = x^2 - 6x + 13?
The value of (-6)2 - 4 • 1 • 13 is a perfect square.
The value of (-6)2 - 4 • 1 • 13 is equal to zero.
The value of (-6)2 - 4 • 1 • 13 is negative.
The value of (-6)2 - 4 • 1 • 13 is positive.
Click here to see answer by Fombitz(32388) About Me 
Question 1024336: The perimeter of rectangle ABCD is 42 cm and the area is 80 cm^2. Which equation can be used to find the dimensions of the rectangle? (Hint: Set up a system of equations).
xy + 2x + 2y = (42)(80)
x2 + 80x - 42 = 0
x2 - 42x + 80 = 0
x2 - 21x + 80 = 0
Click here to see answer by ikleyn(52754) About Me 
Question 1024336: The perimeter of rectangle ABCD is 42 cm and the area is 80 cm^2. Which equation can be used to find the dimensions of the rectangle? (Hint: Set up a system of equations).
xy + 2x + 2y = (42)(80)
x2 + 80x - 42 = 0
x2 - 42x + 80 = 0
x2 - 21x + 80 = 0
Click here to see answer by Fombitz(32388) About Me 
Question 1024359: Write a quadratic equation with no real solutions. Explain how you know there are no solutions.
Click here to see answer by Alan3354(69443) About Me 
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