Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 394049: round | players
1 | 2 what's the equation to find the nth round?
2 | 4
3 | 8
4 | 16
5 | 32

Click here to see answer by pie90010(44)

Question 393704: Find k such that x+2 is a factor of x^3-kx^2+3x+7k
Click here to see answer by robertb(4012)

Question 394153: Factor Completley
27u^3+125
Click here to see answer by mananth(12270)

Question 394159: The area of a rectangular pool is 192 square meters. The length of the pool is 4 meters more than its width.Find the length and width.
Click here to see answer by ewatrrr(10682)

Question 394220: Evaluate. Write your answers as fractions
-(5/3)^3 and 5^2/-2
Click here to see answer by MathLover1(6611)

Question 394233: 3/4x + 1 = x + 5/6 I know the answer is x=2/3 ut dont know how they got it.
Thanks
Click here to see answer by Alan3354(30939)

Question 394247: -11(x-5) = 43 -5x
Click here to see answer by MathLover1(6611)

Question 394248: On a certain field trip there were 8 times as many students as chaperons. If c represents the number of chaparons and s represents the number of students, what equation represents the given information? When answering this question, students are sometimes confused over which two equations, 8c=s or 8s=c, to use.
The correct answer is 8c=s.
But I don't know why, and my book doesnt tell me why that I can see.
Click here to see answer by TeishaRenee(14)

Question 394239: when x=2, the value of f(x)=x^2-4x+4=0. This makes (2,0)a ? ____ of the quadratic equation.
A radicand
B turning point
C maximum value
D root
Click here to see answer by ewatrrr(10682)

Question 394347: 1. The ratio of the side lengths of a quadrilateral is 6:2:3:7, and its perimeter is 126 meters. What is the length of the shortest side?
Click here to see answer by solver91311(16868)

Question 394372: Could you explain how this equation was solved?
3(x-13)-=9
x=24
Thank you!
Click here to see answer by solver91311(16868)

Question 394366: hi.
the question is 2/3x=2 and 2/9
i simplafyed it to 2/3x=20/9 but i dont know where to go from here. please help. thanks.
Click here to see answer by jim_thompson5910(28476)

Question 394423: A passenger trains speed is 60 mi/h, and a freight speed is 40 mi/h. The passenger train travels the same distance in 1.5 h less time than the freight. How long does each train take to make the trip?
Click here to see answer by stanbon(57214)

Question 394430: The standard form of a line is 4x+5y=51. Another line passes through points (5,8) and (1,3). Prove whether the second line is parallel or perpendicular to the first line.
Click here to see answer by richard1234(5390)

Question 394427: One thousand tickets were sold at a game. Adult tickets cost $8.50 while kids cost $4.50, for a total of $7,300. How many tickets of each kind were sold?
Click here to see answer by mananth(12270)

Question 394660: I am trying to understand this so that I can explain this to my kids. I homeschool and this problem is on the worksheet that they have to turn in. Thank you for your help:
A=1/2h(x+y); solve for x
Click here to see answer by ankor@dixie-net.com(15622)

Question 394656: 10x^2=3(x+6)
Click here to see answer by ewatrrr(10682)

Question 394681: what is f(t)=1/2t+2 when t=2,4,8
Click here to see answer by Alan3354(30939)

Question 394737: 8(x-5)/3= 2(x-4) i need help solving this and if you could break it down step by step for me please
the answer is suppose to be x=8
Click here to see answer by MathLover1(6611)

Question 394741: Solve the equation.
x^2 + 144 = 0
Click here to see answer by ewatrrr(10682)

Question 394758: Choose the equation in slope-intercept form for the line passing through each pair of points.
(–1, 3) and (2, –5)
Click here to see answer by ewatrrr(10682)

Question 394758: Choose the equation in slope-intercept form for the line passing through each pair of points.
(–1, 3) and (2, –5)
Click here to see answer by josmiceli(9645)

Question 394769: (7+9i) + (4-15i)
Click here to see answer by ewatrrr(10682)

Question 394808: When evaluating the question f(4)= -x^2 will it become f(4)=-(4)^2 = -16 OR f(4)=-(4)^2 = 16 ?
Click here to see answer by stanbon(57214)

Question 394708: 7y+4=3-2y

Click here to see answer by jim_thompson5910(28476)

Question 394664: 1. find the range of f(x)-2x^2+4 for the domain (-3,0,2)
2.given the arithmetic sequence A(n)=5+(n-1)d. Find the first and third terms if the common difference is 2.
3.given a Geometric sequence, A(n)=A=(1)r^n-1. Find the following terms if the first term is 3 and the common ratio is -2. Find the first, second and third term.
4. What is the slope of the line through the points (-1,2) and (2,-3).
5. A=1/2h(x+); solve for x.
6. Which of these equations is a direct variation? What is the constant of variation for those that are a direst variation? (a) y=x/2,(b)3x-5y=0 (c)y=4-x
7. Tell whether the lines for the pair of equations are parallel, perpendicular or neither: y=(-1/3)x-5, -18x+6y=21
8. Write the equation of a line in slope-intercept form that is perpendicular to the given line and that passes through the given point: y=(2/5)x+6;(-4,8)
9. find the x and y intercepts of the line 7x+6y=14
Click here to see answer by edjones(7569)

Question 394898: this is a d=rt problem Tina get a head start and leave work traveling at 45 mph three hour later Tim leaves work on the same road at 65 mph.how many mile will Tim pass Tina?
Click here to see answer by mananth(12270)

Question 393896: what's (x+3x+6x=180)
Click here to see answer by jjordan95(63)

Question 394997: Perimeter of a square. How do I find the perimeter of a square with sides of length X-8?
Click here to see answer by ewatrrr(10682)

Question 395002: F=9/5C + 32 for L is what? Please help.
Click here to see answer by Alan3354(30939)

Question 394998: How do you solve A=P(1+r/n)nt to find amount?
Click here to see answer by rfer(12644)

Question 395048: A great shark has triangular teeth. Each tooth measures about 5 cm across the base and has a height of 6 cm. Find the surface of the front side of one such tooth.
Click here to see answer by EricL(29)

Question 395095: how to write 4/d without a fraction bar
Click here to see answer by jrfrunner(365)

Question 395103: Complete each ordered pair so that it satisfies the given
equation.
Y= 1.8x +22.6: (1, ), (-10, ), ( , 22.6)

Click here to see answer by stanbon(57214)

Question 395118: solve for x using addition principle x+16=-10
Click here to see answer by MathLover1(6611)

Question 395123: Solve using the addition principle 3.1=n-0.3
Click here to see answer by rfer(12644)

Question 395109: Complete each ordered pair so that it satisfies the given
equation.
y=-5x-3: (-1,? ) (-1/2, ?) ( ? , -2)
Click here to see answer by rfer(12644)

Question 395028: a 500 gram sample of an unknown material requires 750 calories of heat to raise its temperature by 50 deg. C. use equation (1) and table to identify the material. Specific Heats of Various Substances (at 20 deg.C and 1 atm) substances air (50 deg C),specific heat (cal/garms deg C) 0.25 ,Alcohol,ethyl, specific heat (cal/g deg C) 0.58, this should help me figure out the rest of them on my own thank you
Click here to see answer by scott8148(6628)

Question 395089: a family decides to build a small basketball court so thier children can play at home. A concrete pad is to be poured that is 1/2 ft thick, and has dimensions of 15ft by 15 ft. One cubic yard is equivalent to 27ft cubed. How many cubic yards of concrete must be poured?
Click here to see answer by mananth(12270)

Question 395340: Solve using the addition principle x+1/13=5/13. The solution is X=??
Click here to see answer by ewatrrr(10682)

Question 395342: Solve using the multiplication principle.....-x/3=9
Click here to see answer by EricL(29)

Question 395347: What is the y-intercept of: y=0.15x+0.79
Click here to see answer by jim_thompson5910(28476)

Question 395337: 3/4x-3/2=9/5-1/10x
Click here to see answer by jim_thompson5910(28476)

Question 395298: 2(n-7)+3=9

Click here to see answer by jim_thompson5910(28476)

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