Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 1116628: Log(4)x equals 1/2

Click here to see answer by MathTherapy(10551)

Question 1116628: Log(4)x equals 1/2

Click here to see answer by Alan3354(69443)

Question 1116627: Factorise : a^2-b^2-4ac+4c^2
Click here to see answer by math_helper(2461)

Question 1116627: Factorise : a^2-b^2-4ac+4c^2
Click here to see answer by Alan3354(69443)

Question 1116648: The formula F=n/4+37 relates the number of chirps,n, a cricket makes in 1 minute to the outside temperature, F, in degrees Fahrenheit. How many chirps can you expect a cricket to make in 1 minute when outside temperature is 60 degrees Fahrenheit.
My answer was 203 but I know it is wrong.
Click here to see answer by josgarithmetic(39616)

Question 1116693: Sweet Harmony Crafts has determined that when x hundred dulcimers are built, the average cost per dulcimer can be estimated by c(x) = x2 -7x+24.25, where C(x) is in hundreds of dollars. What is the minimum average cost per dulcimer and how many dulcimers should be built in order to achieve that minimum?
Please, I need help with this show work entirely.
Click here to see answer by josgarithmetic(39616)

Question 1116713: Solve T=Tf+T0e^kt for T.
Click here to see answer by ikleyn(52776)

Question 1116739: Please help me solve this equation:

How I tried: 2x - (2x+11)/5= (10x-2x+11)/5
So, (10x-2x+11)/5 - (4x-6)/11 = (7-8x)/7 equals (10x-2x+11)/5 times 385(385 is the LCM of the denominators) - (4x-6)/11 times 385 = -(7-8x)/7 times 385, which equals 770x-154x+847-140x-210=-385-440x
Now, Transposition: 770x+440x-154x-140x=-385-847+210 which equals 916x=1442
x=1 526/916
This is the wrong answer; the answer from my key book is 7. I hope you can understand my equation; I've worked it several times and can't get the right answer! I don't think I'm understanding how to work this kind of equation. I appreciate any help you can offer, if you can't understand or get the equation it's ok!

Click here to see answer by KMST(5328)

Question 1116757: div td font span {display:none} div td font::after {content: 'Ineed ur help on binomils, plz plz I am dying!'}
y = x + 7
y = 6x + 7
Solve
Click here to see answer by josgarithmetic(39616)

Question 1116759: The sum of the interior angle measures of a triangle is 180 degrees. Angle B is 3 times the measure of angle A. Angle c is 52 degrees. Write a simplified equation and find the measure of Angle B.
180-52/4 * 3=x
Click here to see answer by josgarithmetic(39616)

Question 1116760: 1/3(a-9)=12
1/3a - 3=12
a=45
Click here to see answer by josgarithmetic(39616)

Question 1116760: 1/3(a-9)=12
1/3a - 3=12
a=45
Click here to see answer by ikleyn(52776)

Question 1116762: solve for x.
2cos^2xtanx=tanx between 0≤x≤2π
Click here to see answer by greenestamps(13198)

Question 1116795: At 11am two cars started traveling toward each other from towns 315kilometers
apart. They passed each other at 2:30pm. If the rate of the faster car exceeded
the rate of the slower car by 6kilometers per hour, find the rate, in kilometers
per hour, of the faster car.
Click here to see answer by Edwin McCravy(20054)

Question 1116805: The number of integer pairs (x,y) that satisfies the equation 4x-6y = 91 is
a)0 b)1 c)2 d)3 e)4
Click here to see answer by ikleyn(52776)

Question 1116830: Write each fraction in terms of the LCM of the denominators.
2x/x^2-81
and
x-1/9x-81
Click here to see answer by josgarithmetic(39616)

Question 1116892: Write an algebraic equation for:
You need at least a score of 84% in order to get a B average. Let p be your answer.
p=84+76/2
Click here to see answer by solver91311(24713)

Question 1116924: A) given that x+y=42, y+z=67 and x+z=55, find the value of x+y+z.
B) hence, find the values of x, y and z
Click here to see answer by Fombitz(32388)

Question 1116922: Rachel wanted to estimate the fish population of a pond. Initially, she caught 200 fish, tagged them, and released them back into the pond. After two months she caught 450 fish, of which 32 of them were tagged. What is the estimate for the fish population?
Click here to see answer by josgarithmetic(39616)

Question 1117076: Two consecutive odd numbers are such that 7times the smaller subtracted from 9times the bigger gives 144.find the two numbers
Click here to see answer by Boreal(15235)

Question 1117159: Prove that the product of any matrix and it's transpose is symmetric
Click here to see answer by rothauserc(4718)

Question 1117274: how to find an area of a triangle?? �😎� LoLL XD!!!! IDEK BRO loooll
Click here to see answer by ikleyn(52776)

Question 1117304: One hot air balloon is 15 meters above the ground, and is rising at the rate of 20 m per minute. A second balloon is 195 meters above the ground and is descending at the rate of 16 meters per minute. In how many minutes will the two balloons be at the same height?
Click here to see answer by josgarithmetic(39616)

Question 1117328: Show that [ sqrt(3 + sqrt(5)) - sqrt(3 - sqrt(5))]^2 = 2
Click here to see answer by math_helper(2461)

Question 1117325: If x^2 = 1-x, find the value of the integers a and b if x^4 = ax + b
Click here to see answer by rothauserc(4718)

Question 1117310: Find the equations of the bisectors of the interior angles of the triangle bounded by the lines x=3, y=4 & x+y=2
Click here to see answer by Fombitz(32388)

Question 1117329: Solve for the following pronumerals:
a) 9^1/x = 3sqrt(3)
b) 2sqrt(6) - sqrt(2) = sqrt(a-b sqrt(3))
c) 1/ 3-sqrt(8) = a + b sqrt(2)
Click here to see answer by KMST(5328)

Question 1117331: Kaori is taking free-throw. H(d) models the basketballs height (in meters) at a horizontal distance of d meters from Kaori. What does the statement H (R)= 4 mean?
Click here to see answer by stanbon(75887)

Question 1117424: x�-xy=3
2y�+2xy=9
solve for the value of x and y
Click here to see answer by ikleyn(52776)

Question 1117474: Two dozen eggs and a loaf of bread coast K4.82.Half a dozen eggs and two loaves of bread cost K2.29.Find the cost of a loaf of bread.
Click here to see answer by stanbon(75887)

Question 1117475: There are two numbers.When four times the larger number is added to three times the smaller number,the result is 26.If three times the larger number is decreased by twice the smaller number,the result is 11.Find the numbers.
Click here to see answer by solver91311(24713)

Question 1117478: A and B are the point (3,-1) and (2,3) respectively.l is the line 8y-2x-3=0.Show that (a) l is perpendicular to AB (b) l passes through the midpoint of AB.
Click here to see answer by stanbon(75887)

Question 1117479: A = (3,-2),B=(-5,-4). Find the equation of the line parallel to AB and passing through the middle poit of AB.
Click here to see answer by josgarithmetic(39616)

Question 1117479: A = (3,-2),B=(-5,-4). Find the equation of the line parallel to AB and passing through the middle poit of AB.
Click here to see answer by solver91311(24713)

Question 1117489: Which equation should I use for this problem? Summation?
1. You are running a foundation for a certain animal which is nearly extinct. Ms. Irene, a rich benefactor, offers two options for her donations:
Option 1: To give $1,000 on day 1, $999 on day 2, $998 on day 3, with the process to end after 1,000 days.
Option 2: To give $1 on day 1, $2 on day 2, $4 on day 3, for 19 days.
What formula should I use to know which one results in more money?
Click here to see answer by ikleyn(52776)

Question 1117503: solve y if 4 [y+1]-7=-2[-8y+7]6y
Click here to see answer by solver91311(24713)

Question 1117634: A) Find the slope of the line that passes through the points (2,5) and (5,7).
B) Find the standard form of the equation of the line.
C) Find the slope-intercept form of the equation of the line.
Click here to see answer by josgarithmetic(39616)

Question 1117643: NAME THE PROPERTY WHICH SAYS THAT IF TWO INTEGER IS ADDED OR SUBTRACTED THEN IT IS ALWAYS INTEGER
Click here to see answer by ikleyn(52776)

Question 1117660: Please help me solve this equation:
What number is that, 1/5 of which is greater than 1/7 by 4
I tried working this problem several times, and couldn't get the right answer. I can't really show my work because I tried so many different things.
I don't understand how to work this problem. Also, what does it mean when it says 1/7 by 4?
I appreciate any help you can offer!
Click here to see answer by josgarithmetic(39616)

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, 30241..30285, 30286..30330, 30331..30375, 30376..30420, 30421..30465, 30466..30510, 30511..30555, 30556..30600, 30601..30645, 30646..30690, 30691..30735, 30736..30780, 30781..30825, 30826..30870, 30871..30915, 30916..30960, 30961..31005, 31006..31050, 31051..31095, 31096..31140, 31141..31185, 31186..31230, 31231..31275, 31276..31320, 31321..31365, 31366..31410, 31411..31455, 31456..31500, 31501..31545, 31546..31590, 31591..31635, 31636..31680, 31681..31725, 31726..31770, 31771..31815, 31816..31860, 31861..31905, 31906..31950, 31951..31995, 31996..32040, 32041..32085, 32086..32130, 32131..32175, 32176..32220, 32221..32265, 32266..32310, 32311..32355, 32356..32400, 32401..32445, 32446..32490, 32491..32535, 32536..32580, 32581..32625, 32626..32670, 32671..32715, 32716..32760, 32761..32805, 32806..32850, 32851..32895, 32896..32940, 32941..32985, 32986..33030, 33031..33075, 33076..33120, 33121..33165, 33166..33210, 33211..33255, 33256..33300, 33301..33345, 33346..33390, 33391..33435, 33436..33480, 33481..33525, 33526..33570, 33571..33615, 33616..33660, 33661..33705, 33706..33750, 33751..33795, 33796..33840, 33841..33885, 33886..33930, 33931..33975, 33976..34020, 34021..34065, 34066..34110, 34111..34155, 34156..34200, 34201..34245, 34246..34290, 34291..34335, 34336..34380, 34381..34425, 34426..34470, 34471..34515, 34516..34560, 34561..34605, 34606..34650, 34651..34695, 34696..34740, 34741..34785, 34786..34830, 34831..34875, 34876..34920, 34921..34965, 34966..35010, 35011..35055, 35056..35100, 35101..35145, 35146..35190, 35191..35235, 35236..35280, 35281..35325, 35326..35370, 35371..35415, 35416..35460, 35461..35505, 35506..35550, 35551..35595, 35596..35640, 35641..35685, 35686..35730, 35731..35775, 35776..35820, 35821..35865, 35866..35910, 35911..35955, 35956..36000, 36001..36045, 36046..36090, 36091..36135, 36136..36180, 36181..36225, 36226..36270, 36271..36315, 36316..36360, 36361..36405, 36406..36450, 36451..36495, 36496..36540, 36541..36585, 36586..36630, 36631..36675, 36676..36720, 36721..36765, 36766..36810, 36811..36855, 36856..36900, 36901..36945, 36946..36990, 36991..37035, 37036..37080, 37081..37125, 37126..37170, 37171..37215, 37216..37260, 37261..37305, 37306..37350, 37351..37395, 37396..37440, 37441..37485, 37486..37530, 37531..37575, 37576..37620, 37621..37665, 37666..37710, 37711..37755, 37756..37800, 37801..37845, 37846..37890, 37891..37935, 37936..37980, 37981..38025, 38026..38070, 38071..38115, 38116..38160, 38161..38205, 38206..38250, 38251..38295, 38296..38340, 38341..38385, 38386..38430, 38431..38475, 38476..38520, 38521..38565, 38566..38610, 38611..38655, 38656..38700, 38701..38745, 38746..38790, 38791..38835, 38836..38880, 38881..38925, 38926..38970, 38971..39015, 39016..39060, 39061..39105, 39106..39150, 39151..39195, 39196..39240, 39241..39285, 39286..39330, 39331..39375, 39376..39420, 39421..39465, 39466..39510, 39511..39555, 39556..39600, 39601..39645, 39646..39690, 39691..39735, 39736..39780, 39781..39825, 39826..39870, 39871..39915, 39916..39960, 39961..40005, 40006..40050, 40051..40095, 40096..40140, 40141..40185, 40186..40230, 40231..40275, 40276..40320, 40321..40365, 40366..40410, 40411..40455, 40456..40500, 40501..40545, 40546..40590, 40591..40635, 40636..40680, 40681..40725, 40726..40770, 40771..40815, 40816..40860, 40861..40905, 40906..40950, 40951..40995, 40996..41040, 41041..41085, 41086..41130, 41131..41175, 41176..41220, 41221..41265, 41266..41310, 41311..41355, 41356..41400, 41401..41445, 41446..41490, 41491..41535, 41536..41580