Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 1027647: Deandre is saving money for a tv that costs $139 he has already saved $65 write and solve an addition equation to find how much more money deandre needs to save
Click here to see answer by fractalier(6550)

Question 1028051: Please help solve these system of equations?
x + y + z = �1
2x + 4y + z = 1
x + 2y � 3z = �3

Click here to see answer by Fombitz(32388)

Question 1028082: Which expression below is equivalent to 6_5x+6_3_5

Click here to see answer by fractalier(6550)

Question 1028082: Which expression below is equivalent to 6_5x+6_3_5

Click here to see answer by Alan3354(69443)

Question 1028171: Cosx-sinx
Click here to see answer by Alan3354(69443)

Question 1028171: Cosx-sinx
Click here to see answer by fractalier(6550)

Question 1028292: Hi I'm finding it hard to convert decimals.
After 4 years of investments, you earned $252.00 in simple interest. The annual rate of interest was 5.25%, how much was your initial investment principal?
I'm trying to use the formula I=PRT
252.00=P(5.25)(4)
252.00=P(21)
252/21=12
Is the initial principle $1200?
Click here to see answer by josmiceli(19441)

Question 1028271: Use completed square form, (�-18)^2 +304, to solve the equation x^2 -36� -20=0 leaving answer in exact (surd) form.
don't know where to start on this so any help would be fab. Thanks
Click here to see answer by fractalier(6550)

Question 1028469: Please help me with these 2 equations. Need to solve for F and N
Eqn 1: -1 = -10logbase10 (1+(6/F)^(2N))
Eqn 2: -96 = -10logbase10 (1+(12/F^(2N))
Please solve for F and N, or F or N. thanks
Click here to see answer by Fombitz(32388)

Question 1028635: Part of a machine moves with a velocity given by the expression:7t^2+0.8tmm/s.
Calculate the displacement over the first 5 seconds of motion.
Click here to see answer by Alan3354(69443)

Question 1028672: If 10x+2=7 What's the value of 2x
Click here to see answer by stanbon(75887)

Question 1028680: A nurse has a 60% bleach solution that she needs to add some water to so that the new bleach solution is a safer 20% bleach solution. How much water does she need to add to 8 gallons of the 60% bleach solution to result in a 20% bleach solution?
Click here to see answer by mananth(16946)

Question 1028663: Dan competed in a triathlon that covered 46.5 miles. He began by swimming at an average rate of 3mph. Then he biked at an average rate of 20 mph. And finally, he ran at an average rate of 6 mph. He spend � hour swimming, and the amount of time he spent running was an hour more than the time he spent biking. How long did she spend (a) running and (b) biking?
Click here to see answer by ankor@dixie-net.com(22740)

Question 1028729: Hi. im Michelle. im in highschool. I take math core. our teacher gave us holiday homework and I was wondering if you could maybe help me.
My question is :
Solve for x where x = < 90 degrees.

Thank you so much to whose who try to help me. I really would love your help. You are amazing and don't let anyone tell you anything different.
~Michelle1110
Click here to see answer by josmiceli(19441)

Question 1028792: Write the equation of a perpendicular bisect of AB, A(-5,3) B(-1,1) in slope intercept form
Click here to see answer by Alan3354(69443)

Question 1028904: how do i solve 6+(98-8) divided by 3+96?
Click here to see answer by rothauserc(4718)

Question 1028962: Three less than y equals 20 what is y
Click here to see answer by lp2004(2)

Question 1028985: help me to solve this two equations algebraically please 4x^2+3y^2=4 and 2x-3y^2=-3
Click here to see answer by ikleyn(52776)

Question 1028935: Expand the expression
(2z+5k)^4
using the binomial theorem and pascal's triangle.

Click here to see answer by Alan3354(69443)

Question 1029060: (4x+5)(4x-5)
Click here to see answer by ikleyn(52776)

Question 1029059: Determine the equation of an exponential function of form y=ab^x that passes through the points (2, 4.5) and (5, 121.5)
Click here to see answer by Boreal(15235)

Question 1029135: One canned juice drink is 30% orange juice; another is 5% orange juice. How many liters of each should be mixed together in order to get 25L that is 23%
orange juice?
Click here to see answer by josgarithmetic(39616)

Question 1029198: Find the maximum and minimum value of x^3=18x^2+96x
Click here to see answer by Fombitz(32388)

Question 1029273: Hi I'm trying to integrate the following equation:
(5sin2θ +2cos4θ)dθ
my answer is ((-5cos2θ)/2) + 1/2 sin4θ +c but I am unsure if this is the correct answer. Can anyone please check and if necessary point me in the right direction . Cheers
Rich
Click here to see answer by Alan3354(69443)

Question 1029280: solve by substitution x=y-1, 2x+y=10 enter answer as a coordinate form (__,__)
Click here to see answer by Fombitz(32388)

Question 1029383: when 23 is subtracted from 3 times a certain number, the result is 43. What is the number?
Click here to see answer by ikleyn(52776)

Question 1029398: A pit was 50 handbreadths in depth: A lion climbed up the pit 1/7 handbreadth every day and fell back 1/9 handbreadth. How long would it take him to get out of the pit?
Click here to see answer by fractalier(6550)

Question 1029402: if a+b=5 and a-b=-7 What is the value of a and b
Click here to see answer by fractalier(6550)

Question 1029396: Three men, each having denarii, found a purse containing 23 denarii. The first
man said to the second, �If I take this purse, I will have twice as much as you.�
The second said to the third, �If I take this purse, I will have three times as much as you.� The third man said to the first, �If I take this purse, I will have four times as much as you.� How many denarii did each man have?
Click here to see answer by fractalier(6550)

Question 1029339: 9*10*19+10*11*21+11*12*23+...49*50*99
Find the sum
Click here to see answer by Fombitz(32388)

Question 1029394: Two birds start flying from the tops of two towers 50 feet apart; one tower is 30 feet high and the other 40 feet high. Starting at the same time and flying at the same rate, the birds reach a fountain between the bases of the towers at the same moment. How far is the fountain from each tower
Click here to see answer by Boreal(15235)

Question 1029395: A merchant doing business in Lucca doubled his money there and then spent 12
denarii. On leaving, he went to Florence, where he also doubled his money and
spent 12 denarii. Returning home to Pisa, he there doubled his money and again
spent 12 denarii, nothing remaining. How much did he have in the beginning?
Click here to see answer by Fombitz(32388)

Question 1029397: A man whose end was approaching summoned his sons and said: "Divide my
money as I shall prescribe." To his eldest son, he said, "You are to have 1 bezant and a seventh of what is left." To his second son he said, "Take 2 bezants and a seventh of what remains." To the third son, "You are to take 3 bezants and a seventh of what is left." Thus he gave each son 1 bezant more than the previous son and a seventh of what remained, and to the last son all that was left. After following their father's instructions with care, the sons found that they had shared their inheritance equally. How many sons were there, and how large was the estate ?
Click here to see answer by ankor@dixie-net.com(22740)

Question 1029612: A test has 18 questions and some are worth 4 marks each and some are worth 5 marks each; the child scores 83 overall on the test. How many questions were worth 5 marks?
Click here to see answer by fractalier(6550)

Question 1029660: I need to figure share of cost of paving a private road.
The road is 1100 feet long
The cost is $30,000
There are 7 neighbors responsible for cost based on how far down the road they live.
Neighbor 1 lives 300 ft down road
Neighbor 2 lives 400 feet down the road
Neighbors 3 and 4 live 700 feet down the road
Neighbors 5,6, and 6 live 1100 feet down the road
Can you help us?
Click here to see answer by rothauserc(4718)

Question 1028694: Which expression is equivalent to �2.5(7.5 � 3x)?
Click here to see answer by fractalier(6550)

Question 1029781: Base of triangle with vertices A(2,3) B(5,2) and C(5,4) is doubled how many times bigger is the perimeter?
Click here to see answer by ikleyn(52776)

Question 1029856: I am needing the formula to solve my problem. Starting day one, you have $10,000. Each day $1000 is added..10,11,12,13 and so on, until day 365. What is the total amount accumulated from day 1 to dat 365?
Thank you

Click here to see answer by Fombitz(32388)

Question 1029936: Hi, I'm having trouble understanding and solving this problem:
f(x)= x-12/5 is shown.
Which expression is equivalent to g(x) in the equation f(g(x))=x
a.) -5/x-12
b.)5/x-12
c.)5x-12
d.)5x+12
Click here to see answer by stanbon(75887)

Question 1029903: A production line produces 15 CD players every 4 hr. How many players can it produce in 39 hr?
(A) What kind of variation applies to this situation?
(B) Solve the problem.
What kind of variation applies to this situation?
1. Direct variation
2. Inverse variation
In 39 hr, the production line can produce how many CD players?
___ CD players
Click here to see answer by stanbon(75887)

Question 1029938: Hi, I'm having trouble understanding and solving this problem:
f(x)= x^2 + 9 is shown.
Which interval of x restricts the domain of f(x) such that f^-1(x) exists?

Click here to see answer by stanbon(75887)

Question 1029978: 5x - 8+ 7x > 40
Click here to see answer by addingup(3677)

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