Questions on Algebra: Equations answered by real tutors!

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Question 910339: M=L(1-n)
Click here to see answer by Fombitz(32388)

Question 910496: The average weight of Bob, John and Danny is 70 lbs. If Bob and Danny weigh 145 lbs total, how much does John weigh?
Help show work and expalin plz
Click here to see answer by JoelSchwartz(130)

Question 910586: If you invest P dollars (P is for principal) at simple interest rate R for T years, the amount of interest you will earn is given by the formula I=P⋅R⋅T. Find I if
P = $2000, R = 3100, and T = 2 years
You will earn $__ in interest.
Click here to see answer by stanbon(75887)

Question 910590: If you invest P dollars (P is for principal) at simple interest rate R for T years, the amount of interest you will earn is given by the formula I=P⋅R⋅T. Find I if
P = $2000, R = 3/100, and T = 2 years
You will earn $__ in interest.
Sorry I forgot to add a slash bc it is three and one hundreths!
Click here to see answer by stanbon(75887)

Question 910623: for the equation 3x+8y-7=o, find the missing coordinate of the ordered pair so that it is a solution ( ,5)
Click here to see answer by josgarithmetic(39616)

Question 910627: Solve the equation of possible.
-7 (t-3) +4t = 3(7+t)
When I first did the problem, I got the null set as my answer, but my teacher marked it wrong. Now, I'm confused.
Click here to see answer by josgarithmetic(39616)

Question 910762: Hello,
Which of the following is equivalent to
in(x^2y/5)
a)in x y - in 5
b)(in x)^2 - in y/5
c)in(2x + y - 5)
d)2 in x + in y - in 5
Click here to see answer by stanbon(75887)

Question 910762: Hello,
Which of the following is equivalent to
in(x^2y/5)
a)in x y - in 5
b)(in x)^2 - in y/5
c)in(2x + y - 5)
d)2 in x + in y - in 5
Click here to see answer by ewatrrr(24785)

Question 910799: i would be grateful if someone could help me answer the following question.
S=2x/3+6

Change the subject of the formula to x.
Click here to see answer by ewatrrr(24785)

Question 910827: When solving the following;
Click here to see answer by richwmiller(17219)

Question 910951: Hi....I'm stuck on this problem. If you can help, I would really appreciate it. Thank you
V = Sx/3

Also.....
(a + b)x/2 = S
Click here to see answer by richwmiller(17219)

Question 910997: The membership fee for joining a garden association is $24 per year local botanical garden charges members of the gardening Association three dollars for admission to the garden.Nonmembers of the association are charged six dollars. After how many visits to the garden is a total cost members including the membership fee the total cost for nonmembers
Click here to see answer by rfer(16322)

Question 911073: What's 5x+2=3x?

Click here to see answer by jim_thompson5910(35256)

Question 911107: XY=14 and x+y=9 then x-y=

Click here to see answer by anirudhreddy(2)

Question 911128: Factorise m^2-2m
Click here to see answer by mananth(16946)

Question 911195: How do you do this problem please?
5xn=40
Click here to see answer by ewatrrr(24785)

Question 910521: Show that 4x - 7 is equivalent to 4(x - 1) - 3 when x = 3.
Click here to see answer by Fombitz(32388)

Question 911352: Average movie prices in the United States are, in general, lower than in other countries. It would cost $81.15 to buy three tickets in Japan plus two tickets in Switzerland. Three tickets in Switzerland plus two tickets in Japan would cost $77.20. How much does an average movie ticket cost in each of these countries.
Click here to see answer by lwsshak3(11628)

Question 911414: Solve each equation for x.
x-10=23

Click here to see answer by MathLover1(20849)

Question 911422: One music download store charges a monthly fee of $10 plus $1 per song downloaded. Another music download store charges a monthly fee of $30 for all the songs you want to download.
a. How many songs would you have to download from the first store for the cost to be the same as the second store?
b. If you only download 15 songs per month, from which download store would you buy your music?

Please help me write the first line as an equation, I have tried and gotten s-10 = 30s.
Click here to see answer by richwmiller(17219)

Question 911454: f(x)=5x-4
f(4a)=80
what is a equal to?
Click here to see answer by MathLover1(20849)

Question 911479: -2(5x + 4)/ 3 = -3(3x + 2) - 7/3
Help!
Click here to see answer by rfer(16322)

Question 911408: 4x+10=-26

Click here to see answer by rfer(16322)

Question 911493: Joe needs to make a drink that is 40% juice. How much of a 10% juice solution should he add to 100 milliliters of 100% grape juice to obtain the 40% mixture
Click here to see answer by josgarithmetic(39616)

Question 911531: Okay, I need help with alot of mine, but I just need to see how you work it out. 2x + 2 = 5x - 7
Please Help!!
Click here to see answer by Alan3354(69443)

Question 911406: Calculate the average rate of change of y=4x�+3x+5 between x=2 and x=5.
Click here to see answer by Fombitz(32388)

Question 911667: A boat crew that can row at a rate of 8 miles per hour in still water has found that it takes 1.5 times as long to row any specified distance upstream as it does to row the same distance downstream. What is the rate of the current in miles per hour?
Click here to see answer by josgarithmetic(39616)

Question 911705: find three consecutive even integers, such that 3 times the middle integer is 4 more than the sum of first and third
A.1,2,3
B.3,5,6
C.2,4,6
D.6,8,10

Click here to see answer by richwmiller(17219)

Question 911704: write the equaton of the line that passes through (-3,-4)and (2,-4) in the form y=mx+b.
A. y=-4
B. y=4
C. y=1/5x-18/5
D. y=1/5x-23/5
Click here to see answer by richwmiller(17219)

Question 911761: 10(5-10^3x-5)=9
x=
Click here to see answer by MathLover1(20849)

Question 911761: 10(5-10^3x-5)=9
x=
Click here to see answer by MathTherapy(10551)

Question 911851: Describe the transformation from the graph of f(x) = x + 3 to the graph of g(x) = x − 7.
Options:
The graph g(x) = x − 7 is the result of translating the graph of f(x) = x + 3 up 10 units.
The graph g(x) = x − 7 is the result of translating the graph of f(x) = x + 3 down 4 units.
The graph g(x) = x − 7 is the result of translating the graph of f(x) = x + 3 up 4 units.
OR
The graph g(x) = x − 7 is the result of translating the graph of f(x) = x + 3 down 10 units.
Click here to see answer by ewatrrr(24785)

Question 911856: Determine if this conjecture is true. If not, give a counterexample.
Two complementary angles are not congruent.
Options:
false; m∠1 = m∠2 = 45�
false; m∠1 = m∠2 = 35�
true
OR
false; m∠1 = m∠2 = 25�

Click here to see answer by Edwin McCravy(20054)

Question 911853: Let g(x) be the transformation of f(x) = |x| so that the vertex is at (−4, 5). Identify the rule for g(x) and its graph.

Click here to see answer by stanbon(75887)

Question 911852: Question:http://my.thinkwell.com/questionbank/92001-93000/92201/img/243409.gif
Thanks!!

Click here to see answer by josgarithmetic(39616)

Question 911855: Determine if the following conjecture is true. If not, give a counterexample.
The cubic power of an odd integer is odd.
Options:
true
false; 73 = 342
false; 93 = 728
OR
false; 53 = 126

Click here to see answer by richard1234(7193)

Question 911854: Determine if this conjecture is true. If not, give a counterexample.
The sum of two negative numbers is less than −1.
Options:
false; −1 + (−1) < −1
false; 0 + (−1) = −1
false; −1/4 + (−1/4) > −1
OR
true

Click here to see answer by richard1234(7193)

Question 912055: Find the equation of each of these straight lines in the form of y=mx+c.
b) perpendicular to the line 3x+4y=5 passing through (3,-2)
Click here to see answer by mananth(16946)

Question 912133: Hi,
solve for y
2y/y-1 = 1 2/3
a)y = -5
b)y = -1
c)y = 1
d)y = 5
Click here to see answer by MathLover1(20849)

Question 912130: Hi,
find the solutions to the equation:
8x^2 - 4x -24 = 0
a)x = -2 or -3/2
b)x = -2 or 3/2
c)x = -3/2 or 2
d)x = 3/2 or 2
Click here to see answer by MathLover1(20849)

Question 912131: x+3y=19
x-y=-1
Click here to see answer by Alan3354(69443)

Question 912124: Hello,
find all solutions of
tanx = 1 on [0, 2, pi)
a)pi
b)pi/4,5pi/4
c)3pi/4, 7pi/4
d)pi/4, 3pi/4, 5pi/4, 7pi/4
Click here to see answer by ewatrrr(24785)

Question 912152: factorise x^2+px+qx+pq
factorise m^2-4
write as a single fraction in its simplest form 2/x-4-1/x+3
Click here to see answer by ewatrrr(24785)

Question 912120: -3y + 1/2 = 5/7
This is what I have done
-3y + 1/2 = 5/7 = 10/14 The 1/2's cancel each other out.
-1/2 = -1/2 = 7/14
-3y = 3/14 The -3's cancel each other out.
____ ____
-3 -3
I know that the answer should be -1/14 but I don't know how to get there.
Click here to see answer by ewatrrr(24785)

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