Questions on Algebra: Equations answered by real tutors!

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Question 1010106: 8x = 48+3y
Click here to see answer by ikleyn(52776)

Question 1010118: Identify the error in the problem.
Solve 5y-10x=15 for y.
Step 1: 5y=15+10x
Step 2: y=15+10x/5
Step 3: y=3+10x
Click here to see answer by josgarithmetic(39616)

Question 1010118: Identify the error in the problem.
Solve 5y-10x=15 for y.
Step 1: 5y=15+10x
Step 2: y=15+10x/5
Step 3: y=3+10x
Click here to see answer by MathTherapy(10551)

Question 1010142: Using Limits to Calculate a Derivative
Use the definition of the derivative to find f ′(x) if
f(x)=x^2+x
Click here to see answer by jim_thompson5910(35256)

Question 1010141: Using Limits to Calculate a Derivative
Use the definition of the derivative to find f ′(x) if
f(x)= 1/(x-1)

Click here to see answer by jim_thompson5910(35256)

Question 1010144: Write an equation of the line that passes through the points (3,5) and has a slope of 2/3.
Click here to see answer by josgarithmetic(39616)

Question 1010061: (for an annual membership fee of 500,mr.bailey can join a club that would allow him to play a round of golf for 35.without the membership,the country club charges 55 for each round of golf.how many rounds of golf could mr.bailey have to play for the cost to be the same with or without a membership?
Click here to see answer by josgarithmetic(39616)

Question 1010115: Write an equation for each situation, then identify the slope and y intercept.
a. Shaniqua rented a bike from Trevor's Bikes. It cost $14 plus $3 per hour.
b. You are setting up your Netflix account for the month. It costs you $10 to get Netflix plus $0.75 per movie you rent.
Click here to see answer by MathLover1(20849)

Question 1010165: x=14-2y and 3x-4y=2
Click here to see answer by It is costly(175)

Question 1010235: I have a bag containing red, green, blue, and white marbles and the ratio r:g:b:w is 2:2:5:7. I have 304 marbles. How many blue marbles do I have?
Click here to see answer by fractalier(6550)

Question 1010266: Find the values of the unknown by completing the square : (-1/4)x^2 - (6/4)x - 1 = 0
Click here to see answer by josgarithmetic(39616)

Question 1010288: For what value of m is 4x^2+6x+m divisible by x-3?
Click here to see answer by Boreal(15235)

Question 1010284: If m men can do a job in d days,how long will it take (m+r)?
Click here to see answer by josmiceli(19441)

Question 1010332: Solve the following equations:
3x+4(x+2)=11+7x

Click here to see answer by Boreal(15235)

Question 1010356: Find the solution set (algebraically) to the inequality below:
√(x+7)+5 < x
Click here to see answer by josgarithmetic(39616)

Question 1010338: Solve the following equations
2x^2+2x+5=
Click here to see answer by josgarithmetic(39616)

Question 1010355: Find the solution set (algebraically) to the inequality below:
√(x+7)+5 < x
Click here to see answer by Edwin McCravy(20054)

Question 1010315: find all other zeros give 2i is one zero.
f(x) = x^5 - 3x^4 + 5x^3 - 15x^2 + 4x - 12
Click here to see answer by josgarithmetic(39616)

Question 1010315: find all other zeros give 2i is one zero.
f(x) = x^5 - 3x^4 + 5x^3 - 15x^2 + 4x - 12
Click here to see answer by MathTherapy(10551)

Question 1010382: 3x-12=3x+4
Click here to see answer by addingup(3677)

Question 1010442: -5[4-(-3)(2)]=
Click here to see answer by fractalier(6550)

Question 1010442: -5[4-(-3)(2)]=
Click here to see answer by It is costly(175)

Question 1010466: Write an equation of the line that passes through the given point and in perpendicular the the given line. Your answer should be written in slope-intercept form.
P(2,-7),y-2x=-3
Thanks in advance!
Click here to see answer by fractalier(6550)

Question 1010472: The cost to install new carpet in an office is determined by a $800 fixed fee plus a fee of $70 per square yard of floor space to be covered. How many square yards of floor space can be carpeted at a cost of $2500? Round to the nearest square yard.
=sq yd
Click here to see answer by fractalier(6550)

Question 1010380: A sewing circle creates the same number of quilts every year to sell at the state fair. This year they created 3 more quilts than normal. This can be represented by y=x+3, where x is the number of quilts created in previous years and y is the total number of quilts created this year. What is the standard form of this linear equation?
Click here to see answer by fractalier(6550)

Question 1010481: what is (6.2 x 10^5) -(3 x10^2) in scientific notation
Click here to see answer by fractalier(6550)

Question 1010481: what is (6.2 x 10^5) -(3 x10^2) in scientific notation
Click here to see answer by It is costly(175)

Question 1010488: Using Limits to Calculate a Derivative
The derivative of
f(x)= 1/(x-1)
is
f(x) = -1/(x-1)^2

Click here to see answer by rothauserc(4718)

Question 1010690: 3x+4(x+2)=11+7x
Click here to see answer by fractalier(6550)

Question 1010687: Please help me solve this equation
x^2-2x+5=0
Click here to see answer by fractalier(6550)

Question 1010687: Please help me solve this equation
x^2-2x+5=0
Click here to see answer by It is costly(175)

Question 1010789: -5(1-5x)+5(-8x-2)=_4x-8x
Solve the equation

Click here to see answer by Boreal(15235)

Question 1010800: How do i solve y=1/40 (x) and y=1/60 (x) + 2 algebraically

Click here to see answer by macston(5194)

Question 1010799: How do i solve y=1/40 (x) and y=1/60 (x) + 2 algebraically

Click here to see answer by macston(5194)

Question 1010815: Four hamburgers and three orders of fries cost 4.65$. Five hamburgers and two orders of fries cost $4.85. How much does one hamburger and one order of fries cost?
Thank you!
Click here to see answer by lwsshak3(11628)

Question 1010814: Four hamburgers and three orders of fries cost 4.65$. Five hamburgers and two orders of fries cost $4.85. How much does one hamburger and one order of fries cost?
Click here to see answer by josgarithmetic(39616)

Question 1010821: Find the value of 8u-7 given that -7u-9=5
Click here to see answer by ikleyn(52776)

Question 1010709: Make n the subject formula in s=n/2[2a+(n-1)d]
Click here to see answer by Edwin McCravy(20054)

Question 1009569: Find AB and BA, if possible. (If not possible, enter IMPOSSIBLE in any single blank.)

A =
2 −4
1 4
B =

−2 4
2 −4

BA=

Click here to see answer by fractalier(6550)

Question 1010898: Please help me solve this equation: n(7+n)
Click here to see answer by fractalier(6550)

Question 1010953: a local gym charges nonmembers 15 per hour to play basketball
members pay a yearly fee of 110 plus 4 per hour for playing basketball.
how many hours μst you play basketball to justify becoming a member
Click here to see answer by macston(5194)

Question 1010945: If initial velocity is 64 ft/s what is the maximum height...?
A soccer ball is kicked off the ground at 64 ft/s... What is the max height?
Use projectile function h(t)=-16t^2+Vt+H
H=initial height
V=initial velocity
t=time
h=height

Click here to see answer by stanbon(75887)

Question 1010978: integrate
Thanks!
Click here to see answer by Fombitz(32388)

Question 1010990: I need help solving this with the pythagorean theorem.
a ladder is leaning against a building so that the distance from the ground to the top of the ladder is 9 feet less than the length of the ladder. Find the length of the ladder if the distance from the bottom of the ladder to the building is 15 feet
Click here to see answer by fractalier(6550)

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, 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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, 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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, 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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