Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 1115700: [(x+1)/(4x-12x+9) + 5/(3-2x)] � [(2x+3)/(4x^2-9)]
Click here to see answer by MathLover1(20849)

Question 1115718: 177,370.83=171,580(1+n*.75) need to find the rate % for this I=PRT
Thanks

Click here to see answer by Theo(13342)

Question 1115756: [1/(a-b) - 1/(a+b)] / [1/(a+b) + 1/(a+b)]
Click here to see answer by josgarithmetic(39616)

Question 1115756: [1/(a-b) - 1/(a+b)] / [1/(a+b) + 1/(a+b)]
Click here to see answer by ikleyn(52776)

Question 1115681: Make A the subject of the formula Sn=Ar(r^n-1)/r-1

Click here to see answer by ankor@dixie-net.com(22740)

Question 1115691: (1/a-b - 1/a+b) / (1/a+b + 1/a+b)
Click here to see answer by josgarithmetic(39616)

Question 1115825: Please help me answer this question 18-6w
Click here to see answer by Alan3354(69443)

Question 1115824: Please help me answer this question 21+3y.
Click here to see answer by Alan3354(69443)

Question 1115823: please help me answer this question 9v-18

Click here to see answer by Alan3354(69443)

Question 1115846: How would you solve the equation:
-8(x+3)=12(x+5)
Click here to see answer by josgarithmetic(39616)

Question 1115858: Hutch tossed an apple to Catherine, who was on a balcony 40 feet above him, with an initial speed of 56 feet/second. Cath missed the apple on its way up, but caught it on its way down.
How do you find the axis of symmetry?
Click here to see answer by ikleyn(52776)

Question 1115861: The smallest angle in a triangle is 1/9 as large as the largest angle. The third angle is twice the smallest angle. Find the three angles.

Click here to see answer by ikleyn(52776)

Question 1115992: For the function F(x)=x^2+30x+210
a.) Calculate the change in F(x) from x=10 and x=15.
Click here to see answer by Boreal(15235)

Question 1116006: If x^2 + y^2 + 4x - 2y + 1 = 0, show that (x+2)^2 + (y-1)^2 = 4
Click here to see answer by greenestamps(13198)

Question 1116012: Make n the subject.
2n=(1/n) - 4

Click here to see answer by josgarithmetic(39616)

Question 1116036: Charlie Brown punts a football, which leaves his foot at a height of 3 ft above the ground and with an initial upward velocity of 70 ft/sec. The vertical velocity of the football t seconds after it is punted is given by v(t)=-32t+70, where v is in feet per second.(Note that velocity is the derivative of height.)
After how many seconds does the ball reach its highest point, and how high is the ball at this point?
Click here to see answer by ikleyn(52776)

Question 1116037: Charlie Brown punts a football, which leaves his foot at a height of 3 ft above the ground and with an initial upward velocity of 70 ft/sec. The vertical velocity of the football t seconds after it is punted is given by v(t)=-32t+70, where v is in feet per second.(Note that velocity is the derivative of height.)
Snoopy catches the football 5 ft above the ground. What is the vertical velocity of the ball immediately before it is caught? Round final answer to four decimal places, but do not round in intermediate steps.
Click here to see answer by ikleyn(52776)

Question 1116018: A steamer goes downstream from one port to another in 9 hours.It covers d same distance upstream in 10 hours.If the speed of d stream br 1 km/h, find d speed of d steamer in still water and d distance between d ports
Click here to see answer by ikleyn(52776)

Question 1115972: If a/b = c/d = k
Find the value of (3a^2-ac+c^2)/(3b^2-bd+d2) in terms of k. a/b=k;i.e a=bk, c/d=k, i.e c=dk.

Click here to see answer by ankor@dixie-net.com(22740)

Question 1116046: Write the slope intercept form of the equation of the line that passes through points (-1/2,-1) and (1/2,-2). Identify its intercepts
Click here to see answer by Alan3354(69443)

Question 1116055: Two thirds of thirtyfive
Click here to see answer by josgarithmetic(39616)

Question 1116081: Hey sorry but if you could help me find an equation that fits this description and solve it that would be great,
A triangle has a perimeter of 255cm. If the longside is three times the short side how long is the middle side
Click here to see answer by ikleyn(52776)

Question 1116106: I'm trying to brush up on my math skills 45 years after high school. Most of it is pretty basic but this one has me stumped.
( b + a ) / ab = 1 / f
solve for b
I've mashed it all around but I just can't tease out the b. I even tried working backward from the answer. How is this done? The answer in the back of the book is:
b = fa / ( a - f ) or b = -fa / ( f - a )
if you're interested.
Thank you,
Jim
Click here to see answer by ankor@dixie-net.com(22740)

Question 1116200: solve the following equation and check your answer in the original equation. Please show all work including the check:
(8x +9)-5 (3+x)=4x
Click here to see answer by Alan3354(69443)

Question 1116196: a) solve the equation 7e^x + 3 = 2e^2x
b) solve 1/2 |2-2x|<_4 and represent on the number line
c) sole the equation x^4-5x^3+5x^2-5x-6=0

Click here to see answer by Alan3354(69443)

Question 1116266: (3x-1)/5 - 2(y+3)/3 = -8/3
(4x-y)/3 - (y-2)/2 = 19/12
Click here to see answer by josgarithmetic(39616)

Question 1116303: Find equivalent expressions that have the least common denominator.
4/(7v^5y) = _
11/(343vy^6) = _
Click here to see answer by josgarithmetic(39616)

Question 1116335: factorise completely the following
a) x^9-y^9
B)x^4-5x^3+5x^2+5x-6
Click here to see answer by KMST(5328)

Question 1116335: factorise completely the following
a) x^9-y^9
B)x^4-5x^3+5x^2+5x-6
Click here to see answer by MathTherapy(10551)

Question 1116337: the fourth term of a GP is 1/2 and the sixth term is 1/8. its common ratio is negative
a) how many term of GP add up to give a sum of -2/22/32?
b)what is the sum to infinity for this GP
Click here to see answer by KMST(5328)

Question 1116343: If √(a^2+ b^2) = 613 then find the value of a+b.
Click here to see answer by ikleyn(52776)

Question 1116336: find a and b given that when x^3+2x^2+ax+6 is divided by x-1 the remainder is 4 and when divided by (x+2) the remainder is 16
Click here to see answer by ikleyn(52776)

Question 1116391: The sum of a number and its reciprocal is 29/10. What are the numbers?
Click here to see answer by josgarithmetic(39616)

Question 1116399: Given a+b=1, a^3 + b^3=16 and (a+b)^3 = a^3 +3a^2b +3ab^2 + b^3, find the value of a^2 + b^2.
Click here to see answer by Alan3354(69443)

Question 1116399: Given a+b=1, a^3 + b^3=16 and (a+b)^3 = a^3 +3a^2b +3ab^2 + b^3, find the value of a^2 + b^2.
Click here to see answer by ikleyn(52776)

Question 1116453: ben and jerry's sells 4 times more ice cream cones ($3) than shakes ($8).If last month's sales toaaled $4,800, how many of each were sold? check your anwers
Click here to see answer by ikleyn(52776)

Question 1116452: stapes sells boxex of pens ($10) and rubber bands($4).Leona ordered a total of 24 cartons for $210. how many boxes each did leona order? check your answer hint: let p = pens.
Click here to see answer by stanbon(75887)

Question 1116474: Given a + b= 1, a^3 +b^3 = 16 and (a+b)^3 = a^3 + 3a^2b + 3ab^2 + b^3, find the value of a^2 + b^2
Click here to see answer by Alan3354(69443)

Question 1116541: how do you solve this?Find x
2x+4=8

Click here to see answer by Alan3354(69443)

Question 1116541: how do you solve this?Find x
2x+4=8

Click here to see answer by Jessica789(1)

Question 1116475: Solve (2x-1)^4 + (2x-1)^2 - 6 = 0
Click here to see answer by math_helper(2461)

Question 1116597: a^2-b^2-4ac+4c^2
Click here to see answer by Alan3354(69443)

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

Click here to see answer by josgarithmetic(39616)

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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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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