Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 87024: x^-9 * x^9
Click here to see answer by checkley75(3666)

Question 87023: write in demcial notation....
42.3 x 10^4/3 x 10^7
Click here to see answer by stanbon(75887)

Question 87040: I am trying to help a student work a very simple world problem, but I do not know how to explain to her why she can't work as she wants to. Problem is: A smaller number plus 60, when divided by the smaller number, the quotient is 4.
I set up as X + 60/X = 4 I told her it is easiest to solve this problem by getting rid of the fraction and that we should multiply the X + 60/X by X and the denominator X will be cancelled out, and the 4 by X (must do both sides of equation) Then we would be left with X + 60 = 4X, then we would solve for X. She doesn't understand why we just can't cancel the two X's out of the X + 60/X in the beginning and then be left with 60 = 4. What is the reason? I can't seem to explain it to her. Thanks for help!!!! P.S. No book, it was sent home homework problem.
Click here to see answer by stanbon(75887)

Question 87022:
Click here to see answer by scianci(186)

Question 86929: solve and check
3x � 7 = 2x + 8
Click here to see answer by scianci(186)

Question 87047: Andrew and Kent do word processing. For a certain prospectus, Kent can prepare it 2 hrs faster than Andrew can. If they work together, they can do the entire prospectus in 5 hrs. How long will it take each of them working alone to prepare the prospectus? Round to the nearest tenth of an hour.
Click here to see answer by scianci(186)

Question 87070: Mary is 4 years older than John. Mr Smith is 5 times as old as John. If John is x years old how old is a Mary b Mr Smith? If the sum of the three ages is 60 years find how old John is.
Click here to see answer by stanbon(75887)

Question 86944: 5x-2y+3z=-9
4x+3y+5z=4
2x+4y-2z=14
Click here to see answer by Edwin McCravy(20055)

Question 87077: Solve for g.
s = -1/2gt^2 + vt
Click here to see answer by Flake(45)

Question 87128: Solve algebraically using one variable: The
perimeter (distance around) of a rectangle is 38
inches and its area (length times width) is 70
square inches. Find the length and the width of
this rectangle.
Click here to see answer by jim_thompson5910(35256)

Question 87132: one number is 12 more than the other. The larger number is 7 times the smaller number. Find the number.

thank you very much in advance!!!.
Click here to see answer by longjonsilver(2297)

Question 87141: For function y=1/x-2
Give the y values for x =-1,0,1,2,3,4.
Show work
Using these points, draw a curve. Show Graph
Click here to see answer by checkley75(3666)

Question 87141: For function y=1/x-2
Give the y values for x =-1,0,1,2,3,4.
Show work
Using these points, draw a curve. Show Graph
Click here to see answer by jim_thompson5910(35256)

Question 87281: Graph the function y=x and y=2 times the square root of x, on the same graph (by plotting points if necessary). Show the points of intersection fo these two graphs.
Graph:
Points of intersection:
Click here to see answer by rapaljer(4671)

Question 87280: Given the table:
x=-2,-1,0,1,2
y=.111,.333,1,3,9
Graph the function, identify the graph of the function (line, parabola, hyperbola or exponential), explain your choice, and give the domain and range as shouwn in the graph, and also the domain and range fo the entire function.
Graph:
Graph Type:
Explanation:
Domain:
Range:
Click here to see answer by rapaljer(4671)

Question 87361: If 3x=y and y=12. Then what is x?
Click here to see answer by jim_thompson5910(35256)

Question 87445: Complete the ordered pairs so that each is a solution for the given equation
3x + 4y = 12 (0, ), ( ,3/4 ), ( , 0), (8/3 , )
Click here to see answer by checkley75(3666)

Question 87490: Please help me !!
Solve. Identify all double roots.
a) 8y^2 +1 = 6y
b) x^4-25x^2 =0
c)(X-3)^3-(x-3)^2= 0
PLEASE HELP!!!!!
Click here to see answer by rapaljer(4671)

Question 87489: Please help me !!
Solve. Identify all double roots.
a) 8y^2 +1 = 6y
b) x^4-25x^2 =0
c)(X-3)^3-(x-3)^2= 0
PLEASE HELP!!!!!
Click here to see answer by rapaljer(4671)

Question 87530: Tutor,
This question is from a text book.
The exercise state solve literal equatio for the indicated variable
Question reads:
Depreciation solve for s
D=C-s/n
I have no clue how to begin to solve this question, any help will be greatly appreciated. Thank you.
Click here to see answer by rapaljer(4671)

Question 87546: 1/5k+5=1/6k-10
Click here to see answer by stanbon(75887)

Question 87563: Tutor Please Help...This question is from a textbook and I keep getting different answers.
Solve for x and check your result:
6x-1 over 5 minus 2x over 3 = 3 6x-1/5 - 2x/3 = 3
Sorry I am not sure how to do the fractions I will try and type it below
6x-1 - 2x
----------------- = 3
5 3
I have come up with 1.5, 2.1, & 6 I am thinking 6 may be close but I can not get any numbers so far to come out properly when I check.
Any insight into this problem would be greatly appreciated. Thank you.
Click here to see answer by Earlsdon(6294)

Question 87683: how can i get answers to this lesson? http://trinityunionhsd.owotw.com/showAssignment?course_id=mat0906&unit_id=2&assignment_id=l11
Literal equations
Click here to see answer by Edwin McCravy(20055)

Question 87613: How long will it take B dollars to triple itself at 13% simple interest?

Click here to see answer by stanbon(75887)

Question 87755: Hi,
I have some sheets on relativity and i was following the maths used in creating the Lorentz factor.
It's a factoring question i have, i can factorise equations but this one i don't understand how they did it and would appreciate it if you could explain it to me please.
The equation starts as:
t'^2=(v^2*t'^2+I^2)/c^2
They factorise the equation to be:
t'^2(1-[v^2/c^2])=I^2/c^2
How exactly did they get from that top equation to the second one?
Many thanks!
Steve
Click here to see answer by stanbon(75887)

Question 87751: how to solve this problem. y/5=25
Click here to see answer by checkley75(3666)

Question 87820: The diameiter of a bushing is 1.47 in.The bushing has a tolerance of 0.006 in. Find the lower and upper limits of the diameter of the bushing
Click here to see answer by checkley75(3666)

Question 87884: y2-3x+2=3x2
Okay I need work in solving for y in terms of x line by line?????????
Then say if it is a function or not and explain why or why not
HELP/thanks
Click here to see answer by rapaljer(4671)

Question 87880: Hello out there,I need some help with some problems,the first one is,Evaluate:(a+b)^2.The next one is,Multiply:(a-2b)(a+2b).The next one is,Multiply:(g-6h)(g-6h).And the last one is,Multiply:x(x+1)(x-1).Thanks to whoever can help.
Click here to see answer by SandySharma(35)

Question 87818: how can I reslove this equation:
60-89(60-89x)/2
Click here to see answer by jayanthihemkos@yahoo.com(87)

Question 87954: Word Problem to solve - thank you
need 50 warheads and silos to complete project
Cost per warhead is 4 million dollars and silo cost is 6 million
What is the number of warheads and silos I can produce if the budget is 210 million
Need the following steps:
1. assign variables
2. write algebraic model
3. solve the model
4. answer
thanks
BB
Click here to see answer by tutorcecilia(2152)

Question 87962: Word problem - hard one - thanks for help
Okay
Making 3 different kinds of missiles for defense - each one takes a different combination of alloys - aluminum, plexiglas, and titanium
Missile 1 - needs 2 tons of alum, 2 tons of plex and 3 tons of titan
Missile 2 - 3 tons of alum, and 1 ton of titan
Missile 3 - 3 tons of plex and 1 ton alum
Need to produce 800 of type 1 650 of type 2 and 350 of type 3
How many tons of each alloy will we need???? HELP!?!?!?!?!?
Steps needed:
1. assign variables
2. write algebraic model
3. solve model
4. answer
thank you so much - lucyloo

Click here to see answer by stanbon(75887)

Question 87957: Word problem to solve; thanks
purchased a combination of 25 air condition and heating systems for $440,000.
One single AC system cost 22,000 and single heat system cost 11,000. How many of each did they buy
Steps
1. assign variables
2. write algebraic model
3. solve model
4... answer
Thanks
bb
Click here to see answer by stanbon(75887)

Question 87964: please put into slope intercept form:
X<= 2y +8
2y + 3x <= 4
2y <= 3x +4
Thanks
BB
Click here to see answer by tutorcecilia(2152)

Question 87956: Word problem:
20 gallons of fuel and 14 gallons of collant cost $12,000 - needed for first simulation test
15 gallons of fuel and 9 gallons of coolant cost $8,000 - needed for second simulation test
What is the cost per gallon of fuel and a collant tank for the project?
Steps
1. assign variables
2. write algebraic model
3. solve model
4. answer
thanks
bb
Click here to see answer by stanbon(75887)

Question 88129: Hi i need to find the solution on this problem:
the product of two number is 30 and their difference is 7. find the numbers.
Click here to see answer by stanbon(75887)

Question 88142: + (-10) + 1Use addition rules to find the sum:
6
Click here to see answer by malakumar_kos@yahoo.com(315)

Question 88126: I know the answer is 5 and 12 but I can't get it to show as an equation (I must show my work and explann it in front of class tommorrow morning Help.
Click here to see answer by rapaljer(4671)

Question 88144: simplify the expression:
2 + 3x + (-3) + 9
Click here to see answer by malakumar_kos@yahoo.com(315)

Question 88143: use the addition rules to find the sum:
-7 + (-4) + 2
Click here to see answer by malakumar_kos@yahoo.com(315)

Question 88159: The tens digit of a number exceeds the units digit by 2. The sum of the digits is 1/7 of the number. What is the number?
Click here to see answer by longjonsilver(2297)

Question 88162: Rewrite the equation 4x � 6y = �30 as a function of x
Click here to see answer by rapaljer(4671)

Question 88108: Word problem #1
Need to make at least 12 heat and at least 20 radar missiles per month.
Production limits number of missiles to no more than 72 per month
Will sell the heat missilies for 312,000 and radar for 512,000.
How many of each should be sold to max profits per month?? What is the max profit?
Need:
Constraints
Objective Function
solution
So hard to work out - HELP!! thanks
lucyloo
Click here to see answer by ankor@dixie-net.com(22740)

Question 88081: Please place the following equations into y=
1.y<= 1.2x +8
2. y> -2x +4
3. y> 2x + 4
4. x<=3
5. y>=-2x +4
6. y<=2x +4
7. x>= 3
Thank you so much
lucyloo
Click here to see answer by jim_thompson5910(35256)

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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, 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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, 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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