Questions on Algebra: Equations answered by real tutors!

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Question 376148: 6x+3y=-3
-5x+y=20
6x+3y=-3, -5x+y=20
add 5 to both ends of 2nd equation
-5x+5x+y=20+5x
y = 20+5x
substitute y in the first equation
6x+3(20+5x)=-3
6x+60+15x=-3
21x=-63
divide by 21
x= -63/21
x= -3
plug value of x into the second equation
-5(-3)+y=20
15+y=20
y=5
Solve by substitution method
Click here to see answer by needhelpfastplease(1)

Question 561819: x^3/4-x^1/4 factor and simplify
Click here to see answer by Edwin McCravy(20054)

Question 561849: Your task is to find two different numbers that sum
to 1000. One number must be a multiple
of 19 and the other number must be a multiple of 47.
Show or explain how you got your answer.

Click here to see answer by TutorDelphia(193)

Question 561991: How do you factor c^2-1c-12
Click here to see answer by scott8148(6628)

Question 562291: 3X+5=20
Click here to see answer by bluemockingjay7(41)

Question 562244: Im having a problem understanding how to slove a problem when the varible is next to 3 numbers: 5x+3=2x-(5-3x) i dont know what to do with the 5x or where to use the distributive property.

i have a problem with understanding where to use the distributive property and where i should cancell out numbers in this equation:2(3n+6)=3(12-2n)

thanks for the help:)
Click here to see answer by ankor@dixie-net.com(22740)

Question 562373: Determine the area between the x-axis, the vertical lines x = 0 and x = 1 and the following curve:
F(x) = 2x^3 + e^3x
Please, thank you
Click here to see answer by Alan3354(69443)

Question 562507: Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 60 miles per hour and train B is traveling at 80miles per hour. Train A passes a station @ 12:10am. If train B passes the same station @ 12:22am, at what time will train B catch up to train A?
I am not sure how to right the equation to solve, help?!! If you could please provide the equation and the answer so I can check my work?
thanks!
Click here to see answer by ankor@dixie-net.com(22740)

Question 562582: 1.)can you please help me solve the equation 3(6x + 5)= 9(2x + 3) -1 ?
2.)can you please help me solve the equation 4(2x + 5) + 6x + 21 ?

Click here to see answer by solver91311(24713)

Question 562624: The question of the problem is x over 5 equal 8. How do I solve that?

Click here to see answer by solver91311(24713)

Question 562289: Two sevenths of a number is eighteen fifty-sixths. Find the number
Click here to see answer by ankor@dixie-net.com(22740)

Question 562905: 3p-7+9-2p=p+2 solve for x
Click here to see answer by Maths68(1474)

Question 562953: 3x+2y=0
9x-24=2y
Click here to see answer by mananth(16946)

Question 563022: By a change of variables, determine the following integral:
integral ((5x^3 - 3x^2 + 1)^3/2)(5x^2 - 2x) dx
Help me please
Click here to see answer by htmentor(1343)

Question 563062: 2)How many centimeters are in 2 kilograms?

Click here to see answer by Alan3354(69443)

Question 563351: (-12y)-10=-6y+14 What does the variable y equal?
Click here to see answer by stanbon(75887)

Question 563360: h= 3y^2 + (Y) where y=4. I'm not sure how to figure this one out.
Click here to see answer by nicky429(3)

Question 563379: what is n/20=3
Click here to see answer by Alan3354(69443)

Question 563421: S=p+prt Solve for p
Click here to see answer by jim_thompson5910(35256)

Question 563624: Solve for t assuming a and b are positive constants.
Po=P not
P=Poa^t
Click here to see answer by stanbon(75887)

Question 563616: By a change of variables, determine the indefinite integral as follows:
integral (x^2 - 3x^4)^1/2dx?
Thank you
Click here to see answer by htmentor(1343)

Question 563709: I am working on this problem and I think I know some of the steps. I'll show you what I have done so far. 1/2x + 1 = 3/4
1/2x +1 -1= 3/4 - 4/4
1/2x = -1/4
where do I go from here?
Click here to see answer by Alan3354(69443)

Question 563713: what is r? 2(4-2r)=-2(r+5)
Click here to see answer by Tatiana_Stebko(1539)

Question 563806: 2x+7y=3
x=1-4y
Click here to see answer by mananth(16946)

Question 563804: y=3x-8
y=4-x
Click here to see answer by mananth(16946)

Question 563506: What is the answer to (showing the work) the quotient of x and 6 equals 8.7.

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

Question 563924: I am trying to understand how this:
http://www.webcruiser.org/math/sample.jpg
gets simplified to this:
http://www.webcruiser.org/math/sample_simplified.jpg
Sorry about the links -- copy and paste doesn't present the characters properly.
Click here to see answer by scott8148(6628)

Question 563975: Good Saturday Afternoon - can you help me solve this problem. I have several problems like this to finish for school and just do not understand :( Thank You - Jenni
5/4 - 5/9 = x/12
Click here to see answer by Alan3354(69443)

Question 564043: the perimiter of a tennis court is 210 feet and the length is 3 feet less then three times the width what are the dimentions?
Click here to see answer by TutorDelphia(193)

Question 563716: I have a word problem that I can't figure out. I do not know how to even begin to set up the equation. Here is the problem:
A large chess tournament is played in four different rooms at a community center. The number of players in the second room is twice the number of players in the first room. The number of players in the third room is three times the number of players in the second room. The number of players in the fourth room is four times the number of players in the third room. The tournament�s organizer claims there are �almost 200� players, and he�s correct. Exactly how many players are in the tournament?
I know that room 1 is x and room 2 is 2x, but after that I don't know what else to do. Can anyone help? Thanks in advance
Click here to see answer by scott8148(6628)

Question 564132: Hello, I need help with a problem, does anyone know how to solve this problem !
Use the discriminant to determine whether the following equations have solutions that are: two different rational solutions; two different irrational solutions; exactly one rational solution; or two different imaginary solutions.
x2 = -4x � 4
Click here to see answer by stanbon(75887)

Question 564129: Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.
14x + 18y = -54
-4x � 14y = 42
Click here to see answer by stanbon(75887)

Question 564136: how do i solve this problem
(a^9 b^12) / (ab)^10
Click here to see answer by stanbon(75887)

Question 564143: the perimeter of a rectangle is 84 inches, the lenght exceeds the width by 24 inches finf the lenght and width
Click here to see answer by mananth(16946)

Question 564145: Hi Tutors: Can you help me with this homework problem please. Thanks in advance.
Short Answer. The length of the side of a rectangular desk is given by 2x - 6y cm. The length of the front is given by 2x + 6y cm. What is an algebraic expression for the area of the top of the rectangular desk?
Click here to see answer by mananth(16946)

Question 564216: please help me with this problem
Click here to see answer by nerdybill(7384)

Question 564357: what is the real part of i to the 43rd?

Click here to see answer by Alan3354(69443)

Question 564397: A girl donates $1,000 to UNICEF. She is now giving $5 a week to UNICEF. After "x" weeks she will have donated "y" dollars. What is the equation relating "y" to "x"?
Click here to see answer by ad_alta(240)

Question 564438: Solve algebraically for x
2(x-4)≥ 1/2(5-3x)
Click here to see answer by stanbon(75887)

Question 564590: 6k-9=15
Please help me solve this two step equation .
Click here to see answer by ankor@dixie-net.com(22740)

Question 564662: A merchant has coffe worth $30 a pound that she wishes to mix with 40 pounds of coffee worth $90 a pound to get a mixture that can be sold for $70 a pound. How many pounds of the $30 coffee should be used?
Click here to see answer by mananth(16946)

Question 564679: Please solve for X and please show all work.
15,000 = (400,000 + X)/40

Click here to see answer by stanbon(75887)

Question 564726: a box with a square base and no top is to be made from a square piece of cardboard by cutting 4-in. squares from each corner and folding up the sides. the box is to hold 100 in.(cubed). how big a piece of cardboard is needed?
Click here to see answer by mananth(16946)

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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