Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 204676: what is the sum of the solution
x squared - 12=4
Click here to see answer by Earlsdon(6294)

Question 204761: Solve the equation
4(4+x)^2=9

Click here to see answer by stanbon(57984)

Question 204768: Could you please help me factor this trinomial?
7v^2-21v-280
Thanks!
Click here to see answer by jsmallt9(3296)

Question 204772: A piece of wire 30com long is cut into two pieces. One of these is bent into a circle and the other is bent into a square enclosing the circle. What is the diameter of the circle?
Click here to see answer by ankor@dixie-net.com(15747)

Question 204767: Could you please help me out with this problem??
Factor completely...
7w^3+w^6-30
Thanks for your help!
Click here to see answer by lazi(15)

Question 204816: Sophie sets off on awalk at 6km/h. Ten minutes later, her brother Dave sets off after her on his bicycle at 15km/h. How far must Dave go to catch up with Sophie?
Click here to see answer by edjones(7569)

Question 204852: Hello I need to add these two fractions together.
However, the variable is confusing me.
-1/6x + 1/4
Click here to see answer by stanbon(57984)

Question 204848: Factorise these completely.
x(x+1)(x+3)(x+5)-x(x+3)(x+5)

Click here to see answer by stanbon(57984)

Question 204902: Hi all, Im still having trouble with these vector problems, I cant solve the problems listed below for the following:
Let ~u = 3~i - ~j - 2~k and ~v = 2~i + ~j + ~k.(Again, the ~ symbols mean that there is and arrow symbol above the value in the positive direction)
I need to:
a) Calculate the cosine of the angle between ~u and ~v.
b) Fin the cross product of ~u and ~v.
Some help with steps and explanations on how to solve would be great.
Thanks, -Nick
Click here to see answer by alicealc(281)

Question 204912: Please can someone help me solve this problem:
Write the standard equation of the circle passing through (2,5) with the center at (-2,-3).
Click here to see answer by nerdybill(7011)

Question 204911: Please help me find the solution to this problem:
Find the equation of a straight line through (-3,2) that is perpendicular to X+3y=6 with the equation in standard form.
Click here to see answer by stanbon(57984)

Question 204931: (x/3+5) is five times (x/5-4). Find the value of x.
Click here to see answer by ankor@dixie-net.com(15747)

Question 204935: (1-2x/5)is 3 less than three times (x/2-5). Find the value of x.
Click here to see answer by Earlsdon(6294)

Question 204997: factor completely: 3x^2(4x^2+1)^8 + 64x^4(4x^2+1)^7
I worked it out and I got: 268x^18 + 64x^ + 3x^2
but it doesn't sound right!!!
Click here to see answer by stanbon(57984)

Question 205021: I need an equations for this problem. I have tried but can not do it.
Gwen sold her car on consignment for x dollars. The
saleswoman’s commission was 10% of the selling price
and Gwen received $6570.
Thanks,
Click here to see answer by Earlsdon(6294)

Question 205014: solve for x and y in the equations:
x + y =5;

Click here to see answer by ankor@dixie-net.com(15747)

Question 205053: please help me solve this equation, I've tried and cannot get the correct answer thanks for your help in advance.
2t-1/3t+1+3t-1/6t+6=t/t+1
Click here to see answer by stanbon(57984)

Question 205051: IT IS ASKING TO SOLVE IN ELIMINATION METHOD.
5x+6Y=2
10x+12y=4
What is the solution of the system
type an ordered pair, type an integer or a fraction N if there is no solution i if there are infinate solutions
Click here to see answer by scott8148(6628)

Question 205061: x
- + -6 =5
5
Click here to see answer by Alan3354(31538)

Question 205087: 18x - 12y = 18 x = y - 12 what is x? What is y?
Click here to see answer by checkley77(12569)

Question 205166: -2 + 1/6t =-7/8
Click here to see answer by stanbon(57984)

Question 205204: Need help with this equation please. I am supposed to simplify this equation and rewrite with positive exponents.
(-27x^9 )^(1/3)
Thanks
Click here to see answer by edjones(7569)

Question 205206: I need help with this equation please: Supposed to solve the equation and check for extraneous solutions.
3√(w+1)=6
Thanks
Click here to see answer by edjones(7569)

Question 205214: please solve giving stepwise solution:
e^(e^(lnx))
Click here to see answer by stanbon(57984)

Question 205205: I need help with this equation please--Supposed to solve the equation and check for extraneous solutions.
√(a-1)-5=1
Click here to see answer by profemmanuel2q@yahoo.com(15)

Question 205259: solve for x:
4 = x/5,000,000
Click here to see answer by checkley77(12569)

Question 205263: Divide (2x^3-8x^2-4x-6)/(x-3) using synthetic division
Click here to see answer by Edwin McCravy(8999)

Question 205177: how do you solve 5/6x - 8/2x = x/4
Click here to see answer by edjones(7569)

Question 205292: solve the system of equations
3x+4y+z=7
2y+z=3
-5+3y+8z=-31

i need you help, im desperate.
Click here to see answer by alicealc(281)

Question 205255: Find all solutions (x,y):
2x-y=2
y^2-4x=4
Click here to see answer by alicealc(281)

Question 205233: Please help me factor the following:
3x^3+192
2x^3-11x^2+12x+9
9x^2-3x-2
and
2x^5/4+x^3/4-15x^1/4
p.s. the 5/4, 3/4 and 1/4 in the above equation are exponents (2x raised to the 5/4)
Thank you
Click here to see answer by stanbon(57984)

Question 205344: a(a+b)^2+b(a+b)^2
Click here to see answer by stanbon(57984)

Question 205392: Simplify it
5x^3-10x^2/10x-5x^2
Click here to see answer by user_dude2008(1861)

Question 205331: Hi all, I was hoping to get help with the following problems. I need to find ∆y / ∆x, given the following information:
a) y = 1/x, x = 3, ∆x = 0.01;
b) y = sqrt(x), x = 9, ∆x = 0.9
Any help would be great,
Thanks, -nick.
Click here to see answer by Alan3354(31538)

Question 205419: The women in a club outnumber the men by 16. 7 times the number of women exceeds 9 times the number of men by 32. Find the number of men.
Click here to see answer by ankor@dixie-net.com(15747)

Question 205480: Ethan goes on a charity journey. He walks one-tenth of the way at 6km/h, runs one-sixth at 12 km/h, cycles one-fifth at 24km/h, completes the remaining 32km by car at 48km/h. How many kilometres does he travel and how long does it take?
Click here to see answer by Edwin McCravy(8999)

Question 205501: 4 is 25% of x. Solve for x.
I would appreciate any help i can get on this! Thanks in advance!
Click here to see answer by rapaljer(4667)

Question 205503: 2 1/3 x 5 1/4
Click here to see answer by user_dude2008(1861)

Question 205510: The ratio of 2 to 5 is what %?
Click here to see answer by stanbon(57984)

Question 205527: okay i had a math problem in class today and this isn't from a textbook
here it is
Input----Output
1------ 4
2------ 8
3------ 24
4------ X
Solve X, and the answer is not 4, 96, or 32. Please Help me ASAP!!!!!
Click here to see answer by Targetweek(62)

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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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