Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 20898: combine and simplify
a^2/x-1 - a^2/x+1
Thank you
Click here to see answer by philberg99(10)

Question 23337: insert parentheses to make equation 9+6x2 divided by 3-1=12 true
Click here to see answer by philberg99(10)

Question 22051: Explain and show the steps in how to add,subtract and multiply the following:
(-9p^3 � q^2)(-3p^2 � q^4)
Click here to see answer by philberg99(10)

Question 20937: Please help with this equation:
4/3(WPB)=XY, solve for X
I multiplied both sides by 3 to get 4WPB=3XY and then divided both sides by 3Y to get 4WPB/3Y = X.
Does this sound right? Thank You!
Click here to see answer by venugopalramana(3286)

Question 23350: x=1+the square root of x squared + x + 2x times the square root of x - the square root of x + 1 + 2 times the square root of x
Click here to see answer by AnlytcPhil(1806)

Question 23357: how many ways could you choose 3 winning groups from 10 if their order does not matter?
AND
suppose there is a first, second, and a third place, so the order in which you choose the winning groups matters. how many ways can you choose 3 groups to win these prizes?
please help me with the equations. thanks.
Click here to see answer by stanbon(75887)

Question 22044: Explain how you use the exponent rules and the meaning of negative exponents to simplify the following expressions:
(b^2 � c^-3)/(b^-3 � c^2)

Click here to see answer by elima(1433)

Question 22041: Explain how you use the 5 rules of exponents to simplify the following expressions. Do not leave any negative exponents in your answer.:
^
(108r^2 � y)/(9r^3 � y^2)

Click here to see answer by elima(1433)

Question 23434: Hi PLEASE HELP ME!! I really do NOT know what i'm doing!! I need HELP! Help would be greatly appreciated! here is the problem and directions: Use the formula h=rt-4.9t^2 where h is in meters and the formula h=rt-16t^2 where h is in feet. The Problem: A ball is thrown upward with an intial speed of 24.5 m/s. when is it 19.6 m high? (Two answers)
Please help me, i'm desperate, i just cannot figure out this assignment, i'm having a lot of trouble! Thanks!
Click here to see answer by stanbon(75887)

Question 22003: 3(2*)-3*+4=2*+5 x=
Click here to see answer by rapaljer(4671)

Question 22052: Explain and show the steps in how to add,subtract and multiply the following:
(x - 9)(x - 11)

Click here to see answer by elima(1433)

Question 23525: What is w if 67.1= 29.7- 0.2w
Click here to see answer by rapaljer(4671)

Question 21745: 3r+4=S;r how would you solve these equations
Click here to see answer by rapaljer(4671)

Question 23544: I am unable to help my daughter with this pronblem in math
on a multi-step equation for pre-algebra

5/8(p-4)=2
how do we figure out what p is
Click here to see answer by Earlsdon(6294)

Question 23637: 5x=9x-16
Click here to see answer by MathNerdette(3)

Question 23647: 8x-96=64
How do you solve for "x"?
Click here to see answer by elima(1433)

Question 23707: PLEASE help me solve this problem!
35=72-q
Click here to see answer by longjonsilver(2297)

Question 23708: PLEASE HELP ME SOLVE THIS!
36-d=17
thank you for your time
Click here to see answer by longjonsilver(2297)

Question 23709: principal _____________
interest rate 11%
time 5 years simple interest $467,867.40
please help me solve this
thank you so much
Click here to see answer by longjonsilver(2297)

Question 23709: principal _____________
interest rate 11%
time 5 years simple interest $467,867.40
please help me solve this
thank you so much
Click here to see answer by rapaljer(4671)

Question 23649: 4h+8+7h-2h=89
Click here to see answer by longjonsilver(2297)

Question 23711: Hello,
I've got a series of equations and only one of them can be usefull to find the solutions of the others.
The equation is 3 x + 2 y = 189
My problem is that I can't possibly find x nor y and thus I'm stuck with the other equations.
Can you tell me what I should look for in order to find the solutions?
Thank you
Click here to see answer by rapaljer(4671)

Question 23673: 2/5X +6=1/6X-5
Click here to see answer by rapaljer(4671)

Question 21689: i dont understand how to divide powers like 10 to the 9th power divided by 10 to the 7th power or like 2 to the 8th power divided by 2 to the 3rd power and monomial powers divided

Click here to see answer by stanbon(75887)

Question 23747: where is a online website where u can get online help for 9th grade algebra for free
Click here to see answer by Paul(988)

Question 23743: My algebra teacher is rapidly trying to teach us Direct Variation(ax+b=0), she says it's similar to (y=mx+b) but she's not telling me and my classmates how?
So could you help me understand how to work direct variation...
here's one of the problems we had in class...
2x-5=1
she tells us to graphicaally, then check it algebraically, but I don't even understand how to start.
Would you please help me?!

Click here to see answer by venugopalramana(3286)

Question 23756: sovle. check your solution. -7=9+2g
solve. check your solution. 5h+2-h=22
Click here to see answer by AnlytcPhil(1806)

Question 23773: How do I solve for b?
16b-squared - 9 = 0
Click here to see answer by AnlytcPhil(1806)

Question 23790: what is the answer to this fraction? can you simplify it?
a^2-2ab+b^2/a+b
is it (a-b)^2?
Thank you for helping me,
ivi
Click here to see answer by stanbon(75887)

Question 23800: A quarterly gas bill is given by the formulae c = S + nx
where C is the total cost of the bill in pence
S is the standing charge in pence
n is the number of units used
x pence is the cost per unit.
(a)calculate the value of C when S = 860, n = 152 and x =7
(b)Rewrite the formula so that it is written in the form n =...
Click here to see answer by stanbon(75887)

Question 23789: How to simplify this equation?
3a+b/6a+2b
i have asked others to give me the answer but this is what they got:
3a+b3a/2+b^2/2
im hoping that you can help me on this.
Thank you so much
Click here to see answer by stanbon(75887)

Question 23783: A paper mill produces 350 tones of paper from sawdust each week. if 50 tons more are used for newspaper than for wrapping paper, how many tons are used for each?
Click here to see answer by music974(43)

Question 23754: solve. check your solution. x/4=5

Click here to see answer by music974(43)

Question 23752: 5a=2a-9
Click here to see answer by music974(43)

Question 23792: how do you multily and show this question in simplist form?
(x^2-9/x+2)(x^2-4/x-3)
my answer was x^4-13x-x^2-8/x-6
is this right? if not, what is the answer?
Thank you.
Click here to see answer by Earlsdon(6294)

Question 23847: Please help me with this problem: (-5+x)/8 = 2x. Help would be greatly appreciated. Thanks
Click here to see answer by ilana(307)

Question 23846: Please help me!! Here is the problem: 3k=-9/5. Thanks
Click here to see answer by ilana(307)

Question 23755: simplify:-5u+6+4u-3
solve. check your solution.-4b=76
sovle. check your solution. 5m=0
solve. check your solution. 3s-4=8
Click here to see answer by elima(1433)

Question 23799: if a =1, b =2, c= -3 find the value of c-ab
c+ab

Click here to see answer by elima(1433)

Question 23890: How do I solve for a?
a^2-11a+28
Click here to see answer by Earlsdon(6294)

Question 23890: How do I solve for a?
a^2-11a+28
Click here to see answer by elima(1433)

Question 23886: 7k-4(3k+6)
Click here to see answer by AnlytcPhil(1806)

Question 23858: factor
9x^2+3x-2
Click here to see answer by PeterC(8)

Question 24025: i have to write an equation of the line with the given slope and y intercept...example: slope 5 y intercept -15, what am i supposed to do? do they want me to put it in the y=mx + b form or something else?
Click here to see answer by rapaljer(4671)

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