Questions on Algebra: Equations answered by real tutors!

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Question 65481: Subtract and express result in simplest form
5a - 12 - 3a - 2
------- -------
a^2-8a+15 - a^2-8a+15
The top part of the fraction I believe would end up looking like this:
5a - 12 = -7a
3a - 2 = 1a
The bottom part of the fraction would result in
a^2-8a+15 = 23a^3
Leaving the equation ending with the result of:
-7a - 1a
-------------
23a^3 23a^3
Simplest form would be:
-6a
----
23a^3
Is this correct for this problem? Thank you
Click here to see answer by stanbon(57953)

Question 65476: Divide the fraction:
6p-18 / 3p-9
---------------
9p / p^2+2p
The first step is to invert the second fraction I believe:
6p-18 / p^2+2p
----------------
9p 3p-9
The next step is to cancel out I think:
3 goes in to 6, 9, and 18
The last fraction has no cancel outs leaving the equation looking like this:
2p-6 / p^2+2p
---------------
3p / 3p-9
From here I become preety lost. Is there any hope for me in figuring this problem out? I would be happy with a good break down for future reference as well so I could really figure them out. Thank you in advance for the great help!
Click here to see answer by stanbon(57953)

Question 65480: Subtract and express result in simplest form
x^2 - 9
--- ---
x-3 - x-3
If I was to continue on with this I would first cancel out the x-3 since they are both equal to each other
Then to do the top I believe I would just say it is -9x^2 the answer being
9x^2, is this correct? Thank you
Click here to see answer by checkley71(8403)

Question 65475: Multiply the fraction and put in simplest form:
2x^2-x-3 * 3x^2-11x-20
------------------------
3x^2+7x+4 * 4x^2-9
It then says to factor but when it says to factor I become lost and confused on the whole ordeal. Is there a way someone cuold help me out with the answer and a good break down of how to work a problem like this for the future? Thank you in advance for the great help :-)
Click here to see answer by stanbon(57953)

Question 65526: (x-52)/x=.58
Click here to see answer by stanbon(57953)

Question 64961: PLEASE HELP:
Write 3-{-36 in standard form (they dont have the symbol for what i needed which was in the shape of a divisional sign so i used {
Click here to see answer by stanbon(57953)

Question 65534: Find x :
m/c - 3a + c/x = f
Click here to see answer by stanbon(57953)

Question 65547: Solve each of the following systems by graphing.
(10) 2x – y = 4
2x –y = 6
Solve each of the following systems by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent.
(12) 2x +3y = 1
5x + 3y = 16

Click here to see answer by tanimachatterjee(60)

Question 65548: Solve each of the following systems by substitution.
(16) 5x –2y = -5
y –5x = 3
(20) 8x –4y = 16
y = 2x –4
Solve each of the following systems by using either addition or substitution. If a unique solution does not exist, state whether the system is dependent or inconsistent.
(38) 10x +2y = 7
y = -5x + 3

Click here to see answer by chitra(359)

Question 65428: Find x :
m/c - 3a + c/x = f
thank you
Click here to see answer by funmath(2925)

Question 65421: solve:
a^N=a^1 + (n-1)d for d
Click here to see answer by funmath(2925)

Question 65426: 149x + [sqare root of]13
Click here to see answer by checkley71(8403)

Question 65355: Solve for x:
a)y-x=6
b)1/x+7>-3
Click here to see answer by funmath(2925)

Question 65569: 4y + 2y
---------- ----------
y^2 + 6y + 5 y^2 - 1
I am just so lost on how to understand these types of problems! I become frustrated because I always end up with the wrong answer. Is there any hope in understanding this type of problem? Thank you for the great help :-)
Click here to see answer by checkley71(8403)

Question 65583: Write this ratio in simplest form:
1/10 / 1/4
First I must flip the second problem:
1/10 / 4/1
Now I can get rid of the 10 and 4 by dividing it by 2 Leaving it with:
1/5 / 2/1
Now I can cross out the ones:
5 / 2
Giving me an answer of:
2
Although I do not believe this is right because I can not have a remander right?

Click here to see answer by ptaylor(2052)

Question 65582: Simplify the fraction:
w+3
---
4w
-------
w-3
---
2w
This equation does not make sense to me, it is two fractions in one fraction. How do I figure this out? Thank you
Click here to see answer by checkley71(8403)

Question 65584: The combined resistance of two resistors r1 and r2 in a parallel circuit is given by the formula:
Rt = 1
-------
1 1
--- + ---
R1 R2
Thank you for the help
Click here to see answer by Nate(3500)

Question 65573: Solve and check the equation for X
x/6 - x/8 = 1
This equation to me does nto equal 1:
x - x = 0
6 - 8 = -2
The equation should be -2 correct?
Click here to see answer by 303795(595)

Question 65576: Solve the equation for X
2/5 = x-2/20
To get this equation forst I must figure out what x is:
5-2=3
10-2=8
12-2=10
2/5 = x-2/20
2/5 = 10-2/20
Simplest form=
10/5=2
20/5=2
Leaving the eqation with
x=12
Is this right:
Click here to see answer by checkley71(8403)

Question 65575: Solve and check the equation for X
2 = 3 + 9
----- ------- -----------
x+2 x+6 x^2+8x+12
I am confused on this probelm. They added way to many things in there for me to understand. Thank you for the help
Click here to see answer by checkley71(8403)

Question 65574: Solve and check the equation for X
x - x+1 = 8
--- ----- -----
x-2 x x^2-2x
I would first cross out the two x's
Leaving the equation looking like:
0 x+1 = 8
---- - ----- -----
x-2 0 x^2-2x
To go from here I believe I would add x+1= 1x
and subtract x-2 which equals -2x
The equation would look like this:
-2x - 1x = 8
-----
x^2-2x
From here I am lost but I think I became lost a while ago
Click here to see answer by checkley71(8403)

Question 64682: Please help to solve :
-x + 2 / 3 - 2x + 5 / 4 = 5
thank you
Click here to see answer by jayanthihemkos@yahoo.com(87)

Question 65591: Solve
(4x + 5 / 3) + 2 = x/7
Click here to see answer by funmath(2925)

Question 65593: Find x :
ay = b(c/x+e + 3f/h)
Click here to see answer by funmath(2925)

Question 65636: hello, please can you help me solve this. √2x+1=3 I got confused,

Click here to see answer by Earlsdon(6294)

Question 65656: please help me. I am a virtual school student and do not understand how to figure thease out even with the answers.
1)15m+3
------
2
=-6
2)3/2*-15=-12
3)-7x+3=-15/2
4)4x+1/2(12*t2)=3
5)3/2(x+8)=6x

Click here to see answer by funmath(2925)

Question 65703: Solve for X
25x^2 = 13
The X would be a negative number I beleive, is this correct?
Click here to see answer by funmath(2925)

Question 65732: a
Divided by
b + 1 / b + x/c
Click here to see answer by stanbon(57953)

Question 65705: Solve for X
x^2 + 4x + 4 = 7
(factor the left hand side)
4x + 4 = 8x
x^2 + 8x = 7
I have 2 X's and this confuses me since I can not factor them to come up with it to = 7, can someone please explain, thank you
Click here to see answer by checkley71(8403)

Question 65704: Solve for X:
2(x-5)^2=3
I know the first step I believe is to multiply the 2 towards the x and the 5:
2*x = 2x
2*5 = 10
(2x - 10)^2 = 3
The next step is to figure out what X is correct?
2(x) - 10^2 = 3
Gosh I am lost on this step, could someone please give me a hand, thank you
Click here to see answer by checkley71(8403)

Question 64680: Please help solve the equation and give the x-value solution
1/2x+3/5y=3/2
-1/4x-1/8y=1/8
Click here to see answer by chitra(359)

Question 65770: Solve the quadratic equation by completing the square:
2x^2 + 10x + 11 = 0
Can someone please explain to me the idea behind the quadratic equation, thank you
Click here to see answer by Earlsdon(6294)

Question 64595: Solve, using the five-step method.
1. Emma joined a DVD movie club. It cost $10 to join and $17.50 for each DVD ordered, including shipping charges. When her first order arrived, she received a bill for $115. How many DVDs did she order?

2. Laurie’s car gets 20 mi/gal. She plans to drive 440 mi on her vacation. How many gallons of gas will Laurie need for the trip?

Click here to see answer by faceoff57(82)

Question 65817: Solve for X:
x^2+4x+4=7
The answer I recieved was:
X=.645
My teacher has said this is wrong and is not in algebra format. Can someone please help me with the answer and the correct format? Thank you so much for the wonderful help this site brings me and many others.
Click here to see answer by checkley71(8403)

Question 65816: I have turned to you for help in solving this and received an answer, but my teacher has advised me that it is not in correct format. Can anyone please help me make this correct format. Thank you so much:-)
2(x-5)=3
Answer is: X1=3.77 and X2=6.22,
How do I make this look like an algebra equation for an answer?
Click here to see answer by stanbon(57953)

Question 65840: Use the discriminant to determine the kinds of numbers that will satisfy the equation 5x = x^2 - 3. Do not solve
Click here to see answer by 303795(595)

Question 65858: 1/r=1/s+1/t....solve for s
w=a^2/t.....solve for t
thanks
Click here to see answer by funmath(2925)

Question 65899: If a=0.65 and b=1.28 and c= -5/2,evaluate -a(-b)+c.I don't get what to do at all,my answer I get is -5.83 and that's wrong as I was told can you help me? And I have two more problems and that's it.The next one is solve the equation for x, 6x minus 18=4x+8 and I don't know where to begin.And the last one is solve the equation for n,-55 minus 4n=13,there is another problem that I don't know where to begin can you please help me, thank you very much.
Click here to see answer by stanbon(57953)

Question 65914: I have three fraction questions that I need help with because I'm not good with fractions at all the question are,solve the equation for b, 11over12+b=5over6 and I don't know where to start.The next one, solve the equation for f, f-(-7over10)=-4over5.And the last one is, if c=5over6 and d=1 over 4,evaluate 8c over-d and that is the last question thank you for any help I can get.
Click here to see answer by stanbon(57953)

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