Questions on Algebra: Evaluation of expressions, parentheses answered by real tutors!

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Question 23794: how do i subtract or add this correctly?
(4/a-5)-(1/5-a)
My answer was 4/a+a-26/5
What is the correct answer?
Thank you so much

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Question 23884: 2(5r+3)=5 I cant figure out how this is solved
Click here to see answer by AnlytcPhil(1807) About Me 

Question 24032: Elliot is 58 years old.Write an expression for the number of years by which Elliot's age exceeds that of his daughter,who is y years old?
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Question 24031: Elliot is 58 years old.Write an expression for the number of years by which Elliot's age exceeds that of his daughter,who is y years old
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Question 24021: how do you simplify (2ab third power)second power.
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Question 17261: How do I find the leading coefficient of p(x)=(x+2)^17?
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Question 24347: 6p-2(5p+1)=2p+4
Click here to see answer by askmemath(368) About Me 

Question 24378: How do you solve:
(700 + y) / 7 = 106
thank you

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Question 24454: -5[4 -(-3)(2)]=?
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Question 24737: I am a grandmother trying to help my grandson with pre algebra, he's in Texas and called me with this problem. (problem) n x 365=. Please help its been a long, long time since I've had algebra. Please?
Click here to see answer by rapaljer(4671) About Me 

Question 24911: the question is
evaluate each expression for r=6
5r ____________ r _________
-
2
I don't understand how to do this the teacher assigned it and never explained it could you tell me how to figure it out?
Also the next question I have is
Which number could be the value of m to make the number sentence below correct?
7x2>3m
the answers to choose from are 4,5,6,7 i figured that this is wrong None make sense to me Thanks

Click here to see answer by pwac(253) About Me 

Question 25122: 16000(1+r)^2=25000
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Question 25275: Solve for x: 50/x=10?
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Question 25296: how do you work out -10 +6 x (-3) / 6 + 9 ??
Click here to see answer by AnlytcPhil(1807) About Me 

Question 25586: Please help me find the value of this expression 5x+z/2y, x+0, y=-2, z=-2 I got to
5(0)+-2/2(3)=-2/6 after that I am lost please help.

Click here to see answer by longjonsilver(2297) About Me 

Question 25722: -5(X-1)+1=2X-1
Click here to see answer by pwac(253) About Me 

Question 25677: 5x+y/1.3y+6=
x=.24 y=.5
please solve

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Question 25791: Please help me solve this problem to the simplest form:
6a^2-21a+15

Click here to see answer by atif.muhammad(135) About Me 

Question 25993: I am trying to help my son with his pre algebra.....but it has been a long time...can you show me how to solve the following:
1/3(p+21)=1/6(p-9)
thanks, Rick

Click here to see answer by Earlsdon(6294) About Me 

Question 25961: Expand -(a+b)
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Question 26282: how do I solve this problem (5ab²-4ab+7a²b)(ab)^-1
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Question 26142: Write an algebraic expression for this statement. Then evaluate expression for n= 12.
3 increased by n ___________;____________
n students placed in 4 equal groups ___________;____________
Thank you!
Parent in need of help!!

Click here to see answer by stanbon(75887) About Me 

Question 26377: I want to make sure I did this correctly:
Add 8a - 6 and 4a + 5
Now I can simplify this equation by doing the first equation like this:
8a - 6 = 2a
The second equation I did this:
4a + 5 = 9a
Now I can combine these to be:
2a + 9a = 11a
Is this the correct method?

Click here to see answer by stanbon(75887) About Me 

Question 26376: 6x + 4(3x - 2) = 6x + 2
First I used the distributive process which broke it down to this:
6x + 12x - 8 = 6x + 2
Then I simplified the 6x and 12x which did this:
18x - 8 = 6x + 2
Then I had to get the x's on one side and the numbers on another:
18x - 6x = 12x
6x - 6x = 0
So the formula looked like this:
12x - 8 = 2
From here I became stuck with this. I did not know the next step. Could you please give me a hand? Thank you so much!

Click here to see answer by longjonsilver(2297) About Me 

Question 27378: It says simplify -(-(-2))
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Question 28040: how would a question like x^2-4x-21=0 be solved?
Click here to see answer by stanbon(75887) About Me 

Question 28466: 4/3 ( 4x-2) - 2(3x+4)

3 x 4 ( 4x-2) - 2(3x+4)
---
3
4( 4x-2) - 2(3x+4)

16X - 8 - 6X - 8

10X - 16
Did I solve this correctly?

Click here to see answer by askmemath(368) About Me 

Question 28779: 2x-10=4x-(2x+10)
Click here to see answer by sdmmadam@yahoo.com(530) About Me 

Question 21510: the product of c and 10
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Question 29184: simplify 7(2 cubed)*[-(8)squared]*2.
Click here to see answer by Nate(3500) About Me 

Question 29183: Please simplify: 7(2)squared *[-(8)to the second power]*2.
Click here to see answer by atif.muhammad(135) About Me 

Question 29276: I am helping my son with pre alegebra, his book is ridiculous for examples: These are what I need help on.
1. Simplify: -(-{-[-(2)]}), 2. Simplify (4)(-3), 3. Simplify: (-3)(-3)(-3)(-3). Evaluatexy-y, if x=6 and y=-5, evaluate -ab-a, if a=-4 and b=-5.

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Question 29408: 7+x=19 x=_
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Question 29410: 3/8=x/32
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Question 29558: (-3x-25)+(4)
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Question 29561: (2+3)+5=
7(3x-1)-5=

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Question 29650: A variable is a number that represents a letter. true or false
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Question 29653: In the expression x+4x and 4 are both variables. true or false
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Question 29654: The expression xyz means x times z. true or false
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Question 29652: A variable expression cotains operations, numbers, variables. true or false
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Question 29655: The volume of a box is length times width times height. need to write expression for words
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Question 29656: Nine boys each have x dollars. need to write expression for word
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Question 29722: Can anyone solve this problem
??????
1/4 x 8/9 x -3/5 = ?

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