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

Tutors Answer Your Questions about expressions (FREE)

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

Question 25677: 5x+y/1.3y+6=
x=.24 y=.5
please solve
Click here to see answer by Eric Johnston(7)

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)

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(6287)

Question 25961: Expand -(a+b)
Click here to see answer by mathrebel(25)

Question 26282: how do I solve this problem (5ab²-4ab+7a²b)(ab)^-1
Click here to see answer by stanbon(57387)

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(57387)

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(57387)

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)

Question 27378: It says simplify -(-(-2))
Click here to see answer by Z(8)

Question 28040: how would a question like x^2-4x-21=0 be solved?
Click here to see answer by stanbon(57387)

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)

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

Question 21510: the product of c and 10
Click here to see answer by Hustla(1)

Question 29184: simplify 7(2 cubed)*[-(8)squared]*2.
Click here to see answer by Nate(3500)

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

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.
Click here to see answer by longjonsilver(2297)

Question 29408: 7+x=19 x=_
Click here to see answer by stanbon(57387)

Question 29410: 3/8=x/32
Click here to see answer by stanbon(57387)

Question 29558: (-3x-25)+(4)
Click here to see answer by ikdeep(226)

Question 29561: (2+3)+5=
7(3x-1)-5=
Click here to see answer by sdmmadam@yahoo.com(530)

Question 29650: A variable is a number that represents a letter. true or false
Click here to see answer by askmemath(368)

Question 29653: In the expression x+4x and 4 are both variables. true or false
Click here to see answer by askmemath(368)

Question 29654: The expression xyz means x times z. true or false
Click here to see answer by Earlsdon(6287)

Question 29652: A variable expression cotains operations, numbers, variables. true or false
Click here to see answer by ikdeep(226)

Question 29655: The volume of a box is length times width times height. need to write expression for words
Click here to see answer by sdmmadam@yahoo.com(530)

Question 29656: Nine boys each have x dollars. need to write expression for word
Click here to see answer by sdmmadam@yahoo.com(530)

Question 29722: Can anyone solve this problem
??????
1/4 x 8/9 x -3/5 = ?

Click here to see answer by Cintchr(481)

Question 29409: 4-1/3x=10 x=_
Click here to see answer by DanielleEstaAqui(4)

Question 29409: 4-1/3x=10 x=_
Click here to see answer by longjonsilver(2297)

Question 28736: I have looked everywhere in trying to solve these problems! How would you solve these problems step by step?¿
12-n/5 = 21-n-29
AND
21 = 1 -(4a+2)
Click here to see answer by checkley71(8403)

Question 29347: A^3,FOR A=5 ?
-2Z^2,FOR Z=3 ?
X2, FOR X=8 ?
Click here to see answer by sdmmadam@yahoo.com(530)

Question 30578: 3h+2 for h =10 2x for x = 15 4p - 3 for p = 20 3x +17 for x = 13

Click here to see answer by ikdeep(226)

Question 30577: 3h+2 for h =10 2x for x = 15 4p - 3 for p = 20 c for c = 56
7
Click here to see answer by AlgebraGirl08(3)

Question 25438: Add: [(j + 7) / b] + [(j - 9) / b]

Click here to see answer by brianunlv(12)

Question 31757: I am an old student in College Algebra and I have tried and tried to solve these Compositions of Functions.
Your help with the following problems would be greatly appreciated:
Find g(f(x))if g(x)=sqrt(2x+3) and f(x)=4x-3.
Find h(f(x)) if h(x)=1/x+2 and f(x)=4x-3
Any thing you can provide would be a great assistance to an old woman.
Click here to see answer by venugopalramana(3286)

Question 31765: I tried to solve this:
Find h(f(x)) if h(x)=1/(x+2) and f(x)=4x-3
Please confirm my answer is correct:
h(f(x))=h(y)
f(x)=y
1/x+2 = 1/y+2
1/sqrt(2x+3)+2
Thanks in advance for your help.

Click here to see answer by stanbon(57387)

Question 31892: I'm not quite sure how to figure this one out. I tried:
6 = 24 ÷ g
6x24 = 24 ÷ g x 24
144 = g
Click here to see answer by mbarugel(146)

Question 28034: i need help understanding how to add addition problems with fractions.How do you add a whole number with a fraction?

Click here to see answer by stanbon(57387)

Question 32237: Evaluate: 3x^3 - 2x^2 + x -2 when x= -4 , x= -2. x = 0
Click here to see answer by checkley71(8403)

Question 32565: I hope this is the title this problem should be under. I have a question on a word problem below
1. A boat takes 3hrs to go 24 miles upstream. It can go 36 miles downstream in the same time. Find the speed of the boat (still water) and the speed of the current. bonus: how far downstream does a styrofoam cup float in 3 hours?
- I know I need to set it up with x= something and y= something but I can't figure out what goes where.
Click here to see answer by stanbon(57387)

Question 32851: oneday 45 frogs were captured from a pond, marked and then returned to the pond.
The next day, 40 frogs were observed in the pond,of which 10 had been marked the previous day. Assuming the marked frogs are equally distributed among all the frogs in the pond, what is the best estimate of how many frogs live in the pond?
Click here to see answer by khwang(438)

Question 33209: A three digit number multiplied by a three digit number is equal to the product of 67,392. What are the two sets of three digits that can give you 67,392 when multiplied? Or what equstion can be usd to solve problem? My son has this problem for homework and is unable to derive the answer. Can you help us?
Thanks so much for your assistance.
Dee
Click here to see answer by venugopalramana(3286)

Question 33206:
(c-2b)2squared + d
when a=1,b=-2, c=3, and d=-4
Click here to see answer by priya(51)

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