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

Tutors Answer Your Questions about expressions (FREE)

Question 368768: Evaluate the expression for mn where m=2/5 and n=1/2
Click here to see answer by rfer(16322)

Question 368782: ok this is a statement that i need help on

m: The statement is a(n) ???
Click here to see answer by robertb(5830)

Question 369199: i cant seem to figure out how to solve this problem on my study guide for my math test.
Find all numbers for which the rational expression is undefined: x+3/(x+2)(x+5)
Click here to see answer by lefty4ever26(59)

Question 369390: Micah wanted to buy a new iPod. He has $250 but must save 3% of it for his little brother's birthday present. What is the most expensive Ipod he can buy given the state tax on ipods is 7%?
Click here to see answer by mananth(16946)

Question 369715: Please help me solve this equation: 3/ [ (1/3)x - 2/5 ] = (2/3) / (x - 1)
Click here to see answer by rfer(16322)

Question 370110: x^2 - 4x / x^2 - 5x - 36
simplify the given rational expression completely.
Click here to see answer by jsmallt9(3758)

Question 370167: 2/3x^2+8x-3+1/3x^2-7x+2
Add and simplify
Click here to see answer by lefty4ever26(59)

Question 370167: 2/3x^2+8x-3+1/3x^2-7x+2
Add and simplify
Click here to see answer by Fombitz(32388)

Question 370171: If the expression
-6w-5/4w+3
is to make sense,the values that w can take must be restricted.State the restriction on w
Click here to see answer by Fombitz(32388)

Question 370169: Multiply. write the answer in lowest terms
12uy/7y*5y/8u
Click here to see answer by Fombitz(32388)

Question 370168: Multiply and Simplify
x^2+4x+3/x-1*4x-4/x^2+5x+6
Click here to see answer by Fombitz(32388)

Question 370188: 2u/5w/8uw/7w
Click here to see answer by Fombitz(32388)

Question 370186: Express as a single fraction in lowest terms
-4+4w-8u/7w+6w+3u/2w
Click here to see answer by unlockmath(1688)

Question 370179: u^2+3u-28/32-2u^2
Simplify
Click here to see answer by Fombitz(32388)

Question 370323: Let : U = {1, 2, 3, 4, 5, 6, 7, 8}
A = {1, 2, 4, 5, 8}
B = {2, 3, 4, 6}

A ∪ B′
this is all that I got. I donot understand.
B� = {1,5,7,8}numbers not in b

Click here to see answer by Fombitz(32388)

Question 370388: I am having problems with evaluating expression, especially in a fraction and even worse in check to determine if my answer is correct. Here is one I am having problems with:
4(2z-3)/7 = 3z-11
(this is 4(2z-3) over 7
Thank you and can you show me how to properly check my answer.

Click here to see answer by stanbon(75887)

Question 369973: I was wondering if you can help me with this following equation to make it true by inserting one or more parentheses, I tried so many that i just end up with fractions.The equation is -5 exponent2+7/2/-11+2 * -1 exponent2-2=1 i tried [(-5)exponent2 +7/2]/-11+2*[(-1)exponent2-3] didn't equal 1 I keep getting 1.7777 where else should i put more parentheses?
Click here to see answer by scott8148(6628)

Question 371109: Classify the number as prime, composite, or neither.
1

Click here to see answer by Fombitz(32388)

Question 371438: -2(3r+4)+9(2r-11)
Click here to see answer by Aust05(12)

Question 371838: a=3,b=-2,c=-1,d=0,e=2,x=-4,y=2,z=6
1.a^2(b-c)^2
2. a^e+by+cx
3.(xyz)^2-(abc)^2
I don't get what variable or constant to apply an exponent?
Click here to see answer by robertb(5830)

Question 371840: (-3-2)3=
Click here to see answer by nyc_function(2741)

Question 371901: Simplify. Please show all of your work.
-7y � (-4y + 8)

Click here to see answer by Fombitz(32388)

Question 371900: According to the order of operations, what should be done first when evaluating this expression? Please do not solve. Write one of these: add, divide, evaluate the exponent, multiply, simplify inside the parentheses, or subtract.
3 ∙ 2^4 � 5

Click here to see answer by lostdiver(4)

Question 371899: Evaluate. Please show all of your work.
x � 2 � x2 � (x), for x = -4

Click here to see answer by lostdiver(4)

Question 372090: Evaluate 5x for each value of x. x=0.3
Click here to see answer by ewatrrr(24785)

Question 372755: Why does the following not have a solution?
√(x+3) = -2
Click here to see answer by Fombitz(32388)

Question 372973: Please help I seem to be brain dead with this problem,
-3.4 -(-7.6)=
Thank you for any help!
Blaine
Click here to see answer by jim_thompson5910(35256)

Question 373046: evaluate |-14|
Click here to see answer by Jk22(389)

Question 373220: My friend is having trouble with this problem. She needs to see how it is worked out with the answer.
[6.2-(0.4-5)][-3.02-(5-4.2)
Click here to see answer by rfer(16322)

Question 373777: 5a-(a+b)-[2a-b-(3a+5b)] I don't understand how to do this problem.
Click here to see answer by ewatrrr(24785)

Question 373779: (48a+b)-(-22a-6b) how do i do this? do I take it like this: (48a+22a)-(b-6b) and how does it become 70a+9b?
Click here to see answer by Fombitz(32388)

Question 374039: Write this expression in factored form
3r(5x-1)+7(5x-1)
Click here to see answer by jim_thompson5910(35256)

Question 374045: Evaluate the expression: 3x divided by 2n if x = 4 and n=3.

Click here to see answer by checkley79(3341)

Question 374259: find the limit as x approaches 1^+ of
lnx tan(pi(x)/2)
answer: -2/pi
how do you solve for the limit?
Click here to see answer by Edwin McCravy(20060)

Question 374646: Evaluate -6 + x � 4(8 � x^2) for x = -4. Please show all of your work
Click here to see answer by rfer(16322)

Question 374742: 2x^2-10x+8-7x-5x^2
Click here to see answer by jim_thompson5910(35256)

Question 374818: Simplify. Please show all of your work.
-10x + 2x2 � 6x3 + 5(6x + 4x2 � 3x3)

Click here to see answer by vasumathi(46)

Question 374817: -4/9+ 3/10
. Perform the indicated operation and, if possible, simplify. Please show all of your work
Click here to see answer by vasumathi(46)

Question 374816: Area of a triangle with base b and height h
a=1/2 bh, for b
Click here to see answer by vasumathi(46)

Question 374814: solve t-7.4=-12.9
Click here to see answer by vasumathi(46)

Question 375057: 12-3n+4(2n+5)
Click here to see answer by jim_thompson5910(35256)

Question 375644: Evaluate and, if possible, simplify.
-6-x/12 for x = -6
Click here to see answer by rfer(16322)

Question 375646: Simplify. Please show all of your work.
2-3^3/27-7+30
Click here to see answer by rfer(16322)

Question 375645: Simplify. Please show all of your work.
5a^2 � 12b^2 � 3(a^2 � 10b^2)

Click here to see answer by user_dude2008(1862)

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