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

Tutors Answer Your Questions about expressions (FREE)

Question 487048: Please help me determine what I am doing wrong while trying to simplify this expression:
-(-y)^2(y)^2
(y)^2(y)^2
y^4
Click here to see answer by jim_thompson5910(35256)

Question 487373: simplify show all of the steps to arrive at your answer
(18)(-18)+30(-16)
Click here to see answer by rfer(16322)

Question 487885: I have a math problem the book gives and answer of 53 but I am getting 43 I am wondering if I am correct or the book... thanks the question is
(13-2)x 5-2
thx again
Click here to see answer by chessace(471)

Question 487936: what is three more than twice a number is nine?
What would be the equation for that?
Click here to see answer by chessace(471)

Question 488703: Evaluate n-5 where n=8
Click here to see answer by richard1234(7193)

Question 488760: Please help me with this Algebra problem.
Perform the indicated opperation and, simplify if possible. Thank you.
1/11 + (- 5/6)
Click here to see answer by richard1234(7193)

Question 488763: Please help me with this algebra problem
Perform the operation and, simplify if posspible please show all work. Thank you very much.
- 2/3 - (- 2/7)
Click here to see answer by stanbon(75887)

Question 489137: what is the algebraic expression to the phase..evaluate u + xy, for u = 10, x = 4 and y =4. I'm so confused
Click here to see answer by jorel1380(3719)

Question 489151: how to solve the equation (4w2 - 7w - 5) - (7w2 + 2w - 3)
Click here to see answer by jorel1380(3719)

Question 489936: -(z-5)=
Click here to see answer by stanbon(75887)

Question 490091: I need to simplify this expression. 5(x-6)+(10-7)+3
Click here to see answer by lupe17(2)

Question 490350: The amount of money Mika has if she has some quarters?
Click here to see answer by tuxrocks(3)

Question 490535: (23+3!)/2
in detail steps
Click here to see answer by stanbon(75887)

Question 490534: 23(+3!)/2
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Question 490668: Where do I put the parentheses in this equation 7+9times3-1=25?
Click here to see answer by John10(297)

Question 490642: Simplify.
-5[-65-(-79-25]
Click here to see answer by jim_thompson5910(35256)

Question 490796: x/y-5/x+2/y x=30 y=6
I am at this point 30/6-5/30+2/6
where do I go from here
Thanks
Click here to see answer by Alan3354(69443)

Question 491093: 28t−(24t+87) simplify
Click here to see answer by rfer(16322)

Question 491206: 1. The cost, in millions of dollars, to remove x % of pollution in a lake modeled by
a. What is the cost to remove 75% of the pollutant? Show how you arrived at the answer.
b. What is the cost to remove 90% of the pollutant? Show how you arrived at the answer.
c. What is the cost to remove 99% of the pollutant? Show how you arrived at the answer.
d. For what value is this equation undefined? Show how you arrived at the answer.
e. What can you conclude from the answers to parts a through d? Is it possible to remove 100% of the pollution from the lake? Explain why or why not.

Click here to see answer by stanbon(75887)

Question 491801:
Click here to see answer by ptth176(50)

Question 492015: (x3y2 + 4x2y3 + 4xy − 7) + (x2y3 + 3x3y2 − 2xy − 2) sorry I only now that the question is to simply this.
Click here to see answer by MathLover1(20850)

Question 492140: Need help, explain so I can do problems.
evaluate expression for value given 4.9 + a for a = 37.2
thanks
Click here to see answer by Theo(13342)

Question 492882: evaluate functions in equation form:
problem is f(x)=3x(squared) minus 4x plus 1
where f(a-2)
meaning plug in (a-2) where x is in the problem
Click here to see answer by stanbon(75887)

Question 493037: 2a-3b=-2
-2a+b=-6
Click here to see answer by Alan3354(69443)

Question 493045: ab for a = 6 and b = 5
Click here to see answer by Alan3354(69443)

Question 493377: what is the cost for 5 months if the expression is $25 for a connection fee and $16 per month?
Click here to see answer by stanbon(75887)

Question 494728: 5x squared = 270 I keep getting -6 square root 3, 6 square root3. But that's not right
Click here to see answer by Alan3354(69443)

Question 494813: Algebraic expression --the quuestion is. What is half the distance to school?????this need to be translated to algebaic expression?? Trying to help with 8th grade homework...thank you!!!!!
Click here to see answer by stanbon(75887)

Question 494893: the sum of two numbers is 12. if x represents the larger number , then the smaller number is represented by x-12

Click here to see answer by richard1234(7193)

Question 495047: my math teacher gave us a question like this.....find out if the statement is always,sometimes,or never true.here is the statement
-(positive)(positive)(-negative)=negative
me and my dad dont get why there is a - before the problem because on the next question one of the paranthesis says it without a - but the other one does.My paper is due monday and i need to understand the question so please reply fast!!
_______________________________________________________________________________
Click here to see answer by Alan3354(69443)

Question 495105: b.The time it takes to multiply two matrices of size n is determined by the polynomial expression 2n� � n�. For example, it takes 45 operations to multiply two 3x3 matrices. Compute the number of operations required to run a program that multiplies two matrices of size 20.

Click here to see answer by Edwin McCravy(20060)

Question 495330: Trying to factor -18a^2 + 17a + 15. All I can get at this point is multiplying -18 with 15 equals -270.
Click here to see answer by Earlsdon(6294)

Question 495514: I am confused on a question and my homework is do tommorrow. The question in the textbook says, Simplify the expression. Explain each step. 6+(5+x). I need help and fast.
Click here to see answer by josmiceli(19441)

Question 496420: How will you slove this equation? The sign are absolute value and you don't have to slove it but I want to know how will I set it up to slove it.
|-4x+7| = |1+6x|

Click here to see answer by Edwin McCravy(20060)

Question 496835: how do i get from:
√36 + 81
to:
3√13?
i don't understand how to simplify radicals or square roots or whatever they are called.
Click here to see answer by josmiceli(19441)

Question 496835: how do i get from:
√36 + 81
to:
3√13?
i don't understand how to simplify radicals or square roots or whatever they are called.
Click here to see answer by lmeeks54(111)

Question 497749: Using multiplication principle, solve this -2x < -8.
Click here to see answer by Alan3354(69443)

Question 497749: Using multiplication principle, solve this -2x < -8.
Click here to see answer by lwsshak3(11628)

Question 497783: Please help me on this problem: 28/7 (5)
Click here to see answer by Alan3354(69443)

Question 498562: simplify the expression. explain each step 8+(7+x)
Click here to see answer by rfer(16322)

Question 499285: 3 brothers went on a vaction. matt spent $25 less than todd. jeff spent 3 times as much as matt. they spent $375 all together. how much did they all spend?
Click here to see answer by Maths68(1474)

Question 498465: 5x+1=2x+7
Click here to see answer by Flannery(124)

Question 499403: Need help with the order of operations. Please help me figure out what I'm doing wrong =/
36 � 4(5 - 2) + 6 =
So I know the order is PEMDAS (Parenthesis/brackets, Exponents, Multiplication/Division, Addition, Subtraction). So I believe you would start by subtraction 2 from 5.
So...
36 � 4 (3) + 6 =
So multiplication comes next
36 � 12 + 6 =
Then division
3 + 6 =
Then at last Addition
9
Somewhere I keep getting this all wrong and it's really frustrating me. Please help, and thanks. Oh and any other examples you could show me of how to do these kind of problems would be greatly appreciated. Or websites with practice problems or anything that could help really.

Click here to see answer by jim_thompson5910(35256)

Question 499457: Using the result
ncr + ncr-1 = n +1cr
compute
10c5 +10C4

Click here to see answer by richard1234(7193)

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