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

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Algebra: Evaluation of expressions, parentheses

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Question 34459: Joe has a collection of nickels and dimes that is worth $5.65. If the number of dimes were doubled and the number of nickels were increased by 8, the value of the coins would be $10.45. How many dimes does he have?
Click here to see answer by stanbon(26275)

Question 34458: An express and local train leave GraysLake at 3 P.M. and head for Chicago 50 miles away. The express travels twice as fast as the local and arrives 1 hour ahead of the local. Find the speed of each train.
Click here to see answer by mukhopadhyay(490)

Question 34607: For the system of linear equations in questions 1
- Determine how many solutions exist
- Use either elimination or substitution to find the solutions (if any)
- Graph the two lines, labeling the x-intercepts, y-intercepts, and points of intersection
3x + 7y = 3 and 12x + 28y = 16
Click here to see answer by checkley71(8405)

Question 34905: I need to know some properties to help simplify different expressions such as:
4a+2=, 4x+x+6y-3x=, 4*3g+2(g+6k)=, 12(a+3b+6c)=
I am working on 30 different problems with nothing to guide me. I have no textbook, just a sheet of paper with Pre-Algebra problems.
Can you please give me some rules or something to follow?
Thank you, Becki Ritter
Click here to see answer by lyra(94)

Question 35035: Simplify and evaluate:
(x3y-4z0/5x6y8)3
Can you help solve this in detail please?
Thank you
Click here to see answer by Cintchr(475)

Question 35096: For this question factor the algebraic expression completely.
16x^2 +40 +25
Click here to see answer by kay308(3)

Question 35095: For this question factor the algebraic expression completely.
x^2 -16x + 63
Click here to see answer by stanbon(26275)

Question 35095: For this question factor the algebraic expression completely.
x^2 -16x + 63
Click here to see answer by lyra(94)

Question 35094: simplify the following algebraic expression
Multiply: (3x + 4) (3x -4)
Click here to see answer by lyra(94)

Question 35094: simplify the following algebraic expression
Multiply: (3x + 4) (3x -4)
Click here to see answer by stanbon(26275)

Question 35100: simplify the following algebraic expression
- (2a^2b^7)^2
Click here to see answer by longjonsilver(2297)

Question 35091: Simplify the following algebraic expression.
Simplify (-4 + x^2 +2x^3) - (-6 - x + 3x^3) - (-6y^3+ y^2)
Click here to see answer by longjonsilver(2297)

Question 35090: Simplify the following algebraic expression.
Evaluate P(-1/2) if P(x) = 2x^4 + x^3 + 12
Click here to see answer by longjonsilver(2297)

Question 35088: Simplify the following algebraic expression.

200^0
---
400
Click here to see answer by Prithwis(166)

Question 35040: Solve the system of equations using the addition (elimination) method.
9x + 2y = 2
3x + 5y = 5
Please solve and explain..Thank you
Click here to see answer by Prithwis(166)

Question 35237: simplify the following algebraic expression

1000^0
-------
1000
Click here to see answer by prabhjyot(164)

Question 35356: simplify the rational expression
9x - 21 / 15x - 35
Click here to see answer by Cintchr(475)

Question 35395: simplify the following algebraic expression
Multiply: (3x + 3y)^2(2x + 3y)
Click here to see answer by lyra(94)

Question 35394: simplify the following algebraic expression
Multiply: (2s +5z)^2(s + 3z)^2
Click here to see answer by lyra(94)

Question 35393: simplify the following algebraic expression
(3x + 3y)^2(2x +3y)
Click here to see answer by lyra(94)

Question 35386: factor the algebraic expressions completely
6x^2 - 28x + 16
Click here to see answer by lyra(94)

Question 35391: simplify the following algebraic expression

(8x^3)^1/3 / (27y ^6)
Click here to see answer by rapaljer(3620)

Question 35388: simplify the following algebraic expression

(4y)^7 / (4y)^3
Click here to see answer by rapaljer(3620)

Question 35389: simplify the following algebraic expression

7(x^4)^5 (-4x^2)^2
Click here to see answer by rapaljer(3620)

Question 35512This question is from textbook Beginning Algebra

: 1. 5(x-3)+ 5= 3(x+2)-4

2. 3/4(x-2)+ 3/5= 1/5(x+1)

3. one-third of sum of a number and sevenThis question is from textbook Beginning Algebra

Click here to see answer by Nate(3495)

Question 35355: simplify the following algebraic expression
- (3a^6 b^4)^3
Click here to see answer by elima(1433)

Question 35532: How do we solve (2u+4)(u+1)
Click here to see answer by elima(1433)

Question 35354: Classify the given number as real and rational, real and irrational, or complex.
(4)^1/2 +2
Click here to see answer by elima(1433)

Question 35515This question is from textbook Beginning Algebra

: -3(x^2+3y)+5(-6y-x^2) SimplifyThis question is from textbook Beginning Algebra

Click here to see answer by elima(1433)

Question 35334: Simplify the following algebraic expression.

(8x^3 y^2 z^2) * 3x^2
------------------------
y^3 z^4
Click here to see answer by elima(1433)

Question 35743: Simply: (2 -3x)^2 I need to really understand how they came up with the answer to this one, I have my final tomorrwo. Th e other problem is find the y intercept for 2x - 3y =6. Thank you so very much for any help. Thank you Thank you.
Click here to see answer by rapaljer(3620)

Question 35857: if n=2, what does (5-n)^3 equal?
Click here to see answer by stanbon(26275)

Question 35856: if x=5, what does 2x^2 + x equal?
Click here to see answer by narayaba(40)

Question 35873: multiply, if possible simpliy

Click here to see answer by ilana(236)

Question 36437: (c-1)^2= 43.8 is given to me. How do i solve for c?
Click here to see answer by stanbon(26275)

Question 36597: Write without parentheses
(u/-3w^2)
Click here to see answer by checkley71(8405)

Question 36702: -4-11
______
3-(-2)
Click here to see answer by elima(1433)

Question 36754: I need to simplify this and cannot remember how. I must show work! Thank you for your wonderful help!
3^-2
Click here to see answer by hydromojo(20)

Question 36843: Gosh I need help here! If 5+3 x4 means 5+(3x4) and not (5+3)x4 because multiplication always takes precedence over addidtion(which I understand). What are the standard precedence rules for the usual operations in arthmetic.
P.S. Not sure if this a word problem. Thanks for any help I can get.
Click here to see answer by checkley71(8405)

Question 36981: 2x+3=9.x
Click here to see answer by checkley71(8405)

Question 37069: Hii i need help on this problem. And the question says write each expression as a simple fraction... -5 to the -3 power
Click here to see answer by stanbon(26275)

Question 37234: Hey, I'm really having trouble with this problem...I can't figure out which step to do first!
(((5-4w+12=-2(3w-8)+w)))
I know how to do the Distributive Property, and I simplified the expression down to [5-4w+12=-5w-16], but after that I am at loss for what to do next. I really need an answer by tomorrow morning, if possible, and I would appreciate it SOOOOOO much! Thank you!
Rachel
Click here to see answer by checkley71(8405)

Question 25962: Expand and simplify 3w+2(w+x)
Click here to see answer by weepingwillowcats(10)

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