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

Tutors Answer Your Questions about expressions (FREE)

Question 175805: 6) Evaluate 2x3y � 5xy2 +5xy + 3y � 4 for x = -2 & y = +3

7) Simplify (12x3y3 � 5x2 + 3y2) � (4x3y3 + 6x2y � 3x2 + 5)

8) Simplify ((-8a-1b-3)/(2a3b))-2

help pleaseeeeeeeeeeeeeeeee!!!
Click here to see answer by EMStelley(208)

Question 175818: Use multiplying by 1 to find an expression equivalent to 5/17 with a denominator of 119x
Click here to see answer by nerdybill(7384)

Question 175819: Use multiplying by 1 to find an expression equivalent to 5/17 with a denominator of 119x
Click here to see answer by stanbon(75887)

Question 175675: Hello, I'm stumped with these problems. Also can you show me how you came to your answer, so I can better understand it. Thanks
13) Simplify SR(45x^23)

14) Simplify 4th root of (x^5 divided by 16y^15)

15) Simplify (x1/4 y1/2)2(x2y3)1/2

Click here to see answer by ankor@dixie-net.com(22740)

Question 175803: 13) Simplify SR(45x^23)

14) Simplify 4th root of (x^5 divided by 16y^15)

15) Simplify (x1/4 y1/2)2(x2y3)1/2
thanks so much!!
Click here to see answer by Alan3354(69443)

Question 175862: 54.) simplify...(x+2)(x�+x+5)...just need help with this one. please
Click here to see answer by stanbon(75887)

Question 175863: 18) 49x7 �28x5 �7x4

7x�

Click here to see answer by stanbon(75887)

Question 175437: USE RULES when possible to simplify: can you help me please? and can you show how you got it. Thanks Thanks

12) (x�-y�) - (-6x�+x�y-xy�+2y�)

13) (3x-y)(2x+5y)

14) (7xy�-10y)(7xy�+10y)

15) (xy+ab�)(xy-ab�)

Click here to see answer by EMStelley(208)

Question 175917: simplify.....thanks so much
35) (-64)^1/3 =
36) (81)^1/4 =

Click here to see answer by jim_thompson5910(35256)

Question 175916: simplify
16) (-2a8 / b�)5

17) �15y13 / 45y9
thanks

Click here to see answer by jim_thompson5910(35256)

Question 175678: 1.) Simplify (13x4 � 3x3 + 2x2) � (4x5 � 6x4 + 5x3 + 2x2 � 4x0)

2) Simplify 5x3(4x2 � 11x)

3) Simplify (3y � 2)(4y2 + 3y �5)

can you please show me how you got the answers?

Click here to see answer by EMStelley(208)

Question 175933: Simplify

23) (5x�)�/x7

24) (x6 / x�)-3

Click here to see answer by stanbon(75887)

Question 175959: 20)4^-2
simplify
Click here to see answer by josmiceli(19441)

Question 175959: 20)4^-2
simplify
Click here to see answer by tutorcecilia(2152)

Question 175960: 22) x-12 / y-1
simplify
Click here to see answer by stanbon(75887)

Question 175958: 18) 49x7 �28x5 �7x4
7x�

19) 25x8 � 50x7 + 3x6 � 40x5
-5x^5
simplify
Click here to see answer by checkley75(3666)

Question 175957: 188.) (7xy�-10y)(7xy�+10y)

221.) (xy+ab�)(xy-ab�)
simplify....thanks

Click here to see answer by stanbon(75887)

Question 175957: 188.) (7xy�-10y)(7xy�+10y)

221.) (xy+ab�)(xy-ab�)
simplify....thanks

Click here to see answer by checkley75(3666)

Question 175989: 243.) 3x�*5x14 / 20x14...simplify
....thanks...this is my last homework problem. thanks
Click here to see answer by stanbon(75887)

Question 176079: 14-3m*2=13 can you help solve

Click here to see answer by Alan3354(69443)

Question 176256: Please evaluate question.
A=3 b=9 c=6
Evaluate 5ab ??
Im stuck, Thank you!
Click here to see answer by Mathtut(3670)

Question 176255: What is the average temperature of these three days?
1.70
2.62
3.72
Please explain how I would figure this?
Thank You!
Click here to see answer by Mathtut(3670)

Question 176253: x=5 y=7
evaluate xy

Thank you very much, I am new to algebra and confused on this particuliar evaluation?
Click here to see answer by Mathtut(3670)

Question 176263: 7/m^2n-2/5mn
Click here to see answer by stanbon(75887)

Question 176271: (5y/((y^2)-3y))-(7/(3-y))
Click here to see answer by Alan3354(69443)

Question 176445: Can someone help me with this problem I have to evaluate the expression

-3to the second power-5[4-2(4-9)

Click here to see answer by jim_thompson5910(35256)

Question 176724:
Click here to see answer by Mathtut(3670)

Question 176940: Good evening, I am back in algebra and I am lost:(. How do you factor:
-5w - 5u + wy +yu? Any help would be appreciated
Click here to see answer by jim_thompson5910(35256)

Question 177171: i am trying to solve this problem..... (3x) to the -1/3 power using log table???
Click here to see answer by Earlsdon(6294)

Question 177314: Remove the parentheses. �(3x + 5y)
Click here to see answer by jim_thompson5910(35256)

Question 177405: I need to remove all brackets & parentheses and simplify"
9{[4(m-5)+19] - [2(5m-2) +1]}
please show me step by step
Click here to see answer by jim_thompson5910(35256)

Question 177535: 3) The lengths of the sides of an irregular octagon are measured in metres and are given by the following expressions:
x, (x -2), (x -3), (x + 5), 3x -2, 6, 2x + 8 and 2(x +5).
a) Create an equation for the perimeter P of the octagon and then simplify the expression.
The total length of the perimeter of the octagon is 86m.
b) use your answer to part a) to find x and the length of al the sides of the octagon.

Click here to see answer by Fombitz(32388)

Question 177701: At 9:00 a.m. a truck leaves the truck yard and travels west at a rate of 45 mi/hr. Two hours later, a second truck leaves along the same route, traveling at 55 mi/hr. When will the second truck catch up to the first?
Click here to see answer by kollanag(3)

Question 177702: How many pounds of hamburger that costs $1.60 per pound must be mixed with 70 pounds of hamburger that costs $2.10 per pound to make a mixture that costs $1.70 per pound
Click here to see answer by stanbon(75887)

Question 178214: After fully simpifying the expression
2*x^2+7*x+3 over x^2+3*x-4 divided by x^2+7*x+12 over 2*x^2-3*x+1
The numerator is (2*x+1)*(2*x-1)
The denominator is
Remember to invert and multiply, factor and cancel
Ok, I can get the numberator, but I am not sure how to get the denominator, any help with is problem will be greatly appreciated. Thank you.

Click here to see answer by solver91311(24713)

Question 178072: 4.2+(3.8 x 3.8 x 1 over 4) - 5 =

Click here to see answer by Alan3354(69443)

Question 178506: x+y
a+b
x2-y2
a2-b2

Click here to see answer by Mathtut(3670)

Question 178430: (b^2/-3a^4)3 how do I write this without the parentheses?
Click here to see answer by Mathtut(3670)

Question 178430: (b^2/-3a^4)3 how do I write this without the parentheses?
Click here to see answer by Alan3354(69443)

Question 178618: solve for b
a:b=c:(d+6)
Click here to see answer by checkley75(3666)

Question 178898: Evaluate the expression using the given value
-0.2(x+3)+4; where x=1
Click here to see answer by Mathtut(3670)

Question 178899: Evaluate the expression using the given value
2y^-4y+3: where y=1/2
Click here to see answer by Mathtut(3670)

Question 179129: I do not understand the process of evaluating expressions with fractions. I am trying to assist my 11 yr old daughter w/ her Math homework. Here is an example of a couple problems:
Evaluate n + 3/4 and 1 5/6 - n for each given value of n:
1.) n= 1/3

2.) n= 1 3/4
**PLEASE HELP US!!**
Click here to see answer by josmiceli(19441)

Question 179262: I am 32, my sister is 18. How old will I be when I am 3x's her age?
Click here to see answer by stanbon(75887)

Question 179143: a-2b/a+2b = 1k+1
solve for a:
Click here to see answer by monika_p(71)

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