Questions on Algebra: Expressions involving variables, substitution answered by real tutors!

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Algebra: Expressions involving variables, substitution

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Question 119904: I would love someone to help me answer this question.
I need to write a equivalent expression to the following without parenthesis.
-(z+92) Would someone please explain to me how to do this. Thank you so much for any help given.
Click here to see answer by bucky(1732)

Question 119909: I have been asked to factor this and not sure exactly what I am to do. Please show me the way to factor this 6m - 6n - 60 = ?
Thanks so much for the help.
Click here to see answer by Earlsdon(4898)

Question 119911: Find all values of x so that y = 0
y=5[x-(7-x)] - 9(x+1)
I have followed their minute details and still get it wrong - HELP
I've tried:
0=5[x-7+x] - 9(x+1) (distributive property in brackets)
0=5[2x-7] - 9(x+1) (combining likes in the bracket)
0=10x - 35 - 9x -9
0=x -44 ?????????
where am I going wrong?
Thanks - Nancy

Click here to see answer by Earlsdon(4898)

Question 119994: Please help due friday I forgot how to do this.
factor. -24x^3-56x^2

Click here to see answer by ankor@dixie-net.com(6691)

Question 120021: Please help!! Been out of school 14 yrs...
Directions: Solve for the indicated variable.
1. 5x + y = 8;y <--- wanting to say do what??

And this one.
Directions:
Tell which equation you would use to isolate a variable. Explain your reasoning.
1. 3x - y = 5
2x + y = 0
I just don't get it!
Click here to see answer by stanbon(26259)

Question 120033: find the GCF of the product. (3b+6)(2b-10)
i think it is 6.
Click here to see answer by jim_thompson5910(13787)

Question 120017: y=9-x
x-y=7
Click here to see answer by HyperBrain(694)

Question 120191: PLease help me solve for the 3 different values of x. I came up with 9/3,1,0.
Thank you. 18x^2-12x^3=0 Also, 9x^2-3x+0
Click here to see answer by jim_thompson5910(13787)

Question 120195: how do you figure out the problem :

8(w+1)-6=26 wat is w ??
Click here to see answer by jim_thompson5910(13787)

Question 120195: how do you figure out the problem :

8(w+1)-6=26 wat is w ??
Click here to see answer by checkley71(8405)

Question 120201:
6(x-7)-2(3+4)+3(x)=34
Click here to see answer by checkley71(8405)

Question 120244: A machine can produce a certain number of pages twice as fast as another
machine. Operating together these machines can produce this number of pages
in 8 minutes. How long would it take each machine, working alone, to produce
this number of pages?
Click here to see answer by Edwin McCravy(2920)

Question 120262: I have three prizes. the value of the second prize is five-sixths the value of the first prize, and the value of the third prize is four-fifths the value of the second prize.
I have to express the total value of the three prizes as an algebraic expression
Click here to see answer by checkley71(8405)

Question 120272This question is from textbook pacemaker algebra 1
: 4t=-20This question is from textbook pacemaker algebra 1

Click here to see answer by MathLover1(1183)

Question 120271This question is from textbook pacemaker algebra 1
: 0=t-7This question is from textbook pacemaker algebra 1

Click here to see answer by MathLover1(1183)

Question 120245This question is from textbook Prentice Hall Algebra 1
: One watering system needs about 3 times as long to complete a job as another watering system. When both systems operate at the same time, the job can be completed in 9 minutes. How long does it take each system to do the job alone?
Thanks.
EliThis question is from textbook Prentice Hall Algebra 1

Click here to see answer by stanbon(26259)

Question 120278: a web designer is trying to put 4 characters on a page. the space occupied by character 2 takes 5 units more than character 1. character 3 takes 7 units less than character 2. character 4 takes the same amount of space as character 2. i have to find the total space occupied by all the characters in an algebraic expression
Click here to see answer by stanbon(26259)

Question 120274: there are three prizes. the value of the second prize is five-sixths the value of the first prize. the third prize is four-fifths that of the second prize.
I have to express the total value of the three prizes as an algebraic expression.
Click here to see answer by stanbon(26259)

Question 119874This question is from textbook GEOMETRY
: THIS IS THE QUESTION FROM MY BOOK: FIND THE LENGTH OF EACH SIDE OF THE POLYGON FOR THE GIVEN PERIMETER. P=84 AND THE SIDES ARE 8X+3, 6X+4, 6X-3. PLEASE HELP ME.This question is from textbook GEOMETRY

Click here to see answer by solver91311(5072)

Question 120350: i dont kno0w how to sove for substitution elimination or graphing for this problem 2x-y=1 and 3x+y=-6
Click here to see answer by jim_thompson5910(13787)

Question 120350: i dont kno0w how to sove for substitution elimination or graphing for this problem 2x-y=1 and 3x+y=-6
Click here to see answer by solver91311(5072)

Question 120369: how do you solve 9x-3y=9 and x+3y=11 using graphing or eliminTION
Click here to see answer by jim_thompson5910(13787)

Question 120370: -3a^2b DIvided by 35a^5 TIMES 14a^3b^2 divided by -9b^4
Click here to see answer by jim_thompson5910(13787)

Question 120417: How can I solve 3a + 5b = 31
7a + 5b = 59

Using elimination? (or linear combination method)

Thanks!

Click here to see answer by jim_thompson5910(13787)

Question 120421: HOW DO YOU DO THIS ONE USING ELIMINATION OR SUBSTITUTION....9X-3Y=9 AND X+3Y=11
Click here to see answer by jim_thompson5910(13787)

Question 120379: i really need help with this one:
Given that, a=b+1
Prove that
Thanks in advance.
Click here to see answer by scott8148(3382)

Question 120453: how do you solve using elimination and substitution..i have 29 problems to answer so this helps me umm here is the problem 2x-7y=8 and 3x-4y=-1
Click here to see answer by jim_thompson5910(13787)

Question 120451: for graphing.....2x-7y=8 and 3x-4y=-1
Click here to see answer by jim_thompson5910(13787)

Question 120449: y=x+3
-7x-y=1
Click here to see answer by jim_thompson5910(13787)

Question 120433: The parabola y=x2-4 intersects the x axis at two points, P and Q. What is the distance from P to Q?
Click here to see answer by josmiceli(3003)

Question 120433: The parabola y=x2-4 intersects the x axis at two points, P and Q. What is the distance from P to Q?
Click here to see answer by bucky(1732)

Question 120483: factor the following by GROUPING.
x^3-3x^2+4x-12
Would it be 12-4x-3x^2+x^3?
Click here to see answer by MathLover1(1183)

Question 120541: (2c^2-8)/(4c^2-8c) DIVIDED BY (c^3+2c^2)/(8c^3)
Click here to see answer by jim_thompson5910(13787)

Question 120642: write in simplest form. x^2-15x+54 / x^2-36 thank you for the help in advance!
Click here to see answer by jim_thompson5910(13787)

Question 120713: (x/2)(2/3)=4 I can not remember what to do here to save my life. How do I work this problem?
Click here to see answer by nabla(412)

Question 120792: FInd the constant term that should be added to make the following expression a perfect square trinomail.
x^2+ 20x
Thanks
Click here to see answer by checkley71(8405)

Question 120101: 1. 7squared-3xsquared

Click here to see answer by 23572(1)

Question 120809: Subtract: write your answer in simplest form.
y-2/y+3 subtract y/2y+6

a. y-2/y+3
b. y-4/2(y+3)
c. 3y-4/2(y+3)
d. y^2+y-12/(y+3)(2y+6)

I do not understand how to work the problem out to get the answer, I know the LCD is 2(y-3)(y+3). Please help me , thank you in advance.
Click here to see answer by ankor@dixie-net.com(6691)

Question 120863This question is from textbook Algebra 1
:
1/2n+2/3m+1/2m+1/3nThis question is from textbook Algebra 1

Click here to see answer by checkley71(8405)

Question 120927: I'm also having trouble with this problem. I've tried cross multiplying, but I don't think that's what I'm supposed to do.
2x 2
--- = ---
3 3x-1
Click here to see answer by checkley71(8405)

Question 120940:
s=n/2(a+L); for L please show me how to solve this step by step.. thank you
Click here to see answer by checkley71(8405)

Question 120939:
6x-2y=11 x+3y=4
solve using substitution
Click here to see answer by jim_thompson5910(13787)

Question 120939:
6x-2y=11 x+3y=4
solve using substitution
Click here to see answer by checkley71(8405)

Question 120913: I need help with this problem, I don't understand it at all!
The sum of a number and its reciprocal is 3. What is (are) the numbers.
Click here to see answer by scott8148(3382)

Question 120972: I have been through all of my notes and have missed a lot of class sick. I need help figuring out
10x^4yz^3
_________
12x2yz7 I have no clue. Please explain how to work it and solve it
if possible
thank you

Click here to see answer by edjones(3292)

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