Questions on Algebra: Distributive, associative, commutative properties, FOIL answered by real tutors!

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Algebra: Distributive, associative, commutative properties, FOIL

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Question 95435: =+
What is B?
I tried the following approach:
7=A*(x+9)+B*
7=x*(A+Bx)+9A+5B
7=9A+5B & x(A+Bx)=0
I could only say B=(7-9A)/5 & either x=0 or x=-A/B
I'm not sure how to move from here to the next in order to find the solution.
Could you help? The question was given by teacher on the board, not from a textbook.
Click here to see answer by stanbon(26259)

Question 95474: what type of property is the following
-1.7+15=15+(-1.7)
I think it is associative
Click here to see answer by stanbon(26259)

Question 95517: Hello!
I have tried to work this problem out but my answer doesn't appear to work when I plug it back in. I must be doing something wrong.
Solve the following equations algebraically:
(x+7)*(x-1)=(x+1)^2
Here is my work:
I foiled both of the sides to come up with:
x^2+7x-1x-7=x^2+2x+1
I brought over the right side to give me:
4x=-6
x=-3/2
I could be doing this totally wrong.
Any help will be greatly appreciated.
Click here to see answer by edjones(3292)

Question 95112: I need help with two problems...pls help if you can:
4.3a+2(a+6b)
9[5+3(x+2)]
Click here to see answer by vertciel(183)

Question 95572: If I have 2(N sq. + 1)-3(2N sq. - 3) and I need to solve for N, how do I work the squared N?

Click here to see answer by checkley71(8405)

Question 95410: I am using the Distributive property here, and i have to simplify each expression. This problem has me stumped.
3(e-4f-ef)
Suggestions? Thank you.
Click here to see answer by kiljoy(51)

Question 95664: 2*(3*7)=(2*3)*7
Click here to see answer by stanbon(26259)

Question 95848: Tell whether true or false.
Division of of whole numbers is associative.
Click here to see answer by kev82(145)

Question 95860: How do I figure this out?
2x squared + 5x + 3
I need to make this into a binomial
thank you
Click here to see answer by checkley71(8405)

Question 96158: hi! i don't know if this would be considered in this category because it involves factoring.i thought this was the closest to it.
a^2(x+y)+b^2(x+y)
i don't know where to start because after you use foil there is no GCF. What do i do after that?
Click here to see answer by checkley71(8405)

Question 96170: hi tutors. i need somebodys help please i have a factoring problem here and i just cant get it .
1/4x^2-9/16y^2
that's the problem
Click here to see answer by stanbon(26259)

Question 96240: Can you help me with this answer:Simplify using distribution
2(x^2 - 6x) - 2(3-x) + 1 - 4x =
I can't figure it out. Your help is urgently needed. I don't have an ISBN #
Thank you
Click here to see answer by tutorcecilia(2042)

Question 96412: w+14w-6w

Click here to see answer by checkley71(8405)

Question 96408: 16(3b-0.25)
Click here to see answer by checkley71(8405)

Question 96878: how do you write this into a equivalent expression using the distributive property 4(1+y)
Click here to see answer by coyote(32)

Question 96930: 2x+4
Click here to see answer by wennie15(8)

Question 97039: How do you factor x^3+8?
Click here to see answer by Earlsdon(4898)

Question 97039: How do you factor x^3+8?
Click here to see answer by mathslover(126)

Question 97096: how do I do this problem: 4x+5y+6x
Click here to see answer by checkley71(8405)

Question 97096: how do I do this problem: 4x+5y+6x
Click here to see answer by elima(1433)

Question 97150: (x+h)(x+h)(x+h)= ?
What's the method for solving this equation? I know FOIL for (x+h)(x+h)= , but not the method for cubing.
Click here to see answer by stanbon(26259)

Question 97150: (x+h)(x+h)(x+h)= ?
What's the method for solving this equation? I know FOIL for (x+h)(x+h)= , but not the method for cubing.
Click here to see answer by checkley71(8405)

Question 97315: this is hard: 698d+(y+93)(83d+22a)+(-74y)

I think this problem should be outlawed. lol
good luck.
Click here to see answer by jim_thompson5910(13787)

Question 97608: 5(-3x+4)=
Click here to see answer by checkley71(8405)

Question 98048: What property would you use to simplify (8.9 plus 2.4) plus 7.6?
Click here to see answer by kiljoy(51)

Question 89850: using the distributive property what is the answer to -(3x-4)
Click here to see answer by 303795(562)

Question 98418: Use the distributive property to remove the parentheses in the following expression. Then simplify your result if possible. 1/4(20+16)
Click here to see answer by checkley71(8405)

Question 98607: m+ax^2+bx+c for b
I have no idea how to do this please help me!
Click here to see answer by checkley71(8405)

Question 98608: 9ax+3c-2bx+3d=4c-6ax for x
Please help me do this problem!
Click here to see answer by jim_thompson5910(13787)

Question 98700: Explain why we cannot square a sum by simply squaring each term of the sum. For example, (a+b)square 2 is not equal to a square + b square. Provide appropriate example.
Click here to see answer by doukungfoo(195)

Question 98854:
Click here to see answer by chitra(359)

Question 98768: This is on a practice worksheet, 2.1, question 5: In exercises 5-16, use the distributive property to rewrite the expression: 2(3 + 5)
Click here to see answer by elima(1433)

Question 98943: I AM A MOTHER OF 4 AND I WAS NEEDING TO CHECK MY SON'S HOMEWORK. I NEED TO GET THE ANSWER FROM TENNESSEE PRENTICE HALL MATHEMATICS PRE-ALGEBRA BOOK. IT'S ON PAGE 74. # 19. THE PROBLEM IS (V-3)4? I NEED TO DOUBLE CHECK HIS WORK. SO, PLEASE RESPOND AS SOON AS POSSIBLE... THANK YOU.
Click here to see answer by tutorcecilia(2042)

Question 98979: My problem is written as; I had to name the property in each step. The first step they switched the x, so I think it's symmetric. step 2, the x came to be on the outsid and I'm thinking that's reflexive. I need help on these steps bcause they are confusing.
x(y+1)+(-1)x = x(y+1)+x(-1)
= x [(y+1)]+(-1)]
= x[y+(1+ (-1))]
= x [y+0]
= xy
Click here to see answer by stanbon(26259)

Question 99217: is 7+4=4+7 a commutative properties or a associative properties?
Click here to see answer by Nate(3495)

Question 99207: Okay,I totally don't get distributive,associative OR commutative properties. And I have a major test next week!! could someone PLEASE explain it? like how do you know which to use? and what's the first step?
Thanks!
Click here to see answer by Nate(3495)

Question 99305: -2.5(2a-4)
Click here to see answer by edjones(3292)

Question 99325: what property is this equation? 3t + 2r= 2r + 3t
Click here to see answer by jim_thompson5910(13787)

Question 99296: use the distibutive property to simplify
8*5-12*5
Click here to see answer by timmy1729(23)

Question 99296: use the distibutive property to simplify
8*5-12*5
Click here to see answer by Adam(63)

Question 99440: ok.....what is the communtive property?
Click here to see answer by stanbon(26259)

Question 99550: Use distributive property to rewrite each expression.
9xy-21xyz
Click here to see answer by timmy1729(23)

Question 99550: Use distributive property to rewrite each expression.
9xy-21xyz
Click here to see answer by bucky(1732)

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