A few days ago
Anonymous

hey,u math lovers out there!?

can u help me w/my work?10 points!

here’s the instructions: Use the distributive property to rewrite the expresson:

1. 9(8+7)

2. 4(x+9)

3. 5(y+20)

4. 0(x+12)

5. r(s+t)

6. 3(5+8+9)

>>>>can u tell me how u got the answer?i’d like 2 learn!;)

Top 7 Answers
A few days ago
Jimmy

Favorite Answer

1. multiply the 9 by both the 8 and the 7 to get 72 + 63=135

2. multiply the x and the 9 by 4 to get 4x + 36

3. multiply the y and the 20 by 5 to get 5y + 100

4. since you’re multiplying two numbers by 0 then adding them, the answer is 0

5. multiply the s and the t by r to get rt+st

6. multiply the 5, 8, and 9 by the 3 to get 15 + 24+27= 66

how that works is that the “Distributive Property for Multiplication over Addition or Subtraction” allows you to get rid of the parentheses. Just as an example:

when you have 2(3+4), you could solve it using order of operations (pemdas) and simplify it to 2 * 7,then do that multiplication to get 14, or you can use the distributive property to get [(2*3)+(2*4)]then multiply the parentheses to get 6 +8, or 14.

both ways you get the same answer, but when you have variables (letters) in the problem, you can’t just add the values in the expression. example:

2(x+3) you cant add 3 and x, so you use the distributive property to get 2x and 6, for an answer of 2x+6

The important thing to remember is that the distr. prop. only works when you have multiple values within parentheses SEPARATED BY + or -. ex: 2(2+x) [answer 2x +4] NOT 2(2*3*4) [answer 48, but if you used the distr. prop. you would get 4*6*8, which is totally wrong.]

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A few days ago
DrakeLord
(9 x 8) + (9 x 7)

(X x 4) + (4 x 9)

(Y x 5) + (5 x 20)

(X x 0) + (0 x 12)

(R x S) + (R x T)

(3 x 5) + (3 x 8) + (3 x 9)

Kind of self-explanatory. Make two pairs of parenthesis, put the multiplier in each one, along with a number/letter from the original parenthesis.

EDIT: And to avoid confusion, Avi is incorrect and ajsolo simply answered the equation, rather than putting it in the form, like you want to do.

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A few days ago
mathvideosonline.com
9(8+7)= (9 x 8) + (9 x 7)

4(x+9)= 4x + (4 x 9)

5(y+20)= 5y+ (5 x 20)

0(x+12)= (0 x X) + (0 x 12)

r(s+t)= rs+ rt

3(5+8+9)=(3 x 5) + (3 x 8) + (3 x 9)

http://www.math-videos-online.com

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A few days ago
♥♥♥
u just multiply the answer outside the parenthesis by the each number inside the parenthesis. like this:

9(8+7)

9 x 8 = 72

9 x 7 = 63

72+ 63 = 135

135

theres the first one for u!

good luck!

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A few days ago
Anonymous
1. 9(8+7)=8(9+7)

2. 4(x+9)=x(4+9)

3.5(y+20)=y(5+20)

4.0(x+12)=x(0+20)

5.r(s+t)=s(r+t)

6.3(5+8+9)=5(3+8+9)

just switch two of the numbers and create a new equation.

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A few days ago
zanthus
I’m not sure what planet AVI took math on but his answers are completely WRONG!!

You multiply the number OUTSIDE the bracket by each term inside the bracket and use whatever math function is inside the bracket

5(x-y) for example means to first multiply 5 times x and then subtract 5 times y

so 5x-5y

in your question 5(y+20)

first multiple 5times y and add 5 times 20

5y+100

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A few days ago
san
> its like this.. if there is a grouping symbol like (),{},[]..solve the inner # first..but if you cant solve it futher..proceed to multiplication.. for example in #1.. you can add first the 8 and 7..then the answer will be multiplied to 9. so it will become 9(15).. the answer is 135.

> in #2. since you cant simplify further the #s inside the grouping symbol..ofcouse you cant add x and 9.. so proceed mow to multiplication..

its like this….

4(x+9)

4 times x plus 4 times 9.. simply distribute it..

the answer will be 4x + 36.

you may practice answering the other so that you will master it!!

goodluck!!

hope you understand i my explaination.

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