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Rashid [163]
4 years ago
13

Which equation applies the associative property of multiplication?

Mathematics
2 answers:
nekit [7.7K]4 years ago
6 0

Associative property of multiplication

Answer

−5/12⋅(6/5⋅1/3)⋅92=(−5/12⋅6/5)⋅(1/3⋅9/2) ​

Trust me i took the test

qwelly [4]4 years ago
3 0
<span>associative property of multiplication

answer
</span><span>−5/12⋅(6/5⋅1/3)⋅92=(−5/12⋅6/5)⋅(1/3⋅9/2) ​</span>
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Given the trinomial, what is the value of the coefficient B in the factored form? 2x2 + 4xy − 48y2 = 2(x + By)(x − 4y) −12 12 −6
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B is 6.

Step-by-step explanation:

We are trying to find a value for B such that:

2x^2+4xy-48y^2=2(x+By)(x-4y) is true for every x,y.

So let's choose x=0,y=1:

2(0)^2+4(0)(1)-48(1)^2=2(0+B(1))(0-4(1))

2(0)+0-48=2(B)(-4)

0-48=-8B

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Divide both sides by -8:

\frac{-48}{-8}=B

6=B

B=6

Note: I didn't want to choose y to be 0 because the value of B would disappear from the equation. So you should be able to have chosen any x and y except for y=0 to solve the equation for B.

Check:

So let's check and use foil to multiply out the right hand side.

(x+6y)(x-4y)

x(x)+x(-4y)+6y(x)+6y(-4y)

x^2-4xy+6xy-24y^2

x^2+2xy-24y^2

There was a 2 in front of that multplicapltiation:

2(x+6y)(x-4y)

2(x^2+2xy-24y^2)

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This is exactly what we have on the left hand side of your given equation.

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4 years ago
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