3 years ago

What related number sentence shows the commutative property of addition? 3+9=12

1 answer:

7 0

Easy all you have to do is do 3 + 9 equals 20 which we all know that because we're in high school haha anyways back to what you do 3 + 9 which equals 12 we do we have to flip it around so if you sent it around it will be 12 equals 9 + 3 no I just read it so it would be 12 plus 9 which equals 3 which we know that so you have to flip the device which is going to eat with 3 or 12 - 9 which is going to eat you 3 that's what I'm going to put with that

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tino4ka555 [31]

Answer:

The rectangle is 10 cm by 18 cm.

Step-by-step explanation:

Let x represent the distance from the center of the rectangle to the longer side. Then the distance to the shorter side is x+4. The short side of the rectangle will have length 2x, and the long side will have length 2(x+4) = 2x+8.

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56 = 2(2x +(2x+8)) = 8x +16

40 = 8x . . . . . . . subtract 16

40/8 = x = 5 . . . divide by the coefficient of x

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3 years ago

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Answer:

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Step-by-step explanation: