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Ronch [10]
3 years ago
7

Please help me please please.

Mathematics
1 answer:
Margarita [4]3 years ago
3 0

Answer:

4w+18

Step-by-step explanation:

The formula for the perimeter of a rectangle is:

P=2(l+w)

We know that the length l is w+9. Substitute:

P=2((w+9)+w)

Combine like terms:

P=2(2w+9)

Simplify:

=4w+18

And that's our expression :)

And we're done!

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