They found 15 seashells ( can you make this a brainliest ansswer pls )
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Answer: 12
Explanation: I counted
I hope this helped!
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- Zack Slocum
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1. 10 boxes
2. about 20
3. 6x100 + (6x9)x10 + 6x8
42/2=21 (is the sum of both lengths)
2x+11=21
2x=10
x=5
length= 16
width=5