please help with q13, 16 and 18!

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secondary 2 | Maths
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secondary 2 Maths Singapore

please help with q13, 16 and 18!

Date Posted: 3 years ago

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Pls verify... Q16 & Q18 in next photo...

Date Posted: 3 years ago

done {{ upvoteCount }} Upvotes

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Pls verify ...

Date Posted: 3 years ago