help w the circled questions(14,15,18) please!!

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secondary 3 | A Maths
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secondary 3 A Maths Singapore

help w the circled questions(14,15,18) please!!

Date Posted: 2 months ago

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

hi! dont need the questions anymore! thankyou!
-poppins

Date Posted: 2 months ago