Alden's answer to Kathy's Secondary 4 A Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Alden
Alden's answer
34 answers (Tutor Details)
1st
The one in the box is for the third question. The third question is actually the easiest if you manage to know how to substitute the numbers in