Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.



Question

secondary 2 | Maths
One Answer Below

Anyone can contribute an answer, even non-tutors.

Answer This Question
Keiko
Keiko

secondary 2 chevron_right Maths chevron_right Singapore

Help with this two qns thanks in advance

Date Posted: 2 years ago
Views: 436

See 1 Answer

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Daniel Poon
Daniel Poon's answer
27 answers (Tutor Details)
1st
For questions related to direct proportion, recall that you let y be equal to the product of a constant k and the quantity that it y is proportional to. In this case, you let y = k (x^3). Substitute in the values to find the value of k. Use the expression you obtained for y to solve part (b).

For 17(c), let the value for x substituted be in terms of x, in this case, 1.2x. Then find the percentage change.

Question 18 uses the same approach as question 17.