y is inversely proportional to d2 when d = 10, y = 4 d is directly proportional to x2 when x = 2, d = 24 Find a formula for y in terms of x. Give your answer in its simplest form.

y=k/d2
substituting:4=k/102
4=k/100
400=k
d=nx2
substituting:24=n x 22

24=4n
n=6
Eq1:y=400/d2
Eq2:d=6x2
y=400/(6x2)
y=400/36x4
y=200/13x4

Answered by Abi I. Maths tutor

12516 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

y is inversely proportional to d^2 and when d = 10, y = 4. d is directly proportional to x^2 and when x = 2, d = 24. Find a formula for y in terms of x. Give your answer in its simplest form.


Expand and simplify (x – 2)(2x + 3)


there are 11 sweets in a box four are soft centred and seven hard centred sweets two sweets are selected at random a)calculate the probability that both sweets are hard centred, b) one sweet is soft centred and one sweet is hard centred


Solve 7x - 14 = 4x + 7


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences