If the functions f and g are defined: f: x--> x/5 + 4 g : x--> 30x + 10. what is x, if fg(x) = x. ?? What would fgf(x) = x^2 be??

You should insert function g into function f. (30x + 10) / 5 + 4 = 0 6x + 2 + 4 = 0 6x + 6 = 0 x = -1
This is a more complex problem:You need to do a similar task but you should do it in steps.gf(x) = 30 (x/5 + 4) + 10gf(x) = 6x + 130fgf(x)= (6x+ 130)/5 +46/5 x + 30

6/5x + 30 = x1/5x = -30x= -150

LM
Answered by Lottie M. Maths tutor

3776 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

A curve C has equation y = x^2 − 2x − 24sqrt x, x > 0. Prove that it has a stationary point at x=4.


What is differentiation?


What is integration by parts?


Express 3/2x+3 – 1/2x-3 + 6/4x^2-9 as a single fraction in its simplest form.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning