f(x)=2x+c, g(x)=cx+5, fg(x)=6x+d; c and d are constants. Work out the value of d

f(g(x))=2(cx+5)+c

fg(x)=2cx+10+c

2cx=6x

2c=6

c=3

10+c=d

d=13

IB
Answered by Imogen B. Maths tutor

5887 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Simplify the fraction 54x^(6)y^(13)/6x^(3)y^(9).


Evaluate 5/(x−1)+2/(x+4)


How do I approach simultaneous equations with 2 unknowns?


State the nth term of the following sequence: 3, 7, 11, 15, 19


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:

© 2026 by IXL Learning