Answers>Maths>GCSE>Article

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

6311 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

What is the Pythagoras Theorem?

Write x^2+4x-12 in the form (x+a)^2+b where a and b are constants to be determined.

How can you help me?

Solve simultaneously: x^2+y^2=25 and y-3x=13