The functions f and g are such that f(x)=5x+2 and g(x)=-x-4. a) Find fg(x). b) Find ff(x). c) Solve fg(x) = ff(x).

a) fg(X) = 5(-x-4)+2 = -5x-20+2 = -5x-18b) ff(X) = 5(5x+2)+2 = 25x+10+2 =25x+12c) 25x+12=-5x-18 25x+5x=-18-12 30x=-30 x=-1


MA
Answered by Maria A. Maths tutor

4224 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Solve to find x: 32x + 43 = -8x - 17


Find the unknown side A ( trigonometry with one known side and an angle)


Make x the subject of the formula when: y = 6-2x / 8


Factorise and solve 3x^2-x-10=0


We're here to help

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

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences