exam Maths Puzzle Numerical Ability

how would you get the inverse notation of

h(x)=2/3(x+4)

(g o g)o f
f(x)=1-x2 g(x)=3/4x+2

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exam Other Question

Write an equation for each function in the form f(x)= mx+b.

16. f(3)=9, f(5)=15
17. f(-2)=4, f(2)=-16
18. f(0)=5, f(-5)=10
19. f(10)=4, m=1/2 The difference of two integers is 9. Five times the smaller is 7 more than three times the larger. Find the numbers.