exam Maths Puzzle Numerical Ability

Which two functions are inverses of each other. Show that they are inverse functions. f(x)= x+2 over 4, g(x)= 4x+2, h(x)= x-2 over 4 .

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exam Other Question

write an equation parallel to the given line. Write an equation perpendicular to the given line:
y= one third - 2
one number is 4 less than 3 times
another number.

c 4 5 6 7 8
d 8 11 _ _ _