exam Maths Puzzle Numerical Ability

I need help perfoming the indicated operation

f(x)=x+2 g (x)=x2-1

I need to find (g of)(x)

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exam Other Question

what is the domain of this y=2x-1 An office building has 10,950 square feet of office space, If 3373 square feet are rented, what fractions of the total space is still available?