exam Maths Puzzle Numerical Ability

Please help me answer this question: 3z-5less than or equal to 3z-13

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exam Other Question

A plane leaves New York at a heading of 240 degrees at a speed of 585 miles per hour. After traveling for 2 hours and 45 minutes, the pilot has to change course and slow down to av I need help to perform the indicated operation

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

I need to find (g of)(x)