exam Maths Puzzle Numerical Ability

How do I start to multiply this rational expression z^2 - 10z+21/z^2 - 13 + 36 divided by z^2 -11z + 24/z^2 - 9z + 14

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exam Other Question

A graph of | 3y + 4 | < 13 would show

1. dots on -5 and 3 and a line connecting them

2. circles on -5 and 3 and a line connecting them

3. dots on -5 and 3 and arrows
A measuring tape drops from a roof that is 16 feet above the ground. After how many seconds does the measuring tape land on the ground?

How would you write the equation?