exam Maths Puzzle Numerical Ability

r^2-5r+6
------------ =?
r^2-4

this problem needs to be reduced completely.

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exam Other Question

Im not sure what to do. There is a graph with 2 lines. y=3 and x=-1. the left bottom corner is shaded. The problem reads: Write a system of inequalitites that has the solution set The melting point for an element is the temperature where the element changes from solid to liquid. If C represents degrees celsius and F represents Fahrenheit, the C= 5(F-32)/9

For what temperatures will mercury be a solid