book Maths Puzzle Numerical Ability

Factoring this trinomial:

x^2+9x+18

6p^2+13pq-5q^2
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book Other Question

How do I convert 9/16 to a percent? Solve by using either addition or substitution. If a unique solution does not exist, state whether the system is dependent or inconsistent.

10x + 2y = 7
Y = -5x + 3